diff options
| author | Kevin Krakauer <krakauer@google.com> | 2021-03-15 18:47:41 -0700 |
|---|---|---|
| committer | gVisor bot <gvisor-bot@google.com> | 2021-03-15 18:49:59 -0700 |
| commit | b1d57877264c2b94e3024375efc9914881f0bbe8 (patch) | |
| tree | fcc3ee1d6ff597411847c4beacd3d8349d33178a /pkg/sentry/devices/tundev/tundev.go | |
| parent | ec45d969236bb98a83e7da0466bd67e540c5e8b5 (diff) | |
Make netstack (//pkg/tcpip) buildable for 32 bit
Doing so involved breaking dependencies between //pkg/tcpip and the rest
of gVisor, which are discouraged anyways.
Tested on the Go branch via:
gvisor.dev/gvisor/pkg/tcpip/...
Addresses #1446.
PiperOrigin-RevId: 363081778
Diffstat (limited to 'pkg/sentry/devices/tundev/tundev.go')
| -rw-r--r-- | pkg/sentry/devices/tundev/tundev.go | 15 |
1 files changed, 7 insertions, 8 deletions
diff --git a/pkg/sentry/devices/tundev/tundev.go b/pkg/sentry/devices/tundev/tundev.go index d8f4e1d35..c43158aa4 100644 --- a/pkg/sentry/devices/tundev/tundev.go +++ b/pkg/sentry/devices/tundev/tundev.go @@ -87,19 +87,18 @@ func (fd *tunFD) Ioctl(ctx context.Context, uio usermem.IO, args arch.SyscallArg if _, err := req.CopyIn(t, data); err != nil { return 0, err } - flags := usermem.ByteOrder.Uint16(req.Data[:]) + + // Validate flags. + flags, err := netstack.LinuxToTUNFlags(usermem.ByteOrder.Uint16(req.Data[:])) + if err != nil { + return 0, err + } return 0, fd.device.SetIff(stack.Stack, req.Name(), flags) case linux.TUNGETIFF: var req linux.IFReq - copy(req.IFName[:], fd.device.Name()) - - // 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. - flags := fd.device.Flags() | linux.IFF_NOFILTER - usermem.ByteOrder.PutUint16(req.Data[:], flags) - + usermem.ByteOrder.PutUint16(req.Data[:], netstack.TUNFlagsToLinux(fd.device.Flags())) _, err := req.CopyOut(t, data) return 0, err |