Quelle vio.c
Sprache: C
/* Copyright (c) 2000, 2012, Oracle and/or its affiliates. All rights reserved.
Copyright ( c ) 2012 , Monty Program 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1335 USA */
/*
Note that we can ' t have assertion on file descriptors ; The reason for
this is that during mysql shutdown , another thread can close a file
we are working on . In this case we should just return read errors from
the file descriptior .
*/
#include "vio_priv.h"
#include "ssl_compat.h"
PSI_memory_key key_memory_vio_ssl_fd;
PSI_memory_key key_memory_vio;
PSI_memory_key key_memory_vio_read_buffer;
#ifdef HAVE_PSI_INTERFACE
static PSI_memory_info all_vio_memory[]=
{
{&key_memory_vio_ssl_fd, "ssl_fd" , 0 },
{&key_memory_vio, "vio" , 0 },
{&key_memory_vio_read_buffer, "read_buffer" , 0 },
};
void init_vio_psi_keys()
{
const char * category= "vio" ;
int count;
count= array_elements(all_vio_memory);
mysql_memory_register(category, all_vio_memory, count);
}
#endif
#ifdef _WIN32
/**
Stub io_wait method that defaults to indicate that
requested I / O event is ready .
Used for named pipe and shared memory VIO types .
@ param vio Unused .
@ param event Unused .
@ param timeout Unused .
@ retval 1 The requested I / O event has occurred .
*/
static int no_io_wait(Vio *vio __attribute__((unused)),
enum enum_vio_io_event event __attribute__((unused)),
int timeout __attribute__((unused)))
{
return 1 ;
}
#endif
static my_bool has_no_data(Vio *vio __attribute__((unused)))
{
return FALSE ;
}
#ifdef _WIN32
int vio_pipe_shutdown(Vio *vio, int how)
{
vio->shutdown_flag= how;
vio->state= VIO_STATE_SHUTDOWN;
return CancelIoEx(vio->hPipe, NULL);
}
#endif
/*
* Helper to fill most of the Vio * with defaults .
*/
static void vio_init(Vio *vio, enum enum_vio_type type,
my_socket sd, uint flags)
{
DBUG_ENTER("vio_init" );
DBUG_PRINT("enter" , ("type: %d sd: %d flags: %d" , type, (int )sd, flags));
#ifndef HAVE_VIO_READ_BUFF
flags&= ~VIO_BUFFERED_READ;
#endif
memset(vio, 0 , sizeof (*vio));
vio->type= type;
vio->state= VIO_STATE_ACTIVE;
vio->mysql_socket= MYSQL_INVALID_SOCKET;
mysql_socket_setfd(&vio->mysql_socket, sd);
vio->localhost= flags & VIO_LOCALHOST;
vio->read_timeout= vio->write_timeout= -1 ;
if ((flags & VIO_BUFFERED_READ) &&
!(vio->read_buffer= (char *)my_malloc(key_memory_vio_read_buffer,
VIO_READ_BUFFER_SIZE, MYF(MY_WME))))
flags&= ~VIO_BUFFERED_READ;
#ifdef _WIN32
if (type == VIO_TYPE_NAMEDPIPE)
{
vio->viodelete =vio_delete;
vio->vioerrno =vio_errno;
vio->read =vio_read_pipe;
vio->write =vio_write_pipe;
vio->fastsend =vio_fastsend;
vio->viokeepalive =vio_keepalive;
vio->should_retry =vio_should_retry;
vio->was_timeout =vio_was_timeout;
vio->vioclose =vio_close_pipe;
vio->peer_addr =vio_peer_addr;
