Ok, I figured it out.
Maybe my findings will come in handy to someone.
The code that is generated by mib2c with mib2c.iterate.conf style in
the _get_next_data_point
function there is a call to snmp_set_var_value( idx, entry->myIndex,
sizeof(entry->myIndex) ).
sizeof will not work with strings obviously.
changing it to entry->myIndex_len does the trick.
On Wed, Feb 11, 2015 at 11:35 AM, Mattias Barthel <mbart...@accedian.com>
wrote:
> I tried to do the same with an Unsigned32 index. And this worked fine.
>
> ENDPOINT-MGMT-MIB::endpointMgmtSEPIndex.1 = Gauge32: 1
> ENDPOINT-MGMT-MIB::endpointMgmtSEPIndex.2 = Gauge32: 2
> ENDPOINT-MGMT-MIB::endpointMgmtSEPName.1 = STRING: Actuator-1
> ENDPOINT-MGMT-MIB::endpointMgmtSEPName.2 = STRING: Actuator-2
> ENDPOINT-MGMT-MIB::endpointMgmtSEPState.1 = INTEGER: disconnected(1)
> ENDPOINT-MGMT-MIB::endpointMgmtSEPState.2 = INTEGER: connected(2)
>
> Are stringed indices supported?
> If so, is there something I might be missing?
>
>
> On Tue, Feb 10, 2015 at 7:03 PM, Mattias Barthel <mbart...@accedian.com>
> wrote:
>
>> Hey,
>>
>> From a mail conversation dug up from 2006,
>> I am trying to do exactly what Qiang was doing, namely initialise the
>> table just to test the mechanism.
>> My table has an OCTET_STRING as index.
>> I have this code:
>>
>> char *name, *endPointSEPName = "Endpoint-%d";
>> int i;
>> ............
>> /* Initialise the contents of the table here */
>> for (i = 0; i < 25; i++) {
>> name = (char*)malloc(20);
>> sprintf(name, endPointSEPName, i + 1);
>> endpointMgmtSEPTable_addEntry(name, strlen(name), (i % 5) + 1);
>> free(name);
>> }
>> ............
>> /* create a new row in the (unsorted) table */
>> struct endpointMgmtSEPTable_entry *
>> endpointMgmtSEPTable_addEntry(
>> char* endpointMgmtSEPName,
>> size_t endpointMgmtSEPName_len,
>> long endpointMgmtSEPState
>> ) {
>> struct endpointMgmtSEPTable_entry *entry;
>>
>> entry = SNMP_MALLOC_TYPEDEF(struct endpointMgmtSEPTable_entry);
>> if (!entry)
>> return NULL;
>>
>> memcpy(entry->endpointMgmtSEPName, endpointMgmtSEPName,
>> endpointMgmtSEPName_len);
>> entry->endpointMgmtSEPName_len = endpointMgmtSEPName_len;
>>
>> entry->endpointMgmtSEPState = endpointMgmtSEPState;
>>
>> entry->next = endpointMgmtSEPTable_head;
>> endpointMgmtSEPTable_head = entry;
>> entry->valid = 1;
>> return entry;
>> }
>>
>>
>> This aint working as I expected, though. I only get one row, i.e the last
>> one added to the table.
>> snmpwalk -v2c public <host> .1 | grep ENDPOINT
>> ENDPOINT-MGMT-MIB::endpointMgmtSEPName = STRING: Actuator-24
>> ENDPOINT-MGMT-MIB::endpointMgmtSEPState = INTEGER: upgradeonly(5)
>>
>>
>> I dont understand why.
>>
>> Please help.
