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dis-bench / src /php /php-src /ext /pdo_odbc /odbc_driver.c
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/*
+----------------------------------------------------------------------+
| Copyright (c) The PHP Group |
+----------------------------------------------------------------------+
| This source file is subject to version 3.01 of the PHP license, |
| that is bundled with this package in the file LICENSE, and is |
| available through the world-wide-web at the following url: |
| https://www.php.net/license/3_01.txt |
| If you did not receive a copy of the PHP license and are unable to |
| obtain it through the world-wide-web, please send a note to |
| license@php.net so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
| Author: Wez Furlong <wez@php.net> |
+----------------------------------------------------------------------+
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include "php.h"
#include "php_ini.h"
#include "ext/standard/info.h"
#include "ext/pdo/php_pdo.h"
#include "ext/pdo/php_pdo_driver.h"
/* this file actually lives in main/ */
#include "php_odbc_utils.h"
#include "php_pdo_odbc.h"
#include "php_pdo_odbc_int.h"
#include "zend_exceptions.h"
static void pdo_odbc_fetch_error_func(pdo_dbh_t *dbh, pdo_stmt_t *stmt, zval *info)
{
pdo_odbc_db_handle *H = (pdo_odbc_db_handle *)dbh->driver_data;
pdo_odbc_errinfo *einfo = &H->einfo;
pdo_odbc_stmt *S = NULL;
zend_string *message = NULL;
if (stmt) {
S = (pdo_odbc_stmt*)stmt->driver_data;
einfo = &S->einfo;
}
/* If we don't have a driver error do not populate the info array */
if (strlen(einfo->last_err_msg) == 0) {
return;
}
message = strpprintf(0, "%s (%s[%ld] at %s:%d)",
einfo->last_err_msg,
einfo->what, (long) einfo->last_error,
einfo->file, einfo->line);
add_next_index_long(info, einfo->last_error);
add_next_index_str(info, message);
add_next_index_string(info, einfo->last_state);
}
void pdo_odbc_error(pdo_dbh_t *dbh, pdo_stmt_t *stmt, PDO_ODBC_HSTMT statement, char *what, const char *file, int line) /* {{{ */
{
SQLRETURN rc;
SQLSMALLINT errmsgsize = 0;
SQLHANDLE eh;
SQLSMALLINT htype, recno = 1;
pdo_odbc_db_handle *H = (pdo_odbc_db_handle*)dbh->driver_data;
pdo_odbc_errinfo *einfo = &H->einfo;
pdo_odbc_stmt *S = NULL;
pdo_error_type *pdo_err = &dbh->error_code;
if (stmt) {
S = (pdo_odbc_stmt*)stmt->driver_data;
einfo = &S->einfo;
pdo_err = &stmt->error_code;
}
if (statement == SQL_NULL_HSTMT && S) {
statement = S->stmt;
}
if (statement) {
htype = SQL_HANDLE_STMT;
eh = statement;
} else if (H->dbc) {
htype = SQL_HANDLE_DBC;
eh = H->dbc;
} else {
htype = SQL_HANDLE_ENV;
eh = H->env;
}
rc = SQLGetDiagRec(htype, eh, recno++, (SQLCHAR *) einfo->last_state, &einfo->last_error,
(SQLCHAR *) einfo->last_err_msg, sizeof(einfo->last_err_msg)-1, &errmsgsize);
if (rc != SQL_SUCCESS && rc != SQL_SUCCESS_WITH_INFO) {
errmsgsize = 0;
}
einfo->last_err_msg[errmsgsize] = '\0';
einfo->file = file;
