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mariadb/vio/vio.c
Alexander Barkov 11005f3413 Merge 5.3->5.5
2013-10-16 18:17:51 +04:00

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9.2 KiB
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/* Copyright (c) 2000, 2010, 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 02110-1301 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"
#if defined(__WIN__) || defined(HAVE_SMEM)
/**
Stub poll_read method that defaults to indicate that there
is data to read.
Used for named pipe and shared memory VIO types.
@param vio Unused.
@param timeout Unused.
@retval FALSE There is data to read.
*/
static my_bool no_poll_read(Vio *vio __attribute__((unused)),
uint timeout __attribute__((unused)))
{
return FALSE;
}
#endif
static my_bool has_no_data(Vio *vio __attribute__((unused)))
{
return FALSE;
}
#ifdef _WIN32
my_bool vio_shared_memory_has_data(Vio *vio)
{
return (vio->shared_memory_remain > 0);
}
int vio_shared_memory_shutdown(Vio *vio, int how)
{
SetEvent(vio->event_conn_closed);
SetEvent(vio->event_server_wrote);
return 0;
}
int vio_pipe_shutdown(Vio *vio, int how)
{
return cancel_io(vio->hPipe, vio->thread_id);
}
#endif
/*
* Helper to fill most of the Vio* with defaults.
*/
static void vio_init(Vio* vio, enum enum_vio_type type,
my_socket sd, HANDLE hPipe, uint flags)
{
DBUG_ENTER("vio_init");
DBUG_PRINT("enter", ("type: %d sd: %d flags: %d", type, sd, flags));
#ifndef HAVE_VIO_READ_BUFF
flags&= ~VIO_BUFFERED_READ;
#endif
bzero((char*) vio, sizeof(*vio));
vio->type = type;
vio->sd = sd;
vio->hPipe = hPipe;
vio->localhost= flags & VIO_LOCALHOST;
if ((flags & VIO_BUFFERED_READ) &&
!(vio->read_buffer= (char*)my_malloc(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_interrupted=vio_was_interrupted;
vio->vioclose =vio_close_pipe;
vio->peer_addr =vio_peer_addr;
vio->vioblocking =vio_blocking;
vio->is_blocking =vio_is_blocking;
vio->poll_read =no_poll_read;
vio->is_connected =vio_is_connected_pipe;
vio->has_data =has_no_data;
vio->shutdown =vio_pipe_shutdown;
vio->timeout=vio_win32_timeout;
/* Set default timeout */
vio->read_timeout_ms= INFINITE;
vio->write_timeout_ms= INFINITE;
vio->pipe_overlapped.hEvent= CreateEvent(NULL, TRUE, FALSE, NULL);
DBUG_VOID_RETURN;
}
#endif
#ifdef HAVE_SMEM
if (type == VIO_TYPE_SHARED_MEMORY)
{
vio->viodelete =vio_delete;
vio->vioerrno =vio_errno;
vio->read =vio_read_shared_memory;
vio->write =vio_write_shared_memory;
vio->fastsend =vio_fastsend;
vio->viokeepalive =vio_keepalive;
vio->should_retry =vio_should_retry;
vio->was_interrupted=vio_was_interrupted;
vio->vioclose =vio_close_shared_memory;
vio->peer_addr =vio_peer_addr;
vio->vioblocking =vio_blocking;
vio->is_blocking =vio_is_blocking;
vio->poll_read =no_poll_read;
vio->is_connected =vio_is_connected_shared_memory;
vio->has_data =vio_shared_memory_has_data;
vio->shutdown =vio_shared_memory_shutdown;
/* Currently, shared memory is on Windows only, hence the below is ok*/
vio->timeout= vio_win32_timeout;
/* Set default timeout */
vio->read_timeout_ms= INFINITE;
vio->write_timeout_ms= INFINITE;
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_interrupted=vio_was_interrupted;
vio->vioclose =vio_ssl_close;
vio->peer_addr =vio_peer_addr;
vio->vioblocking =vio_ssl_blocking;
vio->is_blocking =vio_is_blocking;
vio->timeout =vio_timeout;
vio->poll_read =vio_poll_read;
vio->is_connected =vio_is_connected;
vio->has_data =vio_ssl_has_data;
vio->shutdown =vio_socket_shutdown;
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_interrupted =vio_was_interrupted;
vio->vioclose =vio_close;
vio->peer_addr =vio_peer_addr;
vio->vioblocking =vio_blocking;
vio->is_blocking =vio_is_blocking;
vio->timeout =vio_timeout;
vio->poll_read =vio_poll_read;
vio->is_connected =vio_is_connected;
vio->shutdown =vio_socket_shutdown;
vio->has_data= (flags & VIO_BUFFERED_READ) ?
