/**
* marks a given column in a row as writable or not.
*/
int
netsnmp_mark_row_column_writable(netsnmp_table_row *row, int column,
int writable)
{
netsnmp_table_data_set_storage *data;
if (!row)
return SNMPERR_GENERR;
data = (netsnmp_table_data_set_storage *) row->data;
data = netsnmp_table_data_set_find_column(data, column);
if (!data) {
/*
* create it
*/
data = SNMP_MALLOC_TYPEDEF(netsnmp_table_data_set_storage);
if (!data) {
snmp_log(LOG_CRIT, "no memory in netsnmp_set_row_column");
return SNMPERR_MALLOC;
}
data->column = column;
data->writable = writable;
data->next = row->data;
row->data = data;
} else {
data->writable = writable;
}
return SNMPERR_SUCCESS;
}
/** adds a new default row to a table_set.
* Arguments should be the table_set, column number, variable type and
* finally a 1 if it is allowed to be writable, or a 0 if not. If the
* default_value field is not NULL, it will be used to populate new
* valuse in that column fro newly created rows. It is copied into the
* storage template (free your calling argument).
*
* returns SNMPERR_SUCCESS or SNMPERR_FAILURE
*/
int
netsnmp_table_set_add_default_row(netsnmp_table_data_set *table_set,
unsigned int column,
int type, int writable,
void *default_value,
size_t default_value_len)
{
netsnmp_table_data_set_storage *new_col, *ptr, *pptr;
if (!table_set)
return SNMPERR_GENERR;
/*
* double check
*/
new_col =
netsnmp_table_data_set_find_column(table_set->default_row, column);
if (new_col != NULL) {
if (new_col->type == type && new_col->writable == writable)
return SNMPERR_SUCCESS;
return SNMPERR_GENERR;
}
new_col = SNMP_MALLOC_TYPEDEF(netsnmp_table_data_set_storage);
if (new_col == NULL)
return SNMPERR_GENERR;
new_col->type = type;
new_col->writable = writable;
new_col->column = column;
if (default_value) {
memdup((u_char **) & (new_col->data.voidp),
(u_char *) default_value, default_value_len);
new_col->data_len = default_value_len;
}
if (table_set->default_row == NULL)
table_set->default_row = new_col;
else {
/* sort in order just because (needed for add_row support) */
for (ptr = table_set->default_row, pptr = NULL;
ptr;
pptr = ptr, ptr = ptr->next) {
if (ptr->column > column) {
new_col->next = ptr;
if (pptr)
pptr->next = new_col;
else
table_set->default_row = new_col;
return SNMPERR_SUCCESS;
}
}
if (pptr)
pptr->next = new_col;
else
snmp_log(LOG_ERR,"Shouldn't have gotten here: table_dataset/add_row");
}
return SNMPERR_SUCCESS;
}
/**
* extracts a netsnmp_table_data_set pointer from a given request
*/
netsnmp_table_data_set_storage *
netsnmp_extract_table_data_set_column(netsnmp_request_info *request,
unsigned int column)
{
netsnmp_table_data_set_storage *data =
netsnmp_extract_table_row_data( request );
if (data) {
data = netsnmp_table_data_set_find_column(data, column);
}
return data;
}
/**
* Sets a given column in a row with data given a type, value,
* and length. Data is memdup'ed by the function, at least if
* type != SNMP_NOSUCHINSTANCE and if value_len > 0.
*
* @param[in] row Pointer to the row to be modified.
* @param[in] column Index of the column to be modified.
* @param[in] type Either the ASN type of the value to be set or
* SNMP_NOSUCHINSTANCE.
* @param[in] value If type != SNMP_NOSUCHINSTANCE, pointer to the
* new value. May be NULL if value_len == 0, e.g. when storing a
* zero-length octet string. Ignored when type == SNMP_NOSUCHINSTANCE.
* @param[in] value_len If type != SNMP_NOSUCHINSTANCE, number of bytes
* occupied by *value. Ignored when type == SNMP_NOSUCHINSTANCE.
*
* @return SNMPERR_SUCCESS upon success; SNMPERR_MALLOC when out of memory;
* or SNMPERR_GENERR when row == 0 or when type does not match the datatype
* of the data stored in *row.
