701830f0ab
- Checked argument types and counts - Removed trailing line feeds - Removed thread ids from error logs (they are used in trace / debug log - Added some state information to dcbs - Added prefix 'Error' or 'Fatal' to error logs. - Switches all error logs to use flushing log write.
831 lines
24 KiB
C
831 lines
24 KiB
C
/*
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* This file is distributed as part of the SkySQL Gateway. It is free
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* software: you can redistribute it and/or modify it under the terms of the
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* GNU General Public License as published by the Free Software Foundation,
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* version 2.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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* details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; if not, write to the Free Software Foundation, Inc., 51
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* Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Copyright SkySQL Ab 2013
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*/
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/**
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* @file config.c - Read the gateway.cnf configuration file
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*
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* @verbatim
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* Revision History
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*
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* Date Who Description
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* 21/06/13 Mark Riddoch Initial implementation
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* 08/07/13 Mark Riddoch Addition on monitor module support
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* 23/07/13 Mark Riddoch Addition on default monitor password
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*
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* @endverbatim
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*/
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <ini.h>
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#include <config.h>
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#include <service.h>
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#include <server.h>
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#include <users.h>
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#include <monitor.h>
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#include <skygw_utils.h>
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#include <log_manager.h>
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static int process_config_context(CONFIG_CONTEXT *);
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static int process_config_update(CONFIG_CONTEXT *);
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static void free_config_context(CONFIG_CONTEXT *);
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static char *config_get_value(CONFIG_PARAMETER *, const char *);
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static int handle_global_item(const char *, const char *);
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static void global_defaults();
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static void check_config_objects(CONFIG_CONTEXT *context);
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static char *config_file = NULL;
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static GATEWAY_CONF gateway;
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/**
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* Config item handler for the ini file reader
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*
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* @param userdata The config context element
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* @param section The config file section
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* @param name The Parameter name
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* @param value The Parameter value
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* @return zero on error
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*/
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static int
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handler(void *userdata, const char *section, const char *name, const char *value)
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{
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CONFIG_CONTEXT *cntxt = (CONFIG_CONTEXT *)userdata;
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CONFIG_CONTEXT *ptr = cntxt;
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CONFIG_PARAMETER *param;
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if (strcmp(section, "gateway") == 0 || strcasecmp(section, "MaxScale") == 0)
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{
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return handle_global_item(name, value);
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}
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/*
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* If we already have some parameters for the object
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* add the parameters to that object. If not create
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* a new object.
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*/
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while (ptr && strcmp(ptr->object, section) != 0)
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ptr = ptr->next;
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if (!ptr)
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{
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if ((ptr = (CONFIG_CONTEXT *)malloc(sizeof(CONFIG_CONTEXT))) == NULL)
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return 0;
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ptr->object = strdup(section);
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ptr->parameters = NULL;
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ptr->next = cntxt->next;
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ptr->element = NULL;
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cntxt->next = ptr;
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}
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if ((param = (CONFIG_PARAMETER *)malloc(sizeof(CONFIG_PARAMETER))) == NULL)
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return 0;
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param->name = strdup(name);
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param->value = strdup(value);
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param->next = ptr->parameters;
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ptr->parameters = param;
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return 1;
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}
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/**
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* Load the configuration file for the gateway
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*
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* @param file The filename of the configuration file
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* @return A zero return indicates a fatal error reading the configuration
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*/
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int
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config_load(char *file)
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{
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CONFIG_CONTEXT config;
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int rval;
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global_defaults();
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config.object = "";
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config.next = NULL;
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if (ini_parse(file, handler, &config) < 0)
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return 0;
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config_file = file;
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check_config_objects(config.next);
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rval = process_config_context(config.next);
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free_config_context(config.next);
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return rval;
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}
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/**
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* Reload the configuration file for the gateway
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*
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* @return A zero return indicates a fatal error reading the configuration
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*/
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int
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config_reload()
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{
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CONFIG_CONTEXT config;
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int rval;
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if (!config_file)
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return 0;
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global_defaults();
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config.object = "";
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config.next = NULL;
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if (ini_parse(config_file, handler, &config) < 0)
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return 0;
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rval = process_config_update(config.next);
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free_config_context(config.next);
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return rval;
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}
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/**
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* Process a configuration context and turn it into the set of object
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* we need.
