summaryrefslogtreecommitdiffstats
path: root/net/irda/irlan/irlan_provider.c
blob: 8b61cf0d8a69817cc70c5dfdb71c921efb9f3a90 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
/*********************************************************************
 *
 * Filename:      irlan_provider.c
 * Version:       0.9
 * Description:   IrDA LAN Access Protocol Implementation
 * Status:        Experimental.
 * Author:        Dag Brattli <dagb@cs.uit.no>
 * Created at:    Sun Aug 31 20:14:37 1997
 * Modified at:   Sat Oct 30 12:52:10 1999
 * Modified by:   Dag Brattli <dagb@cs.uit.no>
 * Sources:       skeleton.c by Donald Becker <becker@CESDIS.gsfc.nasa.gov>
 *                slip.c by Laurence Culhane,   <loz@holmes.demon.co.uk>
 *                          Fred N. van Kempen, <waltje@uwalt.nl.mugnet.org>
 *
 *     Copyright (c) 1998-1999 Dag Brattli <dagb@cs.uit.no>,
 *     All Rights Reserved.
 *
 *     This program is free software; you can redistribute it and/or
 *     modify it under the terms of the GNU General Public License as
 *     published by the Free Software Foundation; either version 2 of
 *     the License, or (at your option) any later version.
 *
 *     Neither Dag Brattli nor University of Tromsø admit liability nor
 *     provide warranty for any of this software. This material is
 *     provided "AS-IS" and at no charge.
 *
 ********************************************************************/

#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/errno.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/init.h>
#include <linux/random.h>
#include <linux/bitops.h>
#include <linux/slab.h>

#include <asm/system.h>
#include <asm/byteorder.h>

#include <net/irda/irda.h>
#include <net/irda/irttp.h>
#include <net/irda/irlmp.h>
#include <net/irda/irias_object.h>
#include <net/irda/iriap.h>
#include <net/irda/timer.h>

#include <net/irda/irlan_common.h>
#include <net/irda/irlan_eth.h>
#include <net/irda/irlan_event.h>
#include <net/irda/irlan_provider.h>
#include <net/irda/irlan_filter.h>
#include <net/irda/irlan_client.h>

static void irlan_provider_connect_indication(void *instance, void *sap,
					      struct qos_info *qos,
					      __u32 max_sdu_size,
					      __u8 max_header_size,
					      struct sk_buff *skb);

/*
 * Function irlan_provider_control_data_indication (handle, skb)
 *
 *    This function gets the data that is received on the control channel
 *
 */
static int irlan_provider_data_indication(void *instance, void *sap,
					  struct sk_buff *skb)
{
	struct irlan_cb *self;
	__u8 code;

	IRDA_DEBUG(4, "%s()\n", __func__ );

	self = instance;

	IRDA_ASSERT(self != NULL, return -1;);
	IRDA_ASSERT(self->magic == IRLAN_MAGIC, return -1;);

	IRDA_ASSERT(skb != NULL, return -1;);

	code = skb->data[0];
	switch(code) {
	case CMD_GET_PROVIDER_INFO:
		IRDA_DEBUG(4, "Got GET_PROVIDER_INFO command!\n");
		irlan_do_provider_event(self, IRLAN_GET_INFO_CMD, skb);
		break;

	case CMD_GET_MEDIA_CHAR:
		IRDA_DEBUG(4, "Got GET_MEDIA_CHAR command!\n");
		irlan_do_provider_event(self, IRLAN_GET_MEDIA_CMD, skb);
		break;
	case CMD_OPEN_DATA_CHANNEL:
		IRDA_DEBUG(4, "Got OPEN_DATA_CHANNEL command!\n");
		irlan_do_provider_event(self, IRLAN_OPEN_DATA_CMD, skb);
		break;
	case CMD_FILTER_OPERATION:
		IRDA_DEBUG(4, "Got FILTER_OPERATION command!\n");
		irlan_do_provider_event(self, IRLAN_FILTER_CONFIG_CMD, skb);
		break;
	case CMD_RECONNECT_DATA_CHAN:
		IRDA_DEBUG(2, "%s(), Got RECONNECT_DATA_CHAN command\n", __func__ );
		IRDA_DEBUG(2, "%s(), NOT IMPLEMENTED\n", __func__ );
		break;
	case CMD_CLOSE_DATA_CHAN:
		IRDA_DEBUG(2, "Got CLOSE_DATA_CHAN command!\n");
		IRDA_DEBUG(2, "%s(), NOT IMPLEMENTED\n", __func__ );
		break;
	default:
		IRDA_DEBUG(2, "%s(), Unknown command!\n", __func__ );
		break;
	}
	return 0;
}

/*
 * Function irlan_provider_connect_indication (handle, skb, priv)
 *
 *    Got connection from peer IrLAN client
 *
 */
static void irlan_provider_connect_indication(void *instance, void *sap,
					      struct qos_info *qos,
					      __u32 max_sdu_size,
					      __u8 max_header_size,
					      struct sk_buff *skb)
{
	struct irlan_cb *self;
	struct tsap_cb *tsap;

