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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*********************************************************************
YOSHIFUJI Hideaki6819bc22007-02-09 23:24:53 +09002 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07003 * Filename: irlan_provider.c
4 * Version: 0.9
5 * Description: IrDA LAN Access Protocol Implementation
6 * Status: Experimental.
7 * Author: Dag Brattli <dagb@cs.uit.no>
8 * Created at: Sun Aug 31 20:14:37 1997
9 * Modified at: Sat Oct 30 12:52:10 1999
10 * Modified by: Dag Brattli <dagb@cs.uit.no>
11 * Sources: skeleton.c by Donald Becker <becker@CESDIS.gsfc.nasa.gov>
12 * slip.c by Laurence Culhane, <loz@holmes.demon.co.uk>
13 * Fred N. van Kempen, <waltje@uwalt.nl.mugnet.org>
YOSHIFUJI Hideaki6819bc22007-02-09 23:24:53 +090014 *
15 * Copyright (c) 1998-1999 Dag Brattli <dagb@cs.uit.no>,
Linus Torvalds1da177e2005-04-16 15:20:36 -070016 * All Rights Reserved.
YOSHIFUJI Hideaki6819bc22007-02-09 23:24:53 +090017 *
18 * This program is free software; you can redistribute it and/or
19 * modify it under the terms of the GNU General Public License as
20 * published by the Free Software Foundation; either version 2 of
Linus Torvalds1da177e2005-04-16 15:20:36 -070021 * the License, or (at your option) any later version.
22 *
Jan Engelhardt96de0e22007-10-19 23:21:04 +020023 * Neither Dag Brattli nor University of Tromsø admit liability nor
YOSHIFUJI Hideaki6819bc22007-02-09 23:24:53 +090024 * provide warranty for any of this software. This material is
Linus Torvalds1da177e2005-04-16 15:20:36 -070025 * provided "AS-IS" and at no charge.
26 *
27 ********************************************************************/
28
29#include <linux/kernel.h>
30#include <linux/string.h>
31#include <linux/errno.h>
32#include <linux/netdevice.h>
33#include <linux/etherdevice.h>
34#include <linux/init.h>
35#include <linux/random.h>
36#include <linux/bitops.h>
37
38#include <asm/system.h>
39#include <asm/byteorder.h>
40
41#include <net/irda/irda.h>
42#include <net/irda/irttp.h>
43#include <net/irda/irlmp.h>
44#include <net/irda/irias_object.h>
45#include <net/irda/iriap.h>
46#include <net/irda/timer.h>
47
48#include <net/irda/irlan_common.h>
49#include <net/irda/irlan_eth.h>
50#include <net/irda/irlan_event.h>
51#include <net/irda/irlan_provider.h>
52#include <net/irda/irlan_filter.h>
53#include <net/irda/irlan_client.h>
54
YOSHIFUJI Hideaki6819bc22007-02-09 23:24:53 +090055static void irlan_provider_connect_indication(void *instance, void *sap,
56 struct qos_info *qos,
Linus Torvalds1da177e2005-04-16 15:20:36 -070057 __u32 max_sdu_size,
58 __u8 max_header_size,
59 struct sk_buff *skb);
60
61/*
62 * Function irlan_provider_control_data_indication (handle, skb)
63 *
64 * This function gets the data that is received on the control channel
65 *
66 */
YOSHIFUJI Hideaki6819bc22007-02-09 23:24:53 +090067static int irlan_provider_data_indication(void *instance, void *sap,
68 struct sk_buff *skb)
Linus Torvalds1da177e2005-04-16 15:20:36 -070069{
70 struct irlan_cb *self;
71 __u8 code;
YOSHIFUJI Hideaki6819bc22007-02-09 23:24:53 +090072
Harvey Harrison0dc47872008-03-05 20:47:47 -080073 IRDA_DEBUG(4, "%s()\n", __func__ );
YOSHIFUJI Hideaki6819bc22007-02-09 23:24:53 +090074
Linus Torvalds1da177e2005-04-16 15:20:36 -070075 self = (struct irlan_cb *) instance;
76
77 IRDA_ASSERT(self != NULL, return -1;);
78 IRDA_ASSERT(self->magic == IRLAN_MAGIC, return -1;);
79