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*
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* @param context The configuration data
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* @return A zero result indicates a fatal error
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*/
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static int
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process_config_context(CONFIG_CONTEXT *context)
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{
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CONFIG_CONTEXT *obj;
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int error_count = 0;
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/**
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* Process the data and create the services and servers defined
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* in the data.
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*/
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obj = context;
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while (obj)
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{
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char *type = config_get_value(obj->parameters, "type");
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if (type == NULL)
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{
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skygw_log_write_flush(
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LOGFILE_ERROR,
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"Error : Configuration object '%s' has no type.",
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obj->object);
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error_count++;
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}
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else if (!strcmp(type, "service"))
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{
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char *router = config_get_value(obj->parameters,
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"router");
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if (router)
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{
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obj->element = service_alloc(obj->object, router);
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char *user =
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config_get_value(obj->parameters, "user");
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char *auth =
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config_get_value(obj->parameters, "auth");
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if (obj->element && user && auth)
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serviceSetUser(obj->element, user, auth);
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}
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else
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{
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obj->element = NULL;
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skygw_log_write_flush(
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LOGFILE_ERROR,
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"Error : No router defined for service "
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"'%s'\n",
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obj->object);
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error_count++;
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}
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}
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else if (!strcmp(type, "server"))
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{
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char *address;
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char *port;
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char *protocol;
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char *monuser;
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char *monpw;
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address = config_get_value(obj->parameters, "address");
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port = config_get_value(obj->parameters, "port");
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protocol = config_get_value(obj->parameters, "protocol");
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monuser = config_get_value(obj->parameters,"monitoruser");
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monpw = config_get_value(obj->parameters, "monitorpw");
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if (address && port && protocol)
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obj->element = server_alloc(address,
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protocol,
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atoi(port));
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else
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{
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obj->element = NULL;
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skygw_log_write_flush(
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LOGFILE_ERROR,
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"Error : Server '%s' is missing a "
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"required configuration parameter. A "
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"server must "
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"have address, port and protocol "
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"defined.",
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obj->object);
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error_count++;
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}
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if (obj->element && monuser && monpw)
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serverAddMonUser(obj->element, monuser, monpw);
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else
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skygw_log_write_flush(
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LOGFILE_ERROR,
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"Warning : server '%s' has no valid "
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"monitor user defined. The server may "
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"not be monitored.\n",
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obj->object);
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}
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obj = obj->next;
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}
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/*
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* Now we have the services we can add the servers to the services
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* add the protocols to the services
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*/
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obj = context;
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while (obj)
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{
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char *type = config_get_value(obj->parameters, "type");
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if (type == NULL)
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;
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else if (!strcmp(type, "service"))
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{
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char *servers;
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char *roptions;
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servers = config_get_value(obj->parameters, "servers");
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roptions = config_get_value(obj->parameters,
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"router_options");
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if (servers && obj->element)
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{
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char *s = strtok(servers, ",");
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while (s)
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{
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CONFIG_CONTEXT *obj1 = context;
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while (obj1)
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{
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if (strcmp(s, obj1->object) == 0 &&
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obj->element && obj1->element)
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{
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serviceAddBackend(
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obj->element,
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obj1->element);
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}
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obj1 = obj1->next;
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}
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s = strtok(NULL, ",");
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}
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}
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else if (servers == NULL)
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{
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skygw_log_write_flush(
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LOGFILE_ERROR,
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"Error : The service '%s' is missing a "
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"definition of the servers that provide "
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"the service.",
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obj->object);
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}
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if (roptions && obj->element)