	IRDA_DEBUG(0, "%s()\n", __func__ );

	self = instance;
	tsap = sap;

	IRDA_ASSERT(self != NULL, return;);
	IRDA_ASSERT(self->magic == IRLAN_MAGIC, return;);

	IRDA_ASSERT(tsap == self->provider.tsap_ctrl,return;);
	IRDA_ASSERT(self->provider.state == IRLAN_IDLE, return;);

	self->provider.max_sdu_size = max_sdu_size;
	self->provider.max_header_size = max_header_size;

	irlan_do_provider_event(self, IRLAN_CONNECT_INDICATION, NULL);

	/*
	 * If we are in peer mode, the client may not have got the discovery
	 * indication it needs to make progress. If the client is still in
	 * IDLE state, we must kick it.
	 */
	if ((self->provider.access_type == ACCESS_PEER) &&
	    (self->client.state == IRLAN_IDLE))
	{
		irlan_client_wakeup(self, self->saddr, self->daddr);
	}
}

/*
 * Function irlan_provider_connect_response (handle)
 *
 *    Accept incoming connection
 *
 */
void irlan_provider_connect_response(struct irlan_cb *self,
				     struct tsap_cb *tsap)
{
	IRDA_ASSERT(self != NULL, return;);
	IRDA_ASSERT(self->magic == IRLAN_MAGIC, return;);

	/* Just accept */
	irttp_connect_response(tsap, IRLAN_MTU, NULL);
}

static void irlan_provider_disconnect_indication(void *instance, void *sap,
						 LM_REASON reason,
						 struct sk_buff *userdata)
{
	struct irlan_cb *self;
	struct tsap_cb *tsap;

	IRDA_DEBUG(4, "%s(), reason=%d\n", __func__ , reason);

	self = instance;
	tsap = sap;

	IRDA_ASSERT(self != NULL, return;);
	IRDA_ASSERT(self->magic == IRLAN_MAGIC, return;);
	IRDA_ASSERT(tsap != NULL, return;);
	IRDA_ASSERT(tsap->magic == TTP_TSAP_MAGIC, return;);

	IRDA_ASSERT(tsap == self->provider.tsap_ctrl, return;);

	irlan_do_provider_event(self, IRLAN_LMP_DISCONNECT, NULL);
}

/*
 * Function irlan_parse_open_data_cmd (self, skb)
 *
 *
 *
 */
int irlan_parse_open_data_cmd(struct irlan_cb *self, struct sk_buff *skb)
{
	int ret;

	ret = irlan_provider_parse_command(self, CMD_OPEN_DATA_CHANNEL, skb);

	/* Open data channel */
	irlan_open_data_tsap(self);

	return ret;
}

/*
 * Function parse_command (skb)
 *
 *    Extract all parameters from received buffer, then feed them to
 *    check_params for parsing
 *
 */
int irlan_provider_parse_command(struct irlan_cb *self, int cmd,
				 struct sk_buff *skb)
{
	__u8 *frame;
	__u8 *ptr;
	int count;
	__u16 val_len;
	int i;
	char *name;
	char *value;
	int ret = RSP_SUCCESS;

	IRDA_ASSERT(skb != NULL, return -RSP_PROTOCOL_ERROR;);

	IRDA_DEBUG(4, "%s(), skb->len=%d\n", __func__ , (int)skb->len);

	IRDA_ASSERT(self != NULL, return -RSP_PROTOCOL_ERROR;);
	IRDA_ASSERT(self->magic == IRLAN_MAGIC, return -RSP_PROTOCOL_ERROR;);

	if (!skb)
		return -RSP_PROTOCOL_ERROR;

	frame = skb->data;

	name = kmalloc(255, GFP_ATOMIC);
	if (!name)
		return -RSP_INSUFFICIENT_RESOURCES;
	value = kmalloc(1016, GFP_ATOMIC);
	if (!value) {
		kfree(name);
		return -RSP_INSUFFICIENT_RESOURCES;
	}

	/* How many parameters? */
	count = frame[1];

	IRDA_DEBUG(4, "Got %d parameters\n", count);

	ptr = frame+2;

	/* For all parameters */
	for (i=0; i<count;i++) {
		ret = irlan_extract_param(ptr, name, value, &val_len);
		if (ret < 0) {
			IRDA_DEBUG(2, "%s(), IrLAN, Error!\n", __func__ );
			break;
		}
		ptr+=ret;
		ret = RSP_SUCCESS;
		irlan_check_command_param(self, name, value);
	}
	/* Cleanup */
	kfree(name);
	kfree(value);

	return ret;
}

/*
 * Function irlan_provider_send_reply (self, info)
 *
 *    Send reply to query to peer IrLAN layer
 *
 */
void irlan_provider_send_reply(struct irlan_cb *self, int command,
			       int ret_code)
{
	struct sk_buff *skb;

