mirror of https://github.com/poanetwork/quorum.git
98 lines
2.5 KiB
Go
98 lines
2.5 KiB
Go
// Copyright 2018 The go-ethereum Authors
|
|
// This file is part of the go-ethereum library.
|
|
//
|
|
// The go-ethereum library is free software: you can redistribute it and/or modify
|
|
// it under the terms of the GNU Lesser General Public License as published by
|
|
// the Free Software Foundation, either version 3 of the License, or
|
|
// (at your option) any later version.
|
|
//
|
|
// The go-ethereum library is distributed in the hope that it will be useful,
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
// GNU Lesser General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU Lesser General Public License
|
|
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
// +build !nopssprotocol,!nopssping
|
|
|
|
package pss
|
|
|
|
import (
|
|
"context"
|
|
"errors"
|
|
"time"
|
|
|
|
"github.com/ethereum/go-ethereum/p2p"
|
|
"github.com/ethereum/go-ethereum/p2p/protocols"
|
|
"github.com/ethereum/go-ethereum/swarm/log"
|
|
)
|
|
|
|
// Generic ping protocol implementation for
|
|
// pss devp2p protocol emulation
|
|
type PingMsg struct {
|
|
Created time.Time
|
|
Pong bool // set if message is pong reply
|
|
}
|
|
|
|
type Ping struct {
|
|
Pong bool // toggle pong reply upon ping receive
|
|
OutC chan bool // trigger ping
|
|
InC chan bool // optional, report back to calling code
|
|
}
|
|
|
|
func (p *Ping) pingHandler(ctx context.Context, msg interface{}) error {
|
|
var pingmsg *PingMsg
|
|
var ok bool
|
|
if pingmsg, ok = msg.(*PingMsg); !ok {
|
|
return errors.New("invalid msg")
|
|
}
|
|
log.Debug("ping handler", "msg", pingmsg, "outc", p.OutC)
|
|
if p.InC != nil {
|
|
p.InC <- pingmsg.Pong
|
|
}
|
|
if p.Pong && !pingmsg.Pong {
|
|
p.OutC <- true
|
|
}
|
|
return nil
|
|
}
|
|
|
|
var PingProtocol = &protocols.Spec{
|
|
Name: "psstest",
|
|
Version: 1,
|
|
MaxMsgSize: 1024,
|
|
Messages: []interface{}{
|
|
PingMsg{},
|
|
},
|
|
}
|
|
|
|
var PingTopic = ProtocolTopic(PingProtocol)
|
|
|
|
func NewPingProtocol(ping *Ping) *p2p.Protocol {
|
|
return &p2p.Protocol{
|
|
Name: PingProtocol.Name,
|
|
Version: PingProtocol.Version,
|
|
Length: uint64(PingProtocol.MaxMsgSize),
|
|
Run: func(p *p2p.Peer, rw p2p.MsgReadWriter) error {
|
|
quitC := make(chan struct{})
|
|
pp := protocols.NewPeer(p, rw, PingProtocol)
|
|
log.Trace("running pss vprotocol", "peer", p, "outc", ping.OutC)
|
|
go func() {
|
|
for {
|
|
select {
|
|
case ispong := <-ping.OutC:
|
|
pp.Send(context.TODO(), &PingMsg{
|
|
Created: time.Now(),
|
|
Pong: ispong,
|
|
})
|
|
case <-quitC:
|
|
}
|
|
}
|
|
}()
|
|
err := pp.Run(ping.pingHandler)
|
|
quitC <- struct{}{}
|
|
return err
|
|
},
|
|
}
|
|
}
|