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{
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char *s = strtok(roptions, ",");
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while (s)
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{
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serviceAddRouterOption(obj->element, s);
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s = strtok(NULL, ",");
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}
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}
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}
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else if (!strcmp(type, "listener"))
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{
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char *service;
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char *port;
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char *protocol;
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service = config_get_value(obj->parameters, "service");
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port = config_get_value(obj->parameters, "port");
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protocol = config_get_value(obj->parameters, "protocol");
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if (service && port && protocol)
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{
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CONFIG_CONTEXT *ptr = context;
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while (ptr && strcmp(ptr->object, service) != 0)
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ptr = ptr->next;
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if (ptr && ptr->element)
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serviceAddProtocol(ptr->element,
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protocol,
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atoi(port));
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}
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else
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{
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skygw_log_write_flush(
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LOGFILE_ERROR,
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"Error : Listener '%s' is misisng a "
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"required "
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"parameter. A Listener must have a "
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"service, port and protocol defined.",
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obj->object);
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error_count++;
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}
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}
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else if (!strcmp(type, "monitor"))
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{
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char *module;
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char *servers;
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char *user;
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char *passwd;
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module = config_get_value(obj->parameters, "module");
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servers = config_get_value(obj->parameters, "servers");
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user = config_get_value(obj->parameters, "user");
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passwd = config_get_value(obj->parameters, "passwd");
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if (module)
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{
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obj->element = monitor_alloc(obj->object, module);
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if (servers && obj->element)
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{
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char *s = strtok(servers, ",");
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while (s)
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{
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CONFIG_CONTEXT *obj1 = context;
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while (obj1)
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{
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if (strcmp(s, obj1->object) == 0 &&
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obj->element && obj1->element)
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{
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monitorAddServer(
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obj->element,
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obj1->element);
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}
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obj1 = obj1->next;
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}
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s = strtok(NULL, ",");
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}
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}
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if (obj->element && user && passwd)
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{
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monitorAddUser(obj->element,
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user,
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passwd);
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}
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}
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else
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{
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obj->element = NULL;
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skygw_log_write_flush(
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LOGFILE_ERROR,
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"Error : Monitor '%s' is missing a "
|
|
"require module parameter.",
|
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obj->object);
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error_count++;
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}
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}
|
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else if (strcmp(type, "server") != 0)
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{
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|
skygw_log_write_flush(
|
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LOGFILE_ERROR,
|
|
"Error : Configuration object '%s' has an "
|
|
"invalid type specified.",
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|
obj->object);
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error_count++;
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|
}
|
|
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|
obj = obj->next;
|
|
}
|
|
|
|
if (error_count)
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{
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skygw_log_write_flush(
|
|
LOGFILE_ERROR,
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"Error : %d errors where encountered processing the "
|
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"configuration file '%s'.",
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error_count,
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|
config_file);
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return 0;
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}
|
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return 1;
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|
}
|
|
|
|
/**
|
|
* Get the value of a config parameter
|
|
*
|
|
* @param params The linked list of config parameters
|
|
* @param name The parameter to return
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|
* @return the parameter value or NULL if not found
|
|
*/
|
|
static char *
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|
config_get_value(CONFIG_PARAMETER *params, const char *name)
|
|
{
|
|
while (params)
|
|
{
|
|
if (!strcmp(params->name, name))
|
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return params->value;
|
|
params = params->next;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
/**
|
|
* Free a config tree
|
|
*
|
|
* @param context The configuration data
|
|
*/
|
|
static void
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|
free_config_context(CONFIG_CONTEXT *context)
|
|
{
|
|
CONFIG_CONTEXT *obj;
|
|
CONFIG_PARAMETER *p1, *p2;
|
|
|
|
while (context)
|
|
{
|
|
free(context->object);
|
|
p1 = context->parameters;
|
|
while (p1)
|
|
{
|
|
free(p1->name);
|
|
free(p1->value);
|
|
p2 = p1->next;
|
|
free(p1);
|
|
p1 = p2;
|
|
}
|
|
obj = context->next;
|
|
free(context);
|
|
context = obj;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Return the number of configured threads
|
|
*
|
|
* @return The number of threads configured in the config file
|
|
*/
|
|
int
|
|
config_threadcount()
|
|
{
|
|
return gateway.n_threads;
|
|
}
|
|
|
|
/**
|
|
* Configuration handler for items in the global [gateway] section
|
|
*
|
|
* @param name The item name
|
|
* @param value The item value
|
|
* @return 0 on error
|
|
*/
|
|
static int
|
|
handle_global_item(const char *name, const char *value)
|
|
{
|
|
if (strcmp(name, "threads") == 0) {
|
|
gateway.n_threads = atoi(value);
|
|
} else {
|
|
return 0;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
/**
|
|
* Set the defaults for the global configuration options
|
|
*/
|
|
static void
|
|
global_defaults()
|
|
{
|
|
gateway.n_threads = 1;
|
|
}
|
|
|
|
/**
|
|
* Process a configuration context update and turn it into the set of object
|
|
* we need.
|
|
*
|
|
* @param context The configuration data
|
|
*/
|
|
static int
|
|
process_config_update(CONFIG_CONTEXT *context)
|
|
{
|
|
CONFIG_CONTEXT *obj;
|
|
SERVICE *service;
|
|
SERVER *server;
|
|
|
|
/**
|
|
* Process the data and create the services and servers defined
|
|
* in the data.
