e31afa28e4
The created listeners are now stored to disk like created servers are. This allows them to be used even after a restart. Currently, the listeners cannot be deleted and need to be manually removed.
283 lines
12 KiB
C
283 lines
12 KiB
C
#pragma once
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/*
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* Copyright (c) 2016 MariaDB Corporation Ab
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*
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* Use of this software is governed by the Business Source License included
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* in the LICENSE.TXT file and at www.mariadb.com/bsl.
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*
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* Change Date: 2019-07-01
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*
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* On the date above, in accordance with the Business Source License, use
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* of this software will be governed by version 2 or later of the General
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* Public License.
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*/
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/**
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* @file service.h
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*
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* The service level definitions within the gateway
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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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* 14/06/13 Mark Riddoch Initial implementation
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* 18/06/13 Mark Riddoch Addition of statistics and function
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* prototypes
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* 23/06/13 Mark Riddoch Added service user and users
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* 06/02/14 Massimiliano Pinto Added service flag for root user access
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* 25/02/14 Massimiliano Pinto Added service refresh limit feature
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* 07/05/14 Massimiliano Pinto Added version_string field to service
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* struct
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* 29/05/14 Mark Riddoch Filter API mechanism
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* 26/06/14 Mark Riddoch Added WeightBy support
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* 09/09/14 Massimiliano Pinto Added service option for localhost authentication
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* 09/10/14 Massimiliano Pinto Added service resources via hashtable
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* 31/05/16 Martin Brampton Add fields to support connection throttling
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*
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* @endverbatim
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*/
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#include <maxscale/cdefs.h>
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#include <time.h>
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#include <maxscale/gw_protocol.h>
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#include <maxscale/spinlock.h>
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#include <maxscale/dcb.h>
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#include <maxscale/server.h>
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#include <maxscale/listener.h>
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#include <maxscale/filter.h>
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#include <maxscale/hashtable.h>
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#include <maxscale/resultset.h>
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#include <maxscale/config.h>
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#include <maxscale/queuemanager.h>
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#include <openssl/crypto.h>
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#include <openssl/ssl.h>
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#include <openssl/err.h>
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#include <openssl/dh.h>
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MXS_BEGIN_DECLS
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struct server;
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struct router;
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struct router_object;
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struct users;
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/**
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* The service statistics structure
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*/
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typedef struct
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{
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time_t started; /**< The time when the service was started */
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int n_failed_starts; /**< Number of times this service has failed to start */
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int n_sessions; /**< Number of sessions created on service since start */
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int n_current; /**< Current number of sessions */
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} SERVICE_STATS;
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/**
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* The service user structure holds the information that is needed
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for this service to allow the gateway to login to the backend
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database and extact information such as the user table or other
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database status or configuration data.
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*/
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typedef struct
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{
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char *name; /**< The user name to use to extract information */
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char *authdata; /**< The authentication data requied */
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} SERVICE_USER;
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/**
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* The service refresh rate holds the counter and last load time_t
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for this service to load users data from the backend database
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*/
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typedef struct
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{
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int nloads;
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time_t last;
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} SERVICE_REFRESH_RATE;
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typedef struct server_ref_t
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{
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struct server_ref_t *next; /**< Next server reference */
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SERVER* server; /**< The actual server */
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int weight; /**< Weight of this server */
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int connections; /**< Number of connections created through this reference */
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bool active; /**< Whether this reference is valid and in use*/
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} SERVER_REF;
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/** Macro to check whether a SERVER_REF is active */
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#define SERVER_REF_IS_ACTIVE(ref) (ref->active && SERVER_IS_ACTIVE(ref->server))
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#define SERVICE_MAX_RETRY_INTERVAL 3600 /*< The maximum interval between service start retries */
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/** Value of service timeout if timeout checks are disabled */
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#define SERVICE_NO_SESSION_TIMEOUT LONG_MAX
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/**
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* Parameters that are automatically detected but can also be configured by the
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* user are initially set to this value.
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*/
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#define SERVICE_PARAM_UNINIT -1
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/* Refresh rate limits for load users from database */
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#define USERS_REFRESH_TIME 30 /* Allowed time interval (in seconds) after last update*/
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#define USERS_REFRESH_MAX_PER_TIME 4 /* Max number of load calls within the time interval */
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/** Default timeout values used by the connections which fetch user authentication data */
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#define DEFAULT_AUTH_CONNECT_TIMEOUT 3
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#define DEFAULT_AUTH_READ_TIMEOUT 1
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#define DEFAULT_AUTH_WRITE_TIMEOUT 2
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/**
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* Defines a service within the gateway.
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*
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* A service is a combination of a set of backend servers, a routing mechanism
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* and a set of client side protocol/port pairs used to listen for new connections
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* to the service.
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*/
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typedef struct service
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{
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char *name; /**< The service name */
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int state; /**< The service state */
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int client_count; /**< Number of connected clients */
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int max_connections; /**< Maximum client connections */
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QUEUE_CONFIG *queued_connections; /**< Queued connections, if set */
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SERV_LISTENER *ports; /**< Linked list of ports and protocols
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* that this service will listen on.