vio->vioblocking =vio_blocking;
vio->is_blocking =vio_is_blocking;
vio->io_wait =no_io_wait;
vio->is_connected =vio_is_connected_pipe;
vio->has_data =has_no_data;
vio->shutdown =vio_pipe_shutdown;
DBUG_VOID_RETURN;
}
#endif
#ifdef HAVE_OPENSSL
if (type == VIO_TYPE_SSL)
{
vio->viodelete =vio_ssl_delete;
vio->vioerrno =vio_errno;
vio->read =vio_ssl_read;
vio->write =vio_ssl_write;
vio->fastsend =vio_fastsend;
vio->viokeepalive =vio_keepalive;
vio->should_retry =vio_should_retry;
vio->was_timeout =vio_was_timeout;
vio->vioclose =vio_ssl_close;
vio->peer_addr =vio_peer_addr;
vio->vioblocking =vio_ssl_blocking;
vio->is_blocking =vio_is_blocking;
vio->io_wait =vio_io_wait;
vio->is_connected =vio_is_connected;
vio->has_data =vio_ssl_has_data;
vio->shutdown =vio_socket_shutdown;
vio->timeout =vio_socket_timeout;
DBUG_VOID_RETURN;
}
#endif /* HAVE_OPENSSL */
vio->viodelete =vio_delete;
vio->vioerrno =vio_errno;
vio->read= (flags & VIO_BUFFERED_READ) ? vio_read_buff : vio_read;
vio->write =vio_write;
vio->fastsend =vio_fastsend;
vio->viokeepalive =vio_keepalive;
vio->should_retry =vio_should_retry;
vio->was_timeout =vio_was_timeout;
vio->vioclose =vio_close;
vio->peer_addr =vio_peer_addr;
vio->vioblocking =vio_blocking;
vio->is_blocking =vio_is_blocking;
vio->io_wait =vio_io_wait;
vio->is_connected =vio_is_connected;
vio->shutdown =vio_socket_shutdown;
vio->timeout =vio_socket_timeout;
vio->has_data = ((flags & VIO_BUFFERED_READ) ?
vio_buff_has_data : has_no_data);
DBUG_VOID_RETURN;
}
/**
Reinitialize an existing Vio object .
@ remark Used to rebind an initialized socket - based Vio object
to another socket - based transport type . For example ,
rebind a TCP / IP transport to SSL .
@ param vio A VIO object .
@ param type A socket - based transport type .
@ param sd The socket .
@ param ssl An optional SSL structure .
@ param flags Flags passed to vio_init .
@ return Return value is zero on success .
*/
my_bool vio_reset(Vio* vio, enum enum_vio_type type,
my_socket sd, void *ssl __attribute__((unused)), uint flags)
{
int ret= FALSE ;
Vio old_vio= *vio;
DBUG_ENTER("vio_reset" );
/* The only supported rebind is from a socket-based transport type. */
DBUG_ASSERT(vio->type == VIO_TYPE_TCPIP || vio->type == VIO_TYPE_SOCKET);
/*
Will be reinitialized depending on the flags .
Nonetheless , already buffered inside the SSL layer .
*/
my_free(vio->read_buffer);
vio_init(vio, type, sd, flags);
/* Preserve perfschema info for this connection */
vio->mysql_socket.m_psi= old_vio.mysql_socket.m_psi;
#ifdef HAVE_OPENSSL
vio->ssl_arg= ssl;
#endif
/*
Propagate the timeout values . Necessary to also propagate
the underlying proprieties associated with the timeout ,
such as the socket blocking mode .
