mirror of
https://github.com/netbirdio/gvisor.git
synced 2026-05-22 17:12:49 -07:00
Zach Koopmans
54b71221c0
Remove three syserror entries duplicated in linuxerr. Because of the linuxerr.Equals method, this is a mere change of return values from syserror to linuxerr definitions. Done with only these three errnos as CLs removing all grow to a significantly large size. PiperOrigin-RevId: 382173835
52 lines
1.6 KiB
Go
52 lines
1.6 KiB
Go
// Copyright 2021 The gVisor Authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package netstack
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import (
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"gvisor.dev/gvisor/pkg/abi/linux"
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"gvisor.dev/gvisor/pkg/errors/linuxerr"
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"gvisor.dev/gvisor/pkg/tcpip/link/tun"
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)
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// TUNFlagsToLinux converts a tun.Flags to Linux TUN flags.
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func TUNFlagsToLinux(flags tun.Flags) uint16 {
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ret := uint16(linux.IFF_NOFILTER)
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if flags.TAP {
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ret |= linux.IFF_TAP
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}
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if flags.TUN {
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ret |= linux.IFF_TUN
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}
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if flags.NoPacketInfo {
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ret |= linux.IFF_NO_PI
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}
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return ret
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}
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// LinuxToTUNFlags converts Linux TUN flags to a tun.Flags.
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func LinuxToTUNFlags(flags uint16) (tun.Flags, error) {
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// Linux adds IFF_NOFILTER (the same value as IFF_NO_PI unfortunately)
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// when there is no sk_filter. See __tun_chr_ioctl() in
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// net/drivers/tun.c.
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if flags&^uint16(linux.IFF_TUN|linux.IFF_TAP|linux.IFF_NO_PI|linux.IFF_ONE_QUEUE) != 0 {
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return tun.Flags{}, linuxerr.EINVAL
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}
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return tun.Flags{
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TUN: flags&linux.IFF_TUN != 0,
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TAP: flags&linux.IFF_TAP != 0,
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NoPacketInfo: flags&linux.IFF_NO_PI != 0,
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}, nil
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}
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