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*/
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char *routerModule; /**< Name of router module to use */
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char **routerOptions; /**< Router specific option strings */
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struct router_object *router; /**< The router we are using */
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void *router_instance; /**< The router instance for this service */
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char *version_string; /** version string for this service listeners */
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SERVER_REF *dbref; /** server references */
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int n_dbref; /** Number of server references */
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SERVICE_USER credentials; /**< The cedentials of the service user */
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SPINLOCK spin; /**< The service spinlock */
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SERVICE_STATS stats; /**< The service statistics */
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int enable_root; /**< Allow root user access */
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int localhost_match_wildcard_host; /**< Match localhost against wildcard */
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CONFIG_PARAMETER* svc_config_param;/*< list of config params and values */
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int svc_config_version; /*< Version number of configuration */
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bool svc_do_shutdown; /*< tells the service to exit loops etc. */
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bool users_from_all; /*< Load users from one server or all of them */
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bool strip_db_esc; /*< Remove the '\' characters from database names
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* when querying them from the server. MySQL Workbench seems
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* to escape at least the underscore character. */
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SPINLOCK users_table_spin; /**< The spinlock for users data refresh */
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SERVICE_REFRESH_RATE rate_limit; /**< The refresh rate limit for users table */
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FILTER_DEF **filters; /**< Ordered list of filters */
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int n_filters; /**< Number of filters */
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long conn_idle_timeout; /**< Session timeout in seconds */
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char *weightby;
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struct service *next; /**< The next service in the linked list */
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bool retry_start; /*< If starting of the service should be retried later */
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bool log_auth_warnings; /*< Log authentication failures and warnings */
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uint64_t capabilities; /*< The capabilities of the service. */
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} SERVICE;
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typedef enum count_spec_t
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{
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COUNT_NONE = 0,
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COUNT_ATLEAST,
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COUNT_EXACT,
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COUNT_ATMOST
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} count_spec_t;
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#define SERVICE_STATE_ALLOC 1 /**< The service has been allocated */
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#define SERVICE_STATE_STARTED 2 /**< The service has been started */
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#define SERVICE_STATE_FAILED 3 /**< The service failed to start */
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#define SERVICE_STATE_STOPPED 4 /**< The service has been stopped */
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extern SERVICE *service_alloc(const char *, const char *);
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extern int service_free(SERVICE *);
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extern SERVICE *service_find(const char *);
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extern int service_isvalid(SERVICE *);
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extern SERV_LISTENER* serviceCreateListener(SERVICE *service, const char *name, const char *protocol,
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const char *address, unsigned short port, const char *authenticator,
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const char *options, SSL_LISTENER *ssl);
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extern int serviceHasProtocol(SERVICE *service, const char *protocol,
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const char* address, unsigned short port);
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extern void serviceAddBackend(SERVICE *, SERVER *);
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extern void serviceRemoveBackend(SERVICE *, const SERVER *);
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extern bool serviceHasBackend(SERVICE *, SERVER *);
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extern void serviceAddRouterOption(SERVICE *, char *);
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extern void serviceClearRouterOptions(SERVICE *);
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extern int serviceStart(SERVICE *);
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extern int serviceStartAll();
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extern bool serviceListen(SERVICE *service, SERV_LISTENER *port);
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extern int serviceStop(SERVICE *);
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extern int serviceRestart(SERVICE *);
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extern int serviceSetUser(SERVICE *, char *, char *);
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extern int serviceGetUser(SERVICE *, char **, char **);
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extern bool serviceSetFilters(SERVICE *, char *);
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extern int serviceSetSSL(SERVICE *service, char* action);
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extern int serviceSetSSLVersion(SERVICE *service, char* version);
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extern int serviceSetSSLVerifyDepth(SERVICE* service, int depth);
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extern void serviceSetCertificates(SERVICE *service, char* cert, char* key, char* ca_cert);
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extern int serviceEnableRootUser(SERVICE *, int );
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extern int serviceSetTimeout(SERVICE *, int );
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extern int serviceSetConnectionLimits(SERVICE *, int, int, int);
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extern void serviceSetRetryOnFailure(SERVICE *service, char* value);
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extern void serviceWeightBy(SERVICE *, char *);
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extern char *serviceGetWeightingParameter(SERVICE *);
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extern int serviceEnableLocalhostMatchWildcardHost(SERVICE *, int);
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extern int serviceStripDbEsc(SERVICE* service, int action);
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extern int serviceAuthAllServers(SERVICE *service, int action);
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extern void service_update(SERVICE *, char *, char *, char *);
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extern int service_refresh_users(SERVICE *);
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extern void printService(SERVICE *);
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extern void printAllServices();
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extern void dprintAllServices(DCB *);
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extern bool service_set_param_value(SERVICE* service,
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CONFIG_PARAMETER* param,
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char* valstr,
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count_spec_t count_spec,
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config_param_type_t type);
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extern void dprintService(DCB *, SERVICE *);
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extern void dListServices(DCB *);
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extern void dListListeners(DCB *);
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extern char* service_get_name(SERVICE* svc);
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extern void service_shutdown();
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extern int serviceSessionCountAll();
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extern RESULTSET *serviceGetList();
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extern RESULTSET *serviceGetListenerList();
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extern bool service_all_services_have_listeners();
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/**
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* Get the capabilities of the servive.
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*
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* The capabilities of a service are the union of the capabilities of
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* its router and all filters.
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*
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* @return The service capabilities.
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*/
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static inline uint64_t service_get_capabilities(const SERVICE *service)
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{
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return service->capabilities;
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}
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/**
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* Check if a service uses @c servers
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* @param server Server that is queried
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* @return True if server is used by at least one service
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*/
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bool service_server_in_use(const SERVER *server);
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/**
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* @brief Serialize a service to a file
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*
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* This partially converts @c service into an INI format file. Only the servers
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* of the service are serialized. This allows the service to keep using the servers
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* added at runtime even after a restart.
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*
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* NOTE: This does not persist the complete service configuration and requires
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* that an existing service configuration is in the main configuration file.
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* Changes to service parameters are not persisted.
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*
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* @param service Service to serialize
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* @return False if the serialization of the service fails, true if it was successful
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*/
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bool service_serialize_servers(const SERVICE *service);
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MXS_END_DECLS
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