The Design and Implementation of the FreeBSD Operating System, Second Edition
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FreeBSD/Linux Kernel Cross Reference
sys/netiso/tp_param.h

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    1 /*      $NetBSD: tp_param.h,v 1.14 2003/08/11 15:17:30 itojun Exp $     */
    2 
    3 /*-
    4  * Copyright (c) 1991, 1993
    5  *      The Regents of the University of California.  All rights reserved.
    6  *
    7  * Redistribution and use in source and binary forms, with or without
    8  * modification, are permitted provided that the following conditions
    9  * are met:
   10  * 1. Redistributions of source code must retain the above copyright
   11  *    notice, this list of conditions and the following disclaimer.
   12  * 2. Redistributions in binary form must reproduce the above copyright
   13  *    notice, this list of conditions and the following disclaimer in the
   14  *    documentation and/or other materials provided with the distribution.
   15  * 3. Neither the name of the University nor the names of its contributors
   16  *    may be used to endorse or promote products derived from this software
   17  *    without specific prior written permission.
   18  *
   19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   29  * SUCH DAMAGE.
   30  *
   31  *      @(#)tp_param.h  8.1 (Berkeley) 6/10/93
   32  */
   33 
   34 /***********************************************************
   35                 Copyright IBM Corporation 1987
   36 
   37                       All Rights Reserved
   38 
   39 Permission to use, copy, modify, and distribute this software and its
   40 documentation for any purpose and without fee is hereby granted,
   41 provided that the above copyright notice appear in all copies and that
   42 both that copyright notice and this permission notice appear in
   43 supporting documentation, and that the name of IBM not be
   44 used in advertising or publicity pertaining to distribution of the
   45 software without specific, written prior permission.
   46 
   47 IBM DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
   48 ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
   49 IBM BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
   50 ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
   51 WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
   52 ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
   53 SOFTWARE.
   54 
   55 ******************************************************************/
   56 
   57 /*
   58  * ARGO Project, Computer Sciences Dept., University of Wisconsin - Madison
   59  */
   60 
   61 #ifndef _NETISO_TP_PARAM_H_
   62 #define _NETISO_TP_PARAM_H_
   63 
   64 /******************************************************
   65  * compile time parameters that can be changed
   66  *****************************************************/
   67 
   68 #define         TP_CLASSES_IMPLEMENTED 0x11     /* zero and 4 */
   69 
   70 #define         TP_DECBIT_CLEAR_COUNT   3
   71 
   72 /* #define      N_TPREF                         100 */
   73 #ifdef _KERNEL
   74 extern int      N_TPREF;
   75 #endif
   76 
   77 #define         TP_SOCKBUFSIZE          ((u_long)4096)
   78 #define         TP0_SOCKBUFSIZE         ((u_long)512)
   79 #define         MAX_TSAP_SEL_LEN        64
   80 
   81 /* maximum tpdu size we'll accept: */
   82 #define         TP_TPDUSIZE                     0xc     /* 4096 octets for
   83                                                          * classes 1-4 */
   84 #define         TP0_TPDUSIZE            0xb     /* 2048 octets for class 0 */
   85 #define         TP_DFL_TPDUSIZE         0x7     /* 128 octets default */
   86 /*
   87  * NOTE: don't ever negotiate 8192 because could get wraparound in
   88  * checksumming (No mtu is likely to be larger than 4K anyway...)
