Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /********************************************************************* |
2 | * | |
3 | * Filename: ircomm_ttp.c | |
4 | * Version: 1.0 | |
5 | * Description: Interface between IrCOMM and IrTTP | |
6 | * Status: Stable | |
7 | * Author: Dag Brattli <dagb@cs.uit.no> | |
8 | * Created at: Sun Jun 6 20:48:27 1999 | |
9 | * Modified at: Mon Dec 13 11:35:13 1999 | |
10 | * Modified by: Dag Brattli <dagb@cs.uit.no> | |
11 | * | |
12 | * Copyright (c) 1999 Dag Brattli, All Rights Reserved. | |
13 | * Copyright (c) 2000-2003 Jean Tourrilhes <jt@hpl.hp.com> | |
14 | * | |
15 | * This program is free software; you can redistribute it and/or | |
16 | * modify it under the terms of the GNU General Public License as | |
17 | * published by the Free Software Foundation; either version 2 of | |
18 | * the License, or (at your option) any later version. | |
19 | * | |
20 | * This program is distributed in the hope that it will be useful, | |
21 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
22 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
23 | * GNU General Public License for more details. | |
24 | * | |
25 | * You should have received a copy of the GNU General Public License | |
26 | * along with this program; if not, write to the Free Software | |
27 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, | |
28 | * MA 02111-1307 USA | |
29 | * | |
30 | ********************************************************************/ | |
31 | ||
32 | #include <linux/sched.h> | |
33 | #include <linux/init.h> | |
34 | ||
35 | #include <net/irda/irda.h> | |
36 | #include <net/irda/irlmp.h> | |
37 | #include <net/irda/iriap.h> | |
38 | #include <net/irda/irttp.h> | |
39 | ||
40 | #include <net/irda/ircomm_event.h> | |
41 | #include <net/irda/ircomm_ttp.h> | |
42 | ||
43 | static int ircomm_ttp_data_indication(void *instance, void *sap, | |
44 | struct sk_buff *skb); | |
45 | static void ircomm_ttp_connect_confirm(void *instance, void *sap, | |
46 | struct qos_info *qos, | |
47 | __u32 max_sdu_size, | |
48 | __u8 max_header_size, | |
49 | struct sk_buff *skb); | |
50 | static void ircomm_ttp_connect_indication(void *instance, void *sap, | |
51 | struct qos_info *qos, | |
52 | __u32 max_sdu_size, | |
53 | __u8 max_header_size, | |
54 | struct sk_buff *skb); | |
55 | static void ircomm_ttp_flow_indication(void *instance, void *sap, | |
56 | LOCAL_FLOW cmd); | |
57 | static void ircomm_ttp_disconnect_indication(void *instance, void *sap, | |
58 | LM_REASON reason, | |
59 | struct sk_buff *skb); | |
60 | static int ircomm_ttp_data_request(struct ircomm_cb *self, | |
61 | struct sk_buff *skb, | |
62 | int clen); | |
63 | static int ircomm_ttp_connect_request(struct ircomm_cb *self, | |
64 | struct sk_buff *userdata, | |
65 | struct ircomm_info *info); | |
66 | static int ircomm_ttp_connect_response(struct ircomm_cb *self, | |
67 | struct sk_buff *userdata); | |
68 | static int ircomm_ttp_disconnect_request(struct ircomm_cb *self, | |
69 | struct sk_buff *userdata, | |
70 | struct ircomm_info *info); | |
71 | ||
72 | /* | |
73 | * Function ircomm_open_tsap (self) | |
74 | * | |
75 | * | |
76 | * | |
77 | */ | |
