Sweden-Number/server/serial.c

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/*
* Server-side serial port communications management
*
* Copyright (C) 1998 Alexandre Julliard
* Copyright (C) 2000 Mike McCormack
*
* TODO:
* Add async read, write and WaitCommEvent handling.
*
*/
#include "config.h"
#include <assert.h>
#include <fcntl.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <errno.h>
#ifdef HAVE_SYS_ERRNO_H
#include <sys/errno.h>
#endif
#include <sys/time.h>
#include <sys/types.h>
#include <time.h>
#include <unistd.h>
#include <utime.h>
#include <termios.h>
#include <sys/ioctl.h>
#include "winerror.h"
#include "winbase.h"
#include "handle.h"
#include "thread.h"
#include "request.h"
static void serial_dump( struct object *obj, int verbose );
static int serial_get_fd( struct object *obj );
static int serial_get_info( struct object *obj, struct get_file_info_reply *reply );
static int serial_get_poll_events( struct object *obj );
struct serial
{
struct object obj;
unsigned int access;
unsigned int attrib;
/* timeout values */
unsigned int readinterval;
unsigned int readconst;
unsigned int readmult;
unsigned int writeconst;
unsigned int writemult;
unsigned int eventmask;
unsigned int commerror;
struct termios original;
/* FIXME: add dcb, comm status, handler module, sharing */
};
static const struct object_ops serial_ops =
{
sizeof(struct serial), /* size */
serial_dump, /* dump */
default_poll_add_queue, /* add_queue */
default_poll_remove_queue, /* remove_queue */
default_poll_signaled, /* signaled */
no_satisfied, /* satisfied */
serial_get_poll_events, /* get_poll_events */
default_poll_event, /* poll_event */
serial_get_fd, /* get_fd */
no_flush, /* flush */
serial_get_info, /* get_file_info */
no_destroy /* destroy */
};
/* SERIAL PORT functions */
static struct serial *create_serial( const char *nameptr, size_t len, unsigned int access, int attributes )
{
struct serial *serial;
struct termios tios;
int fd, flags = 0;
char *name;
if (!(name = mem_alloc( len + 1 ))) return NULL;
memcpy( name, nameptr, len );
name[len] = 0;
switch(access & (GENERIC_READ | GENERIC_WRITE))
{
case GENERIC_READ: flags |= O_RDONLY; break;
case GENERIC_WRITE: flags |= O_WRONLY; break;
case GENERIC_READ|GENERIC_WRITE: flags |= O_RDWR; break;
default: break;
}
flags |= O_NONBLOCK;
fd = open( name, flags );
free( name );
if (fd < 0)
{
file_set_error();
return NULL;
}
/* check its really a serial port */
if (tcgetattr(fd,&tios))
{
file_set_error();
close( fd );
return NULL;
}
/* set the fd back to blocking if necessary */
if( ! (attributes & FILE_FLAG_OVERLAPPED) )
if(0>fcntl(fd, F_SETFL, 0))
perror("fcntl");
if ((serial = alloc_object( &serial_ops, fd )))
{
serial->attrib = attributes;
serial->access = access;
serial->readinterval = 0;
serial->readmult = 0;
serial->readconst = 0;
serial->writemult = 0;
serial->writeconst = 0;
serial->eventmask = 0;
serial->commerror = 0;
}
return serial;
}
static void serial_dump( struct object *obj, int verbose )
{
struct serial *serial = (struct serial *)obj;
assert( obj->ops == &serial_ops );
fprintf( stderr, "Port fd=%d mask=%x\n", serial->obj.fd, serial->eventmask );
}
struct serial *get_serial_obj( struct process *process, handle_t handle, unsigned int access )
{
return (struct serial *)get_handle_obj( process, handle, access, &serial_ops );
}
static int serial_get_poll_events( struct object *obj )
{
struct serial *serial = (struct serial *)obj;
int events = 0;
assert( obj->ops == &serial_ops );
if (serial->access & GENERIC_READ) events |= POLLIN;
if (serial->access & GENERIC_WRITE) events |= POLLOUT;
return events;
}
static int serial_get_fd( struct object *obj )
{
struct serial *serial = (struct serial *)obj;
assert( obj->ops == &serial_ops );
return serial->obj.fd;
}
static int serial_get_info( struct object *obj, struct get_file_info_reply *reply )
{
struct serial *serial = (struct serial *) obj;
assert( obj->ops == &serial_ops );
if (reply)
{
reply->type = FILE_TYPE_CHAR;
reply->attr = 0;
reply->access_time = 0;
reply->write_time = 0;
reply->size_high = 0;
reply->size_low = 0;
reply->links = 0;
reply->index_high = 0;
reply->index_low = 0;
reply->serial = 0;
}
if(serial->attrib & FILE_FLAG_OVERLAPPED)
return FD_TYPE_OVERLAPPED;
return FD_TYPE_TIMEOUT;
}
/* these function calculates the timeout for an async operation
on a serial port */
int get_serial_async_timeout(struct object *obj, int type, int count)
{
struct serial *serial = (struct serial *)obj;
if(obj->ops != &serial_ops)
return 0;
switch(type)
{
case ASYNC_TYPE_READ:
return serial->readconst + serial->readmult*count;
case ASYNC_TYPE_WRITE:
return serial->writeconst + serial->writemult*count;
}
return 0;
}
/* create a serial */
DECL_HANDLER(create_serial)
{
struct serial *serial;
reply->handle = 0;
if ((serial = create_serial( get_req_data(), get_req_data_size(), req->access, req->attributes )))
{
reply->handle = alloc_handle( current->process, serial, req->access, req->inherit );
release_object( serial );
}
}
DECL_HANDLER(get_serial_info)
{
struct serial *serial;
if ((serial = get_serial_obj( current->process, req->handle, 0 )))
{
/* timeouts */
reply->readinterval = serial->readinterval;
reply->readconst = serial->readconst;
reply->readmult = serial->readmult;
reply->writeconst = serial->writeconst;
reply->writemult = serial->writemult;
/* event mask */
reply->eventmask = serial->eventmask;
/* comm port error status */
reply->commerror = serial->commerror;
release_object( serial );
}
}
DECL_HANDLER(set_serial_info)
{
struct serial *serial;
if ((serial = get_serial_obj( current->process, req->handle, 0 )))
{
/* timeouts */
if(req->flags & SERIALINFO_SET_TIMEOUTS)
{
serial->readinterval = req->readinterval;
serial->readconst = req->readconst;
serial->readmult = req->readmult;
serial->writeconst = req->writeconst;
serial->writemult = req->writemult;
}
/* event mask */
if(req->flags & SERIALINFO_SET_MASK)
{
serial->eventmask = req->eventmask;
}
/* comm port error status */
if(req->flags & SERIALINFO_SET_ERROR)
{
serial->commerror = req->commerror;
}
release_object( serial );
}
}