*
*/
int
netsnmp_set_row_column(netsnmp_table_row *row, unsigned int column,
int type, const void *value, size_t value_len)
{
netsnmp_table_data_set_storage *data;
if (!row)
return SNMPERR_GENERR;
data = (netsnmp_table_data_set_storage *) row->data;
data = netsnmp_table_data_set_find_column(data, column);
if (!data) {
/*
* create it
*/
data = SNMP_MALLOC_TYPEDEF(netsnmp_table_data_set_storage);
if (!data) {
snmp_log(LOG_CRIT, "no memory in netsnmp_set_row_column");
return SNMPERR_MALLOC;
}
data->column = column;
data->type = type;
data->next = (struct netsnmp_table_data_set_storage_s*)row->data;
row->data = data;
}
/* Transitions from / to SNMP_NOSUCHINSTANCE are allowed, but no other transitions. */
if (data->type != type && data->type != SNMP_NOSUCHINSTANCE
&& type != SNMP_NOSUCHINSTANCE)
return SNMPERR_GENERR;
/* Return now if neither the type nor the data itself has been modified. */
if (data->type == type && data->data_len == value_len
&& (value == NULL || memcmp(&data->data.string, value, value_len) == 0))
return SNMPERR_SUCCESS;
/* Reallocate memory and store the new value. */
data->data.voidp = realloc(data->data.voidp, value ? value_len : 0);
if (value && value_len && !data->data.voidp) {
data->data_len = 0;
data->type = SNMP_NOSUCHINSTANCE;
snmp_log(LOG_CRIT, "no memory in netsnmp_set_row_column");
return SNMPERR_MALLOC;
}
if (value && value_len)
memcpy(data->data.string, value, value_len);
data->type = type;
data->data_len = value_len;
return SNMPERR_SUCCESS;
}
/**
* sets a given column in a row with data given a type, value, and
* length. Data is memdup'ed by the function.
*/
int
netsnmp_set_row_column(netsnmp_table_row *row, unsigned int column,
int type, const char *value, size_t value_len)
{
netsnmp_table_data_set_storage *data;
if (!row)
return SNMPERR_GENERR;
data = (netsnmp_table_data_set_storage *) row->data;
data = netsnmp_table_data_set_find_column(data, column);
if (!data) {
/*
* create it
*/
data = SNMP_MALLOC_TYPEDEF(netsnmp_table_data_set_storage);
if (!data) {
snmp_log(LOG_CRIT, "no memory in netsnmp_set_row_column");
return SNMPERR_MALLOC;
}
data->column = column;
data->type = type;
data->next = row->data;
row->data = data;
}
if (value) {
if (data->type != type)
return SNMPERR_GENERR;
SNMP_FREE(data->data.voidp);
if (value_len) {
if (memdup(&data->data.string, value, (value_len)) !=
SNMPERR_SUCCESS) {
snmp_log(LOG_CRIT, "no memory in netsnmp_set_row_column");
return SNMPERR_MALLOC;
}
} else {
data->data.string = malloc(1);
}
data->data_len = value_len;
}
return SNMPERR_SUCCESS;
}
/*
* send trap
*/
void
run_mte_events(struct mteTriggerTable_data *item,
oid * name_oid, size_t name_oid_len,
const char *eventobjowner, const char *eventobjname)
{
static oid objid_snmptrap[] = { 1, 3, 6, 1, 6, 3, 1, 1, 4, 1, 0 }; /* snmpTrapIOD.0 */
netsnmp_variable_list *var_list = NULL;
netsnmp_table_row *row, *notif_row;
netsnmp_table_data_set_storage *col1, *tc, *no, *noo;
for(row = table_set->table->first_row; row; row = row->next) {
if (strcmp(row->indexes->val.string, eventobjowner) == 0 &&
strcmp(row->indexes->next_variable->val.string,
eventobjname) == 0) {
/* run this event */
col1 = (netsnmp_table_data_set_storage *) row->data;
tc = netsnmp_table_data_set_find_column(col1,
COLUMN_MTEEVENTACTIONS);
if (!tc->data.bitstring[0] & 0x80) {
/* not a notification. next! (XXX: do sets) */
continue;
}
tc = netsnmp_table_data_set_find_column(col1,
COLUMN_MTEEVENTENABLED);
if (*(tc->data.integer) != 1) {
/* not enabled. next! */
continue;
}
if (!mteEventNotif_table_set) {
/* no notification info */
continue;
}
/* send the notification */
var_list = NULL;
/* XXX: get notif information */
for(notif_row = mteEventNotif_table_set->table->first_row;
notif_row; notif_row = notif_row->next) {
if (strcmp(notif_row->indexes->val.string,
eventobjowner) == 0 &&
strcmp(notif_row->indexes->next_variable->val.string,
eventobjname) == 0) {
/* run this event */
col1 = (netsnmp_table_data_set_storage *) notif_row->data;
tc = netsnmp_table_data_set_find_column(col1, COLUMN_MTEEVENTNOTIFICATION);