80 IRDA_ASSERT(skb != NULL, return -1;);
81
82 code = skb->data[0];
83 switch(code) {
84 case CMD_GET_PROVIDER_INFO:
85 IRDA_DEBUG(4, "Got GET_PROVIDER_INFO command!\n");
YOSHIFUJI Hideaki6819bc22007-02-09 23:24:53 +090086 irlan_do_provider_event(self, IRLAN_GET_INFO_CMD, skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -070087 break;
88
89 case CMD_GET_MEDIA_CHAR:
90 IRDA_DEBUG(4, "Got GET_MEDIA_CHAR command!\n");
YOSHIFUJI Hideaki6819bc22007-02-09 23:24:53 +090091 irlan_do_provider_event(self, IRLAN_GET_MEDIA_CMD, skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -070092 break;
93 case CMD_OPEN_DATA_CHANNEL:
94 IRDA_DEBUG(4, "Got OPEN_DATA_CHANNEL command!\n");
YOSHIFUJI Hideaki6819bc22007-02-09 23:24:53 +090095 irlan_do_provider_event(self, IRLAN_OPEN_DATA_CMD, skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -070096 break;
97 case CMD_FILTER_OPERATION:
98 IRDA_DEBUG(4, "Got FILTER_OPERATION command!\n");
99 irlan_do_provider_event(self, IRLAN_FILTER_CONFIG_CMD, skb);
100 break;
101 case CMD_RECONNECT_DATA_CHAN:
Harvey Harrison0dc47872008-03-05 20:47:47 -0800102 IRDA_DEBUG(2, "%s(), Got RECONNECT_DATA_CHAN command\n", __func__ );
103 IRDA_DEBUG(2, "%s(), NOT IMPLEMENTED\n", __func__ );
Linus Torvalds1da177e2005-04-16 15:20:36 -0700104 break;
105 case CMD_CLOSE_DATA_CHAN:
106 IRDA_DEBUG(2, "Got CLOSE_DATA_CHAN command!\n");
Harvey Harrison0dc47872008-03-05 20:47:47 -0800107 IRDA_DEBUG(2, "%s(), NOT IMPLEMENTED\n", __func__ );
Linus Torvalds1da177e2005-04-16 15:20:36 -0700108 break;
109 default:
Harvey Harrison0dc47872008-03-05 20:47:47 -0800110 IRDA_DEBUG(2, "%s(), Unknown command!\n", __func__ );
Linus Torvalds1da177e2005-04-16 15:20:36 -0700111 break;
112 }
113 return 0;
114}
115
116/*
117 * Function irlan_provider_connect_indication (handle, skb, priv)
118 *
119 * Got connection from peer IrLAN client
120 *
121 */
YOSHIFUJI Hideaki6819bc22007-02-09 23:24:53 +0900122static void irlan_provider_connect_indication(void *instance, void *sap,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700123 struct qos_info *qos,
YOSHIFUJI Hideaki6819bc22007-02-09 23:24:53 +0900124 __u32 max_sdu_size,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700125 __u8 max_header_size,
126 struct sk_buff *skb)
127{
128 struct irlan_cb *self;
129 struct tsap_cb *tsap;
130 __u32 saddr, daddr;
131
Harvey Harrison0dc47872008-03-05 20:47:47 -0800132 IRDA_DEBUG(0, "%s()\n", __func__ );
YOSHIFUJI Hideaki6819bc22007-02-09 23:24:53 +0900133
Linus Torvalds1da177e2005-04-16 15:20:36 -0700134 self = (struct irlan_cb *) instance;
135 tsap = (struct tsap_cb *) sap;
YOSHIFUJI Hideaki6819bc22007-02-09 23:24:53 +0900136
Linus Torvalds1da177e2005-04-16 15:20:36 -0700137 IRDA_ASSERT(self != NULL, return;);
138 IRDA_ASSERT(self->magic == IRLAN_MAGIC, return;);
YOSHIFUJI Hideaki6819bc22007-02-09 23:24:53 +0900139
Linus Torvalds1da177e2005-04-16 15:20:36 -0700140 IRDA_ASSERT(tsap == self->provider.tsap_ctrl,return;);
141 IRDA_ASSERT(self->provider.state == IRLAN_IDLE, return;);
142
143 daddr = irttp_get_daddr(tsap);
144 saddr = irttp_get_saddr(tsap);
145 self->provider.max_sdu_size = max_sdu_size;
146 self->provider.max_header_size = max_header_size;
147
148 irlan_do_provider_event(self, IRLAN_CONNECT_INDICATION, NULL);
149
YOSHIFUJI Hideaki6819bc22007-02-09 23:24:53 +0900150 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700151 * If we are in peer mode, the client may not have got the discovery
