Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /********************************************************************* |
6819bc2e | 2 | * |
1da177e4 LT |
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> | |
6819bc2e | 11 | * |
1da177e4 LT |
12 | * Copyright (c) 1999 Dag Brattli, All Rights Reserved. |
13 | * Copyright (c) 2000-2003 Jean Tourrilhes <jt@hpl.hp.com> | |
6819bc2e YH |
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 | |
1da177e4 | 18 | * the License, or (at your option) any later version. |
6819bc2e | 19 | * |
1da177e4 LT |
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. | |
6819bc2e YH |
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, | |
1da177e4 | 28 | * MA 02111-1307 USA |
6819bc2e | 29 | * |
1da177e4 LT |
30 | ********************************************************************/ |
31 | ||
1da177e4 LT |
32 | #include <linux/init.h> |
33 | ||
34 | #include <net/irda/irda.h> | |
35 | #include <net/irda/irlmp.h> | |
36 | #include <net/irda/iriap.h> | |
37 | #include <net/irda/irttp.h> | |
38 | ||
39 | #include <net/irda/ircomm_event.h> | |
40 | #include <net/irda/ircomm_ttp.h> | |
41 | ||
42 | static int ircomm_ttp_data_indication(void *instance, void *sap, | |
43 | struct sk_buff *skb); | |
44 | static void ircomm_ttp_connect_confirm(void *instance, void *sap, | |
6819bc2e YH |
45 | struct qos_info *qos, |
46 | __u32 max_sdu_size, | |
1da177e4 LT |
47 | __u8 max_header_size, |
48 | struct sk_buff *skb); | |
49 | static void ircomm_ttp_connect_indication(void *instance, void *sap, | |
50 | struct qos_info *qos, | |
51 | __u32 max_sdu_size, | |
52 | __u8 max_header_size, | |
53 | struct sk_buff *skb); | |
54 | static void ircomm_ttp_flow_indication(void *instance, void *sap, | |
55 | LOCAL_FLOW cmd); | |
6819bc2e | 56 | static void ircomm_ttp_disconnect_indication(void *instance, void *sap, |
1da177e4 LT |
57 | LM_REASON reason, |
58 | struct sk_buff *skb); | |
59 | static int ircomm_ttp_data_request(struct ircomm_cb *self, | |
6819bc2e | 60 | struct sk_buff *skb, |
1da177e4 | 61 | int clen); |
6819bc2e YH |
62 | static int ircomm_ttp_connect_request(struct ircomm_cb *self, |
63 | struct sk_buff *userdata, | |
1da177e4 LT |
64 | struct ircomm_info *info); |
65 | static int ircomm_ttp_connect_response(struct ircomm_cb *self, | |
66 | struct sk_buff *userdata); | |
6819bc2e YH |
67 | static int ircomm_ttp_disconnect_request(struct ircomm_cb *self, |
68 | struct sk_buff *userdata, | |
1da177e4 LT |
69 | struct ircomm_info *info); |
70 | ||
71 | /* | |
72 | * Function ircomm_open_tsap (self) | |
73 | * | |
6819bc2e | 74 | * |
1da177e4 LT |
75 | * |
76 | */ | |
77 | int ircomm_open_tsap(struct ircomm_cb *self) | |
78 | { | |
79 | notify_t notify; | |
80 | ||
81 | IRDA_DEBUG(4, "%s()\n", __FUNCTION__ ); | |
82 | ||
83 | /* Register callbacks */ | |
84 | irda_notify_init(¬ify); | |
85 | notify.data_indication = ircomm_ttp_data_indication; | |
86 | notify.connect_confirm = ircomm_ttp_connect_confirm; | |
87 | notify.connect_indication = ircomm_ttp_connect_indication; | |
88 | notify.flow_indication = ircomm_ttp_flow_indication; | |
89 | notify.disconnect_indication = ircomm_ttp_disconnect_indication; | |
