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- ########################################################################
- ## generic include for XXX. Do not use directly.
- ## $Id: mfd-persistence.m2i 15990 2007-03-23 09:19:51Z dts12 $
- ########################################################################
- @if $m2c_mark_boundary == 1@
- /** START code generated by $RCSfile$ $Revision: 15990 $ */
- @end@
- ########################################################################
- @if $m2c_processing_type eq 'h'@
- /* *********************************************************************
- * Persistent declarations
- */
- /*
- * persistence
- */
- #define LINE_TERM_CHAR '$'
-
- void ${context}_container_init_persistence( netsnmp_container * container );
- int ${context}_container_should_save(${context}_rowreq_ctx * rowreq_ctx);
-
- @end@ // m2c_processing_type eq 'h'
- ######################################################################
- ######################################################################
- ######################################################################
- @if $m2c_processing_type eq 'c'@
- /************************************************************
- * the *_should_save routine is called to determine if a row
- * should be stored persistently.
- *
- * Note that this is not a 'dirty' check (i.e. if a row has changed),
- * but a check for volatile rows that should not be saved between
- * restarts.
- *
- * return 1 if the row should be stored
- * return 0 if the row should not be stored
- */
- int
- ${context}_container_should_save(${context}_rowreq_ctx * rowreq_ctx)
- {
- @ foreach $node column@
- @ if "$node.syntax" eq "StorageType"@
- @ include m2c_setup_node.m2i@
- if (SNMP_STORAGE_VOLATILE == $m2c_ctx_rh )
- return 0;
- @ end@
- @ end@
-
- return 1; /* save the row */
- }
-
- @end@ // m2c_processing_type eq 'h'
- ######################################################################
- ######################################################################
- ######################################################################
- @if $m2c_processing_type eq 'i'@
- /***********************************************************************
- *
- * PERSISTENCE
- *
- ***********************************************************************/
-
- static int _${context}_container_save_rows(int majorID, int minorID, void *serverarg, void *clientarg);
- static void _${context}_container_row_restore(const char *token, char *buf);
- static int _${context}_container_row_save(
- ${context}_rowreq_ctx *rowreq_ctx,
- void *type);
- static char * _${context}_container_col_restore(
- ${context}_rowreq_ctx *rowreq_ctx,
- u_int col, char* buf);
- static char * _${context}_container_col_save(
- ${context}_rowreq_ctx *rowreq_ctx,
- u_int col, char* buf);
-
- static char row_token[] = "${context}";
-
- /************************************************************
- * *_init_persistence should be called from the main table
- * init routine.
- *
- * If your table depends on rows in another table,
- * you should register your callback after the other table,
- * which should ensure the rows on which you depend are saved
- * (and re-created) before the dependent rows.
- */
- void
- ${context}_container_init_persistence( netsnmp_container * container )
- {
- int rc;
-
- register_config_handler(NULL, row_token,
- _${context}_container_row_restore, NULL, NULL);
- rc = snmp_register_callback( SNMP_CALLBACK_LIBRARY,
- SNMP_CALLBACK_STORE_DATA,
- _${context}_container_save_rows,
- container);
-
- if( rc != SNMP_ERR_NOERROR )
- snmp_log(LOG_ERR, "error registering for STORE_DATA callback "
- "in _${context}_container_init_persistence\n");
- }
-
- static int
- _${context}_container_save_rows(int majorID, int minorID, void *serverarg, void *clientarg)
- {
- char sep[] =
- "##############################################################";
- char buf[] =
- "#\n"
- "# $context persistent data\n"
- "#";
- char *type = netsnmp_ds_get_string(NETSNMP_DS_LIBRARY_ID,
- NETSNMP_DS_LIB_APPTYPE);
-
- read_config_store((char*)type, sep);
- read_config_store((char*)type, buf);
-
- /*
- * save all rows
- */
- CONTAINER_FOR_EACH((netsnmp_container*)clientarg,
- (netsnmp_container_obj_func*)_${context}_container_row_save,
- type);
-
- read_config_store((char*)type, sep);
- read_config_store((char*)type, "\n");
-
- /*
- * never fails
- */
- return SNMPERR_SUCCESS;
- }
-
-
-
- /************************************************************
- * _${context}_container_row_save
- */
- static int
- _${context}_container_row_save(
- ${context}_rowreq_ctx *rowreq_ctx,
- void *type)
- {
- /*
- * Allocate space for a line with all data for a row. An
- * attempt is made to come up with a default maximum size, but
- * there is no guarantee it will be enough. It probably will be,
- * unless you are dealing with large values or you have external
- * indexes.
