usr/src/lib/libbc/inc/include/nettli/tcp_tlivar.h

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License, Version 1.0 only
   6  * (the "License").  You may not use this file except in compliance
   7  * with the License.
   8  *
   9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  10  * or http://www.opensolaris.org/os/licensing.
  11  * See the License for the specific language governing permissions
  12  * and limitations under the License.
  13  *
  14  * When distributing Covered Code, include this CDDL HEADER in each
  15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  16  * If applicable, add the following below this CDDL HEADER, with the
  17  * fields enclosed by brackets "[]" replaced with your own identifying
  18  * information: Portions Copyright [yyyy] [name of copyright owner]
  19  *
  20  * CDDL HEADER END
  21  */
  22
  23 /*
  24  * Copyright 1988 Sun Microsystems, Inc.  All rights reserved.
  25  * Use is subject to license terms.
  26  */
  27
  28 #ifndef _TCP_TLIVAR_
  29 #define _TCP_TLIVAR_
  30
  31 #pragma ident   "%Z%%M% %I%     %E% SMI"
  32
  33 /*
  34  * Data structure definitions for the streams interface
  35  * to the socket-based TCP implementation.
  36  */
  37
  38 /*
  39  * Socket Information block contains the special socket wakeup
  40  * hooks. When a block of tt_sockinfo is allocated, the wupalt.wup_arg
  41  * points to the beginning of tt_sockinfo.
  42  */
  43
  44 struct tt_sockinfo {
  45         struct  wupalt  ts_sowakeup;    /* special sock wakeup hook */
  46         u_long          ts_seqnum;      /* connection sequence number */
  47         long            ts_flags;       /* see below */
  48         struct tt_softc *ts_ttp;        /* back ptr to dev-instance handle */
  49 };
  50 /*
  51  * No connection assoicated with this socket
  52  */
  53 #define TT_TS_NOTUSED   0x00
  54 /*
  55  * This socket is connected or pending connection
  56  */
  57 #define TT_TS_INUSE     0x01
  58
  59 /*
  60  * Per-device instance state information.
  61  *
  62  * To aid in handling resource starvation situations, we pre-allocate two
  63  * messages for reporting errors.  Tt_merror is used as a last resort, when
  64  * attempts to allocate a normal error reply fail.  It's allocated in the
  65  * open routine and freed in the close routine.  The routines that produce
  66  * response messages try to keep tt_errack pre-allocated, but don't insist
  67  * that it always be valid.  This strategy attempts to minimize the
  68  * probability of having to fall back on the drastic measure of using the
  69  * M_ERROR message.
  70  */
  71 struct tt_softc {
  72         /* The tt_unit & tt_unitnext fields aren't yet used. */
  73         struct tt_softc *tt_next;       /* link to next device instance */
  74         u_short         tt_unit;        /* instance number */
  75         u_short         tt_unitnext;    /* next unit # to be used on open */
  76
  77         queue_t         *tt_rq;         /* cross-link to read queue */
  78         struct socket   *tt_so;         /* socket for this device instance */
  79         mblk_t          *tt_merror;     /* pre-allocated M_ERROR message */
  80         mblk_t          *tt_errack;     /* pre-allocated T_error_ack message */
  81         u_int           tt_state;       /* current state of the tli automaton */
  82         long            tt_seqnext;     /* next sequence number to assign */
  83         u_long          tt_flags;       /* see below */
  84         u_long          tt_event;       /* service event inidication */
  85         struct  proc    *tt_auxprocp;   /* Aux proc handle */
  86         struct  in_addr tt_laddr;       /* saved local address */
  87         u_short         tt_lport;       /* saved local port number */
  88 };
  89
  90 /*
  91  * Flag (tt_flags) bits private to the driver.
  92  */
  93 #define TT_OPEN         0x01    /* device instance is currently open */
  94 #define TT_ERROR        0x02    /* in error state -- unusable */
  95 #define TT_CLOSE        0x04    /* this device instance is closed */
  96 #define TT_TIMER        0x08    /* scheduled wakeup timer is already set */
  97 /*
  98  * Event (tt_event) bits private to the driver.
  99  */
 100 #define TTE_EVENT       0x01    /* aux proc service wanted indication */
 101 #define TTE_ONQUEUE     0x02    /* set if this ttp has wakeup-event pending */
 102
 103 /*
 104  * Internet style address for TLI
 105  */
 106 struct  taddr_in {
 107         short   sin_family;
 108         u_short sin_port;
 109         struct  in_addr sin_addr;
 110 };
 111
 112 /*
 113  * For use with direct-read only
 114  *  when:
 115  *    - TI is in the correct state
 116  *    - there are data to be read
 117  *    - socket is in state to receive
 118  *    - socket buffer not locked (we are running this
 119  *            at interrupt level !)
 120  *    - the auxproc is not running
 121  */
 122 #define TT_DIRECT_READ(ttp, so) { \
 123         extern int tcptli_auxproc_running; \
 124         if (((ttp)->tt_state & TL_DATAXFER) && \
 125                 ((so)->so_rcv.sb_cc != 0) && \
 126                 (!((so)->so_state & SS_CANTRCVMORE)) && \
 127                 (!((so)->so_rcv.sb_flags & SB_LOCK)) && \
 128                 (!tcptli_auxproc_running)) \
 129                 if (tcptli_Ercv((ttp))) \
 130                         return; \
 131 }
 132
 133 #ifdef  TLIDEBUG
 134 extern  tcptli_debug;
 135 #define TCPTLI_PRINTF if (tcptli_debug) printf
 136 #else
 137 #define TCPTLI_PRINTF
 138 #endif  /* TLIDEBUG */
 139
 140 #endif  /* _TCP_TLIVAR_ */