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kamailio/modules/db_text/dbt_base.c

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/*
* DBText module core functions
*
* Copyright (C) 2001-2003 FhG Fokus
*
* This file is part of 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
#include <string.h>
#include "../../str.h"
#include "../../mem/mem.h"
#include "../../mem/shm_mem.h"
#include "dbtext.h"
#include "dbt_res.h"
#include "dbt_api.h"
#ifndef CFG_DIR
#define CFG_DIR "/tmp"
#endif
#define DBT_ID "text://"
#define DBT_ID_LEN (sizeof(DBT_ID)-1)
#define DBT_PATH_LEN 256
/*
* Initialize database connection
*/
db1_con_t* dbt_init(const str* _sqlurl)
{
db1_con_t* _res;
str _s;
char dbt_path[DBT_PATH_LEN];
if (!_sqlurl || !_sqlurl->s)
{
LM_ERR("invalid parameter value\n");
return NULL;
}
_s.s = _sqlurl->s;
_s.len = _sqlurl->len;
if(_s.len <= DBT_ID_LEN || strncmp(_s.s, DBT_ID, DBT_ID_LEN)!=0)
{
LM_ERR("invalid database URL - should be:"
" <%s[/]path/to/directory> Current: %s\n", DBT_ID, _s.s);
return NULL;
}
/*
* it would be possible to use the _sqlurl here, but the core API is
* defined with a const str*, so this code would be not valid.
*/
_s.s += DBT_ID_LEN;
_s.len -= DBT_ID_LEN;
if(_s.s[0]!='/')
{
if(sizeof(CFG_DIR)+_s.len+2 > DBT_PATH_LEN)
{
LM_ERR("path to database is too long\n");
return NULL;
}
strcpy(dbt_path, CFG_DIR);
dbt_path[sizeof(CFG_DIR)] = '/';
strncpy(&dbt_path[sizeof(CFG_DIR)+1], _s.s, _s.len);
_s.len += sizeof(CFG_DIR);
_s.s = dbt_path;
}
_res = pkg_malloc(sizeof(db1_con_t)+sizeof(dbt_con_t));
if (!_res)
{
LM_ERR("no pkg memory left\n");
return NULL;
}
memset(_res, 0, sizeof(db1_con_t) + sizeof(dbt_con_t));
_res->tail = (unsigned long)((char*)_res+sizeof(db1_con_t));
LM_INFO("using database at: %.*s\n", _s.len, _s.s);
DBT_CON_CONNECTION(_res) = dbt_cache_get_db(&_s);
if (!DBT_CON_CONNECTION(_res))
{
LM_ERR("cannot get the link to database\n");
return NULL;
}
return _res;
}
/*
* Close a database connection
*/
void dbt_close(db1_con_t* _h)
{
if (!_h)
{
LM_ERR("invalid parameter value\n");
return;
}
pkg_free(_h);
return;
}
/*
* Free all memory allocated by get_result
*/
int dbt_free_result(db1_con_t* _h, db1_res_t* _r)
{
if ((!_h))
{
LM_ERR("invalid parameter value\n");
return -1;
}
if (!_r)
return 0;
if(dbt_result_free(_h, (dbt_table_p)_r->ptr) < 0)
{
LM_ERR("unable to free internal structure\n");
}
if(db_free_result(_r) < 0)
{
LM_ERR("unable to free result structure\n");
return -1;
}
return 0;
}
static dbt_table_p last_temp_table = NULL;
/*
* Query table for specified rows
* _h: structure representing database connection
* _k: key names
* _op: operators
* _v: values of the keys that must match
* _c: column names to return
* _n: number of key=values pairs to compare
* _nc: number of columns to return
* _o: order by the specified column
*/
int dbt_query(db1_con_t* _h, db_key_t* _k, db_op_t* _op, db_val_t* _v,
db_key_t* _c, int _n, int _nc, db_key_t _o, db1_res_t** _r)
{
dbt_table_p _tbc = NULL;
dbt_table_p _tbc_temp = NULL;
dbt_row_p _drp = NULL;
dbt_row_p *_res = NULL;
// dbt_result_p _dres = NULL;