YOSHIFUJI Hideaki6819bc22007-02-09 23:24:53 +0900152 * indication it needs to make progress. If the client is still in
153 * IDLE state, we must kick it.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700154 */
YOSHIFUJI Hideaki6819bc22007-02-09 23:24:53 +0900155 if ((self->provider.access_type == ACCESS_PEER) &&
156 (self->client.state == IRLAN_IDLE))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700157 {
158 irlan_client_wakeup(self, self->saddr, self->daddr);
159 }
160}
161
162/*
163 * Function irlan_provider_connect_response (handle)
164 *
165 * Accept incoming connection
166 *
167 */
168void irlan_provider_connect_response(struct irlan_cb *self,
169 struct tsap_cb *tsap)
170{
171 IRDA_ASSERT(self != NULL, return;);
172 IRDA_ASSERT(self->magic == IRLAN_MAGIC, return;);
173
174 /* Just accept */
175 irttp_connect_response(tsap, IRLAN_MTU, NULL);
176}
177
YOSHIFUJI Hideaki6819bc22007-02-09 23:24:53 +0900178static void irlan_provider_disconnect_indication(void *instance, void *sap,
179 LM_REASON reason,
180 struct sk_buff *userdata)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700181{
182 struct irlan_cb *self;
183 struct tsap_cb *tsap;
184
Harvey Harrison0dc47872008-03-05 20:47:47 -0800185 IRDA_DEBUG(4, "%s(), reason=%d\n", __func__ , reason);
YOSHIFUJI Hideaki6819bc22007-02-09 23:24:53 +0900186
Linus Torvalds1da177e2005-04-16 15:20:36 -0700187 self = (struct irlan_cb *) instance;
188 tsap = (struct tsap_cb *) sap;
189
190 IRDA_ASSERT(self != NULL, return;);
YOSHIFUJI Hideaki6819bc22007-02-09 23:24:53 +0900191 IRDA_ASSERT(self->magic == IRLAN_MAGIC, return;);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700192 IRDA_ASSERT(tsap != NULL, return;);
193 IRDA_ASSERT(tsap->magic == TTP_TSAP_MAGIC, return;);
YOSHIFUJI Hideaki6819bc22007-02-09 23:24:53 +0900194
Linus Torvalds1da177e2005-04-16 15:20:36 -0700195 IRDA_ASSERT(tsap == self->provider.tsap_ctrl, return;);
YOSHIFUJI Hideaki6819bc22007-02-09 23:24:53 +0900196
Linus Torvalds1da177e2005-04-16 15:20:36 -0700197 irlan_do_provider_event(self, IRLAN_LMP_DISCONNECT, NULL);
198}
199
200/*
201 * Function irlan_parse_open_data_cmd (self, skb)
202 *
YOSHIFUJI Hideaki6819bc22007-02-09 23:24:53 +0900203 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700204 *
205 */
206int irlan_parse_open_data_cmd(struct irlan_cb *self, struct sk_buff *skb)
207{
208 int ret;
YOSHIFUJI Hideaki6819bc22007-02-09 23:24:53 +0900209
Linus Torvalds1da177e2005-04-16 15:20:36 -0700210 ret = irlan_provider_parse_command(self, CMD_OPEN_DATA_CHANNEL, skb);
211
212 /* Open data channel */
213 irlan_open_data_tsap(self);
214
215 return ret;
216}
217
218/*
219 * Function parse_command (skb)
220 *
YOSHIFUJI Hideaki6819bc22007-02-09 23:24:53 +0900221 * Extract all parameters from received buffer, then feed them to
Linus Torvalds1da177e2005-04-16 15:20:36 -0700222 * check_params for parsing
223 *
224 */
225int irlan_provider_parse_command(struct irlan_cb *self, int cmd,
YOSHIFUJI Hideaki6819bc22007-02-09 23:24:53 +0900226 struct sk_buff *skb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700227{
228 __u8 *frame;
229 __u8 *ptr;
230 int count;
231 __u16 val_len;
232 int i;
233 char *name;
YOSHIFUJI Hideaki6819bc22007-02-09 23:24:53 +0900234 char *value;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700235 int ret = RSP_SUCCESS;
YOSHIFUJI Hideaki6819bc22007-02-09 23:24:53 +0900236
Linus Torvalds1da177e2005-04-16 15:20:36 -0700237 IRDA_ASSERT(skb != NULL, return -RSP_PROTOCOL_ERROR;);
YOSHIFUJI Hideaki6819bc22007-02-09 23:24:53 +0900238
