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/* Copyright (C) 2000 MySQL AB & MySQL Finland AB & TCX DataKonsult AB
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with this library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
MA 02111-1307, 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 <my_global.h>
#include "mysql_embed.h"
#include "mysql.h"
#ifndef HAVE_VIO /* is Vio suppored by the Vio lib ? */
#include <errno.h>
#include <my_sys.h>
#include <violite.h>
#include <my_sys.h>
#include <my_net.h>
#include <m_string.h>
#include <dbug.h>
#include <assert.h>
#if defined(__EMX__)
#include <sys/ioctl.h>
#define ioctlsocket(A,B,C) ioctl((A),(B),(void *)(C),sizeof(*(C)))
#undef HAVE_FCNTL
#endif /* defined(__EMX__) */
#if defined(MSDOS) || defined(__WIN__)
#ifdef __WIN__
#undef errno
#undef EINTR
#undef EAGAIN
#define errno WSAGetLastError()
#define EINTR WSAEINTR
#define EAGAIN WSAEINPROGRESS
#endif /* __WIN__ */
#define O_NONBLOCK 1 /* For emulation of fcntl() */
#endif
#ifndef EWOULDBLOCK
#define EWOULDBLOCK EAGAIN
#endif
#ifndef __WIN__
#define HANDLE void *
#endif
struct st_vio
{
my_socket sd; /* my_socket - real or imaginary */
HANDLE hPipe;
my_bool localhost; /* Are we from localhost? */
int fcntl_mode; /* Buffered fcntl(sd,F_GETFL) */
struct sockaddr_in local; /* Local internet address */
struct sockaddr_in remote; /* Remote internet address */
enum enum_vio_type type; /* Type of connection */
char desc[30]; /* String description */
/* #ifdef EMBEDDED_LIBRARY */
/* void *dest_net; */
void *dest_thd;
char *packets, **last_packet;
char *where_in_packet, *end_of_packet;
my_bool reading;
MEM_ROOT root;
/* #endif */
};
/* Initialize the communication buffer */
Vio *vio_new(my_socket sd, enum enum_vio_type type, my_bool localhost)
{
Vio * vio = NULL;
vio = (Vio *) my_malloc (sizeof(*vio),MYF(MY_WME|MY_ZEROFILL));
if (vio)
{
init_alloc_root(&vio->root, 8192, 1024);
vio->root.min_malloc = sizeof(char *) + 4;
vio->last_packet = &vio->packets;
}
return (vio);
}
#ifdef __WIN__
Vio *vio_new_win32pipe(HANDLE hPipe)
{
return (NULL);
}
#endif
void vio_delete(Vio * vio)
{
if (vio)
{
if (vio->type != VIO_CLOSED) vio_close(vio);
free_root(&vio->root, MYF(0));
my_free((gptr)vio, MYF(0));
}
}
void vio_reset(Vio *vio)
{
free_root(&vio->root, MYF(MY_KEEP_PREALLOC));
vio->packets = vio->where_in_packet = vio->end_of_packet = 0;
vio->last_packet = &vio->packets;
}
int vio_errno(Vio *vio __attribute__((unused)))
{
return errno; /* On Win32 this mapped to WSAGetLastError() */
}
int vio_read(Vio * vio, gptr buf, int size)
{
vio->reading = 1;
if (vio->where_in_packet >= vio->end_of_packet)
{
dbug_assert(vio->packets);
vio->where_in_packet = vio->packets + sizeof(char *) + 4;
vio->end_of_packet = vio->where_in_packet +
uint4korr(vio->packets + sizeof(char *));
vio->packets = *(char **)vio->packets;
}
if (vio->where_in_packet + size > vio->end_of_packet)
size = vio->end_of_packet - vio->where_in_packet;
memcpy(buf, vio->where_in_packet, size);
vio->where_in_packet += size;
return (size);
}
int vio_write(Vio * vio, const gptr buf, int size)
{
char *packet;
if (vio->reading)
{
vio->reading = 0;
vio_reset(vio);
}
if ((packet = alloc_root(&vio->root, sizeof(char*) + 4 + size)))
{
*vio->last_packet = packet;
vio->last_packet = (char **)packet;
*((char **)packet) = 0; /* Set forward link to 0 */
packet += sizeof(char *);
int4store(packet, size);
memcpy(packet + 4, buf, size);
}
else
size= -1;
return (size);
}
int vio_blocking(Vio * vio, my_bool set_blocking_mode)
{
int r=0;
return (r);
}
my_bool
vio_is_blocking(Vio * vio)
{
my_bool r=0;
return(r);
}
int vio_fastsend(Vio * vio)
{
int r=0;
return(r);
}
int vio_keepalive(Vio* vio, my_bool set_keep_alive)
{
int r=0;
return (r);
}
my_bool
vio_should_retry(Vio * vio __attribute__((unused)))
{
int en = errno;
return en == EAGAIN || en == EINTR || en == EWOULDBLOCK;
}
int vio_close(Vio * vio)
{
int r=0;
return(r);
}
const char *vio_description(Vio * vio)
{
return "embedded vio";
}
enum enum_vio_type vio_type(Vio* vio)
{
return VIO_CLOSED;
}
my_socket vio_fd(Vio* vio)
{
return 0;
}
my_bool vio_peer_addr(Vio * vio, char *buf)
{
return(0);
}
void vio_in_addr(Vio *vio, struct in_addr *in)
{
}
my_bool vio_poll_read(Vio *vio,uint timeout)
{
return 0;
}
#endif /* HAVE_VIO */
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