einfo->line = line;
einfo->what = what;
strcpy(*pdo_err, einfo->last_state);
/* printf("@@ SQLSTATE[%s] %s\n", *pdo_err, einfo->last_err_msg); */
if (!dbh->methods) {
zend_throw_exception_ex(php_pdo_get_exception(), einfo->last_error, "SQLSTATE[%s] %s: %d %s",
*pdo_err, what, einfo->last_error, einfo->last_err_msg);
}
/* just like a cursor, once you start pulling, you need to keep
* going until the end; SQL Server (at least) will mess with the
* actual cursor state if you don't finish retrieving all the
* diagnostic records (which can be generated by PRINT statements
* in the query, for instance). */
while (rc == SQL_SUCCESS || rc == SQL_SUCCESS_WITH_INFO) {
SQLCHAR discard_state[6];
SQLCHAR discard_buf[1024];
SQLINTEGER code;
rc = SQLGetDiagRec(htype, eh, recno++, discard_state, &code,
discard_buf, sizeof(discard_buf)-1, &errmsgsize);
}
}
/* }}} */
static void odbc_handle_closer(pdo_dbh_t *dbh)
{
pdo_odbc_db_handle *H = (pdo_odbc_db_handle*)dbh->driver_data;
if (H->dbc != SQL_NULL_HANDLE) {
SQLEndTran(SQL_HANDLE_DBC, H->dbc, SQL_ROLLBACK);
SQLDisconnect(H->dbc);
SQLFreeHandle(SQL_HANDLE_DBC, H->dbc);
H->dbc = NULL;
}
SQLFreeHandle(SQL_HANDLE_ENV, H->env);
H->env = NULL;
pefree(H, dbh->is_persistent);
dbh->driver_data = NULL;
}
static bool odbc_handle_preparer(pdo_dbh_t *dbh, zend_string *sql, pdo_stmt_t *stmt, zval *driver_options)
{
RETCODE rc;
pdo_odbc_db_handle *H = (pdo_odbc_db_handle *)dbh->driver_data;
pdo_odbc_stmt *S = ecalloc(1, sizeof(*S));
enum pdo_cursor_type cursor_type = PDO_CURSOR_FWDONLY;
int ret;
zend_string *nsql = NULL;
S->H = H;
S->assume_utf8 = H->assume_utf8;
/* before we prepare, we need to peek at the query; if it uses named parameters,
* we want PDO to rewrite them for us */
stmt->supports_placeholders = PDO_PLACEHOLDER_POSITIONAL;
ret = pdo_parse_params(stmt, sql, &nsql);
if (ret == 1) {
/* query was re-written */
sql = nsql;
} else if (ret == -1) {
/* couldn't grok it */
strcpy(dbh->error_code, stmt->error_code);
efree(S);
return false;
}
rc = SQLAllocHandle(SQL_HANDLE_STMT, H->dbc, &S->stmt);
if (rc == SQL_INVALID_HANDLE || rc == SQL_ERROR) {
efree(S);
if (nsql) {
zend_string_release(nsql);
}
pdo_odbc_drv_error("SQLAllocStmt");
return false;
}
stmt->driver_data = S;
cursor_type = pdo_attr_lval(driver_options, PDO_ATTR_CURSOR, PDO_CURSOR_FWDONLY);
if (cursor_type != PDO_CURSOR_FWDONLY) {
rc = SQLSetStmtAttr(S->stmt, SQL_ATTR_CURSOR_SCROLLABLE, (void*)SQL_SCROLLABLE, 0);
if (rc != SQL_SUCCESS && rc != SQL_SUCCESS_WITH_INFO) {
pdo_odbc_stmt_error("SQLSetStmtAttr: SQL_ATTR_CURSOR_SCROLLABLE");
SQLFreeHandle(SQL_HANDLE_STMT, S->stmt);
if (nsql) {
zend_string_release(nsql);
}
return false;
}
}
rc = SQLPrepare(S->stmt, (SQLCHAR *) ZSTR_VAL(sql), SQL_NTS);
if (nsql) {
zend_string_release(nsql);
}
stmt->methods = &odbc_stmt_methods;
if (rc != SQL_SUCCESS) {
pdo_odbc_stmt_error("SQLPrepare");
if (rc != SQL_SUCCESS_WITH_INFO) {
/* clone error information into the db handle */
strcpy(H->einfo.last_err_msg, S->einfo.last_err_msg);
