/
task_net.go
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/
task_net.go
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// Copyright 2018 The gVisor Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package kernel
import (
"github.com/nicocha30/gvisor-ligolo/pkg/sentry/inet"
)
// IsNetworkNamespaced returns true if t is in a non-root network namespace.
func (t *Task) IsNetworkNamespaced() bool {
return !t.netns.Load().IsRoot()
}
// NetworkContext returns the network stack used by the task. NetworkContext
// may return nil if no network stack is available.
//
// TODO(gvisor.dev/issue/1833): Migrate callers of this method to
// NetworkNamespace().
func (t *Task) NetworkContext() inet.Stack {
return t.netns.Load().Stack()
}
// NetworkNamespace returns the network namespace observed by the task.
func (t *Task) NetworkNamespace() *inet.Namespace {
return t.netns.Load()
}
// GetNetworkNamespace takes a reference on the task network namespace and
// returns it. It can return nil if the task isn't alive.
func (t *Task) GetNetworkNamespace() *inet.Namespace {
// t.mu is required to be sure that the network namespace will not be
// released.
t.mu.Lock()
netns := t.netns.Load()
if netns != nil {
netns.IncRef()
}
t.mu.Unlock()
return netns
}