90 | notify.instance = self; | |
91 | strlcpy(notify.name, "IrCOMM", sizeof(notify.name)); | |
92 | ||
93 | self->tsap = irttp_open_tsap(LSAP_ANY, DEFAULT_INITIAL_CREDIT, | |
94 | ¬ify); | |
95 | if (!self->tsap) { | |
96 | IRDA_DEBUG(0, "%sfailed to allocate tsap\n", __FUNCTION__ ); | |
97 | return -1; | |
98 | } | |
99 | self->slsap_sel = self->tsap->stsap_sel; | |
100 | ||
101 | /* | |
102 | * Initialize the call-table for issuing commands | |
103 | */ | |
104 | self->issue.data_request = ircomm_ttp_data_request; | |
105 | self->issue.connect_request = ircomm_ttp_connect_request; | |
106 | self->issue.connect_response = ircomm_ttp_connect_response; | |
107 | self->issue.disconnect_request = ircomm_ttp_disconnect_request; | |
108 | ||
109 | return 0; | |
110 | } | |
111 | ||
112 | /* | |
113 | * Function ircomm_ttp_connect_request (self, userdata) | |
114 | * | |
6819bc2e | 115 | * |
1da177e4 LT |
116 | * |
117 | */ | |
6819bc2e YH |
118 | static int ircomm_ttp_connect_request(struct ircomm_cb *self, |
119 | struct sk_buff *userdata, | |
1da177e4 LT |
120 | struct ircomm_info *info) |
121 | { | |
122 | int ret = 0; | |
123 | ||
124 | IRDA_DEBUG(4, "%s()\n", __FUNCTION__ ); | |
125 | ||
126 | /* Don't forget to refcount it - should be NULL anyway */ | |
127 | if(userdata) | |
128 | skb_get(userdata); | |
129 | ||
130 | ret = irttp_connect_request(self->tsap, info->dlsap_sel, | |
6819bc2e YH |
131 | info->saddr, info->daddr, NULL, |
132 | TTP_SAR_DISABLE, userdata); | |
1da177e4 LT |
133 | |
134 | return ret; | |
6819bc2e | 135 | } |
1da177e4 LT |
136 | |
137 | /* | |
138 | * Function ircomm_ttp_connect_response (self, skb) | |
139 | * | |
6819bc2e | 140 | * |
1da177e4 LT |
141 | * |
142 | */ | |
143 | static int ircomm_ttp_connect_response(struct ircomm_cb *self, | |
144 | struct sk_buff *userdata) | |
145 | { | |
146 | int ret; | |
147 | ||
148 | IRDA_DEBUG(4, "%s()\n", __FUNCTION__ ); | |
6819bc2e | 149 | |
1da177e4 LT |
150 | /* Don't forget to refcount it - should be NULL anyway */ |
151 | if(userdata) | |
152 | skb_get(userdata); | |
153 | ||
154 | ret = irttp_connect_response(self->tsap, TTP_SAR_DISABLE, userdata); | |
155 | ||
156 | return ret; | |
157 | } | |
158 | ||
159 | /* | |
160 | * Function ircomm_ttp_data_request (self, userdata) | |
161 | * | |
6819bc2e YH |
162 | * Send IrCOMM data to IrTTP layer. Currently we do not try to combine |
163 | * control data with pure data, so they will be sent as separate frames. | |
1da177e4 | 164 | * Should not be a big problem though, since control frames are rare. But |
6819bc2e | 165 | * some of them are sent after connection establishment, so this can |
1da177e4 LT |
166 | * increase the latency a bit. |
167 | */ | |
168 | static int ircomm_ttp_data_request(struct ircomm_cb *self, | |
6819bc2e | 169 | struct sk_buff *skb, |
1da177e4 LT |
170 | int clen) |
171 | { | |
172 | int ret; | |
173 | ||
174 | IRDA_ASSERT(skb != NULL, return -1;); | |
175 | ||
176 | IRDA_DEBUG(2, "%s(), clen=%d\n", __FUNCTION__ , clen); | |
177 | ||
6819bc2e | 178 | /* |
1da177e4 LT |
179 | * Insert clen field, currently we either send data only, or control |
