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client.c
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4881 lines (4301 loc) · 145 KB
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/* Copyright (c) 2003, 2015, Oracle and/or its affiliates. All rights reserved.
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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
/*
This file is included by both libmysql.c (the MySQL client C API)
and the mysqld server to connect to another MYSQL server.
The differences for the two cases are:
- Things that only works for the client:
- Trying to automaticly determinate user name if not supplied to
mysql_real_connect()
- Support for reading local file with LOAD DATA LOCAL
- SHARED memory handling
- Prepared statements
- Things that only works for the server
In all other cases, the code should be idential for the client and
server.
*/
#include <my_global.h>
#include "mysql.h"
#include "hash.h"
#include "mysql/client_authentication.h"
/* Remove client convenience wrappers */
#undef max_allowed_packet
#undef net_buffer_length
#ifdef EMBEDDED_LIBRARY
#undef MYSQL_SERVER
#ifndef MYSQL_CLIENT
#define MYSQL_CLIENT
#endif
#define CLI_MYSQL_REAL_CONNECT STDCALL cli_mysql_real_connect
#undef net_flush
my_bool net_flush(NET *net);
#else /*EMBEDDED_LIBRARY*/
#define CLI_MYSQL_REAL_CONNECT STDCALL mysql_real_connect
#endif /*EMBEDDED_LIBRARY*/
#include <my_sys.h>
#include "my_default.h"
#include <mysys_err.h>
#include <m_string.h>
#include <m_ctype.h>
#include "mysql_version.h"
#include "mysqld_error.h"
#include "errmsg.h"
#include <violite.h>
#if !defined(__WIN__)
#include <my_pthread.h> /* because of signal() */
#endif /* !defined(__WIN__) */
#include <sys/stat.h>
#include <signal.h>
#include <time.h>
#ifdef HAVE_PWD_H
#include <pwd.h>
#endif
#if !defined(__WIN__)
#ifdef HAVE_SELECT_H
# include <select.h>
#endif
#ifdef HAVE_SYS_SELECT_H
# include <sys/select.h>
#endif
#endif /* !defined(__WIN__) */
#ifdef HAVE_SYS_UN_H
# include <sys/un.h>
#endif
#ifndef _WIN32
#include <errno.h>
#define SOCKET_ERROR -1
#endif
#include "client_settings.h"
#include <sql_common.h>
#include <mysql/client_plugin.h>
#define native_password_plugin_name "mysql_native_password"
#define old_password_plugin_name "mysql_old_password"
uint mysql_port=0;
char *mysql_unix_port= 0;
const char *unknown_sqlstate= "HY000";
const char *not_error_sqlstate= "00000";
const char *cant_connect_sqlstate= "08001";
#ifdef HAVE_SMEM
char *shared_memory_base_name= 0;
const char *def_shared_memory_base_name= default_shared_memory_base_name;
#endif
static void mysql_close_free_options(MYSQL *mysql);
static void mysql_close_free(MYSQL *mysql);
static void mysql_prune_stmt_list(MYSQL *mysql);
CHARSET_INFO *default_client_charset_info = &my_charset_latin1;
/* Server error code and message */
unsigned int mysql_server_last_errno;
char mysql_server_last_error[MYSQL_ERRMSG_SIZE];
/**
Convert the connect timeout option to a timeout value for VIO
functions (vio_socket_connect() and vio_io_wait()).
@param mysql Connection handle (client side).
@return The timeout value in milliseconds, or -1 if no timeout.
*/
static int get_vio_connect_timeout(MYSQL *mysql)
{
int timeout_ms;
uint timeout_sec;
/*
A timeout of 0 means no timeout. Also, the connect_timeout
option value is in seconds, while VIO timeouts are measured
in milliseconds. Hence, check for a possible overflow. In
case of overflow, set to no timeout.
*/
timeout_sec= mysql->options.connect_timeout;
if (!timeout_sec || (timeout_sec > INT_MAX/1000))
timeout_ms= -1;
else
timeout_ms= (int) (timeout_sec * 1000);
return timeout_ms;
}
#ifdef _WIN32
/**
Convert the connect timeout option to a timeout value for WIN32
synchronization functions.
@remark Specific for WIN32 connection methods shared memory and
named pipe.
@param mysql Connection handle (client side).
