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4696 mejdrech 1
/*
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 * Copyright (c) 2009 Lukas Mejdrech
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 * All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
8
 *
9
 * - Redistributions of source code must retain the above copyright
10
 *   notice, this list of conditions and the following disclaimer.
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 * - Redistributions in binary form must reproduce the above copyright
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 *   notice, this list of conditions and the following disclaimer in the
13
 *   documentation and/or other materials provided with the distribution.
14
 * - The name of the author may not be used to endorse or promote products
15
 *   derived from this software without specific prior written permission.
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 *
17
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27
 */
28
 
29
/** @addtogroup nildummy
30
 *  @{
31
 */
32
 
33
/** @file
34
 *  Dummy network interface layer module implementation.
35
 *  @see nildummy.h
36
 */
37
 
38
#include <async.h>
39
#include <malloc.h>
40
#include <mem.h>
41
#include <stdio.h>
42
#include <string.h>
43
 
44
#include <ipc/ipc.h>
45
#include <ipc/services.h>
46
 
47
#include "../../err.h"
48
#include "../../messages.h"
49
#include "../../modules.h"
50
 
51
#include "../../include/device.h"
52
#include "../../include/netif_interface.h"
53
#include "../../include/nil_interface.h"
54
#include "../../include/il_interface.h"
55
 
56
#include "../../structures/measured_strings.h"
57
#include "../../structures/packet/packet.h"
58
 
59
#include "../nil_module.h"
60
 
61
#include "nildummy.h"
62
 
63
/** Default maximum transmission unit.
64
 */
65
#define DEFAULT_MTU 1500
66
 
67
/** Network interface layer module global data.
68
 */
69
nildummy_globals_t  nildummy_globals;
70
 
4704 mejdrech 71
/** @name Message processing functions
72
 */
73
/*@{*/
74
 
4696 mejdrech 75
/** Processes IPC messages from the registered device driver modules in an infinite loop.
76
 *  @param iid The message identifier. Input parameter.
77
 *  @param icall The message parameters. Input/output parameter.
78
 */
79
void    nildummy_receiver( ipc_callid_t iid, ipc_call_t * icall );
80
 
81
/** Registers new device or updates the MTU of an existing one.
82
 *  Determines the device local hardware address.
83
 *  @param device_id The new device identifier. Input parameter.
84
 *  @param service The device driver service. Input parameter.
85
 *  @param mtu The device maximum transmission unit. Input parameter.
86
 *  @returns EOK on success.
87
 *  @returns EEXIST if the device with the different service exists.
88
 *  @returns ENOMEM if there is not enough memory left.
89
 *  @returns Other error codes as defined for the netif_bind_service() function.
90
 *  @returns Other error codes as defined for the netif_get_addr() function.
91
 */
92
int nildummy_device_message( device_id_t device_id, services_t service, size_t mtu );
93
 
94
/** Returns the device packet dimensions for sending.
95
 *  @param device_id The device identifier. Input parameter.
96
 *  @param addr_len The minimum reserved address length. Output parameter.
97
 *  @param prefix The minimum reserved prefix size. Output parameter.
98
 *  @param content The maximum content size. Output parameter.
99
 *  @param suffix The minimum reserved suffix size. Output parameter.
100
 *  @returns EOK on success.
101
 *  @returns EBADMEM if either one of the parameters is NULL.
102
 *  @returns ENOENT if there is no such device.
103
 */
104
int nildummy_packet_space_message( device_id_t device_id, size_t * addr_len, size_t * prefix, size_t * content, size_t * suffix );
105
 
106
/** Registers receiving module service.
107
 *  Passes received packets for this service.
108
 *  @param service The module service. Input parameter.
109
 *  @param phone The service phone. Input parameter.
110
 *  @returns EOK on success.
111
 *  @returns ENOENT if the service is not known.
112
 *  @returns ENOMEM if there is not enough memory left.
113
 */
114
int nildummy_register_message( services_t service, int phone );
115
 