>>
>>
>> Best regards,
>> Mattias
>>
>>
>> --
>>
>> 蔷<Qiang Hu>
>> <https://www.mail-archive.com/search?l=net-snmp-users@lists.sourceforge.net&q=from:%22%E8%94%B7%26lt%3BQiang+Hu%26gt%3B%22>
>> Fri, 11 Aug 2006 01:15:51 -0700
>> <https://www.mail-archive.com/search?l=net-snmp-users@lists.sourceforge.net&q=date:20060811>
>> i saw this routine and i'm pulzzled about "table_entry = (struct
>> tbModuleTable_entry *)netsnmp_extract_iterator_context(request);" it seems
>> that table_entry get relevant datas from this
>> netsnmp_extract_iterator_context;and how can i initial contents of table in
>> iterator.i can't understand the iterator operation mechanism. i saw an
>> exitent mib handler code of net-snmp which initials in this way
>> as following:
>>
>> iinfo->make_data_context = netSnmpHostsTable_context_convert_function;
>> iinfo->free_data_context = netSnmpHostsTable_data_free;
>> iinfo->free_loop_context_at_end = netSnmpHostsTable_loop_free;
>>
>> is there any examples mibs for how to modify the generater code by
>> mib2c.iterate.conf?
>>
>> that's my generated code for my mib(not modified),can you tell me how to
>> set the datas of table?
>>
>> /*
>> * Note: this file originally auto-generated by mib2c using
>> * : mib2c.iterate.conf,v 5.17 2005/05/09 08:13:45 dts12 Exp $
>> */
>>
>> #include <net-snmp/net-snmp-config.h>
>> #include <net-snmp/net-snmp-includes.h>
>> #include <net-snmp/agent/net-snmp-agent-includes.h>
>> #include "tb.h"
>>
>> /** Initializes the tb module */
>> void
>> init_tb(void)
>> {
>> /*
>> * here we initialize all the tables we're planning on supporting
>> */
>> initialize_table_tbModuleTable();
>> initialize_table_tbHwVersionTable();
>> }
>>
>> /** Initialize the tbModuleTable table by defining its contents and how
>> it's structured */
>> void
>> initialize_table_tbModuleTable(void)
>> {
>> static oid tbModuleTable_oid[] =
>> { 1, 3, 6, 1, 4, 1, 21776, 1, 1 };
>> size_t tbModuleTable_oid_len = OID_LENGTH(tbModuleTable_oid);
>> netsnmp_handler_registration *reg;
>> netsnmp_iterator_info *iinfo;
>> netsnmp_table_registration_info *table_info;
>>
>> reg =
>> netsnmp_create_handler_registration("tbModuleTable",
>> tbModuleTable_handler,
>> tbModuleTable_oid,
>> tbModuleTable_oid_len,
>> HANDLER_CAN_RWRITE);
>>
>> table_info = SNMP_MALLOC_TYPEDEF(netsnmp_table_registration_info);
>> netsnmp_table_helper_add_indexes(table_info, ASN_INTEGER, /* index:
>> tbModuleIndex */
>> 0);
>> table_info->min_column = XXX;
>> table_info->max_column = YYY;
>>
>> iinfo = SNMP_MALLOC_TYPEDEF(netsnmp_iterator_info);
>> iinfo->get_first_data_point = tbModuleTable_get_first_data_point;
>> iinfo->get_next_data_point = tbModuleTable_get_next_data_point;
>> iinfo->table_reginfo = table_info;
>>
>> netsnmp_register_table_iterator(reg, iinfo);
>>
>> /*
>> * Initialise the contents of the table here
>> */
>> }
>>
>> /*
>> * Typical data structure for a row entry
>> */
>> struct tbModuleTable_entry {
>> /*
>> * Index values
>> */
>> long tbModuleIndex;
>>
>> /*
>> * Column values
>> */
>> long tbModuleIndex;
>> u_long tbModuleID;
>> char tbModuleDescription;
>> char old_tbModuleDescription;
>>
>> /*
>> * Illustrate using a simple linked list
>> */
>> int valid;