@return The timeout value in milliseconds, or INFINITE if no timeout.
*/
static DWORD get_win32_connect_timeout(MYSQL *mysql)
{
DWORD timeout_ms;
uint timeout_sec;
/*
A timeout of 0 means no timeout. Also, the connect_timeout
option value is in seconds, while WIN32 timeouts are in
milliseconds. Hence, check for a possible overflow. In case
of overflow, set to no timeout.
*/
timeout_sec= mysql->options.connect_timeout;
if (!timeout_sec || (timeout_sec > INT_MAX/1000))
timeout_ms= INFINITE;
else
timeout_ms= (DWORD) (timeout_sec * 1000);
return timeout_ms;
}
#endif
/**
Set the internal error message to mysql handler
@param mysql connection handle (client side)
@param errcode CR_ error code, passed to ER macro to get
error text
@parma sqlstate SQL standard sqlstate
*/
void set_mysql_error(MYSQL *mysql, int errcode, const char *sqlstate)
{
NET *net;
DBUG_ENTER("set_mysql_error");
DBUG_PRINT("enter", ("error :%d '%s'", errcode, ER(errcode)));
DBUG_ASSERT(mysql != 0);
if (mysql)
{
net= &mysql->net;
net->last_errno= errcode;
strmov(net->last_error, ER(errcode));
strmov(net->sqlstate, sqlstate);
}
else
{
mysql_server_last_errno= errcode;
strmov(mysql_server_last_error, ER(errcode));
}
DBUG_VOID_RETURN;
}
/**
Is this NET instance initialized?
@c my_net_init() and net_end()
*/
my_bool my_net_is_inited(NET *net)
{
return net->buff != NULL;
}
/**
Clear possible error state of struct NET
@param net clear the state of the argument
*/
void net_clear_error(NET *net)
{
net->last_errno= 0;
net->last_error[0]= '\0';
strmov(net->sqlstate, not_error_sqlstate);
}
/**
Set an error message on the client.
@param mysql connection handle
@param errcode CR_* errcode, for client errors
@param sqlstate SQL standard sql state, unknown_sqlstate for the
majority of client errors.
@param format error message template, in sprintf format
@param ... variable number of arguments
*/
void set_mysql_extended_error(MYSQL *mysql, int errcode,
const char *sqlstate,
const char *format, ...)
{
NET *net;
va_list args;
DBUG_ENTER("set_mysql_extended_error");
DBUG_PRINT("enter", ("error :%d '%s'", errcode, format));
DBUG_ASSERT(mysql != 0);
net= &mysql->net;
net->last_errno= errcode;
va_start(args, format);
my_vsnprintf(net->last_error, sizeof(net->last_error)-1,
format, args);
va_end(args);
strmov(net->sqlstate, sqlstate);
DBUG_VOID_RETURN;
}
/*
Create a named pipe connection
*/
#ifdef _WIN32
static HANDLE create_named_pipe(MYSQL *mysql, DWORD connect_timeout,
const char **arg_host,
const char **arg_unix_socket)
{
HANDLE hPipe=INVALID_HANDLE_VALUE;
char pipe_name[1024];
DWORD dwMode;
int i;
my_bool testing_named_pipes=0;
const char *host= *arg_host, *unix_socket= *arg_unix_socket;
if ( ! unix_socket || (unix_socket)[0] == 0x00)
unix_socket = mysql_unix_port;
if (!host || !strcmp(host,LOCAL_HOST))
host=LOCAL_HOST_NAMEDPIPE;
pipe_name[sizeof(pipe_name)-1]= 0; /* Safety if too long string */
strxnmov(pipe_name, sizeof(pipe_name)-1, "\\\\", host, "\\pipe\\",
unix_socket, NullS);
DBUG_PRINT("info",("Server name: '%s'. Named Pipe: %s", host, unix_socket));
for (i=0 ; i < 100 ; i++) /* Don't retry forever */
{
if ((hPipe = CreateFile(pipe_name,