H->einfo.file = S->einfo.file;
H->einfo.line = S->einfo.line;
H->einfo.what = S->einfo.what;
strcpy(dbh->error_code, stmt->error_code);
}
}
if (rc != SQL_SUCCESS && rc != SQL_SUCCESS_WITH_INFO) {
return false;
}
return true;
}
static zend_long odbc_handle_doer(pdo_dbh_t *dbh, const zend_string *sql)
{
pdo_odbc_db_handle *H = (pdo_odbc_db_handle *)dbh->driver_data;
RETCODE rc;
SQLLEN row_count = -1;
PDO_ODBC_HSTMT stmt;
rc = SQLAllocHandle(SQL_HANDLE_STMT, H->dbc, &stmt);
if (rc != SQL_SUCCESS && rc != SQL_SUCCESS_WITH_INFO) {
pdo_odbc_drv_error("SQLAllocHandle: STMT");
return -1;
}
rc = SQLExecDirect(stmt, (SQLCHAR *) ZSTR_VAL(sql), ZSTR_LEN(sql));
if (rc == SQL_NO_DATA) {
/* If SQLExecDirect executes a searched update or delete statement that
* does not affect any rows at the data source, the call to
* SQLExecDirect returns SQL_NO_DATA. */
row_count = 0;
goto out;
}
if (rc != SQL_SUCCESS && rc != SQL_SUCCESS_WITH_INFO) {
pdo_odbc_doer_error("SQLExecDirect");
goto out;
}
rc = SQLRowCount(stmt, &row_count);
if (rc != SQL_SUCCESS && rc != SQL_SUCCESS_WITH_INFO) {
pdo_odbc_doer_error("SQLRowCount");
goto out;
}
if (row_count == -1) {
row_count = 0;
}
out:
SQLFreeHandle(SQL_HANDLE_STMT, stmt);
return row_count;
}
/* TODO: Do ODBC quoter
static int odbc_handle_quoter(pdo_dbh_t *dbh, const char *unquoted, size_t unquotedlen, char **quoted, size_t *quotedlen, enum pdo_param_type param_type )
{
// pdo_odbc_db_handle *H = (pdo_odbc_db_handle *)dbh->driver_data;
// TODO: figure it out
return 0;
}
*/
static bool odbc_handle_begin(pdo_dbh_t *dbh)
{
if (dbh->auto_commit) {
/* we need to disable auto-commit now, to be able to initiate a transaction */
RETCODE rc;
pdo_odbc_db_handle *H = (pdo_odbc_db_handle *)dbh->driver_data;
rc = SQLSetConnectAttr(H->dbc, SQL_ATTR_AUTOCOMMIT, (SQLPOINTER)SQL_AUTOCOMMIT_OFF, SQL_IS_INTEGER);
if (rc != SQL_SUCCESS) {
pdo_odbc_drv_error("SQLSetConnectAttr AUTOCOMMIT = OFF");
return false;
}
}
return true;
}
static bool odbc_handle_commit(pdo_dbh_t *dbh)
{
pdo_odbc_db_handle *H = (pdo_odbc_db_handle *)dbh->driver_data;
RETCODE rc;
rc = SQLEndTran(SQL_HANDLE_DBC, H->dbc, SQL_COMMIT);
if (rc != SQL_SUCCESS) {
pdo_odbc_drv_error("SQLEndTran: Commit");
if (rc != SQL_SUCCESS_WITH_INFO) {
return false;
}
}
if (dbh->auto_commit) {
/* turn auto-commit back on again */
rc = SQLSetConnectAttr(H->dbc, SQL_ATTR_AUTOCOMMIT, (SQLPOINTER)SQL_AUTOCOMMIT_ON, SQL_IS_INTEGER);
if (rc != SQL_SUCCESS) {
pdo_odbc_drv_error("SQLSetConnectAttr AUTOCOMMIT = ON");
return false;
}
}
return true;
}
static bool odbc_handle_rollback(pdo_dbh_t *dbh)
{
pdo_odbc_db_handle *H = (pdo_odbc_db_handle *)dbh->driver_data;
RETCODE rc;
rc = SQLEndTran(SQL_HANDLE_DBC, H->dbc, SQL_ROLLBACK);
if (rc != SQL_SUCCESS) {
pdo_odbc_drv_error("SQLEndTran: Rollback");
if (rc != SQL_SUCCESS_WITH_INFO) {
return false;
}
}
if (dbh->auto_commit && H->dbc) {
/* turn auto-commit back on again */
