C++ snmp_oid_compare函数代码示例

int snmp_input(int op,
	       struct snmp_session *session,
	       int reqid,
	       struct snmp_pdu *pdu,
	       void *magic)
{
    struct sockaddr_in   *src_ip;
    uint32_t             specific;
    struct variable_list *var;

#ifdef HAVE_NETSNMP
    if (op != NETSNMP_CALLBACK_OP_RECEIVED_MESSAGE)
	goto out;
#else
    if (op != RECEIVED_MESSAGE)
	goto out;
#endif
    if (pdu->command != SNMP_MSG_TRAP)
	goto out;
    if (snmp_oid_compare(ipmi_oid, IPMI_OID_SIZE,
			 pdu->enterprise, pdu->enterprise_length)
	!= 0)
    {
	goto out;
    }
    if (pdu->trap_type != SNMP_TRAP_ENTERPRISESPECIFIC)
	goto out;

    src_ip = (struct sockaddr_in *) &pdu->agent_addr;
    specific = pdu->specific_type;

    var = pdu->variables;
    if (var == NULL)
	goto out;
    if (var->type != ASN_OCTET_STR)
	goto out;
    if (snmp_oid_compare(ipmi_oid, IPMI_OID_SIZE, var->name, var->name_length)
	!= 0)
    {
	goto out;
    }
    if (var->val_len < 46)
	goto out;
    
    ipmi_handle_snmp_trap_data(src_ip,
		    	       sizeof(*src_ip),
			       IPMI_EXTERN_ADDR_IP,
			       specific,
			       var->val.string,
			       var->val_len);

 out:
    return 1;
}

int
agentx_notify(netsnmp_session * session, netsnmp_pdu *pdu)
{
    netsnmp_session       *sp;
    netsnmp_variable_list *var;
    extern const oid       sysuptime_oid[], snmptrap_oid[];
    extern const size_t    sysuptime_oid_len, snmptrap_oid_len;

    sp = find_agentx_session(session, pdu->sessid);
    if (sp == NULL)
        return AGENTX_ERR_NOT_OPEN;

    var = pdu->variables;
    if (!var)
        return AGENTX_ERR_PROCESSING_ERROR;

    if (snmp_oid_compare(var->name, var->name_length,
                         sysuptime_oid, sysuptime_oid_len) == 0) {
        var = var->next_variable;
    }

    if (!var || snmp_oid_compare(var->name, var->name_length,
                                 snmptrap_oid, snmptrap_oid_len) != 0)
        return AGENTX_ERR_PROCESSING_ERROR;

    /*
     *  If sysUptime isn't the first varbind, don't worry.  
     *     send_trap_vars() will add it if necessary.
     *
     *  Note that if this behaviour is altered, it will
     *     be necessary to add sysUptime here,
     *     as this is valid AgentX syntax.
     */

	/* If a context name was specified, send the trap using that context.
	 * Otherwise, send the trap without the context using the old method */
	if (pdu->contextName != NULL)
	{
        send_trap_vars_with_context(-1, -1, pdu->variables, 
                       pdu->contextName);
	}
	else
	{
        send_trap_vars(-1, -1, pdu->variables);
	}

    return AGENTX_ERR_NOERROR;
}

int
header_hrswinst(struct variable *vp,
                oid * name,
                size_t * length,
                int exact, size_t * var_len, WriteMethod ** write_method)
{
#define HRSWINST_NAME_LENGTH	9
    oid             newname[MAX_OID_LEN];
    int             result;

    DEBUGMSGTL(("host/hr_swinst", "var_hrswinst: "));
    DEBUGMSGOID(("host/hr_swinst", name, *length));
    DEBUGMSG(("host/hr_swinst", " %d\n", exact));

    memcpy((char *) newname, (char *) vp->name, vp->namelen * sizeof(oid));
    newname[HRSWINST_NAME_LENGTH] = 0;
    result = snmp_oid_compare(name, *length, newname, vp->namelen + 1);
    if ((exact && (result != 0)) || (!exact && (result >= 0)))
        return (MATCH_FAILED);
    memcpy((char *) name, (char *) newname,
           (vp->namelen + 1) * sizeof(oid));
    *length = vp->namelen + 1;

