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// Copyright 2021 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 network
import (
"fmt"
"gvisor.dev/gvisor/pkg/tcpip"
"gvisor.dev/gvisor/pkg/tcpip/stack"
"gvisor.dev/gvisor/pkg/tcpip/transport"
)
// Resume implements tcpip.ResumableEndpoint.Resume.
func (e *Endpoint) Resume(s *stack.Stack) {
e.mu.Lock()
defer e.mu.Unlock()
e.stack = s
for m := range e.multicastMemberships {
if err := e.stack.JoinGroup(e.netProto, m.nicID, m.multicastAddr); err != nil {
panic(fmt.Sprintf("e.stack.JoinGroup(%d, %d, %s): %s", e.netProto, m.nicID, m.multicastAddr, err))
}
}
info := e.Info()
switch state := e.State(); state {
case transport.DatagramEndpointStateInitial, transport.DatagramEndpointStateClosed:
case transport.DatagramEndpointStateBound:
if len(info.ID.LocalAddress) != 0 && !e.isBroadcastOrMulticast(info.RegisterNICID, e.effectiveNetProto, info.ID.LocalAddress) {
if e.stack.CheckLocalAddress(info.RegisterNICID, e.effectiveNetProto, info.ID.LocalAddress) == 0 {
panic(fmt.Sprintf("got e.stack.CheckLocalAddress(%d, %d, %s) = 0, want != 0", info.RegisterNICID, e.effectiveNetProto, info.ID.LocalAddress))
}
}
case transport.DatagramEndpointStateConnected:
var err tcpip.Error
multicastLoop := e.ops.GetMulticastLoop()
e.connectedRoute, err = e.stack.FindRoute(info.RegisterNICID, info.ID.LocalAddress, info.ID.RemoteAddress, e.effectiveNetProto, multicastLoop)
if err != nil {
panic(fmt.Sprintf("e.stack.FindRoute(%d, %s, %s, %d, %t): %s", info.RegisterNICID, info.ID.LocalAddress, info.ID.RemoteAddress, e.effectiveNetProto, multicastLoop, err))
}
default:
panic(fmt.Sprintf("unhandled state = %s", state))
}
}
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