116
/** Sends the packet queue.
117
 *  @param device_id The device identifier. Input parameter.
118
 *  @param packet The packet queue. Input parameter.
119
 *  @param sender The sending module service. Input parameter.
120
 *  @returns EOK on success.
121
 *  @returns ENOENT if there no such device.
122
 *  @returns EINVAL if the service parameter is not known.
123
 */
124
int nildummy_send_message( device_id_t device_id, packet_t packet, services_t sender );
125
 
126
/** Returns the device hardware address.
127
 *  @param device_id The device identifier. Input parameter.
128
 *  @param address The device hardware address. Output parameter.
129
 *  @returns EOK on success.
130
 *  @returns EBADMEM if the address parameter is NULL.
131
 *  @returns ENOENT if there no such device.
132
 */
133
int nildummy_addr_message( device_id_t device_id, measured_string_ref * address );
134
 
4704 mejdrech 135
/*@}*/
136
 
4696 mejdrech 137
DEVICE_MAP_IMPLEMENT( nildummy_devices, nildummy_device_t )
138
 
139
int nil_device_state_msg( int nil_phone, device_id_t device_id, int state ){
140
    fibril_rwlock_read_lock( & nildummy_globals.protos_lock );
141
    if( nildummy_globals.proto.phone ) il_device_state_msg( nildummy_globals.proto.phone, device_id, state, nildummy_globals.proto.service );
142
    fibril_rwlock_read_unlock( & nildummy_globals.protos_lock );
143
    return EOK;
144
}
145
 
146
int nil_initialize( int net_phone ){
147
    ERROR_DECLARE;
148
 
149
    fibril_rwlock_initialize( & nildummy_globals.devices_lock );
150
    fibril_rwlock_initialize( & nildummy_globals.protos_lock );
151
    fibril_rwlock_write_lock( & nildummy_globals.devices_lock );
152
    fibril_rwlock_write_lock( & nildummy_globals.protos_lock );
153
    nildummy_globals.net_phone = net_phone;
154
    nildummy_globals.proto.phone = 0;
155
    ERROR_PROPAGATE( nildummy_devices_initialize( & nildummy_globals.devices ));
156
    fibril_rwlock_write_unlock( & nildummy_globals.protos_lock );
157
    fibril_rwlock_write_unlock( & nildummy_globals.devices_lock );
158
    return EOK;
159
}
160
 
161
int nildummy_device_message( device_id_t device_id, services_t service, size_t mtu ){
162
    ERROR_DECLARE;
163
 
164
    nildummy_device_ref device;
165
    int                 index;
166
 
167
    fibril_rwlock_write_lock( & nildummy_globals.devices_lock );
168
    // an existing device?
169
    device = nildummy_devices_find( & nildummy_globals.devices, device_id );
170
    if( device ){
171
        if( device->service != service ){
172
            printf( "Device %d already exists\n", device->device_id );
173
            fibril_rwlock_write_unlock( & nildummy_globals.devices_lock );
174
            return EEXIST;
175
        }else{
176
            // update mtu
177
            device->mtu = mtu;
178
            printf( "Device %d already exists:\tMTU\t= %d\n", device->device_id, device->mtu );
179
            fibril_rwlock_write_unlock( & nildummy_globals.devices_lock );
180
            // notify the upper layer module
181
            fibril_rwlock_read_lock( & nildummy_globals.protos_lock );
182
            if( nildummy_globals.proto.phone ){
183
                il_mtu_changed_msg( nildummy_globals.proto.phone, device->device_id, device->mtu, nildummy_globals.proto.service );
184
            }
185
            fibril_rwlock_read_unlock( & nildummy_globals.protos_lock );
186
            return EOK;
187
        }
188
    }else{
189
        // create a new device
190
        device = ( nildummy_device_ref ) malloc( sizeof( nildummy_device_t ));
191
        if( ! device ) return ENOMEM;
192
        device->device_id = device_id;
193
        device->service = service;
194
        if( mtu > 0 ){
195
            device->mtu = mtu;
196
        }else{
197
            device->mtu = DEFAULT_MTU;
198
        }
199
        // bind the device driver
200
        device->phone = netif_bind_service( device->service, device->device_id, SERVICE_ETHERNET, nildummy_receiver );
201
        if( device->phone < 0 ){
202
            fibril_rwlock_write_unlock( & nildummy_globals.devices_lock );
203
            free( device );
204
            return device->phone;
205
        }
206
        // get hardware address
207
        if( ERROR_OCCURRED( netif_get_addr( device->phone, device->device_id, & device->addr, & device->addr_data ))){
208
            fibril_rwlock_write_unlock( & nildummy_globals.devices_lock );
209
            free( device );
210
            return ERROR_CODE;
211
        }
212
        // add to the cache
213
        index = nildummy_devices_add( & nildummy_globals.devices, device->device_id, device );
214
        if( index < 0 ){
215
            fibril_rwlock_write_unlock( & nildummy_globals.devices_lock );
216
            free( device->addr );
217
            free( device->addr_data );
218
            free( device );
219
            return index;
220
        }
221
        printf( "New device registered:\n\tid\t= %d\n\tservice\t= %d\n\tMTU\t= %d\n", device->device_id, device->service, device->mtu );
222
    }
223
    fibril_rwlock_write_unlock( & nildummy_globals.devices_lock );
224
    return EOK;
225
}
226
 