180 | * only frames, to make things easier and avoid queueing | |
181 | */ | |
182 | IRDA_ASSERT(skb_headroom(skb) >= IRCOMM_HEADER_SIZE, return -1;); | |
183 | ||
184 | /* Don't forget to refcount it - see ircomm_tty_do_softint() */ | |
185 | skb_get(skb); | |
186 | ||
187 | skb_push(skb, IRCOMM_HEADER_SIZE); | |
188 | ||
189 | skb->data[0] = clen; | |
190 | ||
191 | ret = irttp_data_request(self->tsap, skb); | |
192 | if (ret) { | |
193 | IRDA_ERROR("%s(), failed\n", __FUNCTION__); | |
194 | /* irttp_data_request already free the packet */ | |
195 | } | |
196 | ||
197 | return ret; | |
198 | } | |
199 | ||
200 | /* | |
201 | * Function ircomm_ttp_data_indication (instance, sap, skb) | |
202 | * | |
203 | * Incoming data | |
204 | * | |
205 | */ | |
206 | static int ircomm_ttp_data_indication(void *instance, void *sap, | |
207 | struct sk_buff *skb) | |
208 | { | |
209 | struct ircomm_cb *self = (struct ircomm_cb *) instance; | |
210 | ||
211 | IRDA_DEBUG(4, "%s()\n", __FUNCTION__ ); | |
6819bc2e | 212 | |
1da177e4 LT |
213 | IRDA_ASSERT(self != NULL, return -1;); |
214 | IRDA_ASSERT(self->magic == IRCOMM_MAGIC, return -1;); | |
215 | IRDA_ASSERT(skb != NULL, return -1;); | |
216 | ||
217 | ircomm_do_event(self, IRCOMM_TTP_DATA_INDICATION, skb, NULL); | |
218 | ||
219 | /* Drop reference count - see ircomm_tty_data_indication(). */ | |
220 | dev_kfree_skb(skb); | |
221 | ||
222 | return 0; | |
223 | } | |
224 | ||
225 | static void ircomm_ttp_connect_confirm(void *instance, void *sap, | |
6819bc2e YH |
226 | struct qos_info *qos, |
227 | __u32 max_sdu_size, | |
1da177e4 LT |
228 | __u8 max_header_size, |
229 | struct sk_buff *skb) | |
230 | { | |
231 | struct ircomm_cb *self = (struct ircomm_cb *) instance; | |
232 | struct ircomm_info info; | |
233 | ||
234 | IRDA_DEBUG(4, "%s()\n", __FUNCTION__ ); | |
235 | ||
236 | IRDA_ASSERT(self != NULL, return;); | |
237 | IRDA_ASSERT(self->magic == IRCOMM_MAGIC, return;); | |
238 | IRDA_ASSERT(skb != NULL, return;); | |
239 | IRDA_ASSERT(qos != NULL, goto out;); | |
240 | ||
241 | if (max_sdu_size != TTP_SAR_DISABLE) { | |
242 | IRDA_ERROR("%s(), SAR not allowed for IrCOMM!\n", | |
243 | __FUNCTION__); | |
244 | goto out; | |
245 | } | |
246 | ||
247 | info.max_data_size = irttp_get_max_seg_size(self->tsap) | |
248 | - IRCOMM_HEADER_SIZE; | |
249 | info.max_header_size = max_header_size + IRCOMM_HEADER_SIZE; | |
250 | info.qos = qos; | |
251 | ||
252 | ircomm_do_event(self, IRCOMM_TTP_CONNECT_CONFIRM, skb, &info); | |
253 | ||
254 | out: | |
255 | /* Drop reference count - see ircomm_tty_connect_confirm(). */ | |
256 | dev_kfree_skb(skb); | |
257 | } | |
258 | ||
259 | /* | |
260 | * Function ircomm_ttp_connect_indication (instance, sap, qos, max_sdu_size, | |
261 | * max_header_size, skb) | |
262 | * | |
6819bc2e | 263 | * |
1da177e4 LT |
264 | * |
265 | */ | |
266 | static void ircomm_ttp_connect_indication(void *instance, void *sap, | |
267 | struct qos_info *qos, | |
268 | __u32 max_sdu_size, | |
269 | __u8 max_header_size, | |
270 | struct sk_buff *skb) | |
271 | { | |
272 | struct ircomm_cb *self = (struct ircomm_cb *)instance; | |