note : old_vio . read_timeout / old_vio . write_timeout is stored in ms
but vio_timeout ( ) takes seconds as argument , hence the / 1000
*/
if (old_vio.read_timeout >= 0 )
ret|= vio_timeout(vio, 0 , old_vio.read_timeout / 1000 );
if (old_vio.write_timeout >= 0 )
ret|= vio_timeout(vio, 1 , old_vio.write_timeout / 1000 );
DBUG_RETURN(MY_TEST(ret));
}
/* Create a new VIO for socket or TCP/IP connection. */
Vio *mysql_socket_vio_new(MYSQL_SOCKET mysql_socket, enum enum_vio_type type, uint flags)
{
Vio *vio;
my_socket sd= mysql_socket_getfd(mysql_socket);
DBUG_ENTER("mysql_socket_vio_new" );
DBUG_PRINT("enter" , ("sd: %d" , (int )sd));
if ((vio = (Vio*) my_malloc(key_memory_vio, sizeof (*vio), MYF(MY_WME))))
{
vio_init(vio, type, sd, flags);
vio->desc= (vio->type == VIO_TYPE_SOCKET ? "socket" : "TCP/IP" );
vio->mysql_socket= mysql_socket;
}
DBUG_RETURN(vio);
}
/* Open the socket or TCP/IP connection and read the fnctl() status */
Vio *vio_new(my_socket sd, enum enum_vio_type type, uint flags)
{
Vio *vio;
MYSQL_SOCKET mysql_socket= MYSQL_INVALID_SOCKET;
DBUG_ENTER("vio_new" );
DBUG_PRINT("enter" , ("sd: %d" , (int )sd));
mysql_socket_setfd(&mysql_socket, sd);
vio = mysql_socket_vio_new(mysql_socket, type, flags);
DBUG_RETURN(vio);
}
#ifdef _WIN32
Vio *vio_new_win32pipe(HANDLE hPipe)
{
Vio *vio;
DBUG_ENTER("vio_new_handle" );
if ((vio = (Vio*) my_malloc(PSI_INSTRUMENT_ME, sizeof (Vio),MYF(MY_WME))))
{
vio_init(vio, VIO_TYPE_NAMEDPIPE, 0 , VIO_LOCALHOST);
vio->desc= "named pipe" ;
/* Create an object for event notification. */
vio->overlapped.hEvent= CreateEvent(NULL, FALSE , FALSE , NULL);
if (vio->overlapped.hEvent == NULL)
{
my_free(vio);
DBUG_RETURN(NULL);
}
vio->hPipe= hPipe;
}
DBUG_RETURN(vio);
}
#endif
/**
Set timeout for a network send or receive operation .
@ remark A non - infinite timeout causes the socket to be
set to non - blocking mode . On infinite timeouts ,
the socket is set to blocking mode .
@ remark A negative timeout means an infinite timeout .
@ param vio A VIO object .
@ param which Whether timeout is for send ( 1 ) or receive ( 0 ) .
@ param timeout Timeout interval in seconds .
@ return FALSE on success , TRUE otherwise .
*/
int vio_timeout(Vio *vio, uint which, int timeout_sec)
{
int timeout_ms;
my_bool old_mode;
/*
Vio timeouts are measured in milliseconds . Check for a possible
overflow . In case of overflow , set to infinite .
*/
if (timeout_sec > INT_MAX/1000 )
timeout_ms= -1 ;
else
timeout_ms= (int ) (timeout_sec * 1000 );
/* Deduce the current timeout status mode. */
old_mode= vio->write_timeout < 0 && vio->read_timeout < 0 ;
if (which)
vio->write_timeout= timeout_ms;
else
vio->read_timeout= timeout_ms;
/* VIO-specific timeout handling. Might change the blocking mode. */
return vio->timeout ? vio->timeout(vio, which, old_mode) : 0 ;
}
void vio_delete(Vio* vio)
{
if (!vio)
return ; /* It must be safe to delete null pointers. */
if (vio->type != VIO_CLOSED)
vio->vioclose(vio);
my_free(vio->read_buffer);
my_free(vio);
}
/*
Cleanup memory allocated by vio or the
components below it when application finish
*/
void vio_end(void )
{
#ifdef HAVE_WOLFSSL
wolfSSL_Cleanup();
#elif defined (HAVE_OPENSSL)
// This one is needed on the client side
ERR_remove_state(0 );
ERR_free_strings();
EVP_cleanup();
CRYPTO_cleanup_all_ex_data();
#endif
}
Messung V0.5 in Prozent C=95 H=100 G=97
¤ Dauer der Verarbeitung: 0.1 Sekunden
(vorverarbeitet am 2026-10-08)
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*© Formatika GbR, Deutschland
2026-10-10
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