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