no = netsnmp_table_data_set_find_column(col1, COLUMN_MTEEVENTNOTIFICATIONOBJECTS);
noo = netsnmp_table_data_set_find_column(col1, COLUMN_MTEEVENTNOTIFICATIONOBJECTSOWNER);
if (!tc)
continue; /* no notification to be had. XXX: return? */
/*
* snmpTrap oid
*/
snmp_varlist_add_variable(&var_list, objid_snmptrap,
sizeof(objid_snmptrap) /
sizeof(oid),
ASN_OBJECT_ID,
(u_char *) tc->data.objid,
tc->data_len);
/* XXX: add objects from the mteObjectsTable */
DEBUGMSGTL(("mteEventTable:send_events", "no: %x, no->data: %s", no, no->data.string));
DEBUGMSGTL(("mteEventTable:send_events", "noo: %x, noo->data: %s", noo, noo->data.string));
DEBUGMSGTL(("mteEventTable:send_events", "name_oid: %x",name_oid));
if (no && no->data.string &&
noo && noo->data.string && name_oid) {
char *tmpowner =
netsnmp_strdup_and_null(noo->data.string,
noo->data_len);
char *tmpname =
netsnmp_strdup_and_null(no->data.string,
no->data_len);
DEBUGMSGTL(("mteEventTable:send_events", "Adding objects for owner=%s name=%s", tmpowner, tmpname));
mte_add_objects(var_list, item,
tmpowner, tmpname,
name_oid + item->mteTriggerValueIDLen,
name_oid_len - item->mteTriggerValueIDLen);
free(tmpowner);
free(tmpname);
}
DEBUGMSGTL(("mteEventTable:send_events", "sending an event "));
DEBUGMSGOID(("mteEventTable:send_events", tc->data.objid, tc->data_len / sizeof(oid)));
DEBUGMSG(("mteEventTable:send_events", "\n"));
send_v2trap(var_list);
snmp_free_varbind(var_list);
}
}
}
}
}
/** implements the table data helper. This is the routine that takes
* care of all SNMP requests coming into the table. */
int
netsnmp_table_data_set_helper_handler(netsnmp_mib_handler *handler,
netsnmp_handler_registration
*reginfo,
netsnmp_agent_request_info *reqinfo,
netsnmp_request_info *requests)
{
netsnmp_table_data_set_storage *data = NULL;
newrow_stash *newrowstash = NULL;
netsnmp_table_row *row, *newrow = NULL;
netsnmp_table_request_info *table_info;
netsnmp_request_info *request;
oid *suffix;
size_t suffix_len;
netsnmp_oid_stash_node **stashp = NULL;
if (!handler)
return SNMPERR_GENERR;
DEBUGMSGTL(("netsnmp_table_data_set", "handler starting\n"));
for (request = requests; request; request = request->next) {
netsnmp_table_data_set *datatable =
(netsnmp_table_data_set *) handler->myvoid;
if (request->processed)
continue;
/*
* extract our stored data and table info
*/
row = netsnmp_extract_table_row(request);
table_info = netsnmp_extract_table_info(request);
suffix = requests->requestvb->name + reginfo->rootoid_len + 2;
suffix_len = requests->requestvb->name_length -
(reginfo->rootoid_len + 2);
if (MODE_IS_SET(reqinfo->mode)) {
char buf[256]; /* is this reasonable size?? */
int rc;
size_t len;
/*
* use a cached copy of the row for modification
*/
/*
* cache location: may have been created already by other
* SET requests in the same master request.
*/
rc = snprintf(buf, sizeof(buf), "dataset_row_stash:%s:",
datatable->table->name);
if ((-1 == rc) || (rc >= sizeof(buf))) {
snmp_log(LOG_ERR,"%s handler name too long\n",
datatable->table->name);
netsnmp_set_request_error(reqinfo, request,
SNMP_ERR_GENERR);
continue;
}
len = sizeof(buf) - rc;
rc = snprint_objid(&buf[rc], len, table_info->index_oid,
table_info->index_oid_len);
if (-1 == rc) {
snmp_log(LOG_ERR,"%s oid or name too long\n",
datatable->table->name);
netsnmp_set_request_error(reqinfo, request,
SNMP_ERR_GENERR);
continue;
}
stashp = (netsnmp_oid_stash_node **)
netsnmp_table_get_or_create_row_stash(reqinfo, buf);
newrowstash
= netsnmp_oid_stash_get_data(*stashp, suffix, suffix_len);
if (!newrowstash) {
if (!row) {
if (datatable->allow_creation) {
/*
* entirely new row. Create the row from the template
*/
newrowstash =
netsnmp_table_data_set_create_newrowstash(
datatable, table_info);
newrow = newrowstash->newrow;
} else if (datatable->rowstatus_column == 0) {
/*
* A RowStatus object may be used to control the
* creation of a new row. But if this object
* isn't declared (and the table isn't marked as
* 'auto-create'), then we can't create a new row.
