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/* Copyright (C) 2004-2006 MySQL AB
This program 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; version 2 of the License.
This program 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
#include "protocol.h"
#include "messages.h"
#include <mysql_com.h>
#include <m_string.h>
static uchar eof_buff[1]= { (char) 254 }; /* Marker for end of fields */
static const char ERROR_PACKET_CODE= (char) 255;
int net_send_ok(struct st_net *net, unsigned long connection_id,
const char *message)
{
/*
The format of a packet
1 packet type code
1-9 affected rows count
1-9 connection id
2 thread return status
2 warning count
1-9 + message length message to send (isn't stored if no message)
*/
Buffer buff;
uchar *pos= buff.buffer;
/* check that we have space to hold mandatory fields */
buff.reserve(0, 23);
enum { OK_PACKET_CODE= 0 };
*pos++= OK_PACKET_CODE;
pos= net_store_length(pos, (ulonglong) 0);
pos= net_store_length(pos, (ulonglong) connection_id);
int2store(pos, *net->return_status);
pos+= 2;
/* We don't support warnings, so store 0 for total warning count */
int2store(pos, 0);
pos+= 2;
size_t position= pos - buff.buffer; /* we might need it for message */
if (message != NULL)
{
buff.reserve(position, 9 + strlen(message));
store_to_protocol_packet(&buff, message, &position);
}
return my_net_write(net, buff.buffer, position) || net_flush(net);
}
int net_send_error(struct st_net *net, uint sql_errno)
{
const char *err= message(sql_errno);
char buff[1 + // packet type code
2 + // sql error number
1 + SQLSTATE_LENGTH + // sql state
MYSQL_ERRMSG_SIZE]; // message
char *pos= buff;
*pos++= ERROR_PACKET_CODE;
int2store(pos, sql_errno);
pos+= 2;
/* The first # is to make the protocol backward compatible */
*pos++= '#';
memcpy(pos, errno_to_sqlstate(sql_errno), SQLSTATE_LENGTH);
pos+= SQLSTATE_LENGTH;
pos= strmake(pos, err, MYSQL_ERRMSG_SIZE - 1) + 1;
return (my_net_write(net, (uchar*) buff, (size_t) (pos - buff)) ||
net_flush(net));
}
int net_send_error_323(struct st_net *net, uint sql_errno)
{
const char *err= message(sql_errno);
char buff[1 + // packet type code
2 + // sql error number
MYSQL_ERRMSG_SIZE]; // message
char *pos= buff;
*pos++= ERROR_PACKET_CODE;
int2store(pos, sql_errno);
pos+= 2;
pos= strmake(pos, err, MYSQL_ERRMSG_SIZE - 1) + 1;
return (my_net_write(net, (uchar*) buff, (size_t) (pos - buff)) ||
net_flush(net));
}
char *net_store_length(char *pkg, uint length)
{
uchar *packet=(uchar*) pkg;
if (length < 251)
{
*packet=(uchar) length;
return (char*) packet+1;
}
*packet++=252;
int2store(packet,(uint) length);
return (char*) packet+2;
}
int store_to_protocol_packet(Buffer *buf, const char *string, size_t *position,
size_t string_len)
{
uint currpos;
/* reserve max amount of bytes needed to store length */
if (buf->reserve(*position, 9))
goto err;
currpos= (net_store_length(buf->buffer + *position,
(ulonglong) string_len) - buf->buffer);
if (buf->append(currpos, string, string_len))
goto err;
*position= *position + string_len + (currpos - *position);
return 0;
err:
return 1;
}
int store_to_protocol_packet(Buffer *buf, const char *string,
size_t *position)
{
size_t string_len;
string_len= strlen(string);
return store_to_protocol_packet(buf, string, position, string_len);
}
int send_eof(struct st_net *net)
{
uchar buff[1 + /* eof packet code */
2 + /* warning count */
2]; /* server status */
buff[0]=254;
int2store(buff+1, 0);
int2store(buff+3, 0);
return my_net_write(net, buff, sizeof(buff));
}
int send_fields(struct st_net *net, LIST *fields)
{
LIST *tmp= fields;
Buffer send_buff;
uchar small_buff[4];
size_t position= 0;
LEX_STRING *field;
/* send the number of fileds */
net_store_length(small_buff, (uint) list_length(fields));
if (my_net_write(net, small_buff, (uint) 1))
goto err;
while (tmp)
{
position= 0;
field= (LEX_STRING *) tmp->data;
store_to_protocol_packet(&send_buff,
(char*) "", &position); /* catalog name */
store_to_protocol_packet(&send_buff,
(char*) "", &position); /* db name */
store_to_protocol_packet(&send_buff,
(char*) "", &position); /* table name */
store_to_protocol_packet(&send_buff,
(char*) "", &position); /* table name alias */
store_to_protocol_packet(&send_buff,
field->str, &position); /* column name */
store_to_protocol_packet(&send_buff,
field->str, &position); /* column name alias */
send_buff.reserve(position, 12);
if (send_buff.is_error())
goto err;
send_buff.buffer[position++]= 12;
int2store(send_buff.buffer + position, 1); /* charsetnr */
int4store(send_buff.buffer + position + 2,
field->length); /* field length */
send_buff.buffer[position+6]= (char) MYSQL_TYPE_STRING; /* type */
int2store(send_buff.buffer + position + 7, 0); /* flags */
send_buff.buffer[position + 9]= (char) 0; /* decimals */
send_buff.buffer[position + 10]= 0;
send_buff.buffer[position + 11]= 0;
position+= 12;
if (my_net_write(net, send_buff.buffer, (uint) position+1))
goto err;
tmp= list_rest(tmp);
}
if (my_net_write(net, eof_buff, 1))
goto err;
return 0;
err:
return 1;
}
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