int result = 0;
int counter = 0;
int i=0;
int *lkey=NULL, *lres=NULL;
db_key_t *_o_k=NULL; /* columns in order-by */
char *_o_op=NULL; /* operators for oder-by */
int _o_n; /* no of elements in order-by */
int *_o_l=NULL; /* column selection for order-by */
// int _o_nc; /* no of elements in _o_l but not lres */
if(_r)
*_r = NULL;
if ((!_h) || !CON_TABLE(_h))
{
LM_ERR("invalid parameters\n");
return -1;
}
if (_o)
{
if (dbt_parse_orderbyclause(&_o_k, &_o_op, &_o_n, _o) < 0)
return -1;
}
_tbc_temp = dbt_db_get_temp_table(DBT_CON_CONNECTION(_h));
if(!_tbc_temp)
{
LM_ERR("unable to allocate temp table\n");
return -1;
}
/* lock database */
_tbc = dbt_db_get_table(DBT_CON_CONNECTION(_h), CON_TABLE(_h));
if(!_tbc)
{
LM_ERR("table %.*s does not exist!\n", CON_TABLE(_h)->len, CON_TABLE(_h)->s);
dbt_db_del_table(DBT_CON_CONNECTION(_h), &_tbc_temp->name, 0);
return -1;
}
if(!_tbc || _tbc->nrcols < _nc)
{
LM_ERR("table %s not loaded! (too few columns)\n", CON_TABLE(_h)->s);
goto error;
}
if(_k)
{
lkey = dbt_get_refs(_tbc, _k, _n);
if(!lkey)
goto error;
}
if(_c)
{
lres = dbt_get_refs(_tbc, _c, _nc);
if(!lres)
goto error;
}
if(_o_k)
{
_o_l = dbt_get_refs(_tbc, _o_k, _o_n);
if (!_o_l)
goto error;
/* enlarge select-columns lres by all order-by columns, _o_nc is how many */
// if (dbt_mangle_columnselection(&lres, &_nc, &_o_nc, _o_l, _o_n) < 0)
// goto error;
}
/*
LM_DBG("new res with %d cols\n", _nc);
_dres = dbt_result_new(_tbc, lres, _nc);
if(!_dres)
goto error;
*/
dbt_column_p pPrevCol = NULL;
_tbc_temp->colv = (dbt_column_p*) shm_malloc(_nc*sizeof(dbt_column_p));
for(i=0; i < _nc; i++) {
dbt_column_p pCol = dbt_column_new(_tbc->colv[ lres[i] ]->name.s, _tbc->colv[ lres[i] ]->name.len);
pCol->type = _tbc->colv[ lres[i] ]->type;
pCol->flag = _tbc->colv[ lres[i] ]->flag;
if(pPrevCol)
{
pCol->prev = pPrevCol;
pPrevCol->next = pCol;
}
else
_tbc_temp->cols = pCol;
_tbc_temp->colv[i] = pCol;
pPrevCol = pCol;
_tbc_temp->nrcols++;
}
_res = (dbt_row_p*) pkg_malloc(_db_text_max_result_rows * sizeof(dbt_row_p));
if(!_res) {
LM_ERR("no more space to allocate for query rows\n");
goto error;
}
_drp = _tbc->rows;
while(_drp && counter < _db_text_max_result_rows)
{
if(dbt_row_match(_tbc, _drp, lkey, _op, _v, _n))
{
_res[counter] = _drp;
// if(dbt_result_extract_fields(_tbc, _drp, lres, _dres))
// {
// LM_ERR("failed to extract result fields!\n");
// goto clean;
// }
counter++;
}
_drp = _drp->next;
}
if (_o_l)
{
if (counter > 1)
{
if (dbt_sort_result_temp(_res, counter, _o_l, _o_op, _o_n) < 0)
goto error;
}
/* last but not least, remove surplus columns */
// if (_o_nc)
// dbt_project_result(_dres, _o_nc);
}
// copy results to temp table
_tbc_temp->rows = dbt_result_extract_results(_tbc, _res, counter, lres, _nc);
_tbc_temp->nrrows = (_tbc_temp->rows == NULL ? 0 : counter);
dbt_table_update_flags(_tbc, DBT_TBFL_ZERO, DBT_FL_IGN, 1);
/* unlock database */
dbt_release_table(DBT_CON_CONNECTION(_h), CON_TABLE(_h));
// DBT_CON_TEMP_TABLE(_h) = _tbc_temp;
last_temp_table = _tbc_temp;
// dbt_release_table(DBT_CON_CONNECTION(_h), &_tbc_temp->name);