273 | struct ircomm_info info; | |
274 | ||
275 | IRDA_DEBUG(4, "%s()\n", __FUNCTION__ ); | |
276 | ||
277 | IRDA_ASSERT(self != NULL, return;); | |
278 | IRDA_ASSERT(self->magic == IRCOMM_MAGIC, return;); | |
279 | IRDA_ASSERT(skb != NULL, return;); | |
280 | IRDA_ASSERT(qos != NULL, goto out;); | |
281 | ||
282 | if (max_sdu_size != TTP_SAR_DISABLE) { | |
283 | IRDA_ERROR("%s(), SAR not allowed for IrCOMM!\n", | |
284 | __FUNCTION__); | |
285 | goto out; | |
286 | } | |
287 | ||
288 | info.max_data_size = irttp_get_max_seg_size(self->tsap) | |
289 | - IRCOMM_HEADER_SIZE; | |
290 | info.max_header_size = max_header_size + IRCOMM_HEADER_SIZE; | |
291 | info.qos = qos; | |
292 | ||
293 | ircomm_do_event(self, IRCOMM_TTP_CONNECT_INDICATION, skb, &info); | |
294 | ||
295 | out: | |
296 | /* Drop reference count - see ircomm_tty_connect_indication(). */ | |
297 | dev_kfree_skb(skb); | |
298 | } | |
299 | ||
300 | /* | |
301 | * Function ircomm_ttp_disconnect_request (self, userdata, info) | |
302 | * | |
6819bc2e | 303 | * |
1da177e4 LT |
304 | * |
305 | */ | |
6819bc2e YH |
306 | static int ircomm_ttp_disconnect_request(struct ircomm_cb *self, |
307 | struct sk_buff *userdata, | |
1da177e4 LT |
308 | struct ircomm_info *info) |
309 | { | |
310 | int ret; | |
311 | ||
312 | /* Don't forget to refcount it - should be NULL anyway */ | |
313 | if(userdata) | |
314 | skb_get(userdata); | |
315 | ||
316 | ret = irttp_disconnect_request(self->tsap, userdata, P_NORMAL); | |
317 | ||
318 | return ret; | |
319 | } | |
320 | ||
321 | /* | |
322 | * Function ircomm_ttp_disconnect_indication (instance, sap, reason, skb) | |
323 | * | |
6819bc2e | 324 | * |
1da177e4 LT |
325 | * |
326 | */ | |
6819bc2e | 327 | static void ircomm_ttp_disconnect_indication(void *instance, void *sap, |
1da177e4 LT |
328 | LM_REASON reason, |
329 | struct sk_buff *skb) | |
330 | { | |
331 | struct ircomm_cb *self = (struct ircomm_cb *) instance; | |
332 | struct ircomm_info info; | |
333 | ||
334 | IRDA_DEBUG(2, "%s()\n", __FUNCTION__ ); | |
335 | ||
336 | IRDA_ASSERT(self != NULL, return;); | |
337 | IRDA_ASSERT(self->magic == IRCOMM_MAGIC, return;); | |
338 | ||
339 | info.reason = reason; | |
340 | ||
341 | ircomm_do_event(self, IRCOMM_TTP_DISCONNECT_INDICATION, skb, &info); | |
342 | ||
343 | /* Drop reference count - see ircomm_tty_disconnect_indication(). */ | |
344 | if(skb) | |
345 | dev_kfree_skb(skb); | |
346 | } | |
347 | ||
348 | /* | |
349 | * Function ircomm_ttp_flow_indication (instance, sap, cmd) | |
350 | * | |
351 | * Layer below is telling us to start or stop the flow of data | |
352 | * | |
353 | */ | |
354 | static void ircomm_ttp_flow_indication(void *instance, void *sap, | |
355 | LOCAL_FLOW cmd) | |
356 | { | |
357 | struct ircomm_cb *self = (struct ircomm_cb *) instance; | |
358 | ||
359 | IRDA_DEBUG(4, "%s()\n", __FUNCTION__ ); | |
360 | ||
361 | IRDA_ASSERT(self != NULL, return;); | |
362 | IRDA_ASSERT(self->magic == IRCOMM_MAGIC, return;); | |
6819bc2e | 363 | |
1da177e4 LT |
364 | if (self->notify.flow_indication) |
365 | self->notify.flow_indication(self->notify.instance, self, cmd); | |
366 | } | |
367 | ||
368 |