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This commit is contained in:
Massimiliano Pinto
74
dcb.h
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74
dcb.h
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#ifndef _DCB_H
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#define _DCB_H
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/*
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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
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*/
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struct session;
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/*
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* The function pointer table used by descriptors to call relevant functions
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* within the protocol specific code.
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*/
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struct dcb;
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typedef struct gw_protocol {
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/*
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* The operations that can be performed on the descriptor
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*/
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int (*read)(struct dcb *, int);
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int (*write)(struct dcb *, int);
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int (*error)(struct dcb *, int);
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int (*accept)(struct dcb *, int);
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//int (*close)(struct dcb *);
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} GWPROTOCOL;
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/*
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* Descriptor Control Block
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*/
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typedef struct dcb {
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int fd; /* The descriptor */
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int state; /* Current descriptor state */
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void *protocol; /* The protocol specific state */
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struct session *session; /* The owning session */
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GWPROTOCOL func; /* The functions for this descrioptor */
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/* queue buffer for write
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is now a two buffer implementation
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Only used in client write
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*/
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uint8_t buffer[MAX_BUFFER_SIZE]; /* network buffer */
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int buff_bytes; /* bytes in buffer */
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uint8_t *buffer_ptr; /* buffer pointer */
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uint8_t second_buffer[MAX_BUFFER_SIZE]; /* 2nd network buffer */
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int second_buff_bytes; /* 2nd bytes in buffer */
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uint8_t *second_buffer_ptr; /* 2nd buffer pointer */
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} DCB;
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/* DCB states */
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#define DCB_STATE_ALLOC 0 /* Memory allocated but not populated */
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#define DCB_STATE_IDLE 1 /* Not yet in the poll mask */
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#define DCB_STATE_POLLING 2 /* Waiting in the poll loop */
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#define DCB_STATE_PROCESSING 4 /* Processing an event */
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#define DCB_STATE_LISTENING 5 /* The DCB is for a listening socket */
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/* A few useful macros */
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#define DCB_SESSION(x) (x)->session
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#define DCB_PROTOCOL(x, type) (type *)((x)->protocol)
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#endif
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49
mysql_protocol.h
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49
mysql_protocol.h
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#ifndef _MYSQL_PROTOCOL_H
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#define _MYSQL_PROTOCOL_H
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/*
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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
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*/
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#ifndef MYSQL_SCRAMBLE_LEN
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#define MYSQL_SCRAMBLE_LEN GW_MYSQL_SCRAMBLE_SIZE
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#endif
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struct dcb;
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/*
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* MySQL Protocol specific state data
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*/
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typedef struct {
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int fd;
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struct dcb *descriptor; /* The DCB of the socket we are running on */
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int state; /* Current descriptor state */
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char scramble[MYSQL_SCRAMBLE_LEN];
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uint32_t server_capabilities; /* server capabilities */
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uint32_t client_capabilities; /* client capabilities */
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unsigned long tid; /* MySQL Thread ID */
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} MySQLProtocol;
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/* MySQL Protocol States */
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#define MYSQL_ALLOC 0 /* Allocate data */
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#define MYSQL_AUTH_SENT 1 /* Authentication handshake has been sent */
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#define MYSQL_AUTH_RECV 2 /* Received user, password, db and capabilities */
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#define MYSQL_AUTH_FAILED 3 /* Auth failed, return error packet */
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#define MYSQL_IDLE 4 /* Auth done. Protocol is idle, waiting for statements */
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#define MYSQL_ROUTING 5
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#define MYSQL_WAITING_RESULT 6
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#endif
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