227
int nildummy_addr_message( device_id_t device_id, measured_string_ref * address ){
228
    nildummy_device_ref device;
229
 
230
    if( ! address ) return EBADMEM;
231
    fibril_rwlock_read_lock( & nildummy_globals.devices_lock );
232
    device = nildummy_devices_find( & nildummy_globals.devices, device_id );
233
    if( ! device ){
234
        fibril_rwlock_read_unlock( & nildummy_globals.devices_lock );
235
        return ENOENT;
236
    }
237
    * address = device->addr;
238
    fibril_rwlock_read_unlock( & nildummy_globals.devices_lock );
239
    return ( * address ) ? EOK : ENOENT;
240
}
241
 
242
int nildummy_packet_space_message( device_id_t device_id, size_t * addr_len, size_t * prefix, size_t * content, size_t * suffix ){
243
    nildummy_device_ref device;
244
 
245
    if( !( addr_len && prefix && content && suffix )) return EBADMEM;
246
    fibril_rwlock_read_lock( & nildummy_globals.devices_lock );
247
    device = nildummy_devices_find( & nildummy_globals.devices, device_id );
248
    if( ! device ){
249
        fibril_rwlock_read_unlock( & nildummy_globals.devices_lock );
250
        return ENOENT;
251
    }
252
    * content = device->mtu;
253
    fibril_rwlock_read_unlock( & nildummy_globals.devices_lock );
254
    * addr_len = 0;
255
    * prefix = 0;
256
    * suffix = 0;
257
    return EOK;
258
}
259
 
260
int nil_received_msg( int nil_phone, device_id_t device_id, packet_t packet, services_t target ){
261
    packet_t        next;
262
 
263
    fibril_rwlock_read_lock( & nildummy_globals.protos_lock );
264
    if( nildummy_globals.proto.phone ){
265
        do{
266
            next = pq_detach( packet );
267
            il_received_msg( nildummy_globals.proto.phone, device_id, packet, nildummy_globals.proto.service );
268
            packet = next;
269
        }while( packet );
270
    }
271
    fibril_rwlock_read_unlock( & nildummy_globals.protos_lock );
272
    return EOK;
273
}
274
 
275
int nildummy_register_message( services_t service, int phone ){
276
    fibril_rwlock_write_lock( & nildummy_globals.protos_lock );
277
    nildummy_globals.proto.service = service;
278
    nildummy_globals.proto.phone = phone;
279
    printf( "New protocol registered:\n\tservice\t= %d\n\tphone\t= %d\n", nildummy_globals.proto.service, nildummy_globals.proto.phone );
280
    fibril_rwlock_write_unlock( & nildummy_globals.protos_lock );
281
    return EOK;
282
}
283
 
