fix(tailnet): update WorkspaceAgentSSHPort to 22

ThomasK33 · ThomasK33 · commit cca709aaa90e · 2025-02-20T17:39:28.000+01:00
Change-Id: Ifd986b260f8ac317e37d65111cd4e0bd1dc38af8
Signed-off-by: Thomas Kosiewski &lt;tk@coder.com&gt;
diff --git a/agent/agent.go b/agent/agent.go
@@ -1193,19 +1193,22 @@ func (a *agent) createTailnet(
 		return nil, xerrors.Errorf("update host signer: %w", err)
 	}
 
-	sshListener, err := network.Listen("tcp", ":"+strconv.Itoa(workspacesdk.AgentSSHPort))
-	if err != nil {
-		return nil, xerrors.Errorf("listen on the ssh port: %w", err)
-	}
-	defer func() {
+	for _, port := range []int{workspacesdk.AgentSSHPort, workspacesdk.AgentStandardSSHPort} {
+		sshListener, err := network.Listen("tcp", ":"+strconv.Itoa(port))
 		if err != nil {
-			_ = sshListener.Close()
+			return nil, xerrors.Errorf("listen on the ssh port (%v): %w", port, err)
+		}
+		// nolint:revive // We do want to only defer at the end of the function.
+		defer func() {
+			if err != nil {
+				_ = sshListener.Close()
+			}
+		}()
+		if err = a.trackGoroutine(func() {
+			_ = a.sshServer.Serve(sshListener)
+		}); err != nil {
+			return nil, err
 		}
-	}()
-	if err = a.trackGoroutine(func() {
-		_ = a.sshServer.Serve(sshListener)
-	}); err != nil {
-		return nil, err
 	}
 
 	reconnectingPTYListener, err := network.Listen("tcp", ":"+strconv.Itoa(workspacesdk.AgentReconnectingPTYPort))
diff --git a/codersdk/workspacesdk/workspacesdk.go b/codersdk/workspacesdk/workspacesdk.go
@@ -29,6 +29,7 @@ var ErrSkipClose = xerrors.New("skip tailnet close")
 
 const (
 	AgentSSHPort             = tailnet.WorkspaceAgentSSHPort
+	AgentStandardSSHPort     = tailnet.WorkspaceAgentStandardSSHPort
 	AgentReconnectingPTYPort = tailnet.WorkspaceAgentReconnectingPTYPort
 	AgentSpeedtestPort       = tailnet.WorkspaceAgentSpeedtestPort
 	// AgentHTTPAPIServerPort serves a HTTP server with endpoints for e.g.
diff --git a/tailnet/conn.go b/tailnet/conn.go
@@ -52,6 +52,7 @@ const (
 	WorkspaceAgentSSHPort             = 1
 	WorkspaceAgentReconnectingPTYPort = 2
 	WorkspaceAgentSpeedtestPort       = 3
+	WorkspaceAgentStandardSSHPort     = 22
 )
 
 // EnvMagicsockDebugLogging enables super-verbose logging for the magicsock
@@ -745,7 +746,7 @@ func (c *Conn) forwardTCP(src, dst netip.AddrPort) (handler func(net.Conn), opts
 		return nil, nil, false
 	}
 	// See: https://github.com/tailscale/tailscale/blob/c7cea825aea39a00aca71ea02bab7266afc03e7c/wgengine/netstack/netstack.go#L888
-	if dst.Port() == WorkspaceAgentSSHPort || dst.Port() == 22 {
+	if dst.Port() == WorkspaceAgentSSHPort || dst.Port() == WorkspaceAgentStandardSSHPort {
 		opt := tcpip.KeepaliveIdleOption(72 * time.Hour)
 		opts = append(opts, &opt)
 	}

Original file line number	Diff line number	Diff line change
`@@ -52,6 +52,7 @@ const (`
`52`	`52`	`WorkspaceAgentSSHPort = 1`
`53`	`53`	`WorkspaceAgentReconnectingPTYPort = 2`
`54`	`54`	`WorkspaceAgentSpeedtestPort = 3`
	`55`	`+ WorkspaceAgentStandardSSHPort = 22`
`55`	`56`	`)`
`56`	`57`
`57`	`58`	`// EnvMagicsockDebugLogging enables super-verbose logging for the magicsock`
`@@ -745,7 +746,7 @@ func (c *Conn) forwardTCP(src, dst netip.AddrPort) (handler func(net.Conn), opts`
`745`	`746`	`return nil, nil, false`
`746`	`747`	`}`
`747`	`748`	`// See: https://github.com/tailscale/tailscale/blob/c7cea825aea39a00aca71ea02bab7266afc03e7c/wgengine/netstack/netstack.go#L888`
`748`		`- if dst.Port() == WorkspaceAgentSSHPort \|\| dst.Port() == 22 {`
	`749`	`+ if dst.Port() == WorkspaceAgentSSHPort \|\| dst.Port() == WorkspaceAgentStandardSSHPort {`
`749`	`750`	`opt := tcpip.KeepaliveIdleOption(72 * time.Hour)`
`750`	`751`	`opts = append(opts, &opt)`
`751`	`752`	`}`