IOP_MAXCHAN
u_char send_state[IOP_MAXCHAN]; /* send channel states */
u_char recv_state[IOP_MAXCHAN]; /* receive channel states */
SIMPLEQ_HEAD(, iop_msg) sendq[IOP_MAXCHAN];
SIMPLEQ_HEAD(, iop_msg) recvq[IOP_MAXCHAN];
iop_msg_handler listeners[IOP_MAXCHAN];
void *listener_data[IOP_MAXCHAN];
#define IOP_MSGBUFLEN (IOP_MSGLEN * IOP_MAXCHAN)
for (i = 0; i < IOP_MAXCHAN; i++) {