usr/src/sys/netns/ns_error.h

/*
 * Copyright (c) 1984, 1988 Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms are permitted
 * provided that the above copyright notice and this paragraph are
 * duplicated in all such forms and that any documentation,
 * advertising materials, and other materials related to such
 * distribution and use acknowledge that the software was developed
 * by the University of California, Berkeley.  The name of the
 * University may not be used to endorse or promote products derived
 * from this software without specific prior written permission.
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 *
 *      @(#)ns_error.h  7.4 (Berkeley) 6/29/88
 */

/*
 * Xerox NS error messages
 */

struct ns_errp {
        u_short         ns_err_num;             /* Error Number */
        u_short         ns_err_param;           /* Error Parameter */
        struct idp      ns_err_idp;             /* Initial segment of offending
                                                   packet */
        u_char          ns_err_lev2[12];        /* at least this much higher
                                                   level protocol */
};
struct  ns_epidp {
        struct idp ns_ep_idp;
        struct ns_errp ns_ep_errp;
};

#define NS_ERR_UNSPEC   0       /* Unspecified Error detected at dest. */
#define NS_ERR_BADSUM   1       /* Bad Checksum detected at dest */
#define NS_ERR_NOSOCK   2       /* Specified socket does not exist at dest*/
#define NS_ERR_FULLUP   3       /* Dest. refuses packet due to resource lim.*/
#define NS_ERR_UNSPEC_T 0x200   /* Unspec. Error occured before reaching dest*/
#define NS_ERR_BADSUM_T 0x201   /* Bad Checksum detected in transit */
#define NS_ERR_UNREACH_HOST     0x202   /* Dest cannot be reached from here*/
#define NS_ERR_TOO_OLD  0x203   /* Packet x'd 15 routers without delivery*/
#define NS_ERR_TOO_BIG  0x204   /* Packet too large to be forwarded through
                                   some intermediate gateway.  The error
                                   parameter field contains the max packet
                                   size that can be accommodated */
#define NS_ERR_MAX 20

/*
 * Variables related to this implementation
 * of the network systems error message protocol.
 */
struct  ns_errstat {
/* statistics related to ns_err packets generated */
        int     ns_es_error;            /* # of calls to ns_error */
        int     ns_es_oldshort;         /* no error 'cuz old ip too short */
        int     ns_es_oldns_err;        /* no error 'cuz old was ns_err */
        int     ns_es_outhist[NS_ERR_MAX];
/* statistics related to input messages processed */
        int     ns_es_badcode;          /* ns_err_code out of range */
        int     ns_es_tooshort;         /* packet < IDP_MINLEN */
        int     ns_es_checksum;         /* bad checksum */
        int     ns_es_badlen;           /* calculated bound mismatch */
        int     ns_es_reflect;          /* number of responses */
        int     ns_es_inhist[NS_ERR_MAX];
        u_short ns_es_codes[NS_ERR_MAX];/* which error code for outhist
                                           since we might not know all */
};

#ifdef KERNEL
struct  ns_errstat ns_errstat;
#endif