    *write_method = 0;
    *var_len = sizeof(long);    /* default to 'long' results */
    return (MATCH_SUCCEEDED);
}

int
header_system(struct variable *vp,
	      oid *name,
	      int *length,
	      int exact,
	      int *var_len,
	      WriteMethod **write_method)
{
#define SYSTEM_NAME_LENGTH	8
    oid newname[MAX_OID_LEN];
    int result;
    char c_oid[SPRINT_MAX_LEN];

    if (snmp_get_do_debugging()) {
      sprint_objid (c_oid, name, *length);
      DEBUGMSGTL(("mibII/system", "var_system: %s %d\n", c_oid, exact));
      DEBUGMSGTL(("mibII/system", "vp len: %d / %d\n", vp->namelen, 8));
    }

    memcpy((char *)newname, (char *)vp->name, (int)vp->namelen * sizeof(oid));
    newname[SYSTEM_NAME_LENGTH] = 0;
    result = snmp_oid_compare(name, *length, newname, (int)vp->namelen + 1);
    if ((exact && (result != 0)) || (!exact && (result >= 0)))
        return(MATCH_FAILED);
    memcpy( (char *)name,(char *)newname, ((int)vp->namelen + 1) * sizeof(oid));
    *length = vp->namelen + 1;

    *write_method = 0;
    *var_len = sizeof(long);	/* default to 'long' results */
    return(MATCH_SUCCEEDED);
}

/* header_dummy(...
   Arguments:
   vp            IN     - pointer to variable entry that points here
   name          IN/OUT - IN/name requested, OUT/name found
   length        IN/OUT - length of input and output oid's
   exact         IN     - TRUE if an exact match was requested. 
   var_len       OUT     - length of variable or 0 if function returned.
   write_method  OUT     - pointer to function to set variable, otherwise 0
*/
int
header_dummy(struct variable *vp,
	     oid *name,
	     int *length,
	     int exact,
	     int *var_len,
	     WriteMethod **write_method) 
{
#define DUMMY_NAME_LENGTH	8
    oid newname[MAX_OID_LEN];
    int result;

    /* just do trace and token print */
    DEBUGMSGTL(("dummy/dummy:var_dummy", ""));
    DEBUGMSGOID(("dummy/dummy:var_dummy", name, *length));
    DEBUGMSG(("dummy/dummy:var_dummy", " %d\n", exact));

    memcpy(newname, vp->name, (int)vp->namelen * sizeof(oid));
    newname[DUMMY_NAME_LENGTH] = 0;
    result = snmp_oid_compare(name, *length, newname, (int)vp->namelen + 1);
    if ((exact && (result != 0)) || (!exact && (result >= 0)))
        return(MATCH_FAILED);
    memcpy(name, newname, ((int)vp->namelen + 1) * sizeof(oid));
    *length = vp->namelen + 1;

    *write_method = 0;
    *var_len = sizeof(long);	/* default to 'long' results */
    return(MATCH_SUCCEEDED);
}

u_char *
agentx_var(struct variable *vp,
           oid *name,
           size_t *length,
           int exact,
           size_t *var_len,
           WriteMethod **write_method)
{
    int result;
    AddVarMethod *add_method;

    DEBUGMSGTL(("agentx/master","request to pass to client:  "));
    DEBUGMSGOID(("agentx/master", name, *length));
    DEBUGMSG(("agentx/master","\n"));
	/*
	 * If the requested OID precedes the area of responsibility
	 * of this subagent (and hence it's presumable a non-exact match),
	 * then update the "matched" name to be the starting point
	 */
        /* XXX shouldn't we check exact in this case? */
    result = snmp_oid_compare(name, *length, vp->name, vp->namelen);
    if ( result < 0 ) {
	memcpy((char *)name,(char *)vp->name, vp->namelen*sizeof(oid));
	*length = vp->namelen;
    }
				/* Return a pointer to an appropriate method */
    add_method  = agentx_add_request;
    return (u_char*)add_method;
}

struct header_complex_index *
header_complex_maybe_add_data_by_oid(struct header_complex_index **thedata,
                                     oid * newoid, size_t newoid_len, void *data,
                                     int dont_allow_duplicates)
{
    struct header_complex_index *hciptrn, *hciptrp;
    int rc;

    if (thedata == NULL || newoid == NULL || data == NULL)
        return NULL;

    for (hciptrn = *thedata, hciptrp = NULL;
         hciptrn != NULL; hciptrp = hciptrn, hciptrn = hciptrn->next) {
        /*
         * XXX: check for == and error (overlapping table entries) 
         * 8/2005 rks Ok, I added duplicate entry check, but only log
         *            warning and continue, because it seems that nobody
         *            that calls this fucntion does error checking!.
         */
        rc = snmp_oid_compare(hciptrn->name, hciptrn->namelen,
                              newoid, newoid_len);
        if (rc > 0)
            break;
        else if (0 == rc) {
            snmp_log(LOG_WARNING, "header_complex_add_data_by_oid with "
                     "duplicate index.\n");
            if (dont_allow_duplicates)
                return NULL;
        }
    }

    return _header_complex_add_between(thedata, hciptrp, hciptrn,
                                       newoid, newoid_len, data);
}

int
header_hrdevice (struct variable *vp,
                 oid * name, size_t * length, int exact, size_t * var_len, WriteMethod ** write_method)
{
#define HRDEV_ENTRY_NAME_LENGTH    11
    oid newname[MAX_OID_LEN];

    int dev_idx, LowIndex = -1, LowType = -1;

    int result;