78 | int ircomm_open_tsap(struct ircomm_cb *self) | |
79 | { | |
80 | notify_t notify; | |
81 | ||
82 | IRDA_DEBUG(4, "%s()\n", __FUNCTION__ ); | |
83 | ||
84 | /* Register callbacks */ | |
85 | irda_notify_init(¬ify); | |
86 | notify.data_indication = ircomm_ttp_data_indication; | |
87 | notify.connect_confirm = ircomm_ttp_connect_confirm; | |
88 | notify.connect_indication = ircomm_ttp_connect_indication; | |
89 | notify.flow_indication = ircomm_ttp_flow_indication; | |
90 | notify.disconnect_indication = ircomm_ttp_disconnect_indication; | |
91 | notify.instance = self; | |
92 | strlcpy(notify.name, "IrCOMM", sizeof(notify.name)); | |
93 | ||
94 | self->tsap = irttp_open_tsap(LSAP_ANY, DEFAULT_INITIAL_CREDIT, | |
95 | ¬ify); | |
96 | if (!self->tsap) { | |
97 | IRDA_DEBUG(0, "%sfailed to allocate tsap\n", __FUNCTION__ ); | |
98 | return -1; | |
99 | } | |
100 | self->slsap_sel = self->tsap->stsap_sel; | |
101 | ||
102 | /* | |
103 | * Initialize the call-table for issuing commands | |
104 | */ | |
105 | self->issue.data_request = ircomm_ttp_data_request; | |
106 | self->issue.connect_request = ircomm_ttp_connect_request; | |
107 | self->issue.connect_response = ircomm_ttp_connect_response; | |
108 | self->issue.disconnect_request = ircomm_ttp_disconnect_request; | |
109 | ||
110 | return 0; | |
111 | } | |
112 | ||
113 | /* | |
114 | * Function ircomm_ttp_connect_request (self, userdata) | |
115 | * | |
116 | * | |
117 | * | |
118 | */ | |
119 | static int ircomm_ttp_connect_request(struct ircomm_cb *self, | |
120 | struct sk_buff *userdata, | |
121 | struct ircomm_info *info) | |
122 | { | |
123 | int ret = 0; | |
124 | ||
125 | IRDA_DEBUG(4, "%s()\n", __FUNCTION__ ); | |
126 | ||
127 | /* Don't forget to refcount it - should be NULL anyway */ | |
128 | if(userdata) | |
129 | skb_get(userdata); | |
130 | ||
131 | ret = irttp_connect_request(self->tsap, info->dlsap_sel, | |
132 | info->saddr, info->daddr, NULL, | |
133 | TTP_SAR_DISABLE, userdata); | |
134 | ||
135 | return ret; | |
136 | } | |
137 | ||
138 | /* | |
139 | * Function ircomm_ttp_connect_response (self, skb) | |
140 | * | |
141 | * | |
142 | * | |
143 | */ | |
144 | static int ircomm_ttp_connect_response(struct ircomm_cb *self, | |
145 | struct sk_buff *userdata) | |
146 | { | |
147 | int ret; | |
148 | ||
149 | IRDA_DEBUG(4, "%s()\n", __FUNCTION__ ); | |
150 | ||
151 | /* Don't forget to refcount it - should be NULL anyway */ | |
152 | if(userdata) | |
153 | skb_get(userdata); | |
154 | ||
155 | ret = irttp_connect_response(self->tsap, TTP_SAR_DISABLE, userdata); | |
156 | ||
157 | return ret; | |
158 | } | |
159 | ||
160 | /* | |
161 | * Function ircomm_ttp_data_request (self, userdata) | |
162 | * | |
163 | * Send IrCOMM data to IrTTP layer. Currently we do not try to combine | |
164 | * control data with pure data, so they will be sent as separate frames. | |
165 | * Should not be a big problem though, since control frames are rare. But | |
166 | * some of them are sent after connection establishment, so this can | |
167 | * increase the latency a bit. | |
168 | */ | |
169 | static int ircomm_ttp_data_request(struct ircomm_cb *self, | |
170 | struct sk_buff *skb, | |
