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kamailio/modules/avpops/avpops_db.c

428 lines
9.7 KiB

/*
* $Id$
*
* Copyright (C) 2004-2006 Voice Sistem SRL
*
* This file is part of Kamailio.
*
* 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:
* ---------
* 2004-10-04 first version (ramona)
* 2004-11-11 added support for db schemes for avp_db_load (ramona)
*/
#include <stdlib.h>
#include <string.h>
#include "../../mem/mem.h"
#include "../../mem/shm_mem.h"
#include "../../lib/srdb1/db.h"
#include "../../dprint.h"
#include "avpops_parse.h"
#include "avpops_db.h"
static db1_con_t *db_hdl=0; /* DB handler */
static db_func_t avpops_dbf; /* DB functions */
static str def_table; /* default DB table */
static str **db_columns; /* array with names of DB columns */
static db_key_t keys_cmp[3]; /* array of keys and values used in selection */
static db_val_t vals_cmp[3]; /* statement as in "select" and "delete" */
/* linked list with all defined DB schemes */
static struct db_scheme *db_scheme_list=0;
int avpops_db_bind(const str* db_url)
{
if (db_bind_mod(db_url, &avpops_dbf ))
{
LM_CRIT("cannot bind to database module! "
"Did you load a database module ?\n");
return -1;
}
if (!DB_CAPABILITY(avpops_dbf, DB_CAP_ALL))
{
LM_CRIT("database modules does not "
"provide all functions needed by avpops module\n");
return -1;
}
return 0;
}
int avpops_db_init(const str* db_url, const str* db_table, str** db_cols)
{
db_hdl = avpops_dbf.init(db_url);
if (db_hdl==0)
{
LM_ERR("cannot initialize database connection\n");
goto error;
}
if (avpops_dbf.use_table(db_hdl, db_table)<0)
{
LM_ERR("cannot select table \"%.*s\"\n", db_table->len, db_table->s);
goto error;
}
def_table.s = db_table->s;
def_table.len = db_table->len;
db_columns = db_cols;
return 0;
error:
if (db_hdl)
{
avpops_dbf.close(db_hdl);
db_hdl=0;
}
return -1;
}
int avp_add_db_scheme( modparam_t type, void* val)
{
struct db_scheme *scheme;
scheme = (struct db_scheme*)pkg_malloc( sizeof(struct db_scheme) );
if (scheme==0)
{
LM_ERR("no more pkg memory\n");
goto error;
}
memset( scheme, 0, sizeof(struct db_scheme));
/* parse the scheme */
if ( parse_avp_db_scheme( (char*)val, scheme)!=0 )
{
LM_ERR("failed to parse scheme\n");
goto error;
}
/* check for duplicates */
if ( avp_get_db_scheme(&scheme->name)!=0 )
{
LM_ERR("duplicated scheme name <%.*s>\n",
scheme->name.len,scheme->name.s);
goto error;
}
/* print scheme */
LM_DBG("new scheme <%.*s> added\n"
"\t\tuuid_col=<%.*s>\n\t\tusername_col=<%.*s>\n"
"\t\tdomain_col=<%.*s>\n\t\tvalue_col=<%.*s>\n"
"\t\tdb_flags=%d\n\t\ttable=<%.*s>\n",
scheme->name.len,scheme->name.s,
scheme->uuid_col.len, scheme->uuid_col.s, scheme->username_col.len,
scheme->username_col.s, scheme->domain_col.len, scheme->domain_col.s,
scheme->value_col.len, scheme->value_col.s, scheme->db_flags,
scheme->table.len, scheme->table.s);