Harvey Harrison0dc47872008-03-05 20:47:47 -0800239 IRDA_DEBUG(4, "%s(), skb->len=%d\n", __func__ , (int)skb->len);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700240
241 IRDA_ASSERT(self != NULL, return -RSP_PROTOCOL_ERROR;);
242 IRDA_ASSERT(self->magic == IRLAN_MAGIC, return -RSP_PROTOCOL_ERROR;);
YOSHIFUJI Hideaki6819bc22007-02-09 23:24:53 +0900243
Linus Torvalds1da177e2005-04-16 15:20:36 -0700244 if (!skb)
245 return -RSP_PROTOCOL_ERROR;
246
247 frame = skb->data;
248
249 name = kmalloc(255, GFP_ATOMIC);
250 if (!name)
251 return -RSP_INSUFFICIENT_RESOURCES;
252 value = kmalloc(1016, GFP_ATOMIC);
253 if (!value) {
254 kfree(name);
255 return -RSP_INSUFFICIENT_RESOURCES;
256 }
257
258 /* How many parameters? */
259 count = frame[1];
260
261 IRDA_DEBUG(4, "Got %d parameters\n", count);
YOSHIFUJI Hideaki6819bc22007-02-09 23:24:53 +0900262
Linus Torvalds1da177e2005-04-16 15:20:36 -0700263 ptr = frame+2;
YOSHIFUJI Hideaki6819bc22007-02-09 23:24:53 +0900264
Linus Torvalds1da177e2005-04-16 15:20:36 -0700265 /* For all parameters */
YOSHIFUJI Hideaki6819bc22007-02-09 23:24:53 +0900266 for (i=0; i<count;i++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700267 ret = irlan_extract_param(ptr, name, value, &val_len);
268 if (ret < 0) {
Harvey Harrison0dc47872008-03-05 20:47:47 -0800269 IRDA_DEBUG(2, "%s(), IrLAN, Error!\n", __func__ );
Linus Torvalds1da177e2005-04-16 15:20:36 -0700270 break;
271 }
272 ptr+=ret;
273 ret = RSP_SUCCESS;
274 irlan_check_command_param(self, name, value);
275 }
276 /* Cleanup */
277 kfree(name);
278 kfree(value);
279
280 return ret;
281}
282
283/*
284 * Function irlan_provider_send_reply (self, info)
285 *
286 * Send reply to query to peer IrLAN layer
287 *
288 */
YOSHIFUJI Hideaki6819bc22007-02-09 23:24:53 +0900289void irlan_provider_send_reply(struct irlan_cb *self, int command,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700290 int ret_code)
291{
292 struct sk_buff *skb;
293
Harvey Harrison0dc47872008-03-05 20:47:47 -0800294 IRDA_DEBUG(4, "%s()\n", __func__ );
Linus Torvalds1da177e2005-04-16 15:20:36 -0700295
296 IRDA_ASSERT(self != NULL, return;);
297 IRDA_ASSERT(self->magic == IRLAN_MAGIC, return;);
298
Samuel Ortiz1b0fee72006-09-27 20:06:44 -0700299 skb = alloc_skb(IRLAN_MAX_HEADER + IRLAN_CMD_HEADER +
300 /* Bigger param length comes from CMD_GET_MEDIA_CHAR */
301 IRLAN_STRING_PARAMETER_LEN("FILTER_TYPE", "DIRECTED") +
302 IRLAN_STRING_PARAMETER_LEN("FILTER_TYPE", "BORADCAST") +
303 IRLAN_STRING_PARAMETER_LEN("FILTER_TYPE", "MULTICAST") +
304 IRLAN_STRING_PARAMETER_LEN("ACCESS_TYPE", "HOSTED"),
305 GFP_ATOMIC);
306
Linus Torvalds1da177e2005-04-16 15:20:36 -0700307 if (!skb)
308 return;
309
310 /* Reserve space for TTP, LMP, and LAP header */
311 skb_reserve(skb, self->provider.max_header_size);
312 skb_put(skb, 2);
YOSHIFUJI Hideaki6819bc22007-02-09 23:24:53 +0900313
Linus Torvalds1da177e2005-04-16 15:20:36 -0700314 switch (command) {
315 case CMD_GET_PROVIDER_INFO:
316 skb->data[0] = 0x00; /* Success */
317 skb->data[1] = 0x02; /* 2 parameters */
318 switch (self->media) {
319 case MEDIA_802_3:
320 irlan_insert_string_param(skb, "MEDIA", "802.3");
321 break;
322 case MEDIA_802_5:
323 irlan_insert_string_param(skb, "MEDIA", "802.5");
324 break;
325 default:
Harvey Harrison0dc47872008-03-05 20:47:47 -0800326 IRDA_DEBUG(2, "%s(), unknown media type!\n", __func__ );
Linus Torvalds1da177e2005-04-16 15:20:36 -0700327 break;
328 }
329 irlan_insert_short_param(skb, "IRLAN_VER", 0x0101);