- *
- * 1) allocate space for each column. Comment out columns you don't
- * intend to save. You may also need to add room for any non-
- * column data you want to store. Remeber, data will be stored in
- * ASCII form, so you need to allow for that. Here are some
- * general guidelines:
- *
- * Object ID : 12 * len [ASCII len of max int + 1 for .]
- * Octet String: (2 * len) + 2 [2 ASCII chars per byte + "0x"]
- * Integers : 12 [ASCII len for smallest negative number]
- *
- * 2) You also need to allocate space for the row index. This will
- * be stored as an OID, which means that Octet Strings need to
- * be treated a little differently. Specifically, you will need
- * (4 * len) + 4 [3 ASCII chars per byte + 1 for ., + 4 for len].
- *
- * 3) Also, remeber to add space for the identifier and seperator
- * characters (for example, each column is prefixed by the
- * column number and a semicolon. To allow for the maximum
- * column values, 12 bytes [11 for oid + 1 for ':'] per
- * column are added).
- */
- /** xxx: add storage for external index(s)! */
- #define MAX_ROW_SIZE (sizeof(row_token) + 1 + \
- @ if $ext_index != 0@
- ( 12 * 128 ) + /* external interfaces - max 128 subids */ \
- @ end@
- @ foreach $node nonindex@
- @ include m2c_setup_node.m2i@
- @ if ($node.settable == 1)@
- @ if "$node.type" eq "ASN_OBJECT_ID"@
- ( ( 12 * sizeof(${m2c_ctx_rh}) ) + 3 ) + /* $node.type */ \
- @ elsif "$node.type" eq "ASN_OCTET_STR"@
- ( ( 2 * sizeof(${m2c_ctx_rh}) ) + 3 ) + /* $node.type */ \
- @ else@
- ( 12 ) + /* $node.type $node */ \
- @ end@
- @ end@
- @ end@
- ( $table.uc_MAX_COL * 12 ) + /* column num prefix + : */ \
- 2 /* LINE_TERM_CHAR + \n */ )
-
- char buf[MAX_ROW_SIZE], *pos = buf, *max = &buf[MAX_ROW_SIZE-1];
- char *tmp;
- int i;
-
- if (${context}_container_should_save(rowreq_ctx) == 0) {
- return SNMP_ERR_NOERROR;
- }
-
- /*
- * build the line
- */
- pos += sprintf(pos, "%s ", row_token);
- pos = read_config_save_objid(pos, rowreq_ctx->oid_idx.oids,
- rowreq_ctx->oid_idx.len);
- if(NULL == pos) {
- snmp_log(LOG_ERR,"error saving ${context} row "
- "to persistent file\n");
- return SNMP_ERR_GENERR;
- }
- *pos++ = ' ';
- if(pos > max) {
- snmp_log(LOG_ERR,"error saving ${context} row "
- "to persistent file (too long)\n");
- return SNMP_ERR_GENERR;
- }
-
- /*
- * add each column
- */
- for(i = $table.uc_MIN_COL; i <= $table.uc_MAX_COL; ++i ) {
-
- if ((0x1 << (i-1)) & ~$context.uc_SETTABLE_COLS)
- continue;
-
- tmp = pos;
- pos = _${context}_container_col_save(rowreq_ctx, i, pos);
- if(NULL == pos)
- pos = tmp;
- else
- *pos++ = ' ';
- if(pos > max) {
- snmp_log(LOG_ERR,"error saving ${context} row "
- "to persistent file (too long)\n");
- return SNMP_ERR_GENERR;
- }
- }
-
- /*
- * if you have non-column data, add it here
- */
-
-
- /*
- * store the line
- */
- pos += sprintf(pos, "%c", LINE_TERM_CHAR);
- if(pos > max) {
- snmp_log(LOG_ERR,"error saving ${context} row "
- "to persistent file (too long)\n");
- return SNMP_ERR_GENERR;
- }
- read_config_store((char*)type, buf);
-