    DEBUGMSGTL (("host/hr_device", "var_hrdevice: "));
    DEBUGMSGOID (("host/hr_device", name, *length));
    DEBUGMSG (("host/hr_device", " %d\n", exact));

    memcpy ((char *) newname, (char *) vp->name, (int) vp->namelen * sizeof (oid));


    /*
     *  Find the "next" device entry.
     *  If we're in the middle of the table, then there's
     *     no point in examining earlier types of devices,
     *     so set the starting type to that of the variable
     *     being queried.
     *  If we've moved from one column of the table to another,
     *     then we need to start at the beginning again.
     *     (i.e. the 'compare' fails to match)
     *  Similarly if we're at the start of the table
     *     (i.e. *length is too short to be a full instance)
     */

    if ((snmp_oid_compare (vp->name, vp->namelen, name, vp->namelen) == 0) && (*length > HRDEV_ENTRY_NAME_LENGTH))
        current_type = (name[HRDEV_ENTRY_NAME_LENGTH] >> HRDEV_TYPE_SHIFT);
    else

static int
header_dlmod(struct variable *vp,
             oid * name,
             size_t * length,
             int exact, size_t * var_len, WriteMethod ** write_method)
{
#define DLMOD_NAME_LENGTH 10
    oid             newname[MAX_OID_LEN];
    int             result;

    memcpy((char *) newname, (char *) vp->name,
           (int) vp->namelen * sizeof(oid));
    newname[DLMOD_NAME_LENGTH] = 0;

    result =
        snmp_oid_compare(name, *length, newname, (int) vp->namelen + 1);
    if ((exact && (result != 0)) || (!exact && (result >= 0))) {
        return MATCH_FAILED;
    }

    memcpy((char *) name, (char *) newname,
           ((int) vp->namelen + 1) * sizeof(oid));
    *length = vp->namelen + 1;
    *write_method = 0;
    *var_len = sizeof(long);    /* default to 'long' results */
    return MATCH_SUCCEEDED;
}

static int
expValueTable_set(struct expExpressionTable_data *expression_data,
                  const char *owner, size_t owner_len, const char *name,
                  size_t name_len, oid *index, size_t index_len)
{
    netsnmp_variable_list *vars = NULL;
    struct expValueTable_data *thedata;
    struct header_complex_index *hcindex;
    int             found = 0;

    for (hcindex = expValueTableStorage; hcindex; hcindex = hcindex->next) {
        thedata = hcindex->data;
        if (strcmp(thedata->expExpressionOwner, owner) == 0 &&
            thedata->expExpressionOwnerLen == owner_len &&
            strcmp(thedata->expExpressionName, name) == 0 &&
            thedata->expExpressionNameLen == name_len) {
            found = 1;
            break;
        }

    }

    if (found) {
        if (snmp_oid_compare(thedata->expValueInstance,
                             thedata->expValueInstanceLen, index,
                             index_len) != 0) {
            SNMP_FREE(thedata->expValueInstance);
            thedata->expValueInstance = netsnmp_memdup(index, index_len);
            thedata->expValueInstanceLen = index_len;
        } else {
            SNMP_FREE(index);
        }
    } else if ((thedata = calloc(1, sizeof(*thedata)))) {
        thedata->expExpressionOwner = owner;
        thedata->expExpressionOwnerLen = owner_len;
        thedata->expExpressionName = name;
        thedata->expExpressionNameLen = name_len;
        thedata->expValueInstance = index;
        thedata->expValueInstanceLen = index_len;
        thedata->expression_data = expression_data;

        snmp_varlist_add_variable(&vars, NULL, 0, ASN_OCTET_STR,
                                  (const char *) thedata->expExpressionOwner,
                                  thedata->expExpressionOwnerLen);
        snmp_varlist_add_variable(&vars, NULL, 0, ASN_OCTET_STR,
                                  (const char *) thedata->expExpressionName,
                                  thedata->expExpressionNameLen);
        snmp_varlist_add_variable(&vars, NULL, 0, ASN_PRIV_IMPLIED_OBJECT_ID,
                                  (u_char *) thedata->expValueInstance,
                                  thedata->expValueInstanceLen * sizeof(oid));