// dbt_result_print(_tbc_temp);
if(lkey)
pkg_free(lkey);
if(lres)
pkg_free(lres);
if(_o_k)
pkg_free(_o_k);
if(_o_op)
pkg_free(_o_op);
if(_o_l)
pkg_free(_o_l);
if(_res)
pkg_free(_res);
if(_r) {
result = dbt_get_result(_r, _tbc_temp);
// dbt_db_del_table(DBT_CON_CONNECTION(_h), &_tbc_temp->name, 1);
if(result != 0)
dbt_result_free(_h, _tbc_temp);
}
return result;
error:
/* unlock database */
dbt_release_table(DBT_CON_CONNECTION(_h), CON_TABLE(_h));
/* delete temp table */
dbt_db_del_table(DBT_CON_CONNECTION(_h), &_tbc_temp->name, 1);
if(_res)
pkg_free(_res);
if(lkey)
pkg_free(lkey);
if(lres)
pkg_free(lres);
if(_o_k)
pkg_free(_o_k);
if(_o_op)
pkg_free(_o_op);
if(_o_l)
pkg_free(_o_l);
LM_ERR("failed to query the table!\n");
return -1;
/*
clean:
dbt_release_table(DBT_CON_CONNECTION(_h), CON_TABLE(_h));
if(lkey)
pkg_free(lkey);
if(lres)
pkg_free(lres);
if(_o_k)
pkg_free(_o_k);
if(_o_op)
pkg_free(_o_op);
if(_o_l)
pkg_free(_o_l);
return -1;
*/
}
int dbt_fetch_result(db1_con_t* _h, db1_res_t** _r, const int nrows)
{
int rows;
if (!_h || !_r || nrows < 0) {
LM_ERR("Invalid parameter value\n");
return -1;
}
/* exit if the fetch count is zero */
if (nrows == 0) {
dbt_free_result(_h, *_r);
*_r = 0;
return 0;
}
if(*_r==0) {
/* Allocate a new result structure */
dbt_init_result(_r, last_temp_table);
} else {
/* free old rows */
if(RES_ROWS(*_r)!=0)
db_free_rows(*_r);
RES_ROWS(*_r) = 0;
RES_ROW_N(*_r) = 0;
}
/* determine the number of rows remaining to be processed */
rows = RES_NUM_ROWS(*_r) - RES_LAST_ROW(*_r);
/* If there aren't any more rows left to process, exit */
if(rows<=0)
return 0;
/* if the fetch count is less than the remaining rows to process */
/* set the number of rows to process (during this call) equal to the fetch count */
if(nrows < rows)
rows = nrows;
RES_ROW_N(*_r) = rows;
return dbt_get_next_result(_r, RES_LAST_ROW(*_r), rows);
}
/*
* Affected Rows
*/
int dbt_affected_rows(db1_con_t* _h)
{
if (!_h || !CON_TABLE(_h))
{
LM_ERR("invalid parameter\n");
return -1;
}
return ((dbt_con_p)_h->tail)->affected;
}
/*
* Insert a row into table
*/
int dbt_insert(db1_con_t* _h, db_key_t* _k, db_val_t* _v, int _n)
{
dbt_table_p _tbc = NULL;
dbt_row_p _drp = NULL;
int *lkey=NULL, i, j;
if (!_h || !CON_TABLE(_h))
{
LM_ERR("invalid parameter\n");
return -1;
}
((dbt_con_p)_h->tail)->affected = 0;
if(!_k || !_v || _n<=0)
{
LM_ERR("no key-value to insert\n");
return -1;
}
/* lock database */
_tbc = dbt_db_get_table(DBT_CON_CONNECTION(_h), CON_TABLE(_h));
if(!_tbc)
{
LM_ERR("table %.*s does not exist!\n", CON_TABLE(_h)->len, CON_TABLE(_h)->s);
return -1;
}
if(_tbc->nrcols<_n)
{
LM_ERR("more values than columns!!\n");
goto error;
}
if(_k)
{
lkey = dbt_get_refs(_tbc, _k, _n);
if(!lkey)
goto error;
}
_drp = dbt_row_new(_tbc->nrcols);
if(!_drp)
{
LM_ERR("no shm memory for a new row!!\n");
goto error;
}
for(i=0; i<_n; i++)
{
j = (lkey)?lkey[i]:i;
if(dbt_is_neq_type(_tbc->colv[j]->type, _v[i].type))
{
LM_ERR("incompatible types v[%d] - c[%d]!\n", i, j);
goto clean;
}
if(_v[i].type == DB1_STRING && !_v[i].nul)