rc = SQLSetConnectAttr(H->dbc, SQL_ATTR_AUTOCOMMIT, (SQLPOINTER)SQL_AUTOCOMMIT_ON, SQL_IS_INTEGER);
if (rc != SQL_SUCCESS) {
pdo_odbc_drv_error("SQLSetConnectAttr AUTOCOMMIT = ON");
return false;
}
}
return true;
}
static bool odbc_handle_set_attr(pdo_dbh_t *dbh, zend_long attr, zval *val)
{
pdo_odbc_db_handle *H = (pdo_odbc_db_handle *)dbh->driver_data;
bool bval;
switch (attr) {
case PDO_ODBC_ATTR_ASSUME_UTF8:
if (!pdo_get_bool_param(&bval, val)) {
return false;
}
H->assume_utf8 = bval;
return true;
case PDO_ATTR_AUTOCOMMIT:
if (!pdo_get_bool_param(&bval, val)) {
return false;
}
if (dbh->in_txn) {
pdo_raise_impl_error(dbh, NULL, "HY000", "Cannot change autocommit mode while a transaction is already open");
return false;
}
if (dbh->auto_commit ^ bval) {
dbh->auto_commit = bval;
RETCODE rc = SQLSetConnectAttr(
H->dbc,
SQL_ATTR_AUTOCOMMIT,
dbh->auto_commit ? (SQLPOINTER) SQL_AUTOCOMMIT_ON : (SQLPOINTER) SQL_AUTOCOMMIT_OFF,
SQL_IS_INTEGER
);
if (rc != SQL_SUCCESS) {
pdo_odbc_drv_error(
dbh->auto_commit ? "SQLSetConnectAttr AUTOCOMMIT = ON" : "SQLSetConnectAttr AUTOCOMMIT = OFF"
);
return false;
}
}
return true;
default:
strcpy(H->einfo.last_err_msg, "Unknown Attribute");
H->einfo.what = "setAttribute";
strcpy(H->einfo.last_state, "IM001");
return false;
}
}
static int pdo_odbc_get_info_string(pdo_dbh_t *dbh, SQLUSMALLINT type, zval *val)
{
RETCODE rc;
SQLSMALLINT out_len;
char buf[256];
pdo_odbc_db_handle *H = (pdo_odbc_db_handle *)dbh->driver_data;
rc = SQLGetInfo(H->dbc, type, (SQLPOINTER)buf, sizeof(buf), &out_len);
/* returning -1 is treated as an error, not as unsupported */
if (rc != SQL_SUCCESS && rc != SQL_SUCCESS_WITH_INFO) {
return -1;
}
ZVAL_STRINGL(val, buf, out_len);
return 1;
}
static int odbc_handle_get_attr(pdo_dbh_t *dbh, zend_long attr, zval *val)
{
pdo_odbc_db_handle *H = (pdo_odbc_db_handle *)dbh->driver_data;
switch (attr) {
case PDO_ATTR_CLIENT_VERSION:
ZVAL_STRING(val, "ODBC-" PDO_ODBC_TYPE);
return 1;
case PDO_ATTR_SERVER_VERSION:
return pdo_odbc_get_info_string(dbh, SQL_DBMS_VER, val);
case PDO_ATTR_SERVER_INFO:
return pdo_odbc_get_info_string(dbh, SQL_DBMS_NAME, val);
case PDO_ATTR_PREFETCH:
case PDO_ATTR_TIMEOUT:
case PDO_ATTR_CONNECTION_STATUS:
break;
case PDO_ODBC_ATTR_ASSUME_UTF8:
ZVAL_BOOL(val, H->assume_utf8);
return 1;
case PDO_ATTR_AUTOCOMMIT:
ZVAL_BOOL(val, dbh->auto_commit);
return 1;
}
return 0;
}
static zend_result odbc_handle_check_liveness(pdo_dbh_t *dbh)
{
RETCODE ret;
UCHAR d_name[32];
SQLSMALLINT len;
SQLUINTEGER dead = SQL_CD_FALSE;
pdo_odbc_db_handle *H = (pdo_odbc_db_handle *)dbh->driver_data;
ret = SQLGetConnectAttr(H->dbc, SQL_ATTR_CONNECTION_DEAD, &dead, 0, NULL);
if (ret == SQL_SUCCESS && dead == SQL_CD_TRUE) {
/* Bail early here, since we know it's gone */
return FAILURE;
}
/*
* If the driver doesn't support SQL_ATTR_CONNECTION_DEAD, or if
* it returns false (which could be a false positive), fall back
* to using SQL_DATA_SOURCE_READ_ONLY, which isn't semantically
* correct, but works with many drivers.