vio_buff_has_data : has_no_data;
DBUG_VOID_RETURN;
}
/* Reset initialized VIO to use with another transport type */
void vio_reset(Vio* vio, enum enum_vio_type type,
my_socket sd, HANDLE hPipe, uint flags)
{
my_free(vio->read_buffer);
vio_init(vio, type, sd, hPipe, flags);
}
/* 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;
DBUG_ENTER("vio_new");
DBUG_PRINT("enter", ("sd: %d", sd));
if ((vio = (Vio*) my_malloc(sizeof(*vio),MYF(MY_WME))))
{
vio_init(vio, type, sd, 0, flags);
sprintf(vio->desc,
(vio->type == VIO_TYPE_SOCKET ? "socket (%d)" : "TCP/IP (%d)"),
vio->sd);
#if !defined(__WIN__)
#if !defined(NO_FCNTL_NONBLOCK)
/*
We call fcntl() to set the flags and then immediately read them back
to make sure that we and the system are in agreement on the state of
things.
An example of why we need to do this is FreeBSD (and apparently some
other BSD-derived systems, like Mac OS X), where the system sometimes
reports that the socket is set for non-blocking when it really will
block.
*/
fcntl(sd, F_SETFL, 0);
vio->fcntl_mode= fcntl(sd, F_GETFL);
#elif defined(HAVE_SYS_IOCTL_H) /* hpux */
/* Non blocking sockets doesn't work good on HPUX 11.0 */
(void) ioctl(sd,FIOSNBIO,0);
vio->fcntl_mode &= ~O_NONBLOCK;
#endif
#else /* !defined(__WIN__) */
{
/* set to blocking mode by default */
ulong arg=0, r;
r = ioctlsocket(sd,FIONBIO,(void*) &arg);
vio->fcntl_mode &= ~O_NONBLOCK;
}
#endif
}
DBUG_RETURN(vio);
}
#ifdef __WIN__
Vio *vio_new_win32pipe(HANDLE hPipe)
{
Vio *vio;
DBUG_ENTER("vio_new_handle");
if ((vio = (Vio*) my_malloc(sizeof(Vio),MYF(MY_WME))))
{
vio_init(vio, VIO_TYPE_NAMEDPIPE, 0, hPipe, VIO_LOCALHOST);
strmov(vio->desc, "named pipe");
}
DBUG_RETURN(vio);
}
#ifdef HAVE_SMEM
Vio *vio_new_win32shared_memory(HANDLE handle_file_map, HANDLE handle_map,
HANDLE event_server_wrote, HANDLE event_server_read,
HANDLE event_client_wrote, HANDLE event_client_read,
HANDLE event_conn_closed)
{
Vio *vio;
DBUG_ENTER("vio_new_win32shared_memory");
if ((vio = (Vio*) my_malloc(sizeof(Vio),MYF(MY_WME))))
{
vio_init(vio, VIO_TYPE_SHARED_MEMORY, 0, 0, VIO_LOCALHOST);
vio->handle_file_map= handle_file_map;
vio->handle_map= handle_map;
vio->event_server_wrote= event_server_wrote;
vio->event_server_read= event_server_read;
vio->event_client_wrote= event_client_wrote;
vio->event_client_read= event_client_read;
vio->event_conn_closed= event_conn_closed;
vio->shared_memory_remain= 0;
vio->shared_memory_pos= handle_map;
strmov(vio->desc, "shared memory");
}
DBUG_RETURN(vio);
}
#endif
#endif
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_YASSL
yaSSL_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
}
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