#define SSHMUX_COMMAND_OPEN 1 /* Open new connection */
#define SSHMUX_COMMAND_ALIVE_CHECK 2 /* Check master is alive */
#define SSHMUX_COMMAND_TERMINATE 3 /* Ask master to exit */
+#define SSHMUX_COMMAND_PORTFORWARD 4 /* Ask master to portforward */
#define SSHMUX_FLAG_TTY (1) /* Request tty on open */
#define SSHMUX_FLAG_SUBSYS (1<<1) /* Subsystem request on open */
#define SSHMUX_FLAG_X11_FWD (1<<2) /* Request X11 forwarding */
#define SSHMUX_FLAG_AGENT_FWD (1<<3) /* Request agent forwarding */
+#define SSHMUX_FLAG_PORTFORWARD (1<<4) /* Request portforward */