_v[i].val.str_val.len = strlen(_v[i].val.string_val);
if(dbt_row_set_val(_drp, &(_v[i]), _tbc->colv[j]->type, j))
{
LM_ERR("cannot set v[%d] in c[%d]!\n", i, j);
goto clean;
}
}
if(dbt_table_add_row(_tbc, _drp))
{
LM_ERR("cannot insert the new row!!\n");
goto clean;
}
((dbt_con_p)_h->tail)->affected = 1;
/* dbt_print_table(_tbc, NULL); */
/* unlock databse */
dbt_release_table(DBT_CON_CONNECTION(_h), CON_TABLE(_h));
if(lkey)
pkg_free(lkey);
return 0;
error:
/* unlock database */
dbt_release_table(DBT_CON_CONNECTION(_h), CON_TABLE(_h));
if(lkey)
pkg_free(lkey);
LM_ERR("failed to insert row in table!\n");
return -1;
clean:
if(lkey)
pkg_free(lkey);
if(_drp) // free row
dbt_row_free(_tbc, _drp);
/* unlock database */
dbt_release_table(DBT_CON_CONNECTION(_h), CON_TABLE(_h));
return -1;
}
/*
* Delete a row from table
*/
int dbt_delete(db1_con_t* _h, db_key_t* _k, db_op_t* _o, db_val_t* _v, int _n)
{
dbt_table_p _tbc = NULL;
dbt_row_p _drp = NULL, _drp0 = NULL;
int *lkey = NULL;
if (!_h || !CON_TABLE(_h))
{
LM_ERR("invalid parameters\n");
return -1;
}
((dbt_con_p)_h->tail)->affected = 0;
/* lock database */
_tbc = dbt_db_get_table(DBT_CON_CONNECTION(_h), CON_TABLE(_h));
if(!_tbc)
{
LM_ERR("failed to load table <%.*s>!\n", CON_TABLE(_h)->len,
CON_TABLE(_h)->s);
return -1;
}
if(!_k || !_v || _n<=0)
{
LM_DBG("deleting all records\n");
((dbt_con_p)_h->tail)->affected = _tbc->nrrows;
dbt_table_free_rows(_tbc);
/* unlock databse */
dbt_release_table(DBT_CON_CONNECTION(_h), CON_TABLE(_h));
return 0;
}
lkey = dbt_get_refs(_tbc, _k, _n);
if(!lkey)
goto error;
_drp = _tbc->rows;
while(_drp)
{
_drp0 = _drp->next;
if(dbt_row_match(_tbc, _drp, lkey, _o, _v, _n))
{
// delete row
if(_drp->prev)
(_drp->prev)->next = _drp->next;
else
_tbc->rows = _drp->next;
if(_drp->next)
(_drp->next)->prev = _drp->prev;
_tbc->nrrows--;
// free row
dbt_row_free(_tbc, _drp);
((dbt_con_p)_h->tail)->affected++;
}
_drp = _drp0;
}
if( ((dbt_con_p)_h->tail)->affected )
dbt_table_update_flags(_tbc, DBT_TBFL_MODI, DBT_FL_SET, 1);
/* dbt_print_table(_tbc, NULL); */
/* unlock database */
dbt_release_table(DBT_CON_CONNECTION(_h), CON_TABLE(_h));
if(lkey)
pkg_free(lkey);
return 0;
error:
/* unlock database */
dbt_release_table(DBT_CON_CONNECTION(_h), CON_TABLE(_h));
LM_ERR("failed to delete from table!\n");
return -1;
}
/*
* Update a row in table
*/
int dbt_update(db1_con_t* _h, db_key_t* _k, db_op_t* _o, db_val_t* _v,
db_key_t* _uk, db_val_t* _uv, int _n, int _un)
{
dbt_table_p _tbc = NULL;
dbt_row_p _drp = NULL;
int i;
int *lkey=NULL, *lres=NULL;
if (!_h || !CON_TABLE(_h) || !_uk || !_uv || _un <= 0)
{
LM_ERR("invalid parameters\n");
return -1;
}
((dbt_con_p)_h->tail)->affected = 0;
/* lock database */
_tbc = dbt_db_get_table(DBT_CON_CONNECTION(_h), CON_TABLE(_h));
if(!_tbc)
{
LM_ERR("table %.*s does not exist!\n", CON_TABLE(_h)->len, CON_TABLE(_h)->s);
return -1;
}
if(_k)
{
lkey = dbt_get_refs(_tbc, _k, _n);
if(!lkey)
goto error;
}
lres = dbt_get_refs(_tbc, _uk, _un);
if(!lres)
goto error;
_drp = _tbc->rows;
while(_drp)
{
if(dbt_row_match(_tbc, _drp, lkey, _o, _v, _n))
{ // update fields
