126 lines
4.9 KiB
C
126 lines
4.9 KiB
C
#pragma once
|
|
/*
|
|
* Copyright (c) 2016 MariaDB Corporation Ab
|
|
*
|
|
* Use of this software is governed by the Business Source License included
|
|
* in the LICENSE.TXT file and at www.mariadb.com/bsl11.
|
|
*
|
|
* Change Date: 2020-01-01
|
|
*
|
|
* On the date above, in accordance with the Business Source License, use
|
|
* of this software will be governed by version 2 or later of the General
|
|
* Public License.
|
|
*/
|
|
|
|
/**
|
|
* @file modutil.h A set of useful routines for module writers
|
|
*/
|
|
|
|
#include <maxscale/cdefs.h>
|
|
#include <maxscale/buffer.h>
|
|
#include <maxscale/dcb.h>
|
|
#include <string.h>
|
|
#include <maxscale/pcre2.h>
|
|
|
|
MXS_BEGIN_DECLS
|
|
|
|
#define PTR_IS_RESULTSET(b) (b[0] == 0x01 && b[1] == 0x0 && b[2] == 0x0 && b[3] == 0x01)
|
|
#define PTR_IS_EOF(b) (b[0] == 0x05 && b[1] == 0x0 && b[2] == 0x0 && b[4] == 0xfe)
|
|
#define PTR_IS_OK(b) (b[4] == 0x00)
|
|
#define PTR_IS_ERR(b) (b[4] == 0xff)
|
|
#define PTR_IS_LOCAL_INFILE(b) (b[4] == 0xfb)
|
|
#define IS_FULL_RESPONSE(buf) (modutil_count_signal_packets(buf,0,0) == 2)
|
|
|
|
extern int modutil_is_SQL(GWBUF *);
|
|
extern int modutil_is_SQL_prepare(GWBUF *);
|
|
extern int modutil_extract_SQL(GWBUF *, char **, int *);
|
|
extern int modutil_MySQL_Query(GWBUF *, char **, int *, int *);
|
|
extern char* modutil_get_SQL(GWBUF *);
|
|
extern GWBUF* modutil_replace_SQL(GWBUF *, char *);
|
|
extern char* modutil_get_query(GWBUF* buf);
|
|
extern int modutil_send_mysql_err_packet(DCB *, int, int, int, const char *, const char *);
|
|
GWBUF* modutil_get_next_MySQL_packet(GWBUF** p_readbuf);
|
|
GWBUF* modutil_get_complete_packets(GWBUF** p_readbuf);
|
|
int modutil_MySQL_query_len(GWBUF* buf, int* nbytes_missing);
|
|
void modutil_reply_parse_error(DCB* backend_dcb, char* errstr, uint32_t flags);
|
|
void modutil_reply_auth_error(DCB* backend_dcb, char* errstr, uint32_t flags);
|
|
int modutil_count_statements(GWBUF* buffer);
|
|
GWBUF* modutil_create_query(const char* query);
|
|
GWBUF* modutil_create_mysql_err_msg(int packet_number,
|
|
int affected_rows,
|
|
int merrno,
|
|
const char *statemsg,
|
|
const char *msg);
|
|
|
|
/** Struct used for tracking the state inside the modutil functions */
|
|
typedef struct
|
|
{
|
|
uint8_t state;
|
|
} modutil_state;
|
|
|
|
/** Static initialization define for modutil_state */
|
|
#define MODUTIL_STATE_INIT {0}
|
|
|
|
/**
|
|
* @brief Count the number of EOF and ERR packets in the buffer.
|
|
*
|
|
* Only complete packets are inspected and the buffer is assumed to only contain
|
|
* whole packets. If partial packets are in the buffer, they are ignored.
|
|
* The caller must handle the detection of partial packets in buffers.
|
|
*
|
|
* Before the first invocation, the value pointed by the @c state parameter
|
|
* should be initialized with MODUTIL_STATE_INIT. All subsequent calls with a
|
|
* partially processed result set must be made with only unprocessed packets
|
|
* in @c reply.
|
|
*
|
|
* @param reply Buffer to use
|
|
* @param n_found Number of previous found packets
|
|
* @param more Set to true if more results exist
|
|
* @param state Internal state of the function, NULL if the function is
|
|
* only called once per result set
|
|
*
|
|
* @return Total number of EOF and ERR packets including the ones already found
|
|
*/
|
|
int modutil_count_signal_packets(GWBUF *reply, int n_found, bool* more, modutil_state* state);
|
|
|
|
mxs_pcre2_result_t modutil_mysql_wildcard_match(const char* pattern, const char* string);
|
|
|
|
/**
|
|
* Given a buffer containing a MySQL statement, this function will return
|
|
* a pointer to the first character that is not whitespace. In this context,
|
|
* comments are also counted as whitespace. For instance:
|
|
*
|
|
* "SELECT" => "SELECT"
|
|
* " SELECT => "SELECT"
|
|
* " / * A comment * / SELECT" => "SELECT"
|
|
* "-- comment\nSELECT" => "SELECT"
|
|
*
|
|
* @param sql Pointer to buffer containing a MySQL statement
|
|
* @param len Length of sql.
|
|
*
|
|
* @return The first non whitespace (including comments) character. If the
|
|
* entire buffer is only whitespace, the returned pointer will point
|
|
* to the character following the buffer (i.e. sql + len).
|
|
*/
|
|
char* modutil_MySQL_bypass_whitespace(char* sql, size_t len);
|
|
|
|
/**
|
|
* @brief Write a COM_PING to a DCB and ignore the response
|
|
*
|
|
* @param dcb The backend DCB where the COM_PING is written
|
|
* @return True if command was successfully sent
|
|
*/
|
|
bool modutil_ignorable_ping(DCB *dcb);
|
|
|
|
/** Character and token searching functions */
|
|
char* strnchr_esc(char* ptr, char c, int len);
|
|
char* strnchr_esc_mysql(char* ptr, char c, int len);
|
|
bool is_mysql_statement_end(const char* start, int len);
|
|
bool is_mysql_sp_end(const char* start, int len);
|
|
char* modutil_get_canonical(GWBUF* querybuf);
|
|
|
|
// TODO: Move modutil out of the core
|
|
const char* STRPACKETTYPE(int p);
|
|
|
|
MXS_END_DECLS
|