server/serial.c

   1 /*
   2  * Server-side serial port communications management
   3  *
   4  * Copyright (C) 1998 Alexandre Julliard
   5  * Copyright (C) 2000 Mike McCormack
   6  *
   7  * TODO:
   8  *  Add async read, write and WaitCommEvent handling.
   9  *
  10  */
  11
  12 #include "config.h"
  13
  14 #include <assert.h>
  15 #include <fcntl.h>
  16 #include <stdio.h>
  17 #include <string.h>
  18 #include <stdlib.h>
  19 #include <errno.h>
  20 #ifdef HAVE_SYS_ERRNO_H
  21 #include <sys/errno.h>
  22 #endif
  23 #include <sys/time.h>
  24 #include <sys/types.h>
  25 #include <time.h>
  26 #include <unistd.h>
  27 #include <utime.h>
  28 #include <termios.h>
  29 #include <sys/ioctl.h>
  30
  31 #include "winerror.h"
  32 #include "winbase.h"
  33
  34 #include "handle.h"
  35 #include "thread.h"
  36 #include "request.h"
  37
  38 static void serial_dump( struct object *obj, int verbose );
  39 static int serial_get_fd( struct object *obj );
  40 static int serial_get_info( struct object *obj, struct get_file_info_request *req );
  41 static int serial_get_poll_events( struct object *obj );
  42
  43 struct serial
  44 {
  45     struct object       obj;
  46     unsigned int        access;
  47
  48     /* timeout values */
  49     unsigned int        readinterval;
  50     unsigned int        readconst;
  51     unsigned int        readmult;
  52     unsigned int        writeconst;
  53     unsigned int        writemult;
  54
  55     unsigned int        eventmask;
  56     unsigned int        commerror;
  57
  58     struct termios      original;
  59
  60     /* FIXME: add dcb, comm status, handler module, sharing */
  61 };
  62
  63 static const struct object_ops serial_ops =
  64 {
  65     sizeof(struct serial),        /* size */
  66     serial_dump,                  /* dump */
  67     default_poll_add_queue,       /* add_queue */
  68     default_poll_remove_queue,    /* remove_queue */
  69     default_poll_signaled,        /* signaled */
  70     no_satisfied,                 /* satisfied */
  71     serial_get_poll_events,       /* get_poll_events */
  72     default_poll_event,           /* poll_event */
  73     serial_get_fd,                /* get_fd */
  74     no_flush,                     /* flush */
  75     serial_get_info,              /* get_file_info */
  76     no_destroy                    /* destroy */
  77 };
  78
  79 /* SERIAL PORT functions */
  80
  81 static struct serial *create_serial( const char *nameptr, size_t len, unsigned int access )
  82 {
  83     struct serial *serial;
  84     struct termios tios;
  85     int fd, flags = 0;
  86     char *name;
  87
  88     if (!(name = mem_alloc( len + 1 ))) return NULL;
  89     memcpy( name, nameptr, len );
  90     name[len] = 0;
  91
  92     switch(access & (GENERIC_READ | GENERIC_WRITE))
  93     {
  94     case GENERIC_READ:  flags |= O_RDONLY; break;
  95     case GENERIC_WRITE: flags |= O_WRONLY; break;
  96     case GENERIC_READ|GENERIC_WRITE: flags |= O_RDWR; break;
  97     default: break;
  98     }
  99
 100     fd = open( name, flags );
 101     free( name );
 102     if (fd < 0)
 103     {
 104         file_set_error();
 105         return NULL;
 106     }
 107
 108     /* check its really a serial port */
 109     if (tcgetattr(fd,&tios))
 110     {
 111         file_set_error();
 112         close( fd );
 113         return NULL;
 114     }
 115
 116     if ((serial = alloc_object( &serial_ops, fd )))
 117     {
 118         serial->access       = access;
 119         serial->readinterval = 0;
 120         serial->readmult     = 0;
 121         serial->readconst    = 0;
 122         serial->writemult    = 0;
 123         serial->writeconst   = 0;
 124         serial->eventmask    = 0;
 125         serial->commerror    = 0;
 126     }
 127     return serial;
 128 }
 129
 130 static void serial_dump( struct object *obj, int verbose )
 131 {
 132     struct serial *serial = (struct serial *)obj;
 133     assert( obj->ops == &serial_ops );