for(i=0; i<_un; i++)
{
if(dbt_is_neq_type(_tbc->colv[lres[i]]->type, _uv[i].type))
{
LM_ERR("incompatible types!\n");
goto error;
}
if(dbt_row_update_val(_drp, &(_uv[i]),
_tbc->colv[lres[i]]->type, lres[i]))
{
LM_ERR("cannot set v[%d] in c[%d]!\n",
i, lres[i]);
goto error;
}
}
((dbt_con_p)_h->tail)->affected++;
}
_drp = _drp->next;
}
if( ((dbt_con_p)_h->tail)->affected )
dbt_table_update_flags(_tbc, DBT_TBFL_MODI, DBT_FL_SET, 1);
/* dbt_print_table(_tbc, NULL); */
/* unlock database */
dbt_release_table(DBT_CON_CONNECTION(_h), CON_TABLE(_h));
if(lkey)
pkg_free(lkey);
if(lres)
pkg_free(lres);
return 0;
error:
/* unlock database */
dbt_release_table(DBT_CON_CONNECTION(_h), CON_TABLE(_h));
if(lkey)
pkg_free(lkey);
if(lres)
pkg_free(lres);
LM_ERR("failed to update the table!\n");
return -1;
}
int dbt_replace(db1_con_t* _h, db_key_t* _k, db_val_t* _v,
int _n, int _nk, int _m)
{
dbt_table_p _tbc = NULL;
dbt_row_p _drp = NULL;
int i, j;
int *lkey=NULL, *lres=NULL;
if (!_h || !CON_TABLE(_h) || _nk <= 0)
{
LM_ERR("invalid parameters\n");
return -1;
}
((dbt_con_p)_h->tail)->affected = 0;
/* lock database */
_tbc = dbt_db_get_table(DBT_CON_CONNECTION(_h), CON_TABLE(_h));
if(!_tbc)
{
LM_ERR("table %.*s does not exist!\n", CON_TABLE(_h)->len, CON_TABLE(_h)->s);
return -1;
}
if(_k)
{
lkey = dbt_get_refs(_tbc, _k, _nk);
if(!lkey)
goto error;
}
lres = dbt_get_refs(_tbc, _k, _n);
if(!lres)
goto error;
_drp = _tbc->rows;
while(_drp)
{
if(dbt_row_match(_tbc, _drp, lkey, NULL, _v, _nk))
{ // update fields
for(i=0; i<_n; i++)
{
if(dbt_is_neq_type(_tbc->colv[lres[i]]->type, _v[i].type))
{
LM_ERR("incompatible types!\n");
goto error;
}
if(dbt_row_update_val(_drp, &(_v[i]),
_tbc->colv[lres[i]]->type, lres[i]))
{
LM_ERR("cannot set v[%d] in c[%d]!\n",
i, lres[i]);
goto error;
}
}
((dbt_con_p)_h->tail)->affected++;
break;
}
_drp = _drp->next;
}
if(((dbt_con_p)_h->tail)->affected == 0) {
_drp = dbt_row_new(_tbc->nrcols);
if(!_drp)
{
LM_ERR("no shm memory for a new row!!\n");
goto error;
}
for(i=0; i<_n; i++)
{
j = lres[i];
if(dbt_is_neq_type(_tbc->colv[j]->type, _v[i].type))
{
LM_ERR("incompatible types v[%d] - c[%d]!\n", i, j);
goto error;
}
if(_v[i].type == DB1_STRING && !_v[i].nul)
_v[i].val.str_val.len = strlen(_v[i].val.string_val);
if(dbt_row_set_val(_drp, &(_v[i]), _tbc->colv[j]->type, j))
{
LM_ERR("cannot set v[%d] in c[%d]!\n", i, j);
goto error;
}
}
if(dbt_table_add_row(_tbc, _drp))
{
LM_ERR("cannot insert the new row!!\n");
goto error;
}
((dbt_con_p)_h->tail)->affected = 1;
}
if( ((dbt_con_p)_h->tail)->affected )
dbt_table_update_flags(_tbc, DBT_TBFL_MODI, DBT_FL_SET, 1);
/* dbt_print_table(_tbc, NULL); */
/* unlock database */
dbt_release_table(DBT_CON_CONNECTION(_h), CON_TABLE(_h));
if(lkey)
pkg_free(lkey);
if(lres)
pkg_free(lres);
return 0;
error:
if(lkey)
pkg_free(lkey);
if(lres)
pkg_free(lres);
if(_drp) // free row
dbt_row_free(_tbc, _drp);
/* unlock database */
dbt_release_table(DBT_CON_CONNECTION(_h), CON_TABLE(_h));
LM_ERR("failed to update the table!\n");
return -1;
}
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