   89  */
   90 #define         TP_NRETRANS                     12      /* TCP_MAXRXTSHIFT + 1 */
   91 #define         TP_MAXRXTSHIFT          6       /* factor of 64 */
   92 #define         TP_MAXPORT                      0xefff
   93 
   94 /*
   95  * ALPHA: to be used in the context: gain= 1/(2**alpha), or put another way,
   96  * gaintimes(x) (x)>>alpha (forgetting the case alpha==0)
   97  */
   98 #define         TP_RTT_ALPHA            3
   99 #define         TP_RTV_ALPHA            2
  100 #define         TP_REXMTVAL(tpcb)\
  101         (((tp_rttadd + (tpcb)->tp_rtt + ((tpcb)->tp_rtv)) << 2) / tp_rttdiv)
  102 #define         TP_RANGESET(tv, value, min, max) \
  103         ((tv = value) > (max) ? (tv = max) : (tv < min ? tv = min : tv))
  104 
  105 /*
  106  * not sure how to treat data on disconnect
  107  */
  108 #define         T_CONN_DATA                     0x1
  109 #define         T_DISCONNECT            0x2
  110 #define         T_DISC_DATA                     0x4
  111 #define         T_XDATA                         0x8
  112 
  113 #define ISO_CLNS         0
  114 #define IN_CLNS          1
  115 #define ISO_CONS         2
  116 #define ISO_COSNS        3
  117 #define TP_MAX_NETSERVICES 3
  118 
  119 /* Indices into tp stats ackreason[i] */
  120 #define _ACK_DONT_ 0
  121 #define _ACK_STRAT_EACH_ 0x1
  122 #define _ACK_STRAT_FULLWIN_ 0x2
  123 #define _ACK_DUP_ 0x3
  124 #define _ACK_EOT_ 0x4
  125 #define _ACK_REORDER_ 0x5
  126 #define _ACK_USRRCV_ 0x6
  127 #define _ACK_FCC_ 0x7
  128 #define _ACK_NUM_REASONS_ 0x8
  129 
  130 /* masks for use in tp_stash() */
  131 #define ACK_DONT                        0
  132 #define ACK_STRAT_EACH          (1<< _ACK_STRAT_EACH_)
  133 #define ACK_STRAT_FULLWIN       (1<< _ACK_STRAT_FULLWIN_)
  134 #define ACK_DUP                         (1<< _ACK_DUP_)
  135 #define ACK_EOT                         (1<< _ACK_EOT_)
  136 #define ACK_REORDER                     (1<< _ACK_REORDER_)
  137 
  138 /******************************************************
  139  * constants used in the protocol
  140  *****************************************************/
  141 
  142 #define         TP_VERSION                      0x1
  143 
  144 #define         TP_MAX_HEADER_LEN       256
  145 
  146 #define         TP_MIN_TPDUSIZE         0x7     /* 128 octets */
  147 #define         TP_MAX_TPDUSIZE         0xd     /* 8192 octets */
  148 
  149 #define         TP_MAX_XPD_DATA         0x10    /* 16 octets */
  150 #define         TP_MAX_CC_DATA          0x20    /* 32 octets */
  151 #define         TP_MAX_CR_DATA          TP_MAX_CC_DATA
  152 #define         TP_MAX_DR_DATA          0x40    /* 64 octets */
  153 
  154 #define         TP_XTD_FMT_BIT  0x80000000
  155 #define         TP_XTD_FMT_MASK 0x7fffffff
  156 #define         TP_NML_FMT_BIT  0x80
  157 #define         TP_NML_FMT_MASK 0x7f
  158 
  159 /*
  160  * values for the tpdu_type field, 2nd byte in a tpdu
  161  */
  162 
  163 #define TP_MIN_TPDUTYPE 0x1
  164 
  165 #define XPD_TPDU_type   0x1
  166 #define XAK_TPDU_type   0x2
  167 #define GR_TPDU_type    0x3
  168 #define AK_TPDU_type    0x6
  169 #define ER_TPDU_type    0x7
  170 #define DR_TPDU_type    0x8
  171 #define DC_TPDU_type    0xc
  172 #define CC_TPDU_type    0xd
  173 #define CR_TPDU_type    0xe
  174 #define DT_TPDU_type    0xf
  175 
  176 #define TP_MAX_TPDUTYPE 0xf
  177 
  178 /*
  179  * identifiers for the variable-length options in tpdus
  180  */
  181 
  182 #define         TPP_acktime                     0x85
  183 #define         TPP_residER                     0x86
  184 #define         TPP_priority            0x87
  185 #define         TPP_transdelay          0x88
  186 #define         TPP_throughput          0x89
  187 #define         TPP_subseq                      0x8a
