From e187711c6545487d4cac3701f0f506bb536234e2 Mon Sep 17 00:00:00 2001
From: ethersphere <thesw@rm.eth>
Date: Wed, 20 Jun 2018 14:06:27 +0200
Subject: swarm: network rewrite merge
---
swarm/pss/ping.go | 96 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 96 insertions(+)
create mode 100644 swarm/pss/ping.go
(limited to 'swarm/pss/ping.go')
diff --git a/swarm/pss/ping.go b/swarm/pss/ping.go
new file mode 100644
index 000000000..2ef072918
--- /dev/null
+++ b/swarm/pss/ping.go
@@ -0,0 +1,96 @@
+// 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 (
+ "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(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(&PingMsg{
+ Created: time.Now(),
+ Pong: ispong,
+ })
+ case <-quitC:
+ }
+ }
+ }()
+ err := pp.Run(ping.pingHandler)
+ quitC <- struct{}{}
+ return err
+ },
+ }
+}
--
cgit v1.2.3