GENERIC_READ | GENERIC_WRITE,
0,
NULL,
OPEN_EXISTING,
FILE_FLAG_OVERLAPPED,
NULL )) != INVALID_HANDLE_VALUE)
break;
if (GetLastError() != ERROR_PIPE_BUSY)
{
set_mysql_extended_error(mysql, CR_NAMEDPIPEOPEN_ERROR,
unknown_sqlstate, ER(CR_NAMEDPIPEOPEN_ERROR),
host, unix_socket, (ulong) GetLastError());
return INVALID_HANDLE_VALUE;
}
/* wait for for an other instance */
if (!WaitNamedPipe(pipe_name, connect_timeout))
{
set_mysql_extended_error(mysql, CR_NAMEDPIPEWAIT_ERROR, unknown_sqlstate,
ER(CR_NAMEDPIPEWAIT_ERROR),
host, unix_socket, (ulong) GetLastError());
return INVALID_HANDLE_VALUE;
}
}
if (hPipe == INVALID_HANDLE_VALUE)
{
set_mysql_extended_error(mysql, CR_NAMEDPIPEOPEN_ERROR, unknown_sqlstate,
ER(CR_NAMEDPIPEOPEN_ERROR), host, unix_socket,
(ulong) GetLastError());
return INVALID_HANDLE_VALUE;
}
dwMode = PIPE_READMODE_BYTE | PIPE_WAIT;
if ( !SetNamedPipeHandleState(hPipe, &dwMode, NULL, NULL) )
{
CloseHandle( hPipe );
set_mysql_extended_error(mysql, CR_NAMEDPIPESETSTATE_ERROR,
unknown_sqlstate, ER(CR_NAMEDPIPESETSTATE_ERROR),
host, unix_socket, (ulong) GetLastError());
return INVALID_HANDLE_VALUE;
}
*arg_host=host ; *arg_unix_socket=unix_socket; /* connect arg */
return (hPipe);
}
#endif
/*
Create new shared memory connection, return handler of connection
@param mysql Pointer of mysql structure
@param net Pointer of net structure
@param connect_timeout Timeout of connection (in milliseconds)
@return HANDLE to the shared memory area.
*/
#ifdef HAVE_SMEM
static HANDLE create_shared_memory(MYSQL *mysql, NET *net,
DWORD connect_timeout)
{
ulong smem_buffer_length = shared_memory_buffer_length + 4;
/*
event_connect_request is event object for start connection actions
event_connect_answer is event object for confirm, that server put data
handle_connect_file_map is file-mapping object, use for create shared
memory
handle_connect_map is pointer on shared memory
handle_map is pointer on shared memory for client
event_server_wrote,
event_server_read,
event_client_wrote,
event_client_read are events for transfer data between server and client
handle_file_map is file-mapping object, use for create shared memory
*/
HANDLE event_connect_request = NULL;
HANDLE event_connect_answer = NULL;
HANDLE handle_connect_file_map = NULL;
char *handle_connect_map = NULL;
char *handle_map = NULL;
HANDLE event_server_wrote = NULL;
HANDLE event_server_read = NULL;
HANDLE event_client_wrote = NULL;
HANDLE event_client_read = NULL;
HANDLE event_conn_closed = NULL;
HANDLE handle_file_map = NULL;
ulong connect_number;
char connect_number_char[22], *p;
char *tmp= NULL;
char *suffix_pos;
DWORD error_allow = 0;
DWORD error_code = 0;
DWORD event_access_rights= SYNCHRONIZE | EVENT_MODIFY_STATE;
char *shared_memory_base_name = mysql->options.shared_memory_base_name;
static const char *name_prefixes[] = {"","Global\\"};
const char *prefix;
int i;
/*
If this is NULL, somebody freed the MYSQL* options. mysql_close()
is a good candidate. We don't just silently (re)set it to
def_shared_memory_base_name as that would create really confusing/buggy
behavior if the user passed in a different name on the command-line or
in a my.cnf.
