alias_db.c

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/* 
 * $Id: alias_db.c 4657 2008-08-10 22:51:44Z henningw $
 *
 * ALIAS_DB Module
 *
 * Copyright (C) 2004 Voice Sistem SRL
 *
 * This file is part of a module for Kamailio, a free SIP server.
 *
 * Kamailio 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 2 of the License, or
 * (at your option) any later version
 *
 * Kamailio 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, write to the Free Software 
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * History:
 * --------
 * 2004-09-01: first version (ramona)
 */


#include <stdio.h>
#include <string.h>
#include "../../sr_module.h"
#include "../../db/db.h"
#include "../../dprint.h"
#include "../../error.h"
#include "../../mem/mem.h"
#include "../../ut.h"
#include "../../mod_fix.h"

#include "alookup.h"

MODULE_VERSION


/* Module destroy function prototype */
static void destroy(void);


/* Module child-init function prototype */
static int child_init(int rank);


/* Module initialization function prototype */
static int mod_init(void);


/* Module parameter variables */
static str db_url       = str_init(DEFAULT_RODB_URL);
str user_column         = str_init("username");
str domain_column       = str_init("domain");
str alias_user_column   = str_init("alias_username");
str alias_domain_column = str_init("alias_domain");
str domain_prefix       = {NULL, 0};
int use_domain          = 0;
int ald_append_branches = 0;

db_con_t* db_handle;   /* Database connection handle */
db_func_t adbf;  /* DB functions */

/* Exported functions */
static cmd_export_t cmds[] = {
   {"alias_db_lookup", (cmd_function)alias_db_lookup, 1, fixup_spve_null, 0,
      REQUEST_ROUTE|FAILURE_ROUTE},
   {0, 0, 0, 0, 0, 0}
};


/* Exported parameters */
static param_export_t params[] = {
   {"db_url",              STR_PARAM, &db_url.s        },
   {"user_column",         STR_PARAM, &user_column.s   },
   {"domain_column",       STR_PARAM, &domain_column.s },
   {"alias_user_column",   STR_PARAM, &alias_user_column.s   },
   {"alias_domain_column", STR_PARAM, &alias_domain_column.s },
   {"use_domain",          INT_PARAM, &use_domain      },
   {"domain_prefix",       STR_PARAM, &domain_prefix.s },
   {"append_branches",     INT_PARAM, &ald_append_branches   },
   {0, 0, 0}
};


/* Module interface */
struct module_exports exports = {
   "alias_db",
   DEFAULT_DLFLAGS, /* dlopen flags */
   cmds,       /* Exported functions */
   params,     /* Exported parameters */
   0,          /* exported statistics */
   0,          /* exported MI functions */
   0,          /* exported pseudo-variables */
   0,          /* extra processes */
   mod_init,   /* module initialization function */
   0,          /* response function */
   destroy,    /* destroy function */
   child_init  /* child initialization function */
};


/**
 *
 */
static int child_init(int rank)
{
   db_handle = adbf.init(&db_url);
   if (!db_handle)
   {
      LM_ERR("unable to connect database\n");
      return -1;
   }
   return 0;

}


/**
 *
 */
static int mod_init(void)
{
   db_url.len = strlen(db_url.s);
   user_column.len = strlen(user_column.s);
   domain_column.len = strlen(domain_column.s);
   alias_domain_column.len = strlen(alias_domain_column.s);
   alias_user_column.len = strlen(alias_user_column.s);
   if (domain_prefix.s)
      domain_prefix.len = strlen(domain_prefix.s);

    /* Find a database module */
   if (db_bind_mod(&db_url, &adbf))
   {
      LM_ERR("unable to bind database module\n");
      return -1;
   }
   if (!DB_CAPABILITY(adbf, DB_CAP_QUERY))
   {
      LM_CRIT("database modules does not "
         "provide all functions needed by avpops module\n");
      return -1;
   }

   return 0;
}


/**
 *
 */
static void destroy(void)
{
   if (db_handle) {
      adbf.close(db_handle);
      db_handle = 0;
   }
}