171 | int clen) | |
172 | { | |
173 | int ret; | |
174 | ||
175 | IRDA_ASSERT(skb != NULL, return -1;); | |
176 | ||
177 | IRDA_DEBUG(2, "%s(), clen=%d\n", __FUNCTION__ , clen); | |
178 | ||
179 | /* | |
180 | * Insert clen field, currently we either send data only, or control | |
181 | * only frames, to make things easier and avoid queueing | |
182 | */ | |
183 | IRDA_ASSERT(skb_headroom(skb) >= IRCOMM_HEADER_SIZE, return -1;); | |
184 | ||
185 | /* Don't forget to refcount it - see ircomm_tty_do_softint() */ | |
186 | skb_get(skb); | |
187 | ||
188 | skb_push(skb, IRCOMM_HEADER_SIZE); | |
189 | ||
190 | skb->data[0] = clen; | |
191 | ||
192 | ret = irttp_data_request(self->tsap, skb); | |
193 | if (ret) { | |
194 | IRDA_ERROR("%s(), failed\n", __FUNCTION__); | |
195 | /* irttp_data_request already free the packet */ | |
196 | } | |
197 | ||
198 | return ret; | |
199 | } | |
200 | ||
201 | /* | |
202 | * Function ircomm_ttp_data_indication (instance, sap, skb) | |
203 | * | |
204 | * Incoming data | |
205 | * | |
206 | */ | |
207 | static int ircomm_ttp_data_indication(void *instance, void *sap, | |
208 | struct sk_buff *skb) | |
209 | { | |
210 | struct ircomm_cb *self = (struct ircomm_cb *) instance; | |
211 | ||
212 | IRDA_DEBUG(4, "%s()\n", __FUNCTION__ ); | |
213 | ||
214 | IRDA_ASSERT(self != NULL, return -1;); | |
215 | IRDA_ASSERT(self->magic == IRCOMM_MAGIC, return -1;); | |
216 | IRDA_ASSERT(skb != NULL, return -1;); | |
217 | ||
218 | ircomm_do_event(self, IRCOMM_TTP_DATA_INDICATION, skb, NULL); | |
219 | ||
220 | /* Drop reference count - see ircomm_tty_data_indication(). */ | |
221 | dev_kfree_skb(skb); | |
222 | ||
223 | return 0; | |
224 | } | |
225 | ||
226 | static void ircomm_ttp_connect_confirm(void *instance, void *sap, | |
227 | struct qos_info *qos, | |
228 | __u32 max_sdu_size, | |
229 | __u8 max_header_size, | |
230 | struct sk_buff *skb) | |
231 | { | |
232 | struct ircomm_cb *self = (struct ircomm_cb *) instance; | |
233 | struct ircomm_info info; | |
234 | ||
235 | IRDA_DEBUG(4, "%s()\n", __FUNCTION__ ); | |
236 | ||
237 | IRDA_ASSERT(self != NULL, return;); | |
238 | IRDA_ASSERT(self->magic == IRCOMM_MAGIC, return;); | |
239 | IRDA_ASSERT(skb != NULL, return;); | |
240 | IRDA_ASSERT(qos != NULL, goto out;); | |
241 | ||
242 | if (max_sdu_size != TTP_SAR_DISABLE) { | |
243 | IRDA_ERROR("%s(), SAR not allowed for IrCOMM!\n", | |
244 | __FUNCTION__); | |
245 | goto out; | |
246 | } | |
247 | ||
248 | info.max_data_size = irttp_get_max_seg_size(self->tsap) | |
249 | - IRCOMM_HEADER_SIZE; | |
250 | info.max_header_size = max_header_size + IRCOMM_HEADER_SIZE; | |
251 | info.qos = qos; | |
252 | ||
253 | ircomm_do_event(self, IRCOMM_TTP_CONNECT_CONFIRM, skb, &info); | |
254 | ||
255 | out: | |
256 | /* Drop reference count - see ircomm_tty_connect_confirm(). */ | |
257 | dev_kfree_skb(skb); | |
258 | } | |
259 | ||
260 | /* | |
261 | * Function ircomm_ttp_connect_indication (instance, sap, qos, max_sdu_size, | |
262 | * max_header_size, skb) | |
263 | * | |
264 | * | |
265 | * | |
266 | */ | |
267 | static void ircomm_ttp_connect_indication(void *instance, void *sap, | |
268 | struct qos_info *qos, | |
269 | __u32 max_sdu_size, | |