*/
DBUG_ASSERT(shared_memory_base_name != NULL);
/*
get enough space base-name + '_' + longest suffix we might ever send
*/
if (!(tmp= (char *)my_malloc(strlen(shared_memory_base_name) + 32L, MYF(MY_FAE))))
goto err;
/*
The name of event and file-mapping events create agree next rule:
shared_memory_base_name+unique_part
Where:
shared_memory_base_name is unique value for each server
unique_part is uniquel value for each object (events and file-mapping)
*/
for (i = 0; i< array_elements(name_prefixes); i++)
{
prefix= name_prefixes[i];
suffix_pos = strxmov(tmp, prefix , shared_memory_base_name, "_", NullS);
strmov(suffix_pos, "CONNECT_REQUEST");
event_connect_request= OpenEvent(event_access_rights, FALSE, tmp);
if (event_connect_request)
{
break;
}
}
if (!event_connect_request)
{
error_allow = CR_SHARED_MEMORY_CONNECT_REQUEST_ERROR;
goto err;
}
strmov(suffix_pos, "CONNECT_ANSWER");
if (!(event_connect_answer= OpenEvent(event_access_rights,FALSE,tmp)))
{
error_allow = CR_SHARED_MEMORY_CONNECT_ANSWER_ERROR;
goto err;
}
strmov(suffix_pos, "CONNECT_DATA");
if (!(handle_connect_file_map= OpenFileMapping(FILE_MAP_WRITE,FALSE,tmp)))
{
error_allow = CR_SHARED_MEMORY_CONNECT_FILE_MAP_ERROR;
goto err;
}
if (!(handle_connect_map= MapViewOfFile(handle_connect_file_map,
FILE_MAP_WRITE,0,0,sizeof(DWORD))))
{
error_allow = CR_SHARED_MEMORY_CONNECT_MAP_ERROR;
goto err;
}
/* Send to server request of connection */
if (!SetEvent(event_connect_request))
{
error_allow = CR_SHARED_MEMORY_CONNECT_SET_ERROR;
goto err;
}
/* Wait of answer from server */
if (WaitForSingleObject(event_connect_answer, connect_timeout) !=
WAIT_OBJECT_0)
{
error_allow = CR_SHARED_MEMORY_CONNECT_ABANDONED_ERROR;
goto err;
}
/* Get number of connection */
connect_number = uint4korr(handle_connect_map);/*WAX2*/
p= int10_to_str(connect_number, connect_number_char, 10);
/*
The name of event and file-mapping events create agree next rule:
shared_memory_base_name+unique_part+number_of_connection
Where:
shared_memory_base_name is uniquel value for each server
unique_part is uniquel value for each object (events and file-mapping)
number_of_connection is number of connection between server and client
*/
suffix_pos = strxmov(tmp, prefix , shared_memory_base_name, "_", connect_number_char,
"_", NullS);
strmov(suffix_pos, "DATA");
if ((handle_file_map = OpenFileMapping(FILE_MAP_WRITE,FALSE,tmp)) == NULL)
{
error_allow = CR_SHARED_MEMORY_FILE_MAP_ERROR;
goto err2;
}
if ((handle_map = MapViewOfFile(handle_file_map,FILE_MAP_WRITE,0,0,
smem_buffer_length)) == NULL)
{
error_allow = CR_SHARED_MEMORY_MAP_ERROR;
goto err2;
}
strmov(suffix_pos, "SERVER_WROTE");
if ((event_server_wrote = OpenEvent(event_access_rights,FALSE,tmp)) == NULL)
{
error_allow = CR_SHARED_MEMORY_EVENT_ERROR;
goto err2;
}
strmov(suffix_pos, "SERVER_READ");
if ((event_server_read = OpenEvent(event_access_rights,FALSE,tmp)) == NULL)
{
error_allow = CR_SHARED_MEMORY_EVENT_ERROR;
goto err2;
}
strmov(suffix_pos, "CLIENT_WROTE");
if ((event_client_wrote = OpenEvent(event_access_rights,FALSE,tmp)) == NULL)
{
error_allow = CR_SHARED_MEMORY_EVENT_ERROR;
goto err2;
}
strmov(suffix_pos, "CLIENT_READ");
if ((event_client_read = OpenEvent(event_access_rights,FALSE,tmp)) == NULL)
{
error_allow = CR_SHARED_MEMORY_EVENT_ERROR;
goto err2;
}
strmov(suffix_pos, "CONNECTION_CLOSED");
if ((event_conn_closed = OpenEvent(event_access_rights,FALSE,tmp)) == NULL)
{
error_allow = CR_SHARED_MEMORY_EVENT_ERROR;
goto err2;
}
/*
Set event that server should send data
*/
SetEvent(event_server_read);
err2:
if (error_allow == 0)
{
net->vio= vio_new_win32shared_memory(handle_file_map,handle_map,
event_server_wrote,
event_server_read,event_client_wrote,
event_client_read,event_conn_closed);
}
else
{
error_code = GetLastError();
if (event_server_read)
CloseHandle(event_server_read);
if (event_server_wrote)
CloseHandle(event_server_wrote);