	IRDA_DEBUG(4, "%s()\n", __func__ );

	IRDA_ASSERT(self != NULL, return;);
	IRDA_ASSERT(self->magic == IRLAN_MAGIC, return;);

	skb = alloc_skb(IRLAN_MAX_HEADER + IRLAN_CMD_HEADER +
			/* Bigger param length comes from CMD_GET_MEDIA_CHAR */
			IRLAN_STRING_PARAMETER_LEN("FILTER_TYPE", "DIRECTED") +
			IRLAN_STRING_PARAMETER_LEN("FILTER_TYPE", "BORADCAST") +
			IRLAN_STRING_PARAMETER_LEN("FILTER_TYPE", "MULTICAST") +
			IRLAN_STRING_PARAMETER_LEN("ACCESS_TYPE", "HOSTED"),
			GFP_ATOMIC);

	if (!skb)
		return;

	/* Reserve space for TTP, LMP, and LAP header */
	skb_reserve(skb, self->provider.max_header_size);
	skb_put(skb, 2);

	switch (command) {
	case CMD_GET_PROVIDER_INFO:
		skb->data[0] = 0x00; /* Success */
		skb->data[1] = 0x02; /* 2 parameters */
		switch (self->media) {
		case MEDIA_802_3:
			irlan_insert_string_param(skb, "MEDIA", "802.3");
			break;
		case MEDIA_802_5:
			irlan_insert_string_param(skb, "MEDIA", "802.5");
			break;
		default:
			IRDA_DEBUG(2, "%s(), unknown media type!\n", __func__ );
			break;
		}
		irlan_insert_short_param(skb, "IRLAN_VER", 0x0101);
		break;

	case CMD_GET_MEDIA_CHAR:
		skb->data[0] = 0x00; /* Success */
		skb->data[1] = 0x05; /* 5 parameters */
		irlan_insert_string_param(skb, "FILTER_TYPE", "DIRECTED");
		irlan_insert_string_param(skb, "FILTER_TYPE", "BROADCAST");
		irlan_insert_string_param(skb, "FILTER_TYPE", "MULTICAST");

		switch (self->provider.access_type) {
		case ACCESS_DIRECT:
			irlan_insert_string_param(skb, "ACCESS_TYPE", "DIRECT");
			break;
		case ACCESS_PEER:
			irlan_insert_string_param(skb, "ACCESS_TYPE", "PEER");
			break;
		case ACCESS_HOSTED:
			irlan_insert_string_param(skb, "ACCESS_TYPE", "HOSTED");
			break;
		default:
			IRDA_DEBUG(2, "%s(), Unknown access type\n", __func__ );
			break;
		}
		irlan_insert_short_param(skb, "MAX_FRAME", 0x05ee);
		break;
	case CMD_OPEN_DATA_CHANNEL:
		skb->data[0] = 0x00; /* Success */
		if (self->provider.send_arb_val) {
			skb->data[1] = 0x03; /* 3 parameters */
			irlan_insert_short_param(skb, "CON_ARB",
						 self->provider.send_arb_val);
		} else
			skb->data[1] = 0x02; /* 2 parameters */
		irlan_insert_byte_param(skb, "DATA_CHAN", self->stsap_sel_data);
		irlan_insert_string_param(skb, "RECONNECT_KEY", "LINUX RULES!");
		break;
	case CMD_FILTER_OPERATION:
		irlan_filter_request(self, skb);
		break;
	default:
		IRDA_DEBUG(2, "%s(), Unknown command!\n", __func__ );
		break;
	}

	irttp_data_request(self->provider.tsap_ctrl, skb);
}

/*
 * Function irlan_provider_register(void)
 *
 *    Register provider support so we can accept incoming connections.
 *
 */
int irlan_provider_open_ctrl_tsap(struct irlan_cb *self)
{
	struct tsap_cb *tsap;
	notify_t notify;

	IRDA_DEBUG(4, "%s()\n", __func__ );

	IRDA_ASSERT(self != NULL, return -1;);
	IRDA_ASSERT(self->magic == IRLAN_MAGIC, return -1;);

	/* Check if already open */
	if (self->provider.tsap_ctrl)
		return -1;

	/*
	 *  First register well known control TSAP
	 */
	irda_notify_init(&notify);
	notify.data_indication       = irlan_provider_data_indication;
	notify.connect_indication    = irlan_provider_connect_indication;
	notify.disconnect_indication = irlan_provider_disconnect_indication;
	notify.instance = self;
	strlcpy(notify.name, "IrLAN ctrl (p)", sizeof(notify.name));

	tsap = irttp_open_tsap(LSAP_ANY, 1, &notify);
	if (!tsap) {
		IRDA_DEBUG(2, "%s(), Got no tsap!\n", __func__ );
		return -1;
	}
	self->provider.tsap_ctrl = tsap;

	/* Register with LM-IAS */
	irlan_ias_register(self, tsap->stsap_sel);

	return 0;
}