284
int nildummy_send_message( device_id_t device_id, packet_t packet, services_t sender ){
285
    nildummy_device_ref     device;
286
 
287
    fibril_rwlock_read_lock( & nildummy_globals.devices_lock );
288
    device = nildummy_devices_find( & nildummy_globals.devices, device_id );
289
    if( ! device ){
290
        fibril_rwlock_read_unlock( & nildummy_globals.devices_lock );
291
        return ENOENT;
292
    }
293
    // send packet queue
294
    if( packet ){
295
        netif_send_msg( device->phone, device_id, packet, SERVICE_NILDUMMY );
296
    }
297
    fibril_rwlock_read_unlock( & nildummy_globals.devices_lock );
298
    return EOK;
299
}
300
 
301
int nil_message( ipc_callid_t callid, ipc_call_t * call, ipc_call_t * answer, int * answer_count ){
302
    ERROR_DECLARE;
303
 
304
    measured_string_ref address;
305
    packet_t            packet;
306
 
307
//  printf( "message %d - %d\n", IPC_GET_METHOD( * call ), NET_NIL_FIRST );
308
    * answer_count = 0;
309
    switch( IPC_GET_METHOD( * call )){
310
        case IPC_M_PHONE_HUNGUP:
311
            return EOK;
312
        case NET_NIL_DEVICE:
313
            return nildummy_device_message( IPC_GET_DEVICE( call ), IPC_GET_SERVICE( call ), IPC_GET_MTU( call ));
314
        case NET_NIL_SEND:
315
            ERROR_PROPAGATE( packet_translate( nildummy_globals.net_phone, & packet, IPC_GET_PACKET( call )));
316
            return nildummy_send_message( IPC_GET_DEVICE( call ), packet, IPC_GET_SERVICE( call ));
317
        case NET_NIL_PACKET_SPACE:
318
            ERROR_PROPAGATE( nildummy_packet_space_message( IPC_GET_DEVICE( call ), IPC_SET_ADDR( answer ), IPC_SET_PREFIX( answer ), IPC_SET_CONTENT( answer ), IPC_SET_SUFFIX( answer )));
319
            * answer_count = 4;
320
            return EOK;
321
        case NET_NIL_ADDR:
322
            ERROR_PROPAGATE( nildummy_addr_message( IPC_GET_DEVICE( call ), & address ));
323
            return measured_strings_reply( address, 1 );
324
        case IPC_M_CONNECT_TO_ME:
325
            return nildummy_register_message( NIL_GET_PROTO( call ), IPC_GET_PHONE( call ));
326
    }
327
    return ENOTSUP;
328
}
329
 
330
void nildummy_receiver( ipc_callid_t iid, ipc_call_t * icall ){
331
    ERROR_DECLARE;
332
 
333
    packet_t        packet;
334
 
335
    while( true ){
336
//      printf( "message %d - %d\n", IPC_GET_METHOD( * icall ), NET_NIL_FIRST );
337
        switch( IPC_GET_METHOD( * icall )){
338
            case NET_NIL_DEVICE_STATE:
339
                ERROR_CODE = nil_device_state_msg( 0, IPC_GET_DEVICE( icall ), IPC_GET_STATE( icall ));
4708 mejdrech 340
                ipc_answer_0( iid, ( ipcarg_t ) ERROR_CODE );
4696 mejdrech 341
                break;
342
            case NET_NIL_RECEIVED:
343
                if( ! ERROR_OCCURRED( packet_translate( nildummy_globals.net_phone, & packet, IPC_GET_PACKET( icall )))){
344
                    ERROR_CODE = nil_received_msg( 0, IPC_GET_DEVICE( icall ), packet, 0 );
345
                }
346
                ipc_answer_0( iid, ( ipcarg_t ) ERROR_CODE );
347
                break;
348
            default:
349
                ipc_answer_0( iid, ( ipcarg_t ) ENOTSUP );
350
        }
351
        iid = async_get_call( icall );
352
    }
353
}
354
 
355
/** @}
356
 */