if (event_client_read)
CloseHandle(event_client_read);
if (event_client_wrote)
CloseHandle(event_client_wrote);
if (event_conn_closed)
CloseHandle(event_conn_closed);
if (handle_map)
UnmapViewOfFile(handle_map);
if (handle_file_map)
CloseHandle(handle_file_map);
}
err:
my_free(tmp);
if (error_allow)
error_code = GetLastError();
if (event_connect_request)
CloseHandle(event_connect_request);
if (event_connect_answer)
CloseHandle(event_connect_answer);
if (handle_connect_map)
UnmapViewOfFile(handle_connect_map);
if (handle_connect_file_map)
CloseHandle(handle_connect_file_map);
if (error_allow)
{
if (error_allow == CR_SHARED_MEMORY_EVENT_ERROR)
set_mysql_extended_error(mysql, error_allow, unknown_sqlstate,
ER(error_allow), suffix_pos, error_code);
else
set_mysql_extended_error(mysql, error_allow, unknown_sqlstate,
ER(error_allow), error_code);
return(INVALID_HANDLE_VALUE);
}
return(handle_map);
}
#endif
/**
Read a packet from server. Give error message if socket was down
or packet is an error message
@retval packet_error An error occurred during reading.
Error message is set.
@retval
*/
ulong
cli_safe_read(MYSQL *mysql)
{
NET *net= &mysql->net;
ulong len=0;
if (net->vio != 0)
len=my_net_read(net);
if (len == packet_error || len == 0)
{
DBUG_PRINT("error",("Wrong connection or packet. fd: %s len: %lu",
vio_description(net->vio),len));
#ifdef MYSQL_SERVER
if (net->vio && (net->last_errno == ER_NET_READ_INTERRUPTED))
return (packet_error);
#endif /*MYSQL_SERVER*/
end_server(mysql);
set_mysql_error(mysql, net->last_errno == ER_NET_PACKET_TOO_LARGE ?
CR_NET_PACKET_TOO_LARGE: CR_SERVER_LOST, unknown_sqlstate);
return (packet_error);
}
if (net->read_pos[0] == 255)
{
if (len > 3)
{
char *pos=(char*) net->read_pos+1;
net->last_errno=uint2korr(pos);
pos+=2;
len-=2;
if (protocol_41(mysql) && pos[0] == '#')
{
strmake(net->sqlstate, pos+1, SQLSTATE_LENGTH);
pos+= SQLSTATE_LENGTH+1;
}
else
{
/*
The SQL state hasn't been received -- it should be reset to HY000
(unknown error sql state).
*/
strmov(net->sqlstate, unknown_sqlstate);
}
(void) strmake(net->last_error,(char*) pos,
MY_MIN((uint) len,(uint) sizeof(net->last_error)-1));
}
else
set_mysql_error(mysql, CR_UNKNOWN_ERROR, unknown_sqlstate);
/*
Cover a protocol design error: error packet does not
contain the server status. Therefore, the client has no way
to find out whether there are more result sets of
a multiple-result-set statement pending. Luckily, in 5.0 an
error always aborts execution of a statement, wherever it is
a multi-statement or a stored procedure, so it should be
safe to unconditionally turn off the flag here.
*/
mysql->server_status&= ~SERVER_MORE_RESULTS_EXISTS;
DBUG_PRINT("error",("Got error: %d/%s (%s)",
net->last_errno,
net->sqlstate,
net->last_error));
return(packet_error);
}
return len;
}
void free_rows(MYSQL_DATA *cur)
{
if (cur)
{
free_root(&cur->alloc,MYF(0));
my_free(cur);
}
}
my_bool
cli_advanced_command(MYSQL *mysql, enum enum_server_command command,
const uchar *header, ulong header_length,
const uchar *arg, ulong arg_length, my_bool skip_check,
MYSQL_STMT *stmt)
{
NET *net= &mysql->net;
my_bool result= 1;
my_bool stmt_skip= stmt ? stmt->state != MYSQL_STMT_INIT_DONE : FALSE;
DBUG_ENTER("cli_advanced_command");
if (mysql->net.vio == 0)
{ /* Do reconnect if possible */
if (mysql_reconnect(mysql) || stmt_skip)
DBUG_RETURN(1);
}
if (mysql->status != MYSQL_STATUS_READY ||
mysql->server_status & SERVER_MORE_RESULTS_EXISTS)
{
DBUG_PRINT("error",("state: %d", mysql->status));
set_mysql_error(mysql, CR_COMMANDS_OUT_OF_SYNC, unknown_sqlstate);
DBUG_RETURN(1);
}
net_clear_error(net);
mysql->info=0;
mysql->affected_rows= ~(my_ulonglong) 0;
/*
Do not check the socket/protocol buffer on COM_QUIT as the
result of a previous command might not have been read. This
can happen if a client sends a query but does not reap the
result before attempting to close the connection.
