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The veth devices are virtual Ethernet devices. They can act as tunnels between network namespaces to create a bridge to a physical network device in another namespace, but can also be used as standalone network devices. More information can be found here: https://man7.org/linux/man-pages/man4/veth.4.html PiperOrigin-RevId: 638853289
51 lines
1.5 KiB
Go
51 lines
1.5 KiB
Go
// Copyright 2018 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 inet
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import (
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"gvisor.dev/gvisor/pkg/context"
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)
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// contextID is the inet package's type for context.Context.Value keys.
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type contextID int
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const (
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// CtxStack is a Context.Value key for a network stack.
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CtxStack contextID = iota
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// CtxNamespaceByFD is a Context.Value key for NamespaceByFD.
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CtxNamespaceByFD
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)
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// StackFromContext returns the network stack associated with ctx.
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func StackFromContext(ctx context.Context) Stack {
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if v := ctx.Value(CtxStack); v != nil {
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return v.(Stack)
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}
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return nil
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}
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// NamespaceByFD returns the network namespace associated with the specified
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// file descriptor.
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type NamespaceByFD = func(fd int32) (*Namespace, error)
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// NamespaceByFDFromContext returns NamespaceByFD to lookup the network
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// namespace associated with the specified file descriptor.
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func NamespaceByFDFromContext(ctx context.Context) NamespaceByFD {
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if v := ctx.Value(CtxNamespaceByFD); v != nil {
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return v.(NamespaceByFD)
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}
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return nil
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}
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