*/
netsnmp_set_request_error(reqinfo, request,
SNMP_ERR_NOCREATION);
continue;
}
} else {
/*
* existing row that needs to be modified
*/
newrowstash = SNMP_MALLOC_TYPEDEF(newrow_stash);
newrow = netsnmp_table_data_set_clone_row(row);
newrowstash->newrow = newrow;
}
netsnmp_oid_stash_add_data(stashp, suffix, suffix_len,
newrowstash);
} else {
newrow = newrowstash->newrow;
}
/*
* all future SET data modification operations use this
* temp pointer
*/
if (reqinfo->mode == MODE_SET_RESERVE1 ||
reqinfo->mode == MODE_SET_RESERVE2)
row = newrow;
}
if (row)
data = (netsnmp_table_data_set_storage *) row->data;
if (!row || !table_info || !data) {
if (!MODE_IS_SET(reqinfo->mode)) {
netsnmp_set_request_error(reqinfo, request,
SNMP_NOSUCHINSTANCE);
continue;
}
}
data =
netsnmp_table_data_set_find_column(data, table_info->colnum);
switch (reqinfo->mode) {
case MODE_GET:
case MODE_GETNEXT:
case MODE_GETBULK: /* XXXWWW */
if (data && data->data.voidp)
netsnmp_table_data_build_result(reginfo, reqinfo, request,
row,
table_info->colnum,
data->type,
data->data.voidp,
data->data_len);
break;
case MODE_SET_RESERVE1:
if (data) {
/*
* Can we modify the existing row?
*/
if (!data->writable) {
netsnmp_set_request_error(reqinfo, request,
SNMP_ERR_NOTWRITABLE);
} else if (request->requestvb->type != data->type) {
netsnmp_set_request_error(reqinfo, request,
SNMP_ERR_WRONGTYPE);
}
} else if (datatable->rowstatus_column == table_info->colnum) {
/*
* Otherwise, this is where we create a new row using
* the RowStatus object (essentially duplicating the
* steps followed earlier in the 'allow_creation' case)
*/
switch (*(request->requestvb->val.integer)) {
case RS_CREATEANDGO:
case RS_CREATEANDWAIT:
newrowstash =
netsnmp_table_data_set_create_newrowstash(
datatable, table_info);
newrow = newrowstash->newrow;
row = newrow;
netsnmp_oid_stash_add_data(stashp, suffix, suffix_len,
newrowstash);
}
}
break;
case MODE_SET_RESERVE2:
/*
* If the agent receives a SET request for an object in a non-existant
* row, then the RESERVE1 pass will create the row automatically.
*
* But since the row doesn't exist at that point, the test for whether
* the object is writable or not will be skipped. So we need to check
* for this possibility again here.
*
* Similarly, if row creation is under the control of the RowStatus
* object (i.e. allow_creation == 0), but this particular request
* doesn't include such an object, then the row won't have been created,
* and the writable check will also have been skipped. Again - check here.
*/
if (data && data->writable == 0) {
netsnmp_set_request_error(reqinfo, request,
SNMP_ERR_NOTWRITABLE);
continue;
}
if (datatable->rowstatus_column == table_info->colnum) {
switch (*(request->requestvb->val.integer)) {
case RS_ACTIVE:
case RS_NOTINSERVICE:
/*
* Can only operate on pre-existing rows.
*/
if (!newrowstash || newrowstash->created) {
netsnmp_set_request_error(reqinfo, request,
SNMP_ERR_INCONSISTENTVALUE);
continue;
}
break;
case RS_CREATEANDGO:
case RS_CREATEANDWAIT:
/*
* Can only operate on newly created rows.
*/
if (!(newrowstash && newrowstash->created)) {
netsnmp_set_request_error(reqinfo, request,
SNMP_ERR_INCONSISTENTVALUE);
continue;
}
break;
case RS_DESTROY:
/*
* Can operate on new or pre-existing rows.