>> struct tbModuleTable_entry *next;
>> };
>>
>> struct tbModuleTable_entry *tbModuleTable_head;
>>
>> /*
>> * create a new row in the (unsorted) table
>> */
>> struct tbModuleTable_entry *
>> tbModuleTable_createEntry(long tbModuleIndex,)
>> {
>> struct tbModuleTable_entry *entry;
>>
>> entry = SNMP_MALLOC_TYPEDEF(struct tbModuleTable_entry);
>> if (!entry)
>> return NULL;
>>
>> entry->tbModuleIndex = tbModuleIndex;
>> entry->next = tbModuleTable_head;
>> tbModuleTable_head = entry;
>> return entry;
>> }
>>
>> /*
>> * remove a row from the table
>> */
>> void
>> tbModuleTable_removeEntry(struct tbModuleTable_entry *entry)
>> {
>> struct tbModuleTable_entry *ptr, *prev;
>>
>> if (!entry)
>> return; /* Nothing to remove */
>>
>> for (ptr = tbModuleTable_head, prev = NULL;
>> ptr != NULL; prev = ptr, ptr = ptr->next) {
>> if (ptr == entry)
>> break;
>> }
>> if (!ptr)
>> return; /* Can't find it */
>>
>> if (prev == NULL)
>> tbModuleTable_head = ptr->next;
>> else
>> prev->next = ptr->next;
>>
>> SNMP_FREE(entry); /* XXX - release any other internal
>> resources */
>> }
>>
>>
>> /*
>> * Example iterator hook routines - using 'get_next' to do most of the
>> work
>> */
>> netsnmp_variable_list *
>> tbModuleTable_get_first_data_point(void **my_loop_context,
>> void **my_data_context,
>> netsnmp_variable_list * put_index_data,
>> netsnmp_iterator_info *mydata)
>> {
>> *my_loop_context = tbModuleTable_head;
>> return tbModuleTable_get_next_data_point(my_loop_context,
>> my_data_context,
>> put_index_data, mydata);
>> }
>>
>> netsnmp_variable_list *
>> tbModuleTable_get_next_data_point(void **my_loop_context,
>> void **my_data_context,
>> netsnmp_variable_list * put_index_data,
>> netsnmp_iterator_info *mydata)
>> {
>> struct tbModuleTable_entry *entry =
>> (struct tbModuleTable_entry *) *my_loop_context;
>> netsnmp_variable_list *idx = put_index_data;
>>
>> if (entry) {
>> snmp_set_var_value(idx, entry->tbModuleIndex,
>> sizeof(entry->tbModuleIndex));
>> idx = idx->next_variable;
>> *my_data_context = (void *) entry;
>> *my_loop_context = (void *) entry->next;
>> } else {
>> return NULL;
>> }
>> }
>>
>>
>> /** handles requests for the tbModuleTable table */
>> int
>> tbModuleTable_handler(netsnmp_mib_handler *handler,
>> netsnmp_handler_registration *reginfo,
>> netsnmp_agent_request_info *reqinfo,
>> netsnmp_request_info *requests)
>> {
>>
>> netsnmp_request_info *request;
>> netsnmp_table_request_info *table_info;
>> struct tbModuleTable_entry *table_entry;
>>
>> switch (reqinfo->mode) {
>> /*
>> * Read-support (also covers GetNext requests)
>> */
>> case MODE_GET:
>> for (request = requests; request; request = request->next) {
>> table_entry = (struct tbModuleTable_entry *)
>> netsnmp_extract_iterator_context(request);
>> table_info = netsnmp_extract_table_info(request);
>>
>> switch (table_info->colnum) {
>> case COLUMN_TBMODULEINDEX:
>> snmp_set_var_typed_value(request->requestvb, ASN_INTEGER,
>> table_entry->tbModuleIndex,
>> sizeof(table_entry->
>> tbModuleIndex));
>> break;
>> case COLUMN_TBMODULEID:
>> snmp_set_var_typed_value(request->requestvb,
>> ASN_UNSIGNED,
>> table_entry->tbModuleID,
>> sizeof(table_entry->tbModuleID));
>> break;
