dot3.c

来自「eCos操作系统源码」· C语言 代码 · 共 508 行 · 第 1/2 页

    }
    
    if ( (IFT_LOOP == ifp->if_type ) ||
         (IFT_PROPVIRTUAL == ifp->if_type ) ||
         (!supports_dot3)) {
        switch(vp->magic) {
        case DOT3STATSINDEX:
            long_ret = name[(*length)-1];
            return (unsigned char *) &long_ret;
            
        case DOT3STATSETHERCHIPSET:
            *var_len = sizeof(nullobjid);
            return (unsigned char *) nullobjid;
            
        case DOT3STATSDUPLEXSTATUS:
            long_ret = 1;
            return (unsigned char *) &long_ret;
            
        default:
            long_ret = 0; // a dummy value for most of them
            return (unsigned char *) &long_ret;
        }
    }
    
    /* If we got here, the device does support dot3 */
    switch(vp->magic) {
    case DOT3STATSINDEX:
        long_ret = name[(*length)-1];
        return (unsigned char *) &long_ret;
      
    case DOT3STATSALIGNMENTERRORS:
        long_ret = x.rx_align_errors;
        return (unsigned char *) &long_ret;
        
    case DOT3STATSFCSERRORS:
        long_ret = x.rx_crc_errors;
        return (unsigned char *) &long_ret;
        
    case DOT3STATSSINGLECOLLISIONFRAMES:
        long_ret = x.tx_single_collisions;
        return (unsigned char *) &long_ret;
        
    case DOT3STATSMULTIPLECOLLISIONFRAMES:
        long_ret = x.tx_mult_collisions;
        return (unsigned char *) &long_ret;
        
    case DOT3STATSSQETESTERRORS:
        long_ret = x.tx_sqetesterrors;
        return (unsigned char *) &long_ret;
        
    case DOT3STATSDEFERREDTRANSMISSIONS:
        long_ret = x.tx_deferred;
        return (unsigned char *) &long_ret;
        
    case DOT3STATSLATECOLLISIONS:
        long_ret = x.tx_late_collisions;
        return (unsigned char *) &long_ret;
        
    case DOT3STATSEXCESSIVECOLLISIONS:
        long_ret = x.tx_max_collisions;
        return (unsigned char *) &long_ret;
        
    case DOT3STATSINTERNALMACTRANSMITERRORS:
        long_ret = x.tx_underrun;
        return (unsigned char *) &long_ret;
        
    case DOT3STATSCARRIERSENSEERRORS:
        long_ret = x.tx_carrier_loss;
        return (unsigned char *) &long_ret;
      
    case DOT3STATSFRAMETOOLONGS:
        long_ret = x.rx_too_long_frames;
        return (unsigned char *) &long_ret;
      
    case DOT3STATSINTERNALMACRECEIVEERRORS:
        long_ret = x.rx_overrun_errors +
            x.rx_resource_errors;
        return (unsigned char *) &long_ret;
      
    case DOT3STATSSYMBOLERRORS:
        long_ret = x.rx_symbol_errors;
        return (unsigned char *) &long_ret;
        
    case DOT3STATSETHERCHIPSET:
        i = 0;
        while ( i < sizeof(etherobjid) ) {
            if ( 0 == (etherobjid[i] = x.snmp_chipset[i]) )
                break;
            i++;
        }
        if (i)
        {
            *var_len = i;
            return (unsigned char *) etherobjid;
        }
        else
        {
            *var_len = sizeof(nullobjid);
            return (unsigned char *) nullobjid;
        }
        
    case DOT3STATSDUPLEXSTATUS:
        long_ret = x.duplex;
        if ( 1 > long_ret || 3 < long_ret )
            long_ret = 1;
        return (unsigned char *) &long_ret;
      
    default:
        ERROR_MSG("");
        return NULL;
    }
}


#if 0 // UNSUPPORTED: we do not have the information for these tables.
/*
 * var_dot3ControlTable():
 *   Handle this table separately from the scalar value case.
 *   The workings of this are basically the same as for var_dot3ControlTable above.
 */
unsigned char *
var_dot3ControlTable(struct variable *vp,
            oid     *name,
            size_t  *length,
            int     exact,
            size_t  *var_len,
            WriteMethod **write_method)
{
    /* variables we may use later */
    static long long_ret;
    static unsigned char string[SPRINT_MAX_LEN];
    static oid objid[MAX_OID_LEN];
    static struct counter64 c64;
    if (header_simple_table(vp,name,length,exact,var_len,write_method, TABLE_SIZE)
        == MATCH_FAILED )
        return NULL;

    switch(vp->magic) {
    case DOT3CONTROLFUNCTIONSSUPPORTED:
        long_ret = 1;
        return &long_ret;

    case DOT3CONTROLINUNKNOWNOPCODES:
        long_ret = 0;
        return (unsigned char *) &long_ret;

    default:
      ERROR_MSG("");
    }
    return NULL;
}

/*
 * var_dot3PauseTable():
 *   Handle this table separately from the scalar value case.
 *   The workings of this are basically the same as for var_dot3PauseTable above.
 */
unsigned char *
var_dot3PauseTable(struct variable *vp,
            oid     *name,
            size_t  *length,
            int     exact,
            size_t  *var_len,
            WriteMethod **write_method)
{
    /* variables we may use later */
    static long long_ret;
    static unsigned char string[SPRINT_MAX_LEN];
    static oid objid[MAX_OID_LEN];
    static struct counter64 c64;

    if (header_simple_table(vp,name,length,exact,var_len,write_method, TABLE_SIZE)
        == MATCH_FAILED )
        return NULL;
    
    switch(vp->magic) {
    case DOT3PAUSEADMINMODE:
        *write_method = write_dot3PauseAdminMode;
        long_ret = 0;
        return (unsigned char *) &long_ret;

    case DOT3PAUSEOPERMODE:
        long_ret = 0;
        return (unsigned char *) &long_ret;

    case DOT3INPAUSEFRAMES:
        long_ret = 0;
        return (unsigned char *) &long_ret;

    case DOT3OUTPAUSEFRAMES:
        long_ret = 0;
        return (unsigned char *) &long_ret;

    default:
        ERROR_MSG("");
    }
    return NULL;
}


int
write_dot3PauseAdminMode(int      action,
            u_char   *var_val,
            u_char   var_val_type,
            size_t   var_val_len,
            u_char   *statP,
            oid      *name,
            size_t   name_len)
{
    static long *long_ret;
    int size;

    switch ( action ) {
    case RESERVE1:
        if (var_val_type != ASN_INTEGER){
            fprintf(stderr, "write to dot3PauseAdminMode not ASN_INTEGER\n");
            return SNMP_ERR_WRONGTYPE;
        }
        if (var_val_len > sizeof(long_ret)){
            fprintf(stderr,"write to dot3PauseAdminMode: bad length\n");
            return SNMP_ERR_WRONGLENGTH;
        }
        break;
        
    case RESERVE2:
        size = var_val_len;
        long_ret = (long *) var_val;
        break;
        
    case FREE:
        /* Release any resources that have been allocated */
        break;
        
    case ACTION:
        /* The variable has been stored in long_ret for
           you to use, and you have just been asked to do something with
           it.  Note that anything done here must be reversable in the UNDO case */
        break;
        
    case UNDO:
        /* Back out any changes made in the ACTION case */
        break;
        
    case COMMIT:
        /* Things are working well, so it's now safe to make the change
           permanently.  Make sure that anything done here can't fail! */
        break;
    }
    return SNMP_ERR_NOERROR;
}
#endif // UNSUPPORTED

// EOF dot3.c