|
|
*/
|
|
obj = context;
|
|
while (obj)
|
|
{
|
|
char *type = config_get_value(obj->parameters, "type");
|
|
if (type == NULL)
|
|
skygw_log_write_flush(
|
|
LOGFILE_ERROR,
|
|
"Error : Configuration object %s has no type.",
|
|
obj->object);
|
|
else if (!strcmp(type, "service"))
|
|
{
|
|
char *router = config_get_value(obj->parameters,
|
|
"router");
|
|
if (router)
|
|
{
|
|
if ((service = service_find(obj->object)) != NULL)
|
|
{
|
|
char *user;
|
|
char *auth;
|
|
|
|
user = config_get_value(obj->parameters,
|
|
"user");
|
|
auth = config_get_value(obj->parameters,
|
|
"auth");
|
|
if (user && auth)
|
|
service_update(service, router,
|
|
user,
|
|
auth);
|
|
obj->element = service;
|
|
}
|
|
else
|
|
{
|
|
char *user;
|
|
char *auth;
|
|
|
|
user = config_get_value(obj->parameters,
|
|
"user");
|
|
auth = config_get_value(obj->parameters,
|
|
"auth");
|
|
obj->element = service_alloc(obj->object,
|
|
router);
|
|
|
|
if (obj->element && user && auth)
|
|
{
|
|
serviceSetUser(obj->element,
|
|
user,
|
|
auth);
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
obj->element = NULL;
|
|
skygw_log_write_flush(
|
|
LOGFILE_ERROR,
|
|
"Error : No router defined for service "
|
|
"'%s'.",
|
|
obj->object);
|
|
}
|
|
}
|
|
else if (!strcmp(type, "server"))
|
|
{
|
|
char *address;
|
|
char *port;
|
|
char *protocol;
|
|
char *monuser;
|
|
char *monpw;
|
|
|
|
address = config_get_value(obj->parameters, "address");
|
|
port = config_get_value(obj->parameters, "port");
|
|
protocol = config_get_value(obj->parameters, "protocol");
|
|
monuser = config_get_value(obj->parameters,
|
|
"monitoruser");
|
|
monpw = config_get_value(obj->parameters, "monitorpw");
|
|
|
|
if (address && port && protocol)
|
|
{
|
|
if ((server =
|
|
server_find(address, atoi(port))) != NULL)
|
|
{
|
|
server_update(server,
|
|
protocol,
|
|
monuser,
|
|
monpw);
|
|
obj->element = server;
|
|
}
|
|
else
|
|
{
|
|
obj->element = server_alloc(address,
|
|
protocol,
|
|
atoi(port));
|
|
if (obj->element && monuser && monpw)
|
|
{
|
|
serverAddMonUser(obj->element,
|
|
monuser,
|
|
monpw);
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
skygw_log_write_flush(
|
|
LOGFILE_ERROR,
|
|
"Error : Server '%s' is missing a "
|
|
"required "
|
|
"configuration parameter. A server must "
|
|
"have address, port and protocol "
|
|
"defined.",
|
|
obj->object);
|
|
}
|
|
}
|
|
obj = obj->next;
|
|
}
|
|
|
|
/*
|
|
* Now we have the services we can add the servers to the services
|
|
* add the protocols to the services
|
|
*/
|
|
obj = context;
|
|
while (obj)
|
|
{
|
|
char *type = config_get_value(obj->parameters, "type");
|
|
if (type == NULL)
|
|
;
|
|
else if (!strcmp(type, "service"))
|
|
{
|
|
char *servers;
|
|
char *roptions;
|
|
|
|
servers = config_get_value(obj->parameters, "servers");
|
|
roptions = config_get_value(obj->parameters,
|
|
"router_options");
|
|
if (servers && obj->element)
|
|
{
|
|
char *s = strtok(servers, ",");
|
|
while (s)
|
|
{
|
|
CONFIG_CONTEXT *obj1 = context;
|
|
while (obj1)
|
|
{
|
|
if (strcmp(s, obj1->object) == 0 &&
|
|
obj->element && obj1->element)
|
|
{
|
|
if (!serviceHasBackend(obj->element, obj1->element))
