tcp_tlivar.h revision 7c478bd95313f5f23a4c958a745db2134aa03244
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
#pragma ident "%Z%%M% %I% %E% SMI"
/*
* Copyright (c) 1988 by Sun Microsystems, Inc.
*/
#ifndef _TCP_TLIVAR_
#define _TCP_TLIVAR_
/*
* Data structure definitions for the streams interface
* to the socket-based TCP implementation.
*/
/*
* Socket Information block contains the special socket wakeup
* hooks. When a block of tt_sockinfo is allocated, the wupalt.wup_arg
* points to the beginning of tt_sockinfo.
*/
struct tt_sockinfo {
struct wupalt ts_sowakeup; /* special sock wakeup hook */
u_long ts_seqnum; /* connection sequence number */
long ts_flags; /* see below */
struct tt_softc *ts_ttp; /* back ptr to dev-instance handle */
};
/*
* No connection assoicated with this socket
*/
#define TT_TS_NOTUSED 0x00
/*
* This socket is connected or pending connection
*/
#define TT_TS_INUSE 0x01
/*
* Per-device instance state information.
*
* To aid in handling resource starvation situations, we pre-allocate two
* messages for reporting errors. Tt_merror is used as a last resort, when
* attempts to allocate a normal error reply fail. It's allocated in the
* open routine and freed in the close routine. The routines that produce
* response messages try to keep tt_errack pre-allocated, but don't insist
* that it always be valid. This strategy attempts to minimize the
* probability of having to fall back on the drastic measure of using the
* M_ERROR message.
*/
struct tt_softc {
/* The tt_unit & tt_unitnext fields aren't yet used. */
struct tt_softc *tt_next; /* link to next device instance */
u_short tt_unit; /* instance number */
u_short tt_unitnext; /* next unit # to be used on open */
queue_t *tt_rq; /* cross-link to read queue */
struct socket *tt_so; /* socket for this device instance */
mblk_t *tt_merror; /* pre-allocated M_ERROR message */
mblk_t *tt_errack; /* pre-allocated T_error_ack message */
u_int tt_state; /* current state of the tli automaton */
long tt_seqnext; /* next sequence number to assign */
u_long tt_flags; /* see below */
u_long tt_event; /* service event inidication */
struct proc *tt_auxprocp; /* Aux proc handle */
struct in_addr tt_laddr; /* saved local address */
u_short tt_lport; /* saved local port number */
};
/*
* Flag (tt_flags) bits private to the driver.
*/
#define TT_OPEN 0x01 /* device instance is currently open */
#define TT_ERROR 0x02 /* in error state -- unusable */
#define TT_CLOSE 0x04 /* this device instance is closed */
#define TT_TIMER 0x08 /* scheduled wakeup timer is already set */
/*
* Event (tt_event) bits private to the driver.
*/
#define TTE_EVENT 0x01 /* aux proc service wanted indication */
#define TTE_ONQUEUE 0x02 /* set if this ttp has wakeup-event pending */
/*
* Internet style address for TLI
*/
struct taddr_in {
short sin_family;
u_short sin_port;
struct in_addr sin_addr;
};
/*
* For use with direct-read only
* when:
* - TI is in the correct state
* - there are data to be read
* - socket is in state to receive
* - socket buffer not locked (we are running this
* at interrupt level !)
* - the auxproc is not running
*/
#define TT_DIRECT_READ(ttp, so) { \
extern int tcptli_auxproc_running; \
if (((ttp)->tt_state & TL_DATAXFER) && \
((so)->so_rcv.sb_cc != 0) && \
(!((so)->so_state & SS_CANTRCVMORE)) && \
(!((so)->so_rcv.sb_flags & SB_LOCK)) && \
(!tcptli_auxproc_running)) \
if (tcptli_Ercv((ttp))) \
return; \
}
#ifdef TLIDEBUG
extern tcptli_debug;
#define TCPTLI_PRINTF if (tcptli_debug) printf
#else
#define TCPTLI_PRINTF
#endif TLIDEBUG
#ifdef KERNEL
extern struct tt_softc tt_softc[];
#endif KERNEL
#endif _TCP_TLIVAR_