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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 packet
import (
"fmt"
"time"
"gvisor.dev/gvisor/pkg/tcpip"
"gvisor.dev/gvisor/pkg/tcpip/buffer"
"gvisor.dev/gvisor/pkg/tcpip/stack"
)
// saveReceivedAt is invoked by stateify.
func (p *packet) saveReceivedAt() int64 {
return p.receivedAt.UnixNano()
}
// loadReceivedAt is invoked by stateify.
func (p *packet) loadReceivedAt(nsec int64) {
p.receivedAt = time.Unix(0, nsec)
}
// saveData saves packet.data field.
func (p *packet) saveData() buffer.VectorisedView {
return p.data.Clone(nil)
}
// loadData loads packet.data field.
func (p *packet) loadData(data buffer.VectorisedView) {
p.data = data
}
// beforeSave is invoked by stateify.
func (ep *endpoint) beforeSave() {
ep.rcvMu.Lock()
defer ep.rcvMu.Unlock()
ep.rcvDisabled = true
}
// afterLoad is invoked by stateify.
func (ep *endpoint) afterLoad() {
ep.mu.Lock()
defer ep.mu.Unlock()
ep.stack = stack.StackFromEnv
ep.ops.InitHandler(ep, ep.stack, tcpip.GetStackSendBufferLimits, tcpip.GetStackReceiveBufferLimits)
if err := ep.stack.RegisterPacketEndpoint(ep.boundNIC, ep.boundNetProto, ep); err != nil {
panic(fmt.Sprintf("RegisterPacketEndpoint(%d, %d, _): %s", ep.boundNIC, ep.boundNetProto, err))
}
ep.rcvMu.Lock()
ep.rcvDisabled = false
ep.rcvMu.Unlock()
}
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