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Annotation of 43BSDReno/sys/netiso/esis.h, revision 1.1.1.1

1.1       root        1: /***********************************************************
                      2:                Copyright IBM Corporation 1987
                      3: 
                      4:                       All Rights Reserved
                      5: 
                      6: Permission to use, copy, modify, and distribute this software and its 
                      7: documentation for any purpose and without fee is hereby granted, 
                      8: provided that the above copyright notice appear in all copies and that
                      9: both that copyright notice and this permission notice appear in 
                     10: supporting documentation, and that the name of IBM not be
                     11: used in advertising or publicity pertaining to distribution of the
                     12: software without specific, written prior permission.  
                     13: 
                     14: IBM DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
                     15: ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
                     16: IBM BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
                     17: ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
                     18: WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
                     19: ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
                     20: SOFTWARE.
                     21: 
                     22: ******************************************************************/
                     23: 
                     24: /*
                     25:  * ARGO Project, Computer Sciences Dept., University of Wisconsin - Madison
                     26:  */
                     27: /*
                     28:  *     $Header: esis.h,v 4.7 88/09/15 11:24:18 hagens Exp $
                     29:  *     $Source: /usr/argo/sys/netiso/RCS/esis.h,v $
                     30:  *     @(#)esis.h      7.3 (Berkeley) 8/29/89 *
                     31:  */
                     32: 
                     33: #ifndef BYTE_ORDER
                     34: /*
                     35:  * Definitions for byte order,
                     36:  * according to byte significance from low address to high.
                     37:  */
                     38: #define        LITTLE_ENDIAN   1234    /* least-significant byte first (vax) */
                     39: #define        BIG_ENDIAN      4321    /* most-significant byte first (IBM, net) */
                     40: #define        PDP_ENDIAN      3412    /* LSB first in word, MSW first in long (pdp) */
                     41: 
                     42: #ifdef vax
                     43: #define        BYTE_ORDER      LITTLE_ENDIAN
                     44: #else
                     45: #define        BYTE_ORDER      BIG_ENDIAN      /* mc68000, tahoe, most others */
                     46: #endif
                     47: #endif BYTE_ORDER
                     48: 
                     49: #define        SNPAC_AGE               60                      /* seconds */
                     50: #define        ESIS_CONFIG             60                      /* seconds */
                     51: #define        ESIS_HT                 (ESIS_CONFIG * 2)
                     52: 
                     53: /*
                     54:  *     Fixed part of an ESIS header
                     55:  */
                     56: struct esis_fixed {
                     57:        u_char  esis_proto_id;          /* network layer protocol identifier */
                     58:        u_char  esis_hdr_len;           /* length indicator (octets) */
                     59:        u_char  esis_vers;                      /* version/protocol identifier extension */
                     60:        u_char  esis_res1;                      /* reserved */
                     61:        u_char  esis_type;                      /* type code */
                     62: /* technically, type should be &='d 0x1f */
                     63: #define ESIS_ESH       0x02            /* End System Hello */
                     64: #define ESIS_ISH       0x04            /* Intermediate System Hello */
                     65: #define ESIS_RD                0x06            /* Redirect */
                     66:        u_char  esis_ht_msb;            /* holding time (seconds) high byte */
                     67:        u_char  esis_ht_lsb;            /* holding time (seconds) low byte */
                     68:        u_char  esis_cksum_msb;         /* checksum high byte */
                     69:        u_char  esis_cksum_lsb;         /* checksum low byte */
                     70: };
                     71: /*
                     72:  * Values for ESIS datagram options
                     73:  */
                     74: #define ESISOVAL_NETMASK       0xe1    /* address mask option, RD PDU only */
                     75: #define ESISOVAL_SNPAMASK      0xe2    /* snpa mask option, RD PDU only */
                     76: #define ESISOVAL_ESCT          0xc6    /* end system conf. timer, ISH PDU only */
                     77: 
                     78: 
                     79: #define        ESIS_CKSUM_OFF          0x07
                     80: #define ESIS_CKSUM_REQUIRED(pdu)\
                     81:        ((pdu->esis_cksum_msb != 0) || (pdu->esis_cksum_lsb != 0))
                     82: 
                     83: #define        ESIS_VERSION    1
                     84: 
                     85: struct esis_stat {
                     86:        u_short         es_nomem;                       /* insufficient memory to send hello */
                     87:        u_short         es_badcsum;                     /* incorrect checksum */
                     88:        u_short         es_badvers;                     /* incorrect version number */
                     89:        u_short         es_badtype;                     /* unknown pdu type field */
                     90:        u_short         es_toosmall;            /* packet too small */
                     91:        u_short         es_eshsent;                     /* ESH sent */
                     92:        u_short         es_eshrcvd;                     /* ESH rcvd */
                     93:        u_short         es_ishsent;                     /* ISH sent */
                     94:        u_short         es_ishrcvd;                     /* ISH rcvd */
                     95:        u_short         es_rdsent;                      /* RD sent */
                     96:        u_short         es_rdrcvd;                      /* RD rcvd */
                     97: };
                     98: 
                     99: #ifdef KERNEL
                    100: struct esis_stat esis_stat;
                    101: #endif KERNEL

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