|
|
{
|
|
serviceAddBackend(
|
|
obj->element,
|
|
obj1->element);
|
|
}
|
|
}
|
|
obj1 = obj1->next;
|
|
}
|
|
s = strtok(NULL, ",");
|
|
}
|
|
}
|
|
if (roptions && obj->element)
|
|
{
|
|
char *s = strtok(roptions, ",");
|
|
serviceClearRouterOptions(obj->element);
|
|
while (s)
|
|
{
|
|
serviceAddRouterOption(obj->element, s);
|
|
s = strtok(NULL, ",");
|
|
}
|
|
}
|
|
}
|
|
else if (!strcmp(type, "listener"))
|
|
{
|
|
char *service;
|
|
char *port;
|
|
char *protocol;
|
|
|
|
service = config_get_value(obj->parameters, "service");
|
|
port = config_get_value(obj->parameters, "port");
|
|
protocol = config_get_value(obj->parameters, "protocol");
|
|
|
|
if (service && port && protocol)
|
|
{
|
|
CONFIG_CONTEXT *ptr = context;
|
|
while (ptr && strcmp(ptr->object, service) != 0)
|
|
ptr = ptr->next;
|
|
|
|
if (ptr &&
|
|
ptr->element &&
|
|
serviceHasProtocol(ptr->element,
|
|
protocol,
|
|
atoi(port)) == 0)
|
|
{
|
|
serviceAddProtocol(ptr->element,
|
|
protocol,
|
|
atoi(port));
|
|
serviceStartProtocol(ptr->element,
|
|
protocol,
|
|
atoi(port));
|
|
}
|
|
}
|
|
}
|
|
else if (strcmp(type, "server") != 0 &&
|
|
strcmp(type, "monitor") != 0)
|
|
{
|
|
skygw_log_write_flush(
|
|
LOGFILE_ERROR,
|
|
"Error : Configuration object %s has an invalid "
|
|
"type specified.",
|
|
obj->object);
|
|
}
|
|
obj = obj->next;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
static char *service_params[] =
|
|
{
|
|
"type",
|
|
"router",
|
|
"router_options",
|
|
"servers",
|
|
"user",
|
|
"auth",
|
|
NULL
|
|
};
|
|
|
|
static char *server_params[] =
|
|
{
|
|
"type",
|
|
"address",
|
|
"port",
|
|
"protocol",
|
|
"monitorpw",
|
|
"monitoruser",
|
|
NULL
|
|
};
|
|
|
|
static char *listener_params[] =
|
|
{
|
|
"type",
|
|
"service",
|
|
"protocol",
|
|
"port",
|
|
NULL
|
|
};
|
|
|
|
static char *monitor_params[] =
|
|
{
|
|
"type",
|
|
"module",
|
|
"servers",
|
|
"user",
|
|
"passwd",
|
|
NULL
|
|
};
|
|
/**
|
|
* Check the configuration objects have valid parameters
|
|
*/
|
|
static void
|
|
check_config_objects(CONFIG_CONTEXT *context)
|
|
{
|
|
CONFIG_CONTEXT *obj;
|
|
CONFIG_PARAMETER *params;
|
|
char *type, **param_set;
|
|
int i;
|
|
|
|
/**
|
|
* Process the data and create the services and servers defined
|
|
* in the data.
|
|
*/
|
|
obj = context;
|
|
while (obj)
|
|
{
|
|
type = config_get_value(obj->parameters, "type");
|
|
if (!strcmp(type, "service"))
|
|
param_set = service_params;
|
|
else if (!strcmp(type, "server"))
|
|
param_set = server_params;
|
|
else if (!strcmp(type, "listener"))
|
|
param_set = listener_params;
|
|
else if (!strcmp(type, "monitor"))
|
|
param_set = monitor_params;
|
|
else
|
|
param_set = NULL;
|
|
if (param_set != NULL)
|
|
{
|
|
params = obj->parameters;
|
|
while (params)
|
|
{
|
|
int found = 0;
|
|
for (i = 0; param_set[i]; i++)
|
|
if (!strcmp(params->name, param_set[i]))
|
|
found = 1;
|
|
if (found == 0)
|
|
skygw_log_write_flush(
|
|
LOGFILE_ERROR,
|
|
"Error : Unexpected parameter "
|
|
"'%s' for xobject '%s' of type "
|
|
"'%s'.",
|
|
params->name,
|
|
obj->object,
|
|
type);
|
|
params = params->next;
|
|
}
|
|
}
|
|
obj = obj->next;
|
|
}
|
|
}
|