  188 #define         TPP_flow_cntl_conf      0x8c    /* not implemented */
  189 #define         TPP_addl_info           0xe0
  190 #define         TPP_tpdu_size           0xc0
  191 #define         TPP_calling_sufx        0xc1
  192 #define         TPP_invalid_tpdu        0xc1    /* the bozos used a value
  193                                                  * twice */
  194 #define         TPP_called_sufx         0xc2
  195 #define         TPP_checksum            0xc3
  196 #define         TPP_vers                        0xc4
  197 #define         TPP_security            0xc5
  198 #define         TPP_addl_opt            0xc6
  199 #define         TPP_alt_class           0xc7
  200 #define         TPP_perf_meas           0xc8    /* local item : perf meas on,
  201                                                  * svp */
  202 #define         TPP_ptpdu_size          0xf0    /* preferred TPDU size */
  203 #define         TPP_inact_time          0xf2    /* inactivity time exchanged */
  204 
  205 
  206 /******************************************************
  207  * Some fundamental data types
  208  *****************************************************/
  209 #ifndef         TRUE
  210 #define         TRUE                            1
  211 #endif                          /* TRUE */
  212 
  213 #ifndef         FALSE
  214 #define         FALSE                           0
  215 #endif                          /* FALSE */
  216 
  217 #define         TP_LOCAL                                22
  218 #define         TP_FOREIGN                              33
  219 
  220 #ifndef         EOK
  221 #define         EOK     0
  222 #endif                          /* EOK */
  223 
  224 #define         TP_CLASS_0      (1<<0)
  225 #define         TP_CLASS_1      (1<<1)
  226 #define         TP_CLASS_2      (1<<2)
  227 #define         TP_CLASS_3      (1<<3)
  228 #define         TP_CLASS_4      (1<<4)
  229 
  230 #define         TP_FORCE        0x1
  231 #define         TP_STRICT       0x2
  232 
  233 /*
  234  * if ../sys/mbuf.h gets MT_types up to 0x40, these will have to be changed:
  235  */
  236 #define         MT_XPD                          0x44
  237 #define         MT_EOT                          0x40
  238 
  239 #define         TP_ENOREF                       0x80000000
  240 
  241 typedef unsigned int SeqNum;
  242 typedef unsigned short RefNum;
  243 
  244 /******************************************************
  245  * Macro used all over, for driver
  246  *****************************************************/
  247 
  248 #define  DoEvent(x) \
  249   ((E.ev_number=(x)),(tp_driver(tpcb,&E)))
  250 
  251 /******************************************************
  252  * Some macros used all over, for timestamping
  253  *****************************************************/
  254 
  255 #define GET_CUR_TIME(tvalp) ((*tvalp) = time)
  256 
  257 #define GET_TIME_SINCE(oldtvalp, diffp) {\
  258         (diffp)->tv_sec = time.tv_sec - (oldtvalp)->tv_sec;\
  259         (diffp)->tv_usec = time.tv_usec - (oldtvalp)->tv_usec;\
  260         if( (diffp)->tv_usec <0 ) {\
  261                 (diffp)->tv_sec --;\
  262                 (diffp)->tv_usec = 1000000 - (diffp)->tv_usec;\
  263         }\
  264 }
  265 
  266 /******************************************************
  267  * Macro used for changing types of mbufs
  268  *****************************************************/
  269 
  270 #define CHANGE_MTYPE(m, TYPE)\
  271         if((m)->m_type != TYPE) { \
  272                 mbstat.m_mtypes[(m)->m_type]--; mbstat.m_mtypes[TYPE]++; \
  273                 (m)->m_type = TYPE; \
  274         }
  275 
  276 /******************************************************
  277  * Macros used for adding options to a tpdu header and for
  278  * parsing the headers.
