e767c70acb
the newSession calls connect_dcb and then the connect() in mysql_backend.c The selected backend is always the last one ath the moment. For the transparent Authentication dcb->data is used to store MySQL session data before starting the session. This could be revisited. Please note the COM_QUIT in mysql_client.c has the close functionalities but they are now disabled for testing/debug
99 lines
2.6 KiB
C
99 lines
2.6 KiB
C
/*
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* This file is distributed as part of the SkySQL Gateway. It is free
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* software: you can redistribute it and/or modify it under the terms of the
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* GNU General Public License as published by the Free Software Foundation,
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* version 2.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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* details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; if not, write to the Free Software Foundation, Inc., 51
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* Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Copyright SkySQL Ab 2013
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*/
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/*
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* MySQL Protocol common routines for client to gateway and gateway to backend
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*
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* Revision History
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* Date Who Description
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* 17/06/2013 Massimiliano Pinto Common MySQL protocol routines
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*/
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#include "mysql_client_server_protocol.h"
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static char *version_str = "V1.0.0";
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MySQLProtocol *gw_mysql_init(MySQLProtocol *data);
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void gw_mysql_close(MySQLProtocol **ptr);
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extern gw_read_backend_event(DCB* dcb);
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extern gw_write_backend_event(DCB *dcb);
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extern int gw_MySQLWrite_backend(DCB *dcb, GWBUF *queue);
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extern int gw_error_backend_event(DCB *dcb);
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///////////////////////////////
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// Initialize mysql protocol struct
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///////////////////////////////////////
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MySQLProtocol *gw_mysql_init(MySQLProtocol *data) {
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int rv = -1;
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MySQLProtocol *input = NULL;
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if (input == NULL) {
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// structure allocation
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input = calloc(1, sizeof(MySQLProtocol));
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if (input == NULL)
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return NULL;
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}
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#ifdef MYSQL_CONN_DEBUG
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fprintf(stderr, "gw_mysql_init() called\n");
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#endif
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return input;
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}
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//////////////////////////////////////
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// close a connection if opened
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// free data scructure for MySQLProtocol
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//////////////////////////////////////
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void gw_mysql_close(MySQLProtocol **ptr) {
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MySQLProtocol *conn = *ptr;
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if (*ptr == NULL)
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return;
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#ifdef MYSQL_CONN_DEBUG
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fprintf(stderr, "Closing MySQL connection %i, [%s]\n", conn->fd, conn->scramble);
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#endif
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if (conn->fd > 0) {
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//COM_QUIT will not be sent here, but from the caller of this routine!
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#ifdef MYSQL_CONN_DEBUG
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fprintf(stderr, "mysqlgw_mysql_close() called for %i\n", conn->fd);
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#endif
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close(conn->fd);
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} else {
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#ifdef MYSQL_CONN_DEBUG
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fprintf(stderr, "mysqlgw_mysql_close() called, no socket %i\n", conn->fd);
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#endif
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}
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free(*ptr);
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*ptr = NULL;
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#ifdef MYSQL_CONN_DEBUG
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fprintf(stderr, "mysqlgw_mysql_close() free(conn) done\n");
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#endif
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}
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