- DEBUGMSGTL(("internal:${context}:_${context}_container_row_save",
- "saving line '%s'\n", buf));
-
- return SNMP_ERR_NOERROR;
- }
-
- static void
- _${context}_container_row_restore(const char *token, char *buf)
- {
- ${context}_rowreq_ctx * rowreq_ctx;
- netsnmp_index index;
- oid tmp_oid[ MAX_${context}_IDX_LEN];
- u_int col = 0, found = 0;
-
-
- if (strncmp(token, row_token, sizeof(row_token)) != 0) {
- snmp_log(LOG_ERR, "unknown token in _${context}_container_row_restore\n");
- return;
- }
-
- DEBUGMSGTL(("internal:${context}:_${context}_container_row_restore",
- "parsing line '%s'\n", buf));
-
- /*
- * pull out index and create default row
- */
- index.oids = tmp_oid;
- index.len = OID_LENGTH(tmp_oid);
- buf = read_config_read_objid(buf, &index.oids,
- &index.len);
- if (NULL == buf) {
- snmp_log(LOG_ERR, "error reading row index in "
- "_${context}_container_row_restore\n");
- return;
- }
- rowreq_ctx = _mfd_${context}_rowreq_from_index( &index, NULL );
- if (NULL == rowreq_ctx) {
- snmp_log(LOG_ERR, "error creating row index in "
- "_${context}_container_row_restore\n");
- return;
- }
-
- /*
- * loop through and get each column
- */
- buf = skip_white(buf);
- while ( (NULL != buf) && isdigit(*buf) ) {
- /*
- * extract column, skip ':'
- */
- col = (u_int)strtol(buf, &buf, 10);
- if (NULL == buf)
- break;
- if (*buf != ':') {
- buf = NULL;
- break;
- }
- ++buf; /* skip : */
-
- /*
- * parse value
- */
- DEBUGMSGTL(("_${context}_container_row_restore",
- "parsing column %d\n", col));
- buf = _${context}_container_col_restore( rowreq_ctx, col, buf );
- ++found;
- }
- if (0 == found) {
- snmp_log(LOG_ERR, "error parsing ${context} row; no columns found\n");
- ${context}_release_rowreq_ctx( rowreq_ctx );
- return;
- }
-
- /*
- * if you added any non-column data, this is where
- * you should handle it.
- */
-
- /*
- * if the pointer is NULL and we didn't reach the
- * end of the line, something went wrong. Log message,
- * delete the row and bail.
- */
- if ((buf == NULL) || (*buf != LINE_TERM_CHAR)) {
- snmp_log(LOG_ERR, "error parsing ${context} row around column %d\n",
- col);
- ${context}_release_rowreq_ctx( rowreq_ctx );
- return;
- }
-
- DEBUGMSGTL(("internal:${context}:_${context}_container_row_restore",
- "inserting row\n"));
-
- /*
- * copy oid index and insert row
- */
- rowreq_ctx->oid_idx.len = index.len;
- memcpy(rowreq_ctx->oid_idx.oids, index.oids, index.len * sizeof(oid));
-
- CONTAINER_INSERT(${context}_if_ctx.container, rowreq_ctx);
- }
-
- /************************************************************
- * _${context}_container_col_save
- */
- static char *
- _${context}_container_col_save(
- ${context}_rowreq_ctx *rowreq_ctx,
- u_int col, char* buf)
- {
- if( ( NULL == rowreq_ctx ) || ( NULL == buf )) {
- snmp_log(LOG_ERR, "bad parameter in "
- "_${context}_container_col_save\n");
- return NULL;
- }
-
- DEBUGMSGTL(("internal:${context}:_${context}_container_col_save",
- "processing column %d\n", col));
-
- /*
- * prefix with column number, so we don't ever depend on
- * order saved.