*/
break;
case RS_NOTREADY:
default:
/*
* Not a valid value to Set
*/
netsnmp_set_request_error(reqinfo, request,
SNMP_ERR_WRONGVALUE);
continue;
}
}
if (!data ) {
netsnmp_set_request_error(reqinfo, request,
SNMP_ERR_NOCREATION);
continue;
}
/*
* modify row and set new value
*/
SNMP_FREE(data->data.string);
data->data.string =
netsnmp_strdup_and_null(request->requestvb->val.string,
request->requestvb->val_len);
if (!data->data.string) {
netsnmp_set_request_error(reqinfo, requests,
SNMP_ERR_RESOURCEUNAVAILABLE);
}
data->data_len = request->requestvb->val_len;
if (datatable->rowstatus_column == table_info->colnum) {
switch (*(request->requestvb->val.integer)) {
case RS_CREATEANDGO:
/*
* XXX: check legality
*/
*(data->data.integer) = RS_ACTIVE;
break;
case RS_CREATEANDWAIT:
/*
* XXX: check legality
*/
*(data->data.integer) = RS_NOTINSERVICE;
break;
case RS_DESTROY:
newrowstash->deleted = 1;
break;
}
}
break;
case MODE_SET_ACTION:
/*
* Install the new row into the stored table.
* Do this only *once* per row ....
*/
if (newrowstash->state != STATE_ACTION) {
newrowstash->state = STATE_ACTION;
if (newrowstash->created) {
netsnmp_table_dataset_add_row(datatable, newrow);
} else {
netsnmp_table_dataset_replace_row(datatable,
row, newrow);
}
}
/*
* ... but every (relevant) varbind in the request will
* need to know about this new row, so update the
* per-request row information regardless
*/
if (newrowstash->created) {
netsnmp_request_add_list_data(request,
netsnmp_create_data_list(TABLE_DATA_NAME,
newrow, NULL));
}
break;
case MODE_SET_UNDO:
/*
* extract the new row, replace with the old or delete
*/
if (newrowstash->state != STATE_UNDO) {
newrowstash->state = STATE_UNDO;
if (newrowstash->created) {
netsnmp_table_dataset_remove_and_delete_row(datatable, newrow);
} else {
netsnmp_table_dataset_replace_row(datatable,
newrow, row);
netsnmp_table_dataset_delete_row(newrow);
}
}
break;
case MODE_SET_COMMIT:
if (newrowstash->state != STATE_COMMIT) {
newrowstash->state = STATE_COMMIT;
if (!newrowstash->created) {
netsnmp_table_dataset_delete_row(row);
}
if (newrowstash->deleted) {
netsnmp_table_dataset_remove_and_delete_row(datatable, newrow);
}
}
break;
case MODE_SET_FREE:
if (newrowstash && newrowstash->state != STATE_FREE) {
newrowstash->state = STATE_FREE;
netsnmp_table_dataset_delete_row(newrow);
}
break;
}
}
/* next handler called automatically - 'AUTO_NEXT' */
return SNMP_ERR_NOERROR;
}
void
check_log_size(unsigned int clientreg, void *clientarg)
{
netsnmp_table_row *row, *deleterow, *tmprow, *deletevarrow;
netsnmp_table_data_set_storage *data;
u_long count = 0;
struct timeval now;
long tmpl;
gettimeofday(&now, NULL);
tmpl = netsnmp_timeval_uptime(&now);
for (row = nlmLogTable->table->first_row; row; row = row->next) {
/*
* check max allowed count
*/
count++;
if (max_logged && count == max_logged)
break;
/*
* check max age
*/
data = (netsnmp_table_data_set_storage *) row->data;
data = netsnmp_table_data_set_find_column(data, COLUMN_NLMLOGTIME);
if (max_age && tmpl > (*(data->data.integer) + max_age * 100 * 60))
break;
}
if (!row)
return;
/*
* we've reached the limit, so keep looping but start deleting
* from the beginning
*/
for (deleterow = nlmLogTable->table->first_row, row = row->next; row;
row = row->next) {
DEBUGMSGTL(("notification_log", "deleting a log entry\n"));
/*
* delete contained varbinds
*/
for (deletevarrow = nlmLogVarTable->table->first_row;
deletevarrow; deletevarrow = tmprow) {
tmprow = deletevarrow->next;
if (deleterow->index_oid_len ==
deletevarrow->index_oid_len - 1 &&
snmp_oid_compare(deleterow->index_oid,
deleterow->index_oid_len,
deletevarrow->index_oid,
deleterow->index_oid_len) == 0) {
netsnmp_table_dataset_remove_and_delete_row(nlmLogVarTable,
deletevarrow);
}
}
/*
* delete the master row
*/
tmprow = deleterow->next;
netsnmp_table_dataset_remove_and_delete_row(nlmLogTable,
deleterow);
deleterow = tmprow;
num_deleted++;
/*
* XXX: delete vars from it's table
*/
}
}