*/
net_clear(&mysql->net, (command != COM_QUIT));
#if !defined(EMBEDDED_LIBRARY)
/*
If auto-reconnect mode is enabled check if connection is still alive before
sending new command. Otherwise, send() might not notice that connection was
closed by the server (for example, due to KILL statement), and the fact that
connection is gone will be noticed only on attempt to read command's result,
when it is too late to reconnect. Note that such scenario can still occur if
connection gets killed after this check but before command is sent to
server. But this should be rare.
*/
if ((command != COM_QUIT) && mysql->reconnect && !vio_is_connected(net->vio))
net->error= 2;
#endif
if (net_write_command(net,(uchar) command, header, header_length,
arg, arg_length))
{
DBUG_PRINT("error",("Can't send command to server. Error: %d",
socket_errno));
if (net->last_errno == ER_NET_PACKET_TOO_LARGE)
{
set_mysql_error(mysql, CR_NET_PACKET_TOO_LARGE, unknown_sqlstate);
goto end;
}
end_server(mysql);
if (mysql_reconnect(mysql) || stmt_skip)
goto end;
if (net_write_command(net,(uchar) command, header, header_length,
arg, arg_length))
{
set_mysql_error(mysql, CR_SERVER_GONE_ERROR, unknown_sqlstate);
goto end;
}
}
result=0;
if (!skip_check)
result= ((mysql->packet_length=cli_safe_read(mysql)) == packet_error ?
1 : 0);
end:
DBUG_PRINT("exit",("result: %d", result));
DBUG_RETURN(result);
}
void free_old_query(MYSQL *mysql)
{
DBUG_ENTER("free_old_query");
if (mysql->fields)
free_root(&mysql->field_alloc,MYF(0));
init_alloc_root(&mysql->field_alloc,8192,0); /* Assume rowlength < 8192 */
mysql->fields= 0;
mysql->field_count= 0; /* For API */
mysql->warning_count= 0;
mysql->info= 0;
DBUG_VOID_RETURN;
}
/**
Finish reading of a partial result set from the server.
Get the EOF packet, and update mysql->status
and mysql->warning_count.
@return TRUE if a communication or protocol error, an error
is set in this case, FALSE otherwise.
*/
my_bool flush_one_result(MYSQL *mysql)
{
ulong packet_length;
DBUG_ASSERT(mysql->status != MYSQL_STATUS_READY);
do
{
packet_length= cli_safe_read(mysql);
/*
There is an error reading from the connection,
or (sic!) there were no error and no
data in the stream, i.e. no more data from the server.
Since we know our position in the stream (somewhere in
the middle of a result set), this latter case is an error too
-- each result set must end with a EOF packet.
cli_safe_read() has set an error for us, just return.
*/
if (packet_length == packet_error)
return TRUE;
}
while (packet_length > 8 || mysql->net.read_pos[0] != 254);
/* Analyze EOF packet of the result set. */
if (protocol_41(mysql))
{
char *pos= (char*) mysql->net.read_pos + 1;
mysql->warning_count=uint2korr(pos);
pos+=2;
mysql->server_status=uint2korr(pos);
pos+=2;
}
return FALSE;
}
/**
Read a packet from network. If it's an OK packet, flush it.
@return TRUE if error, FALSE otherwise. In case of
success, is_ok_packet is set to TRUE or FALSE,
based on what we got from network.
