103 lines
1.8 KiB
Go
103 lines
1.8 KiB
Go
package main
|
|
|
|
import (
|
|
"net"
|
|
"os"
|
|
"fmt"
|
|
"strings"
|
|
"encoding/gob"
|
|
"bytes"
|
|
)
|
|
|
|
type peer struct {
|
|
address net.TCPAddr
|
|
listener net.TCPListener
|
|
connection net.TCPConn
|
|
lpt []peer
|
|
}
|
|
|
|
func (p* peer) SetAddr(port string) {
|
|
service := ":" + port
|
|
tcpAddr, err := net.ResolveTCPAddr("tcp4", service)
|
|
Check(err)
|
|
|
|
p.address = *tcpAddr
|
|
}
|
|
|
|
func (p* peer) StartListening() {
|
|
listener, err := net.ListenTCP("tcp", &p.address)
|
|
Check(err)
|
|
|
|
p.listener = *listener
|
|
|
|
fmt.Printf("(%s) Waiting for peer connections...\n", os.Args[1])
|
|
for {
|
|
conn, err := p.listener.Accept()
|
|
if err != nil {
|
|
continue
|
|
}
|
|
|
|
handleConnection(conn)
|
|
}
|
|
}
|
|
|
|
func (p* peer) Connect(remote peer) {
|
|
peerconn, err := net.DialTCP("tcp4", nil, &remote.address)
|
|
Check(err)
|
|
|
|
fmt.Println("Found a remote peer")
|
|
p.connection = *peerconn
|
|
|
|
p.lpt = append(p.lpt, remote)
|
|
}
|
|
|
|
func (p peer) Version(remote peer) {
|
|
_, err := p.connection.Write([]byte("Hello from " + os.Args[1]))
|
|
Check(err)
|
|
|
|
var buf [512]byte
|
|
|
|
n, err := p.connection.Read(buf[0:])
|
|
Check(err)
|
|
|
|
result := string(buf[0:n])
|
|
fmt.Println(string(result))
|
|
}
|
|
|
|
func (p peer) Transact(remote peer, txn transaction) {
|
|
var b bytes.Buffer
|
|
e := gob.NewEncoder(&b)
|
|
err := e.Encode(txn)
|
|
Check(err)
|
|
|
|
fmt.Println("Encoded struct ", b)
|
|
}
|
|
|
|
func handleConnection(conn net.Conn) {
|
|
// close connection on exit
|
|
defer conn.Close()
|
|
|
|
var buf [512]byte
|
|
|
|
for {
|
|
// read up to 512 bytes
|
|
n, err := conn.Read(buf[0:])
|
|
if err != nil {
|
|
return
|
|
}
|
|
|
|
message := string(buf[0:n])
|
|
fmt.Println(message)
|
|
|
|
tokens := strings.Split(message, " ")
|
|
if tokens[0] != "" {
|
|
response := "Hi " + tokens[2] + ", from " + os.Args[1]
|
|
// write the n bytes read
|
|
_, err2 := conn.Write([]byte(response))
|
|
if err2 != nil {
|
|
return
|
|
}
|
|
}
|
|
}
|
|
}
|