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/*
SSSD
Data Provider, private header file
Copyright (C) Simo Sorce <ssorce@redhat.com> 2008
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef __DP_BACKEND_H__
#define __DP_BACKEND_H__
#include "providers/data_provider.h"
#include "providers/fail_over.h"
#include "util/child_common.h"
#include "db/sysdb.h"
/* a special token, if used in place of the hostname, denotes that real
* hostnames should be looked up from DNS using SRV requests
*/
#define BE_SRV_IDENTIFIER "_srv_"
struct be_ctx;
struct bet_ops;
struct be_req;
typedef int (*bet_init_fn_t)(TALLOC_CTX *, struct bet_ops **, void **);
typedef void (*be_shutdown_fn)(void *);
typedef void (*be_req_fn_t)(struct be_req *);
typedef void (*be_async_callback_t)(struct be_req *, int, int, const char *);
typedef void (*be_callback_t)(void *);
enum bet_type {
BET_NULL = 0,
BET_ID,
BET_AUTH,
BET_ACCESS,
BET_CHPASS,
BET_SUDO,
BET_MAX
};
struct bet_data {
enum bet_type bet_type;
const char *option_name;
const char *mod_init_fn_name_fmt;
};
struct loaded_be {
char *be_name;
void *handle;
};
struct bet_info {
enum bet_type bet_type;
struct bet_ops *bet_ops;
void *pvt_bet_data;
char *mod_name;
};
struct be_offline_status {
time_t went_offline;
bool offline;
};
struct be_client {
struct be_ctx *bectx;
struct sbus_connection *conn;
struct tevent_timer *timeout;
bool initialized;
};
struct be_failover_ctx;
struct be_cb;
struct be_ctx {
struct tevent_context *ev;
struct confdb_ctx *cdb;
struct sysdb_ctx *sysdb;
struct sss_domain_info *domain;
const char *identity;
const char *conf_path;
struct be_failover_ctx *be_fo;
struct sss_sigchild_ctx *sigchld_ctx;
/* Functions to be invoked when the
* backend goes online or offline
*/
struct be_cb *online_cb_list;
bool run_online_cb;
struct be_cb *offline_cb_list;
struct be_offline_status offstat;
struct sbus_connection *mon_conn;
struct sbus_connection *sbus_srv;
struct be_client *nss_cli;
struct be_client *pam_cli;
struct be_client *sudo_cli;
struct loaded_be loaded_be[BET_MAX];
struct bet_info bet_info[BET_MAX];
size_t check_online_ref_count;
};
struct bet_ops {
be_req_fn_t check_online;
be_req_fn_t handler;
be_req_fn_t finalize;
};
#define MAX_BE_REQ_RESTARTS 2
struct be_req {
struct be_client *becli;
struct be_ctx *be_ctx;
void *req_data;
be_async_callback_t fn;
void *pvt;
int restarts;
};
struct be_acct_req {
int entry_type;
int attr_type;
int filter_type;
char *filter_value;
};
struct be_sudo_req {
char *username;
};
bool be_is_offline(struct be_ctx *ctx);
void be_mark_offline(struct be_ctx *ctx);
int be_add_online_cb(TALLOC_CTX *mem_ctx,
struct be_ctx *ctx,
be_callback_t cb,
void *pvt,
struct be_cb **online_cb);
void be_run_online_cb(struct be_ctx *be);
int be_add_offline_cb(TALLOC_CTX *mem_ctx,
struct be_ctx *ctx,
be_callback_t cb,
void *pvt,
struct be_cb **online_cb);
void be_run_offline_cb(struct be_ctx *be);
/* from data_provider_fo.c */
enum be_fo_protocol {
BE_FO_PROTO_TCP,
BE_FO_PROTO_UDP,
BE_FO_PROTO_SENTINEL
};
typedef void (be_svc_callback_fn_t)(void *, struct fo_server *);
int be_init_failover(struct be_ctx *ctx);
int be_fo_is_srv_identifier(const char *server);
int be_fo_add_service(struct be_ctx *ctx, const char *service_name);
int be_fo_service_add_callback(TALLOC_CTX *memctx,
struct be_ctx *ctx, const char *service_name,
be_svc_callback_fn_t *fn, void *private_data);
int be_fo_get_server_count(struct be_ctx *ctx, const char *service_name);
int be_fo_add_srv_server(struct be_ctx *ctx, const char *service_name,
const char *query_service, enum be_fo_protocol proto,
bool proto_fallback, void *user_data);
int be_fo_add_server(struct be_ctx *ctx, const char *service_name,
const char *server, int port, void *user_data);
struct tevent_req *be_resolve_server_send(TALLOC_CTX *memctx,
struct tevent_context *ev,
struct be_ctx *ctx,
const char *service_name);
int be_resolve_server_recv(struct tevent_req *req, struct fo_server **srv);
/*
* Instruct fail-over to try next server on the next connect attempt.
* Should be used after connection to service was unexpectedly dropped
* but there is no authoritative information on whether active server is down.
*/
void be_fo_try_next_server(struct be_ctx *ctx, const char *service_name);
int be_fo_run_callbacks_at_next_request(struct be_ctx *ctx,
const char *service_name);
void reset_fo(struct be_ctx *be_ctx);
#endif /* __DP_BACKEND_H___ */
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