*/
my_bool opt_flush_ok_packet(MYSQL *mysql, my_bool *is_ok_packet)
{
ulong packet_length= cli_safe_read(mysql);
if (packet_length == packet_error)
return TRUE;
/* cli_safe_read always reads a non-empty packet. */
DBUG_ASSERT(packet_length);
*is_ok_packet= mysql->net.read_pos[0] == 0;
if (*is_ok_packet)
{
uchar *pos= mysql->net.read_pos + 1;
net_field_length_ll(&pos); /* affected rows */
net_field_length_ll(&pos); /* insert id */
mysql->server_status=uint2korr(pos);
pos+=2;
if (protocol_41(mysql))
{
mysql->warning_count=uint2korr(pos);
pos+=2;
}
}
return FALSE;
}
/*
Flush result set sent from server
*/
static void cli_flush_use_result(MYSQL *mysql, my_bool flush_all_results)
{
/* Clear the current execution status */
DBUG_ENTER("cli_flush_use_result");
DBUG_PRINT("warning",("Not all packets read, clearing them"));
if (flush_one_result(mysql))
DBUG_VOID_RETURN; /* An error occurred */
if (! flush_all_results)
DBUG_VOID_RETURN;
while (mysql->server_status & SERVER_MORE_RESULTS_EXISTS)
{
my_bool is_ok_packet;
if (opt_flush_ok_packet(mysql, &is_ok_packet))
DBUG_VOID_RETURN; /* An error occurred. */
if (is_ok_packet)
{
/*
Indeed what we got from network was an OK packet, and we
know that OK is the last one in a multi-result-set, so
just return.
*/
DBUG_VOID_RETURN;
}
/*
It's a result set, not an OK packet. A result set contains
of two result set subsequences: field metadata, terminated
with EOF packet, and result set data, again terminated with
EOF packet. Read and flush them.
*/
if (flush_one_result(mysql) || flush_one_result(mysql))
DBUG_VOID_RETURN; /* An error occurred. */
}
DBUG_VOID_RETURN;
}
#ifdef __WIN__
static my_bool is_NT(void)
{
char *os=getenv("OS");
return (os && !strcmp(os, "Windows_NT")) ? 1 : 0;
}
#endif
#ifdef CHECK_LICENSE
/**
Check server side variable 'license'.
If the variable does not exist or does not contain 'Commercial',
we're talking to non-commercial server from commercial client.
@retval 0 success
@retval !0 network error or the server is not commercial.
Error code is saved in mysql->net.last_errno.
*/
static int check_license(MYSQL *mysql)
{
MYSQL_ROW row;
MYSQL_RES *res;
NET *net= &mysql->net;
static const char query[]= "SELECT @@license";
static const char required_license[]= STRINGIFY_ARG(LICENSE);
if (mysql_real_query(mysql, query, sizeof(query)-1))
{
if (net->last_errno == ER_UNKNOWN_SYSTEM_VARIABLE)
{
set_mysql_extended_error(mysql, CR_WRONG_LICENSE, unknown_sqlstate,
ER(CR_WRONG_LICENSE), required_license);
}
return 1;
}
if (!(res= mysql_use_result(mysql)))
return 1;
row= mysql_fetch_row(res);
/*
If no rows in result set, or column value is NULL (none of these
two is ever true for server variables now), or column value
mismatch, set wrong license error.
*/
if (!net->last_errno &&
(!row || !row[0] ||
strncmp(row[0], required_license, sizeof(required_license))))
{
set_mysql_extended_error(mysql, CR_WRONG_LICENSE, unknown_sqlstate,
ER(CR_WRONG_LICENSE), required_license);
}
mysql_free_result(res);
return net->last_errno;
}
#endif /* CHECK_LICENSE */
/**************************************************************************
Shut down connection
**************************************************************************/
void end_server(MYSQL *mysql)
{
int save_errno= errno;
DBUG_ENTER("end_server");
if (mysql->net.vio != 0)
{
DBUG_PRINT("info",("Net: %s", vio_description(mysql->net.vio)));
#ifdef MYSQL_SERVER
slave_io_thread_detach_vio();
#endif
vio_delete(mysql->net.vio);
mysql->net.vio= 0; /* Marker */
mysql_prune_stmt_list(mysql);
}
net_end(&mysql->net);
free_old_query(mysql);
errno= save_errno;
DBUG_VOID_RETURN;
}
void STDCALL
mysql_free_result(MYSQL_RES *result)
{
DBUG_ENTER("mysql_free_result");