 134     fprintf( stderr, "Port fd=%d mask=%x\n", serial->obj.fd, serial->eventmask );
 135 }
 136
 137 struct serial *get_serial_obj( struct process *process, handle_t handle, unsigned int access )
 138 {
 139     return (struct serial *)get_handle_obj( process, handle, access, &serial_ops );
 140 }
 141
 142 static int serial_get_poll_events( struct object *obj )
 143 {
 144     struct serial *serial = (struct serial *)obj;
 145     int events = 0;
 146     assert( obj->ops == &serial_ops );
 147     if (serial->access & GENERIC_READ) events |= POLLIN;
 148     if (serial->access & GENERIC_WRITE) events |= POLLOUT;
 149     return events;
 150 }
 151
 152 static int serial_get_fd( struct object *obj )
 153 {
 154     struct serial *serial = (struct serial *)obj;
 155     assert( obj->ops == &serial_ops );
 156     return serial->obj.fd;
 157 }
 158
 159 static int serial_get_info( struct object *obj, struct get_file_info_request *req )
 160 {
 161     assert( obj->ops == &serial_ops );
 162     req->type        = FILE_TYPE_CHAR;
 163     req->attr        = 0;
 164     req->access_time = 0;
 165     req->write_time  = 0;
 166     req->size_high   = 0;
 167     req->size_low    = 0;
 168     req->links       = 0;
 169     req->index_high  = 0;
 170     req->index_low   = 0;
 171     req->serial      = 0;
 172     return 1;
 173 }
 174
 175 /* these function calculates the timeout for an async operation
 176    on a serial port */
 177 int get_serial_async_timeout(struct object *obj, int type, int count)
 178 {
 179     struct serial *serial = (struct serial *)obj;
 180
 181     if(obj->ops != &serial_ops)
 182         return 0;
 183
 184     switch(type)
 185     {
 186     case ASYNC_TYPE_READ:
 187         return serial->readconst + serial->readmult*count;
 188     case ASYNC_TYPE_WRITE:
 189         return serial->writeconst + serial->writemult*count;
 190     }
 191     return 0;
 192 }
 193
 194
 195 /* create a serial */
 196 DECL_HANDLER(create_serial)
 197 {
 198     struct serial *serial;
 199
 200     req->handle = 0;
 201     if ((serial = create_serial( get_req_data(req), get_req_data_size(req), req->access )))
 202     {
 203         req->handle = alloc_handle( current->process, serial, req->access, req->inherit );
 204         release_object( serial );
 205     }
 206 }
 207
 208 DECL_HANDLER(get_serial_info)
 209 {
 210     struct serial *serial;
 211
 212     if ((serial = get_serial_obj( current->process, req->handle, 0 )))
 213     {
 214         /* timeouts */
 215         req->readinterval = serial->readinterval;
 216         req->readconst    = serial->readconst;
 217         req->readmult     = serial->readmult;
 218         req->writeconst   = serial->writeconst;
 219         req->writemult    = serial->writemult;
 220
 221         /* event mask */
 222         req->eventmask    = serial->eventmask;
 223
 224         /* comm port error status */
 225         req->commerror    = serial->commerror;
 226
 227         release_object( serial );
 228     }
 229 }
 230
 231 DECL_HANDLER(set_serial_info)
 232 {
 233     struct serial *serial;
 234
 235     if ((serial = get_serial_obj( current->process, req->handle, 0 )))
 236     {
 237         /* timeouts */
 238         if(req->flags & SERIALINFO_SET_TIMEOUTS)
 239         {
 240             serial->readinterval = req->readinterval;
 241             serial->readconst    = req->readconst;
 242             serial->readmult     = req->readmult;
 243             serial->writeconst   = req->writeconst;
 244             serial->writemult    = req->writemult;
 245         }
 246
 247         /* event mask */
 248         if(req->flags & SERIALINFO_SET_MASK)
 249         {
 250             serial->eventmask = req->eventmask;
 251         }
 252
 253         /* comm port error status */
 254         if(req->flags & SERIALINFO_SET_ERROR)
 255         {
 256             serial->commerror = req->commerror;
 257         }
 258
 259         release_object( serial );
 260     }
 261 }
 262