github.com/SagerNet/gvisor@v0.0.0-20210707092255-7731c139d75c/pkg/tcpip/stack/iptables_state.go (about)

     1  // Copyright 2020 The gVisor Authors.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package stack
    16  
    17  import (
    18  	"time"
    19  )
    20  
    21  // +stateify savable
    22  type unixTime struct {
    23  	second int64
    24  	nano   int64
    25  }
    26  
    27  // saveLastUsed is invoked by stateify.
    28  func (cn *conn) saveLastUsed() unixTime {
    29  	return unixTime{cn.lastUsed.Unix(), cn.lastUsed.UnixNano()}
    30  }
    31  
    32  // loadLastUsed is invoked by stateify.
    33  func (cn *conn) loadLastUsed(unix unixTime) {
    34  	cn.lastUsed = time.Unix(unix.second, unix.nano)
    35  }
    36  
    37  // beforeSave is invoked by stateify.
    38  func (ct *ConnTrack) beforeSave() {
    39  	ct.mu.Lock()
    40  }