forked from cerc-io/plugeth
116 lines
2.2 KiB
Go
116 lines
2.2 KiB
Go
package main
|
|
|
|
import (
|
|
"net"
|
|
"errors"
|
|
"log"
|
|
)
|
|
|
|
type InMsg struct {
|
|
msgType string // Specifies how the encoded data should be interpreted
|
|
data []byte // RLP encoded data
|
|
}
|
|
|
|
type OutMsg struct {
|
|
msgType string
|
|
data []byte
|
|
}
|
|
|
|
func ReadMessage(conn net.Conn) (*InMsg, error) {
|
|
buff := make([]byte, 4069)
|
|
|
|
// Wait for a message from this peer
|
|
n, err := conn.Read(buff)
|
|
if err != nil {
|
|
return nil, err
|
|
} else if n == 0 {
|
|
return nil, errors.New("Empty message received")
|
|
}
|
|
|
|
// Read the header (MAX n)
|
|
// XXX The data specification is made up. This will change once more details have been released on the specification of the format
|
|
decoder := NewRlpDecoder(buff[:n])
|
|
t := decoder.Get(0).AsString()
|
|
if t == "" {
|
|
return nil, errors.New("Data contained no data type")
|
|
}
|
|
|
|
return &InMsg{msgType: t, data: decoder.Get(1).AsBytes()}, nil
|
|
}
|
|
|
|
type Peer struct {
|
|
server *Server
|
|
conn net.Conn
|
|
outputQueue chan OutMsg
|
|
quit chan bool
|
|
}
|
|
|
|
func NewPeer(conn net.Conn, server *Server) *Peer {
|
|
return &Peer{
|
|
outputQueue: make(chan OutMsg, 1), // Buffered chan of 1 is enough
|
|
quit: make(chan bool),
|
|
|
|
server: server,
|
|
conn: conn,
|
|
}
|
|
}
|
|
|
|
// Outputs any RLP encoded data to the peer
|
|
func (p *Peer) QueueMessage(msgType string, data []byte) {
|
|
p.outputQueue <- OutMsg{msgType: msgType, data: data}
|
|
}
|
|
|
|
func (p *Peer) HandleOutbound() {
|
|
out:
|
|
for {
|
|
select {
|
|
case msg := <-p.outputQueue:
|
|
p.WriteMessage(msg)
|
|
|
|
case <- p.quit:
|
|
break out
|
|
}
|
|
}
|
|
}
|
|
|
|
func (p *Peer) WriteMessage(msg OutMsg) {
|
|
encoded := Encode([]interface{}{ msg.msgType, msg.data })
|
|
_, err := p.conn.Write(encoded)
|
|
if err != nil {
|
|
log.Println(err)
|
|
p.Stop()
|
|
}
|
|
}
|
|
|
|
func (p *Peer) HandleInbound() {
|
|
defer p.Stop()
|
|
|
|
out:
|
|
for {
|
|
msg, err := ReadMessage(p.conn)
|
|
if err != nil {
|
|
log.Println(err)
|
|
|
|
break out
|
|
}
|
|
|
|
// TODO
|
|
data, _ := Decode(msg.data, 0)
|
|
log.Printf("%s, %s\n", msg.msgType, data)
|
|
}
|
|
|
|
// Notify the out handler we're quiting
|
|
p.quit <- true
|
|
}
|
|
|
|
func (p *Peer) Start() {
|
|
go p.HandleOutbound()
|
|
go p.HandleInbound()
|
|
}
|
|
|
|
func (p *Peer) Stop() {
|
|
defer p.conn.Close()
|
|
|
|
p.quit <- true
|
|
}
|