first commit
This commit is contained in:
Gregory Salaun
209
TCPClient.go
Normal file
209
TCPClient.go
Normal file
@@ -0,0 +1,209 @@
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package main
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import (
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"bufio"
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"net"
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"os"
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"regexp"
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"strings"
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"sync"
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"time"
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log "github.com/sirupsen/logrus"
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)
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var spotRe *regexp.Regexp = regexp.MustCompile(`DX\sde\s([\w\d]+).*:\s+(\d+.\d)\s+([\w\d\/]+)\s+(CW|SSB|FT8|FT4|RTTY|USB|LSB)?\s+(.*)\s\s\s+([\d]+\w{1})`)
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var defaultLoginRe *regexp.Regexp = regexp.MustCompile("[\\w\\d-_]+ login:")
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var defaultPasswordRe *regexp.Regexp = regexp.MustCompile("Password:")
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type TCPClient struct {
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Login string
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Password string
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Address string
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Port string
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LoggedIn bool
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Timeout time.Duration
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LogWriter *bufio.Writer
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Reader *bufio.Reader
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Writer *bufio.Writer
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Scanner *bufio.Scanner
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Mutex sync.Mutex
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Conn net.Conn
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TCPServer TCPServer
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MsgChan chan string
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CmdChan chan string
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SpotChanToFlex chan TelnetSpot
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SpotChanToHTTPServer chan TelnetSpot
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Log *log.Logger
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Config *Config
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Countries Countries
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LoginRe *regexp.Regexp
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PasswordRe *regexp.Regexp
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}
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func NewTCPClient(TCPServer *TCPServer, Countries Countries) *TCPClient {
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return &TCPClient{
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Address: Cfg.Cluster.Server,
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Port: Cfg.Cluster.Port,
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Login: Cfg.Cluster.Login,
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Password: Cfg.Cluster.Password,
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MsgChan: TCPServer.MsgChan,
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CmdChan: TCPServer.CmdChan,
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SpotChanToFlex: make(chan TelnetSpot, 100),
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TCPServer: *TCPServer,
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SpotChanToHTTPServer: make(chan TelnetSpot, 100),
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Countries: Countries,
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}
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}
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func (c *TCPClient) setDefaultParams() {
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if c.Timeout == 0 {
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c.Timeout = 600 * time.Second
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}
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if c.LogWriter == nil {
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c.LogWriter = bufio.NewWriter(os.Stdout)
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}
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c.LoggedIn = false
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if c.LoginRe == nil {
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c.LoginRe = defaultLoginRe
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}
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if c.PasswordRe == nil {
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c.PasswordRe = defaultPasswordRe
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}
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}
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func (c *TCPClient) StartClient() {
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var err error
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c.setDefaultParams()
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c.Conn, err = net.Dial("tcp", c.Address+":"+c.Port)
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if err != nil {
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Log.Error("Cannot connect to Telnet Client:", err)
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}
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c.Reader = bufio.NewReader(c.Conn)
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c.Writer = bufio.NewWriter(c.Conn)
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go func() {
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for message := range c.TCPServer.CmdChan {
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Log.Infof("Received Command: %s", message)
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c.Write([]byte(message + "\r\n"))
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}
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}()
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go c.ReadLine()
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}
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func (c *TCPClient) Close() {
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c.Writer.Write([]byte("bye\r\n"))
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}
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func (c *TCPClient) SetFilters() {
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if Cfg.Cluster.FT8 {
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c.Write([]byte("set/ft8\r\n"))
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Log.Info("FT8: On")
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}
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if Cfg.Cluster.Skimmer {
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c.Write([]byte("set/skimmer\r\n"))
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Log.Info("Skimmer: On")
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}
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if Cfg.Cluster.FT4 {
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c.Write([]byte("set/ft4\r\n"))
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Log.Info("FT4: On")
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}
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if !Cfg.Cluster.FT8 {
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c.Write([]byte("set/noft8\r\n"))
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Log.Info("FT8: Off")
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}
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if !Cfg.Cluster.FT4 {
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c.Write([]byte("set/noft4\r\n"))
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Log.Info("FT4: Off")
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}
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if !Cfg.Cluster.Skimmer {
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c.Write([]byte("set/noskimmer\r\n"))
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Log.Info("Skimmer: Off")
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}
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}
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func (c *TCPClient) ReadLine() {
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for {
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if !c.LoggedIn {
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message, err := c.Reader.ReadBytes(':')
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if err != nil {
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Log.Errorf("Error reading message: %s", err)
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c.Conn.Close()
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c.StartClient()
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}
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if strings.Contains(string(message), Cfg.Cluster.LoginPrompt) || strings.Contains(string(message), "login:") {
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time.Sleep(time.Second * 1)
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Log.Debug("Found login prompt...sending callsign")
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c.Write([]byte(c.Login + "\n\r"))
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c.LoggedIn = true
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Log.Infof("Connected to DX cluster %s:%s", Cfg.Cluster.Server, Cfg.Cluster.Port)
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continue
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}
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}
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if c.LoggedIn {
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message, err := c.Reader.ReadBytes('\n')
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messageString := string(message)
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if messageString != "" {
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if err != nil {
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Log.Errorf("Error reading message: %s", err)
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c.Conn.Close()
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c.StartClient()
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}
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if strings.Contains(messageString, "password") {
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Log.Debug("Found password prompt...sending password...")
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c.Write([]byte(c.Password + "\r\n"))
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}
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if strings.Contains(messageString, "Hello") || strings.Contains(messageString, "Welcome") {
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go c.SetFilters()
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if Cfg.Cluster.Command != "" {
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c.Write([]byte(Cfg.Cluster.Command + "\n\r"))
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Log.Debugf("Sending Command: %s", Cfg.Cluster.Command)
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}
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}
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if strings.Contains(messageString, "Error reading from server: read tcp") {
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Log.Error("Disconnected from Telnet Server, reconnecting")
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c.Close()
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c.StartClient()
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}
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if strings.Contains(messageString, "DX") {
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ProcessTelnetSpot(spotRe, messageString, c.SpotChanToFlex, c.SpotChanToHTTPServer, c.Countries)
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}
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// Send the spot message to TCP server
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c.MsgChan <- messageString
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}
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}
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}
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}
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// Write sends raw data to remove telnet server
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func (c *TCPClient) Write(data []byte) (n int, err error) {
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Mutex.Lock()
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n, err = c.Writer.Write(data)
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if err != nil {
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Log.Errorf("Error while sending command to telnet client: %s", err)
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} else {
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err = c.Writer.Flush()
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}
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Mutex.Unlock()
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return
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}
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