- */
- buf += sprintf(buf, "%u:", col);
-
- /*
- * save data for the column
- */
- switch(col) {
-
- @ foreach $node nonindex@
- @ include m2c_setup_node.m2i@
- case COLUMN_$node.uc: /** $node.syntax = $node.type */
- @ if $m2c_node_needlength == 1@
- @ if "$node.type" eq "ASN_OBJECT_ID"@
- buf = read_config_save_objid(buf, ${m2c_ctx_rh},
- ${m2c_ctx_rhs} );
- @ else@ # "$node.type" eq "ASN_OCTET_STR"@
- buf = read_config_save_octet_string(buf, ${m2c_ctx_rh},
- ${m2c_ctx_rhs} );
- @ end@
- @ elsif "$node.type" eq "ASN_INTEGER"@
- buf += sprintf(buf,"%ld",${m2c_ctx_rh});
- @ else@
- buf += sprintf(buf,"%lu",${m2c_ctx_rh});
- @ end@
- break;
-
- @ end@ # for each
- default: /** We shouldn't get here */
- snmp_log(LOG_ERR, "unknown column %d in "
- "_${context}_container_col_save\n", col);
- return NULL;
- }
-
- return buf;
- }
-
- /************************************************************
- * _${context}_container_col_restore
- */
- static char *
- _${context}_container_col_restore(
- ${context}_rowreq_ctx *rowreq_ctx,
- u_int col, char* buf)
- {
- size_t len;
- if( ( NULL == rowreq_ctx ) || ( NULL == buf )) {
- snmp_log(LOG_ERR, "bad parameter in "
- "_${context}_container_col_restore\n");
- return NULL;
- }
-
- DEBUGMSGTL(("verbose:${context}:_${context}_container_col_restore",
- "processing column %d\n", col));
-
- /*
- * restore data for the column
- */
- switch(col) {
-
- @ foreach $node nonindex@
- @ include m2c_setup_node.m2i@
- case COLUMN_$node.uc: /** $node.syntax = $node.type */
- @ if $m2c_node_needlength == 1@
- ${m2c_ctx_rhs} = sizeof(${m2c_ctx_rh});
- buf = read_config_read_memory($node.type,buf,
- (char*)&${m2c_ctx_rh},
- (size_t*)&${m2c_ctx_rhs} );
- @ if "$node.type" eq "ASN_OBJECT_ID"@
- ${m2c_ctx_rhs} /= sizeof(oid);
- @ end@
- @ else@
- len = sizeof(${m2c_ctx_rh});
- @ if "$node.type" eq "ASN_OCTET_STR"@ # BITS
- @ eval $m2c_tmp = "ASN_INTEGER"@
- @ else@
- @ eval $m2c_tmp = $node.type@
- @ end@
- buf = read_config_read_memory($m2c_tmp, buf,
- (char*)&${m2c_ctx_rh},
- &len);
- @ end@
- @ if $m2c_table_sparse == 1@
- if (NULL != buf)
- rowreq_ctx->column_exists_flags |= COLUMN_$node.uc_FLAG;
- @ end@ # table sparse
- break;
-
- @ end@ # foreach col
- default: /** We shouldn't get here */
- snmp_log(LOG_ERR, "unknown column %d in "
- "_${context}_container_col_restore\n", col);
- return NULL;
- }
-
- return buf;
- }
-
- ##
- @end@ // $m2c_processing_type eq 'i'
- ########################################################################
- @if $m2c_mark_boundary == 1@
- /** END code generated by $RCSfile$ $Revision: 15990 $ */
- @end@
-