>> case COLUMN_TBMODULEDESCRIPTION:
>> snmp_set_var_typed_value(request->requestvb,
>> ASN_OCTET_STR,
>> table_entry->tbModuleDescription,
>> sizeof(table_entry->
>> tbModuleDescription));
>> break;
>> }
>> }
>> break;
>>
>> /*
>> * Write-support
>> */
>> case MODE_SET_RESERVE1:
>> for (request = requests; request; request = request->next) {
>> table_entry = (struct tbModuleTable_entry *)
>> netsnmp_extract_iterator_context(request);
>> table_info = netsnmp_extract_table_info(request);
>>
>> switch (table_info->colnum) {
>> case COLUMN_TBMODULEDESCRIPTION:
>> if (request->requestvb->type != ASN_OCTET_STR) {
>> netsnmp_set_request_error(reqinfo, request,
>> SNMP_ERR_WRONGTYPE);
>> return SNMP_ERR_NOERROR;
>> }
>> /*
>> * Also may need to check size/value
>> */
>> break;
>> default:
>> netsnmp_set_request_error(reqinfo, request,
>> SNMP_ERR_NOTWRITABLE);
>> return SNMP_ERR_NOERROR;
>> }
>> }
>> break;
>>
>> case MODE_SET_RESERVE2:
>> break;
>>
>> case MODE_SET_FREE:
>> break;
>>
>> case MODE_SET_ACTION:
>> for (request = requests; request; request = request->next) {
>> table_entry = (struct tbModuleTable_entry *)
>> netsnmp_extract_iterator_context(request);
>> table_info = netsnmp_extract_table_info(request);
>>
>> switch (table_info->colnum) {
>> case COLUMN_TBMODULEDESCRIPTION:
>> /*
>> * Need to save old 'table_entry->tbModuleDescription'
>> value.
>> * May need to use 'memcpy'
>> */
>> table_entry->old_tbModuleDescription =
>> table_entry->tbModuleDescription;
>> table_entry->tbModuleDescription =
>> request->requestvb-> val.YYY;
>> break;
>> }
>> }
>> break;
>>
>> case MODE_SET_UNDO:
>> for (request = requests; request; request = request->next) {
>> table_entry = (struct tbModuleTable_entry *)
>> netsnmp_extract_iterator_context(request);
>> table_info = netsnmp_extract_table_info(request);
>>
>> switch (table_info->colnum) {
>> case COLUMN_TBMODULEDESCRIPTION:
>> /*
>> * Need to restore old 'table_entry->tbModuleDescription'
>> value.
>> * May need to use 'memcpy'
>> */
>> table_entry->tbModuleDescription =
>> table_entry->old_tbModuleDescription;
>> break;
>> }
>> }
>> break;
>>
>> case MODE_SET_COMMIT:
>> break;
>> }
>> return SNMP_ERR_NOERROR;
>> }
>>
>> thanks in advance !
>>
>>
>>
>> On 8/10/06, Dave Shield <[EMAIL PROTECTED]> wrote:
>>>
>>> On 10/08/06, qiang<Qiang Hu> <[EMAIL PROTECTED]> wrote:
>>> > I generated mib2c files by mib2c.conf also with iterator option.and
>>> now i
>>> > wanted to know how to Initialise the contents of the table
>>>
>>> If you look at the generated code, you should see a routine
>>> 'tbModuleTable_createEntry()'. Call this with the relevant values for
>>> each row you wish to create.
>>>
>>> The only unexpected thing is you'll need to explicitly set the 'valid'
>>> flag for each row.
>>> Something like:
>>>
>>> struct tbModuleTable_entry *entry;
>>>
>>> entry = tbModuleTable_createEntry(1, 256, "eenie");
>>> entry->valid = 1;
>>> entry = tbModuleTable_createEntry(3, 128, "meenie");
>>> entry->valid = 1;
>>> entry = tbModuleTable_createEntry(4, 64, "mynie");
>>> entry->valid = 1;
>>> entry = tbModuleTable_createEntry(2, 32, "mo");
>>> entry->valid = 1;
>>>
>>>
>>> Dave
>>>
>>
>>
>
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