add seed to random number generator; log proxy error (#83)

* add seed to random number generator

* use a single function to generate tunnel address

* smol fix

* log proxy error

Author: amalshaji

tunnel/internal/client/config/config.go

@@ -15,11 +15,12 @@ import (
 )
 
 type Tunnel struct {
-	Name      string                   `yaml:"name"`
-	Subdomain string                   `yaml:"subdomain"`
-	Port      int                      `yaml:"port"`
-	Host      string                   `yaml:"host"`
-	Type      constants.ConnectionType `yaml:"type"`
+	Name       string                   `yaml:"name"`
+	Subdomain  string                   `yaml:"subdomain"`
+	Port       int                      `yaml:"port"`
+	Host       string                   `yaml:"host"`
+	Type       constants.ConnectionType `yaml:"type"`
+	RemotePort int
 }
 
 func (t *Tunnel) SetDefaults() {
@@ -97,9 +98,16 @@ func (c *ClientConfig) GetHttpTunnelAddr() string {
 	return protocol + "://" + c.Tunnel.Subdomain + "." + c.TunnelUrl
 }
 
-func (c *ClientConfig) GetTcpTunnelAddr(port int) string {
+func (c *ClientConfig) GetTcpTunnelAddr() string {
 	split := strings.Split(c.TunnelUrl, ":")
-	return split[0] + ":" + fmt.Sprint(port)
+	return split[0] + ":" + fmt.Sprint(c.Tunnel.RemotePort)
+}
+
+func (c *ClientConfig) GetTunnelAddr() string {
+	if c.Tunnel.Type == constants.Http {
+		return c.GetHttpTunnelAddr()
+	}
+	return c.GetTcpTunnelAddr()
 }
 
 func (c *ClientConfig) GetServerAddr() string {

tunnel/internal/client/ssh/ssh.go

@@ -99,7 +99,11 @@ func (s *SshClient) startListenerForClient() error {
 	}
 
 	sshClient, err := ssh.Dial("tcp", s.config.SshUrl, sshConfig)
+
 	if err != nil {
+		if s.config.Debug {
+			s.log.Error("failed to connect to ssh server", "error", err)
+		}
 		return err
 	}
 	defer sshClient.Close()
@@ -130,21 +134,15 @@ func (s *SshClient) startListenerForClient() error {
 		return fmt.Errorf("failed to listen on remote endpoint")
 	}
 
+	s.config.Tunnel.RemotePort = remotePort
+
 	defer s.listener.Close()
 
-	if tunnelType == constants.Http {
-		fmt.Printf(
-			"🎉 Tunnel connected: %s -> 🌐 -> %s\n",
-			s.config.GetHttpTunnelAddr(),
-			s.config.Tunnel.GetLocalAddr(),
-		)
-	} else {
-		fmt.Printf(
-			"🎉 Tunnel connected: %s -> 🌐 -> %s\n",
-			s.config.GetTcpTunnelAddr(remotePort),
-			s.config.Tunnel.GetLocalAddr(),
-		)
-	}
+	fmt.Printf(
+		"🎉 Tunnel connected: %s -> 🌐 -> %s\n",
+		s.config.GetTunnelAddr(),
+		s.config.Tunnel.GetLocalAddr(),
+	)
 
 	for {
 		// Accept incoming connections on the remote port
@@ -348,7 +346,7 @@ func (s *SshClient) Shutdown(ctx context.Context) error {
 	if err != nil {
 		return err
 	}
-	s.log.Info("stopping tunnel client server")
+	s.log.Info("stopping tunnel connection", "address", s.config.GetTunnelAddr())
 	return nil
 }
 

tunnel/internal/server/config/config.go

@@ -63,7 +63,7 @@ func new() *Config {
 
 	domain := os.Getenv("PORTR_DOMAIN")
 	if domain == "" {
-		domain = "localhost:8000"
+		domain = "localhost:8001"
 	}
 
 	dbUrl := os.Getenv("PORTR_DB_URL")

tunnel/internal/server/proxy/proxy.go

@@ -81,6 +81,7 @@ func unregisteredSubdomainError(w http.ResponseWriter, subdomain string) {
 }
 
 func (p *Proxy) ErrHandle(res http.ResponseWriter, req *http.Request, err error) {
+	p.log.Error("proxy error", "error", err)
 	p.RemoveRoute(p.config.ExtractSubdomain(req.Host))
 	unregisteredSubdomainError(res, p.config.ExtractSubdomain(req.Host))
 }

tunnel/internal/server/ssh/sshd.go

@@ -84,9 +84,7 @@ func (s *SshServer) Start() {
 					s.log.Error("failed to add port to connection", "error", err)
 					return false
 				}
-			}
-
-			if reservedConnection.Type == string(constants.Http) {
+			} else {
 				err = s.proxy.AddRoute(*reservedConnection.Subdomain, proxyTarget)
 				if err != nil {
 					s.log.Error("failed to add route", "error", err)

tunnel/internal/utils/random.go

@@ -1,8 +1,13 @@
 package utils
 
-import "math/rand"
+import (
+	"math/rand"
+	"time"
+)
 
 func GenerateRandomNumbers(start, end, limit int) []int {
+	rand := rand.New(rand.NewSource(time.Now().UnixNano()))
+
 	randomNumbers := make([]int, limit)
 	for i := range limit {
 		randomNumbers[i] = rand.Intn(end-start) + start