*/
ret = SQLGetInfo(H->dbc, SQL_DATA_SOURCE_READ_ONLY, d_name,
sizeof(d_name), &len);
if (ret != SQL_SUCCESS || len == 0) {
return FAILURE;
}
return SUCCESS;
}
static const struct pdo_dbh_methods odbc_methods = {
odbc_handle_closer,
odbc_handle_preparer,
odbc_handle_doer,
NULL, /* quoter */
odbc_handle_begin,
odbc_handle_commit,
odbc_handle_rollback,
odbc_handle_set_attr,
NULL, /* last id */
pdo_odbc_fetch_error_func,
odbc_handle_get_attr, /* get attr */
odbc_handle_check_liveness, /* check_liveness */
NULL, /* get_driver_methods */
NULL, /* request_shutdown */
NULL, /* in transaction, use PDO's internal tracking mechanism */
NULL, /* get_gc */
NULL /* scanner */
};
static int pdo_odbc_handle_factory(pdo_dbh_t *dbh, zval *driver_options) /* {{{ */
{
pdo_odbc_db_handle *H;
RETCODE rc;
int use_direct = 0;
zend_ulong cursor_lib;
H = pecalloc(1, sizeof(*H), dbh->is_persistent);
dbh->driver_data = H;
rc = SQLAllocHandle(SQL_HANDLE_ENV, SQL_NULL_HANDLE, &H->env);
if (rc != SQL_SUCCESS && rc != SQL_SUCCESS_WITH_INFO) {
pdo_odbc_drv_error("SQLAllocHandle: ENV");
goto fail;
}
rc = SQLSetEnvAttr(H->env, SQL_ATTR_ODBC_VERSION, (void*)SQL_OV_ODBC3, 0);
if (rc != SQL_SUCCESS && rc != SQL_SUCCESS_WITH_INFO) {
pdo_odbc_drv_error("SQLSetEnvAttr: ODBC3");
goto fail;
}
#ifdef SQL_ATTR_CONNECTION_POOLING
if (pdo_odbc_pool_on != SQL_CP_OFF) {
rc = SQLSetEnvAttr(H->env, SQL_ATTR_CP_MATCH, (void*)pdo_odbc_pool_mode, 0);
if (rc != SQL_SUCCESS) {
pdo_odbc_drv_error("SQLSetEnvAttr: SQL_ATTR_CP_MATCH");
goto fail;
}
}
#endif
rc = SQLAllocHandle(SQL_HANDLE_DBC, H->env, &H->dbc);
if (rc != SQL_SUCCESS && rc != SQL_SUCCESS_WITH_INFO) {
pdo_odbc_drv_error("SQLAllocHandle: DBC");
goto fail;
}
rc = SQLSetConnectAttr(H->dbc, SQL_ATTR_AUTOCOMMIT,
(SQLPOINTER)(intptr_t)(dbh->auto_commit ? SQL_AUTOCOMMIT_ON : SQL_AUTOCOMMIT_OFF), SQL_IS_INTEGER);
if (rc != SQL_SUCCESS) {
pdo_odbc_drv_error("SQLSetConnectAttr AUTOCOMMIT");
goto fail;
}
/* set up the cursor library, if needed, or if configured explicitly */
cursor_lib = pdo_attr_lval(driver_options, PDO_ODBC_ATTR_USE_CURSOR_LIBRARY, SQL_CUR_USE_IF_NEEDED);
rc = SQLSetConnectAttr(H->dbc, SQL_ODBC_CURSORS, (void*)cursor_lib, SQL_IS_INTEGER);
if (rc != SQL_SUCCESS && cursor_lib != SQL_CUR_USE_IF_NEEDED) {
pdo_odbc_drv_error("SQLSetConnectAttr SQL_ODBC_CURSORS");
goto fail;
}
/* a connection string may have = but not ; - i.e. "DSN=PHP" */
if (strchr(dbh->data_source, '=')) {
SQLCHAR dsnbuf[1024];
SQLSMALLINT dsnbuflen;
use_direct = 1;
bool use_uid_arg = dbh->username != NULL && !php_memnistr(dbh->data_source, "uid=", strlen("uid="), dbh->data_source + dbh->data_source_len);
bool use_pwd_arg = dbh->password != NULL && !php_memnistr(dbh->data_source, "pwd=", strlen("pwd="), dbh->data_source + dbh->data_source_len);