scheme->next = db_scheme_list;
db_scheme_list = scheme;
return 0;
error:
return -1;
}
struct db_scheme *avp_get_db_scheme (str *name)
{
struct db_scheme *scheme;
for( scheme=db_scheme_list ; scheme ; scheme=scheme->next )
if ( name->len==scheme->name.len &&
!strcasecmp( name->s, scheme->name.s) )
return scheme;
return 0;
}
static inline int set_table( const str *table, char *func)
{
if (table && table->s)
{
if ( avpops_dbf.use_table( db_hdl, table)<0 )
{
LM_ERR("db-%s: cannot set table \"%.*s\"\n", func, table->len, table->s);
return -1;
}
} else {
if ( avpops_dbf.use_table( db_hdl, &def_table)<0 )
{
LM_ERR("db-%s: cannot set table \"%.*s\"\n", func, def_table.len, def_table.s);
return -1;
}
}
return 0;
}
static inline int prepare_selection( str *uuid, str *username, str *domain,
char *attr, struct db_scheme *scheme)
{
unsigned int nr_keys_cmp;
nr_keys_cmp = 0;
if (uuid)
{
/* uuid column */
keys_cmp[ nr_keys_cmp ] =
(scheme&&scheme->uuid_col.s)?&scheme->uuid_col:db_columns[0];
vals_cmp[ nr_keys_cmp ].type = DB1_STR;
vals_cmp[ nr_keys_cmp ].nul = 0;
vals_cmp[ nr_keys_cmp ].val.str_val = *uuid;
nr_keys_cmp++;
} else {
if (username)
{
/* username column */
keys_cmp[ nr_keys_cmp ] =
(scheme&&scheme->username_col.s)?&scheme->username_col:db_columns[4];
vals_cmp[ nr_keys_cmp ].type = DB1_STR;
vals_cmp[ nr_keys_cmp ].nul = 0;
vals_cmp[ nr_keys_cmp ].val.str_val = *username;
nr_keys_cmp++;
}
if (domain)
{
/* domain column */
keys_cmp[ nr_keys_cmp ] =
(scheme&&scheme->domain_col.s)?&scheme->domain_col:db_columns[5];
vals_cmp[ nr_keys_cmp ].type = DB1_STR;
vals_cmp[ nr_keys_cmp ].nul = 0;
vals_cmp[ nr_keys_cmp ].val.str_val = *domain;
nr_keys_cmp++;
}
}
if (attr && scheme==0)
{
/* attribute name column */
keys_cmp[ nr_keys_cmp ] = db_columns[1];
vals_cmp[ nr_keys_cmp ].type = DB1_STRING;
vals_cmp[ nr_keys_cmp ].nul = 0;
vals_cmp[ nr_keys_cmp ].val.string_val = attr;
nr_keys_cmp++;
}
return nr_keys_cmp;
}
db1_res_t *db_load_avp( str *uuid, str *username, str *domain,
char *attr, const str *table, struct db_scheme *scheme)
{
static db_key_t keys_ret[3];
unsigned int nr_keys_cmp;
unsigned int nr_keys_ret;
db1_res_t *res = NULL;
/* prepare DB query */
nr_keys_cmp = prepare_selection( uuid, username, domain, attr, scheme);
/* set table */
if (set_table( scheme?&scheme->table:table ,"load")!=0)
return 0;
/* return keys */
if (scheme==0)
{
keys_ret[0] = db_columns[2]; /*value*/
keys_ret[1] = db_columns[1]; /*attribute*/
keys_ret[2] = db_columns[3]; /*type*/
nr_keys_ret = 3;
} else {
/* value */
keys_ret[0] = scheme->value_col.s?&scheme->value_col:db_columns[2];
nr_keys_ret = 1;
}
/* do the DB query */
if ( avpops_dbf.query( db_hdl, keys_cmp, 0/*op*/, vals_cmp, keys_ret,
nr_keys_cmp, nr_keys_ret, 0/*order*/, &res) < 0)
return 0;
return res;
}
void db_close_query( db1_res_t *res )
{
LM_DBG("close avp query\n");