        header_complex_add_data(&expValueTableStorage, vars, thedata);
    } else {
        return SNMPERR_GENERR;
    }

    thedata->set = 1;

    return SNMPERR_SUCCESS;
}

struct vacm_viewEntry *
vacm_getViewEntry(const char *viewName,
                  oid * viewSubtree, size_t viewSubtreeLen, int mode)
{
    struct vacm_viewEntry *vp, *vpret = NULL;
    char            view[VACMSTRINGLEN];
    int             found, glen;
    int count=0;

    glen = (int) strlen(viewName);
    if (glen < 0 || glen >= VACM_MAX_STRING)
        return NULL;
    view[0] = glen;
    strcpy(view + 1, viewName);
    for (vp = viewList; vp; vp = vp->next) {
        if (!memcmp(view, vp->viewName, glen + 1)
            && viewSubtreeLen >= (vp->viewSubtreeLen - 1)) {
            int             mask = 0x80, maskpos = 0;
            int             oidpos;
            found = 1;

            if (mode != VACM_MODE_IGNORE_MASK) {  /* check the mask */
                for (oidpos = 0;
                     found && oidpos < (int) vp->viewSubtreeLen - 1;
                     oidpos++) {
                    if ((vp->viewMask[maskpos] & mask) != 0) {
                        if (viewSubtree[oidpos] !=
                            vp->viewSubtree[oidpos + 1])
                            found = 0;
                    }
                    if (mask == 1) {
                        mask = 0x80;
                        maskpos++;
                    } else
                        mask >>= 1;
                }
            }
            if (found) {
                /*
                 * match successful, keep this node if its longer than
                 * the previous or (equal and lexicographically greater
                 * than the previous). 
                 */
                count++;
                if (mode == VACM_MODE_CHECK_SUBTREE) {
                    vpret = vp;
                } else if (vpret == NULL
                           || vp->viewSubtreeLen > vpret->viewSubtreeLen
                           || (vp->viewSubtreeLen == vpret->viewSubtreeLen
                               && snmp_oid_compare(vp->viewSubtree + 1,
                                                   vp->viewSubtreeLen - 1,
                                                   vpret->viewSubtree + 1,
                                                   vpret->viewSubtreeLen - 1) >
                               0)) {
                    vpret = vp;
                }
            }
        }
    }

int
header_hrdisk(struct variable *vp,
	      oid *name,
	      size_t *length,
	      int exact,
	      size_t *var_len,
	      WriteMethod **write_method)
{
#define HRDISK_ENTRY_NAME_LENGTH	11
    oid newname[MAX_OID_LEN];
    int disk_idx, LowIndex = -1;
    int result;

    DEBUGMSGTL(("host/hr_disk", "var_hrdisk: "));
    DEBUGMSGOID(("host/hr_disk", name, *length));
    DEBUGMSG(("host/hr_disk"," %d\n", exact));
    
    memcpy( (char *)newname,(char *)vp->name, (int)vp->namelen * sizeof(oid));
	/* Find "next" disk entry */

    Init_HR_Disk();
    for ( ;; ) {
        disk_idx = Get_Next_HR_Disk();
        if ( disk_idx == -1 )
	    break;
	newname[HRDISK_ENTRY_NAME_LENGTH] = disk_idx;
        result = snmp_oid_compare(name, *length, newname, (int)vp->namelen + 1);
        if (exact && (result == 0)) {
	    LowIndex = disk_idx;
	    Save_HR_Disk_Specific();
            break;
	}
	if ((!exact && (result < 0)) &&
		( LowIndex == -1 ||  disk_idx < LowIndex )) {
	    LowIndex = disk_idx;
	    Save_HR_Disk_Specific();
#ifdef HRD_MONOTONICALLY_INCREASING
	    break;
#endif
        }
    }

    if ( LowIndex == -1 ) {
      DEBUGMSGTL(("host/hr_disk", "... index out of range\n"));
      return(MATCH_FAILED);
    }

    newname[HRDISK_ENTRY_NAME_LENGTH] = LowIndex;
    memcpy( (char *)name,(char *)newname, ((int)vp->namelen + 1) * sizeof(oid));
    *length = vp->namelen + 1;
    *write_method = 0;
    *var_len = sizeof(long);	/* default to 'long' results */