330 break;
331
332 case CMD_GET_MEDIA_CHAR:
333 skb->data[0] = 0x00; /* Success */
334 skb->data[1] = 0x05; /* 5 parameters */
335 irlan_insert_string_param(skb, "FILTER_TYPE", "DIRECTED");
336 irlan_insert_string_param(skb, "FILTER_TYPE", "BROADCAST");
337 irlan_insert_string_param(skb, "FILTER_TYPE", "MULTICAST");
338
339 switch (self->provider.access_type) {
340 case ACCESS_DIRECT:
341 irlan_insert_string_param(skb, "ACCESS_TYPE", "DIRECT");
342 break;
343 case ACCESS_PEER:
344 irlan_insert_string_param(skb, "ACCESS_TYPE", "PEER");
345 break;
346 case ACCESS_HOSTED:
347 irlan_insert_string_param(skb, "ACCESS_TYPE", "HOSTED");
348 break;
349 default:
Harvey Harrison0dc47872008-03-05 20:47:47 -0800350 IRDA_DEBUG(2, "%s(), Unknown access type\n", __func__ );
Linus Torvalds1da177e2005-04-16 15:20:36 -0700351 break;
352 }
353 irlan_insert_short_param(skb, "MAX_FRAME", 0x05ee);
354 break;
355 case CMD_OPEN_DATA_CHANNEL:
356 skb->data[0] = 0x00; /* Success */
357 if (self->provider.send_arb_val) {
358 skb->data[1] = 0x03; /* 3 parameters */
YOSHIFUJI Hideaki6819bc22007-02-09 23:24:53 +0900359 irlan_insert_short_param(skb, "CON_ARB",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700360 self->provider.send_arb_val);
361 } else
362 skb->data[1] = 0x02; /* 2 parameters */
363 irlan_insert_byte_param(skb, "DATA_CHAN", self->stsap_sel_data);
Samuel Ortiz1b0fee72006-09-27 20:06:44 -0700364 irlan_insert_string_param(skb, "RECONNECT_KEY", "LINUX RULES!");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700365 break;
366 case CMD_FILTER_OPERATION:
367 irlan_filter_request(self, skb);
368 break;
369 default:
Harvey Harrison0dc47872008-03-05 20:47:47 -0800370 IRDA_DEBUG(2, "%s(), Unknown command!\n", __func__ );
Linus Torvalds1da177e2005-04-16 15:20:36 -0700371 break;
372 }
373
374 irttp_data_request(self->provider.tsap_ctrl, skb);
375}
376
377/*
378 * Function irlan_provider_register(void)
379 *
380 * Register provider support so we can accept incoming connections.
YOSHIFUJI Hideaki6819bc22007-02-09 23:24:53 +0900381 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700382 */
383int irlan_provider_open_ctrl_tsap(struct irlan_cb *self)
384{
385 struct tsap_cb *tsap;
386 notify_t notify;
YOSHIFUJI Hideaki6819bc22007-02-09 23:24:53 +0900387
Harvey Harrison0dc47872008-03-05 20:47:47 -0800388 IRDA_DEBUG(4, "%s()\n", __func__ );
Linus Torvalds1da177e2005-04-16 15:20:36 -0700389
390 IRDA_ASSERT(self != NULL, return -1;);
391 IRDA_ASSERT(self->magic == IRLAN_MAGIC, return -1;);
392
393 /* Check if already open */
394 if (self->provider.tsap_ctrl)
395 return -1;
YOSHIFUJI Hideaki6819bc22007-02-09 23:24:53 +0900396
Linus Torvalds1da177e2005-04-16 15:20:36 -0700397 /*
398 * First register well known control TSAP
399 */
400 irda_notify_init(&notify);
401 notify.data_indication = irlan_provider_data_indication;
402 notify.connect_indication = irlan_provider_connect_indication;
403 notify.disconnect_indication = irlan_provider_disconnect_indication;
404 notify.instance = self;
405 strlcpy(notify.name, "IrLAN ctrl (p)", sizeof(notify.name));
406
407 tsap = irttp_open_tsap(LSAP_ANY, 1, &notify);
408 if (!tsap) {
Harvey Harrison0dc47872008-03-05 20:47:47 -0800409 IRDA_DEBUG(2, "%s(), Got no tsap!\n", __func__ );
Linus Torvalds1da177e2005-04-16 15:20:36 -0700410 return -1;
411 }
412 self->provider.tsap_ctrl = tsap;
413
414 /* Register with LM-IAS */
415 irlan_ias_register(self, tsap->stsap_sel);
416
417 return 0;
418}
419