270 | __u8 max_header_size, | |
271 | struct sk_buff *skb) | |
272 | { | |
273 | struct ircomm_cb *self = (struct ircomm_cb *)instance; | |
274 | struct ircomm_info info; | |
275 | ||
276 | IRDA_DEBUG(4, "%s()\n", __FUNCTION__ ); | |
277 | ||
278 | IRDA_ASSERT(self != NULL, return;); | |
279 | IRDA_ASSERT(self->magic == IRCOMM_MAGIC, return;); | |
280 | IRDA_ASSERT(skb != NULL, return;); | |
281 | IRDA_ASSERT(qos != NULL, goto out;); | |
282 | ||
283 | if (max_sdu_size != TTP_SAR_DISABLE) { | |
284 | IRDA_ERROR("%s(), SAR not allowed for IrCOMM!\n", | |
285 | __FUNCTION__); | |
286 | goto out; | |
287 | } | |
288 | ||
289 | info.max_data_size = irttp_get_max_seg_size(self->tsap) | |
290 | - IRCOMM_HEADER_SIZE; | |
291 | info.max_header_size = max_header_size + IRCOMM_HEADER_SIZE; | |
292 | info.qos = qos; | |
293 | ||
294 | ircomm_do_event(self, IRCOMM_TTP_CONNECT_INDICATION, skb, &info); | |
295 | ||
296 | out: | |
297 | /* Drop reference count - see ircomm_tty_connect_indication(). */ | |
298 | dev_kfree_skb(skb); | |
299 | } | |
300 | ||
301 | /* | |
302 | * Function ircomm_ttp_disconnect_request (self, userdata, info) | |
303 | * | |
304 | * | |
305 | * | |
306 | */ | |
307 | static int ircomm_ttp_disconnect_request(struct ircomm_cb *self, | |
308 | struct sk_buff *userdata, | |
309 | struct ircomm_info *info) | |
310 | { | |
311 | int ret; | |
312 | ||
313 | /* Don't forget to refcount it - should be NULL anyway */ | |
314 | if(userdata) | |
315 | skb_get(userdata); | |
316 | ||
317 | ret = irttp_disconnect_request(self->tsap, userdata, P_NORMAL); | |
318 | ||
319 | return ret; | |
320 | } | |
321 | ||
322 | /* | |
323 | * Function ircomm_ttp_disconnect_indication (instance, sap, reason, skb) | |
324 | * | |
325 | * | |
326 | * | |
327 | */ | |
328 | static void ircomm_ttp_disconnect_indication(void *instance, void *sap, | |
329 | LM_REASON reason, | |
330 | struct sk_buff *skb) | |
331 | { | |
332 | struct ircomm_cb *self = (struct ircomm_cb *) instance; | |
333 | struct ircomm_info info; | |
334 | ||
335 | IRDA_DEBUG(2, "%s()\n", __FUNCTION__ ); | |
336 | ||
337 | IRDA_ASSERT(self != NULL, return;); | |
338 | IRDA_ASSERT(self->magic == IRCOMM_MAGIC, return;); | |
339 | ||
340 | info.reason = reason; | |
341 | ||
342 | ircomm_do_event(self, IRCOMM_TTP_DISCONNECT_INDICATION, skb, &info); | |
343 | ||
344 | /* Drop reference count - see ircomm_tty_disconnect_indication(). */ | |
345 | if(skb) | |
346 | dev_kfree_skb(skb); | |
347 | } | |
348 | ||
349 | /* | |
350 | * Function ircomm_ttp_flow_indication (instance, sap, cmd) | |
351 | * | |
352 | * Layer below is telling us to start or stop the flow of data | |
353 | * | |
354 | */ | |
355 | static void ircomm_ttp_flow_indication(void *instance, void *sap, | |
356 | LOCAL_FLOW cmd) | |
357 | { | |
358 | struct ircomm_cb *self = (struct ircomm_cb *) instance; | |
359 | ||
360 | IRDA_DEBUG(4, "%s()\n", __FUNCTION__ ); | |
361 | ||
362 | IRDA_ASSERT(self != NULL, return;); | |
363 | IRDA_ASSERT(self->magic == IRCOMM_MAGIC, return;); | |
364 | ||
365 | if (self->notify.flow_indication) | |
366 | self->notify.flow_indication(self->notify.instance, self, cmd); | |
367 | } | |
368 | ||
369 |