if (use_uid_arg || use_pwd_arg) {
char *db = (char*) estrndup(dbh->data_source, dbh->data_source_len);
char *db_end = db + dbh->data_source_len;
db_end--;
if ((unsigned char)*(db_end) == ';') {
*db_end = '\0';
}
char *uid = NULL, *pwd = NULL, *dsn = NULL;
bool should_quote_uid, should_quote_pwd;
size_t new_dsn_size;
if (use_uid_arg) {
should_quote_uid = !php_odbc_connstr_is_quoted(dbh->username) && php_odbc_connstr_should_quote(dbh->username);
if (should_quote_uid) {
size_t estimated_length = php_odbc_connstr_estimate_quote_length(dbh->username);
uid = emalloc(estimated_length);
php_odbc_connstr_quote(uid, dbh->username, estimated_length);
} else {
uid = dbh->username;
}
if (!use_pwd_arg) {
new_dsn_size = strlen(db) + strlen(uid) + strlen(";UID=;") + 1;
dsn = pemalloc(new_dsn_size, dbh->is_persistent);
snprintf(dsn, new_dsn_size, "%s;UID=%s;", db, uid);
}
}
if (use_pwd_arg) {
should_quote_pwd = !php_odbc_connstr_is_quoted(dbh->password) && php_odbc_connstr_should_quote(dbh->password);
if (should_quote_pwd) {
size_t estimated_length = php_odbc_connstr_estimate_quote_length(dbh->password);
pwd = emalloc(estimated_length);
php_odbc_connstr_quote(pwd, dbh->password, estimated_length);
} else {
pwd = dbh->password;
}
if (!use_uid_arg) {
new_dsn_size = strlen(db) + strlen(pwd) + strlen(";PWD=;") + 1;
dsn = pemalloc(new_dsn_size, dbh->is_persistent);
snprintf(dsn, new_dsn_size, "%s;PWD=%s;", db, pwd);
}
}
if (use_uid_arg && use_pwd_arg) {
new_dsn_size = strlen(db)
+ strlen(uid) + strlen(pwd)
+ strlen(";UID=;PWD=;") + 1;
dsn = pemalloc(new_dsn_size, dbh->is_persistent);
snprintf(dsn, new_dsn_size, "%s;UID=%s;PWD=%s;", db, uid, pwd);
}
pefree((char*)dbh->data_source, dbh->is_persistent);
dbh->data_source = dsn;
dbh->data_source_len = strlen(dsn);
if (uid && should_quote_uid) {
efree(uid);
}
if (pwd && should_quote_pwd) {
efree(pwd);
}
efree(db);
}
rc = SQLDriverConnect(H->dbc, NULL, (SQLCHAR *) dbh->data_source, dbh->data_source_len,
dsnbuf, sizeof(dsnbuf)-1, &dsnbuflen, SQL_DRIVER_NOPROMPT);
}
if (!use_direct) {
rc = SQLConnect(H->dbc, (SQLCHAR *) dbh->data_source, SQL_NTS, (SQLCHAR *) dbh->username, SQL_NTS, (SQLCHAR *) dbh->password, SQL_NTS);
}
if (rc != SQL_SUCCESS && rc != SQL_SUCCESS_WITH_INFO) {
pdo_odbc_drv_error(use_direct ? "SQLDriverConnect" : "SQLConnect");
goto fail;
}
/* TODO: if we want to play nicely, we should check to see if the driver really supports ODBC v3 or not */
dbh->methods = &odbc_methods;
dbh->alloc_own_columns = 1;
return 1;
fail:
dbh->methods = &odbc_methods;
return 0;
}
/* }}} */
const pdo_driver_t pdo_odbc_driver = {
PDO_DRIVER_HEADER(odbc),
pdo_odbc_handle_factory
};