    DEBUGMSGTL(("host/hr_disk", "... get disk stats "));
    DEBUGMSGOID(("host/hr_disk", name, *length));
    DEBUGMSG(("host/hr_disk","\n"));
    
    return LowIndex;
}

/** compare a row with the given index OID */
int
netsnmp_tdata_compare_oid(netsnmp_tdata_row     *row,
                          oid * compareto, size_t compareto_len)
{
    netsnmp_index *index = (netsnmp_index *)row;
    return snmp_oid_compare( index->oids, index->len,
                             compareto,   compareto_len);
}

int
header_hrnet(struct variable *vp,
             oid * name,
             size_t * length,
             int exact, size_t * var_len, WriteMethod ** write_method)
{
#define HRNET_ENTRY_NAME_LENGTH	11
    oid             newname[MAX_OID_LEN];
    int             net_idx;
    int             result;
    int             LowIndex = -1;

    DEBUGMSGTL(("host/hr_network", "var_hrnet: "));
    DEBUGMSGOID(("host/hr_network", name, *length));
    DEBUGMSG(("host/hr_network", " %d\n", exact));

    memcpy((char *) newname, (char *) vp->name, vp->namelen * sizeof(oid));
    /*
     * Find "next" net entry 
     */

    Init_HR_Network();
    for (;;) {
        net_idx = Get_Next_HR_Network();
        if (net_idx == -1)
            break;
        newname[HRNET_ENTRY_NAME_LENGTH] = net_idx;
        result = snmp_oid_compare(name, *length, newname, vp->namelen + 1);
        if (exact && (result == 0)) {
            LowIndex = net_idx;
            break;
        }
        if (!exact && (result < 0) &&
            (LowIndex == -1 || net_idx < LowIndex)) {
            LowIndex = net_idx;
#ifdef HRN_MONOTONICALLY_INCREASING
            break;
#endif
        }
    }

    if (LowIndex == -1) {
        DEBUGMSGTL(("host/hr_network", "... index out of range\n"));
        return (MATCH_FAILED);
    }

    newname[HRNET_ENTRY_NAME_LENGTH] = LowIndex;
    memcpy((char *) name, (char *) newname,
           (vp->namelen + 1) * sizeof(oid));
    *length = vp->namelen + 1;
    *write_method = 0;
    *var_len = sizeof(long);    /* default to 'long' results */

    DEBUGMSGTL(("host/hr_network", "... get net stats "));
    DEBUGMSGOID(("host/hr_network", name, *length));
    DEBUGMSG(("host/hr_network", "\n"));
    return LowIndex;
}

int
header_hrfilesys(struct variable *vp,
                 oid * name,
                 size_t * length,
                 int exact, size_t * var_len, WriteMethod ** write_method)
{
#define HRFSYS_ENTRY_NAME_LENGTH	11
    oid             newname[MAX_OID_LEN];
    int             fsys_idx, LowIndex = -1;
    int             result;

    DEBUGMSGTL(("host/hr_filesys", "var_hrfilesys: "));
    DEBUGMSGOID(("host/hr_filesys", name, *length));
    DEBUGMSG(("host/hr_filesys", " %d\n", exact));

    memcpy((char *) newname, (char *) vp->name, vp->namelen * sizeof(oid));
    /*
     * Find "next" file system entry 
     */

    Init_HR_FileSys();
    for (;;) {
        fsys_idx = Get_Next_HR_FileSys();
        if (fsys_idx == -1)
            break;
        newname[HRFSYS_ENTRY_NAME_LENGTH] = fsys_idx;
        result = snmp_oid_compare(name, *length, newname, vp->namelen + 1);
        if (exact && (result == 0)) {
            LowIndex = fsys_idx;
            break;
        }
        if ((!exact && (result < 0)) &&
            (LowIndex == -1 || fsys_idx < LowIndex)) {
            LowIndex = fsys_idx;
#ifdef HRFS_MONOTONICALLY_INCREASING
            break;
#endif
        }
    }

    if (LowIndex == -1) {
        DEBUGMSGTL(("host/hr_filesys", "... index out of range\n"));
        return (MATCH_FAILED);
    }

    memcpy((char *) name, (char *) newname,
           (vp->namelen + 1) * sizeof(oid));
    *length = vp->namelen + 1;
    *write_method = (WriteMethod*)0;
    *var_len = sizeof(long);    /* default to 'long' results */

    DEBUGMSGTL(("host/hr_filesys", "... get filesys stats "));
    DEBUGMSGOID(("host/hr_filesys", name, *length));
    DEBUGMSG(("host/hr_filesys", "\n"));

    return LowIndex;
}