void
maca_recv(iface,axp,src,dest,bp,mcast)
struct iface *iface;
struct ax25_cb *axp;
char *src;
char *dest;
struct mbuf *bp;
int mcast;
{
	int c;
	int32 dt;

	if(iface->ioctl == NULL)
		return bp;	/* No device ioctl - can't do anything */

	c = PULLCHAR(&bp);
	switch(c){
	case MACA_RTS:
		send_ax25(
		/* Mute long enough for the addressed station to send
		 * a CTS. Since that's channel speed dependent, use a special
		 * value to tell the driver to use the right value
		 */
		(*iface->ioctl)(iface,PARAM_MUTE,1,-1);
		break;
	case MACA_CTS:	/* Inhibit transmitter for requested interval */
		dt = pull32(&bp);
		(*iface->ioctl)(iface,PARAM_MUTE,1,dt);
		break;
	}
	return bp;
}