######################################################################## ## generic include for XXX. Do not use directly. ######################################################################## @if $m2c_mark_boundary == 1@ /** START code generated by mfd-persistence.m2i */ @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, remember to add space for the identifier and separator * 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 mfd-persistence.m2i */ @end@