  279  * Options are variable-length and must be bcopy-d because on the
  280  * RT your assignments must be N-word aligned for objects of length
  281  * N.  Such a drag.
  282  *****************************************************/
  283 
  284 struct tp_vbp {
  285         u_char          tpv_code;
  286         char            tpv_len;
  287         char            tpv_val;
  288 };
  289 #define vbptr(x) ((struct tp_vbp *)(x))
  290 #define vbval(x,type) (*((type *)&(((struct tp_vbp *)(x))->tpv_val)))
  291 #define vbcode(x) (vbptr(x)->tpv_code)
  292 #define vblen(x) (vbptr(x)->tpv_len)
  293 
  294 #define vb_putval(dst,type,src)\
  295         bcopy((caddr_t)&(src),(caddr_t)&(((struct tp_vbp *)(dst))->tpv_val),\
  296         sizeof(type))
  297 
  298 #define vb_getval(src,type,dst)\
  299 bcopy((caddr_t)&(((struct tp_vbp *)(src))->tpv_val),(caddr_t)&(dst),sizeof(type))
  300 
  301 #define ADDOPTION(type, DU, len, src)\
  302 {       caddr_t P;\
  303         P = (caddr_t)(DU) + (int)((DU)->tpdu_li);\
  304         vbptr(P)->tpv_code = type;\
  305         vbptr(P)->tpv_len = len;\
  306         bcopy((caddr_t)&src, (caddr_t)&(vbptr(P)->tpv_val), (unsigned)len);\
  307         DU->tpdu_li += len+2;/* 1 for code, 1 for length */\
  308 }
  309 /******************************************************
  310  * Macro for the local credit:
  311  * uses max transmission unit for the ll
  312  * (as modified by the max TPDU size negotiated)
  313  *****************************************************/
  314 
  315 #if defined(ARGO_DEBUG)&&!defined(LOCAL_CREDIT_EXPAND)
  316 #define LOCAL_CREDIT(tpcb) tp_local_credit(tpcb)
  317 #else
  318 #define LOCAL_CREDIT(tpcb) { if (tpcb->tp_rsycnt == 0) {\
  319     struct sockbuf *xxsb = &((tpcb)->tp_sock->so_rcv);\
  320     int xxi = sbspace(xxsb);\
  321     xxi = (xxi<0) ? 0 : ((xxi) / (tpcb)->tp_l_tpdusize);\
  322     xxi = min(xxi, (tpcb)->tp_maxlcredit); \
  323     if (!(tpcb->tp_cebit_off)) { \
  324         (tpcb)->tp_lcredit = ROUND((tpcb)->tp_win_recv); \
  325         if (xxi < (tpcb)->tp_lcredit) { \
  326             (tpcb)->tp_lcredit = xxi; \
  327         } \
  328     } else \
  329         (tpcb)->tp_lcredit = xxi; \
  330 } }
  331 #endif                          /* ARGO_DEBUG */
  332 
  333 #ifdef _KERNEL
  334 extern int      tp_rttadd, tp_rttdiv;
  335 #include <sys/syslog.h>
  336 #define printf logpri(LOG_DEBUG),addlog
  337 
  338 #ifndef  tp_NSTATES
  339 
  340 #include <netiso/tp_states.h>
  341 #include <netiso/tp_events.h>
  342 
  343 #ifndef __CONCAT3
  344 # if __STDC__
  345 #  define __CONCAT3(a,b,c) a ## b ## c
  346 # else
  347 #  define __CONCAT3(a,b,c) a/**/b/**/c
  348 # endif /* __STDC__ */
  349 #endif
  350 
  351 #define TPDU_ATTR(X)    __CONCAT3(ev_union.EV_,X,_TPDU)
  352 
  353 #endif /* tp_NSTATES  */
  354 #endif /* _KERNEL */
  355 
  356 #endif /* _NETISO_TP_PARAM_H_ */

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