avpops_dbf.free_result( db_hdl, res);
}
int db_store_avp( db_key_t *keys, db_val_t *vals, int n, const str *table)
{
int r;
if (set_table( table ,"store")!=0)
return -1;
r = avpops_dbf.insert( db_hdl, keys, vals, n);
if (r<0)
{
LM_ERR("insert failed\n");
return -1;
}
return 0;
}
int db_delete_avp( str *uuid, str *username, str *domain, char *attr,
const str *table)
{
unsigned int nr_keys_cmp;
/* prepare DB query */
nr_keys_cmp = prepare_selection( uuid, username, domain, attr, 0);
/* set table */
if (set_table( table ,"delete")!=0)
return -1;
/* do the DB query */
if ( avpops_dbf.delete( db_hdl, keys_cmp, 0, vals_cmp, nr_keys_cmp) < 0)
return 0;
return 0;
}
int db_query_avp(struct sip_msg *msg, char *query, pvname_list_t* dest)
{
int_str avp_val;
int_str avp_name;
unsigned short avp_type;
db1_res_t* db_res = NULL;
int i, j;
pvname_list_t* crt;
static str query_str;
if(query==NULL)
{
LM_ERR("bad parameter\n");
return -1;
}
query_str.s = query;
query_str.len = strlen(query);
if(avpops_dbf.raw_query(db_hdl, &query_str, &db_res)!=0)
{
LM_ERR("cannot do the query\n");
return -1;
}
if(db_res==NULL || RES_ROW_N(db_res)<=0 || RES_COL_N(db_res)<=0)
{
LM_DBG("no result after query\n");
db_close_query( db_res );
return -2;
}
LM_DBG("rows [%d]\n", RES_ROW_N(db_res));
/* reverse order of rows so that first row get's in front of avp list */
for(i = RES_ROW_N(db_res)-1; i >= 0; i--)
{
LM_DBG("row [%d]\n", i);
crt = dest;
for(j = 0; j < RES_COL_N(db_res); j++)
{
if(RES_ROWS(db_res)[i].values[j].nul)
goto next_avp;
avp_type = 0;
if(crt==NULL)
{
avp_name.n = j+1;
} else {
if(pv_get_avp_name(msg, &crt->sname.pvp, &avp_name,
&avp_type)!=0)
{
LM_ERR("cant get avp name [%d/%d]\n", i, j);
goto next_avp;
}
}
switch(RES_ROWS(db_res)[i].values[j].type)
{
case DB1_STRING:
avp_type |= AVP_VAL_STR;
avp_val.s.s=
(char*)RES_ROWS(db_res)[i].values[j].val.string_val;
avp_val.s.len=strlen(avp_val.s.s);
if(avp_val.s.len<=0)
goto next_avp;
break;
case DB1_STR:
avp_type |= AVP_VAL_STR;
avp_val.s.len=
RES_ROWS(db_res)[i].values[j].val.str_val.len;
avp_val.s.s=
(char*)RES_ROWS(db_res)[i].values[j].val.str_val.s;
if(avp_val.s.len<=0)
goto next_avp;
break;
case DB1_BLOB:
avp_type |= AVP_VAL_STR;
avp_val.s.len=
RES_ROWS(db_res)[i].values[j].val.blob_val.len;
avp_val.s.s=
(char*)RES_ROWS(db_res)[i].values[j].val.blob_val.s;
if(avp_val.s.len<=0)
goto next_avp;
break;
case DB1_INT:
avp_val.n
= (int)RES_ROWS(db_res)[i].values[j].val.int_val;
break;
case DB1_DATETIME:
avp_val.n
= (int)RES_ROWS(db_res)[i].values[j].val.time_val;
break;
case DB1_BITMAP:
avp_val.n
= (int)RES_ROWS(db_res)[i].values[j].val.bitmap_val;
break;
default:
goto next_avp;
}
if(add_avp(avp_type, avp_name, avp_val)!=0)
{
LM_ERR("unable to add avp\n");
db_close_query( db_res );
return -1;
}
next_avp:
if(crt)
{
crt = crt->next;
if(crt==NULL)
break;
}
}
}
db_close_query( db_res );
return 0;
}