File: /usr/src/linux/net/irda/ircomm/ircomm_ttp.c
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 *
14 * This program is free software; you can redistribute it and/or
15 * modify it under the terms of the GNU General Public License as
16 * published by the Free Software Foundation; either version 2 of
17 * the License, or (at your option) any later version.
18 *
19 * This program is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU General Public License for more details.
23 *
24 * You should have received a copy of the GNU General Public License
25 * along with this program; if not, write to the Free Software
26 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
27 * MA 02111-1307 USA
28 *
29 ********************************************************************/
30
31 #include <linux/sched.h>
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 /*
43 * Function ircomm_open_tsap (self)
44 *
45 *
46 *
47 */
48 int ircomm_open_tsap(struct ircomm_cb *self)
49 {
50 notify_t notify;
51
52 IRDA_DEBUG(4, __FUNCTION__ "()\n");
53
54 /* Register callbacks */
55 irda_notify_init(¬ify);
56 notify.data_indication = ircomm_ttp_data_indication;
57 notify.connect_confirm = ircomm_ttp_connect_confirm;
58 notify.connect_indication = ircomm_ttp_connect_indication;
59 notify.flow_indication = ircomm_ttp_flow_indication;
60 notify.disconnect_indication = ircomm_ttp_disconnect_indication;
61 notify.instance = self;
62 strncpy(notify.name, "IrCOMM", NOTIFY_MAX_NAME);
63
64 self->tsap = irttp_open_tsap(LSAP_ANY, DEFAULT_INITIAL_CREDIT,
65 ¬ify);
66 if (!self->tsap) {
67 IRDA_DEBUG(0, __FUNCTION__"failed to allocate tsap\n");
68 return -1;
69 }
70 self->slsap_sel = self->tsap->stsap_sel;
71
72 /*
73 * Initialize the call-table for issuing commands
74 */
75 self->issue.data_request = ircomm_ttp_data_request;
76 self->issue.connect_request = ircomm_ttp_connect_request;
77 self->issue.connect_response = ircomm_ttp_connect_response;
78 self->issue.disconnect_request = ircomm_ttp_disconnect_request;
79
80 return 0;
81 }
82
83 /*
84 * Function ircomm_ttp_connect_request (self, userdata)
85 *
86 *
87 *
88 */
89 int ircomm_ttp_connect_request(struct ircomm_cb *self,
90 struct sk_buff *userdata,
91 struct ircomm_info *info)
92 {
93 int ret = 0;
94
95 IRDA_DEBUG(4, __FUNCTION__ "()\n");
96
97 ret = irttp_connect_request(self->tsap, info->dlsap_sel,
98 info->saddr, info->daddr, NULL,
99 TTP_SAR_DISABLE, userdata);
100 return ret;
101 }
102
103 /*
104 * Function ircomm_ttp_connect_response (self, skb)
105 *
106 *
107 *
108 */
109 int ircomm_ttp_connect_response(struct ircomm_cb *self, struct sk_buff *skb)
110 {
111 int ret;
112
113 IRDA_DEBUG(4, __FUNCTION__"()\n");
114
115 ret = irttp_connect_response(self->tsap, TTP_SAR_DISABLE, skb);
116
117 return ret;
118 }
119
120 /*
121 * Function ircomm_ttp_data_request (self, userdata)
122 *
123 * Send IrCOMM data to IrTTP layer. Currently we do not try to combine
124 * control data with pure data, so they will be sent as separate frames.
125 * Should not be a big problem though, since control frames are rare. But
126 * some of them are sent after connection establishment, so this can
127 * increase the latency a bit.
128 */
129 int ircomm_ttp_data_request(struct ircomm_cb *self, struct sk_buff *skb,
130 int clen)
131 {
132 int ret;
133
134 ASSERT(skb != NULL, return -1;);
135
136 IRDA_DEBUG(2, __FUNCTION__"(), clen=%d\n", clen);
137
138 /*
139 * Insert clen field, currently we either send data only, or control
140 * only frames, to make things easier and avoid queueing
141 */
142 ASSERT(skb_headroom(skb) >= IRCOMM_HEADER_SIZE, return -1;);
143 skb_push(skb, IRCOMM_HEADER_SIZE);
144
145 skb->data[0] = clen;
146
147 ret = irttp_data_request(self->tsap, skb);
148 if (ret) {
149 ERROR(__FUNCTION__ "(), failed\n");
150 dev_kfree_skb(skb);
151 }
152
153 return ret;
154 }
155
156 /*
157 * Function ircomm_ttp_data_indication (instance, sap, skb)
158 *
159 * Incoming data
160 *
161 */
162 int ircomm_ttp_data_indication(void *instance, void *sap,
163 struct sk_buff *skb)
164 {
165 struct ircomm_cb *self = (struct ircomm_cb *) instance;
166
167 IRDA_DEBUG(4, __FUNCTION__"()\n");
168
169 ASSERT(self != NULL, return -1;);
170 ASSERT(self->magic == IRCOMM_MAGIC, return -1;);
171 ASSERT(skb != NULL, return -1;);
172
173 ircomm_do_event(self, IRCOMM_TTP_DATA_INDICATION, skb, NULL);
174
175 return 0;
176 }
177
178 void ircomm_ttp_connect_confirm(void *instance, void *sap,
179 struct qos_info *qos,
180 __u32 max_sdu_size,
181 __u8 max_header_size,
182 struct sk_buff *skb)
183 {
184 struct ircomm_cb *self = (struct ircomm_cb *) instance;
185 struct ircomm_info info;
186
187 IRDA_DEBUG(4, __FUNCTION__"()\n");
188
189 ASSERT(self != NULL, return;);
190 ASSERT(self->magic == IRCOMM_MAGIC, return;);
191 ASSERT(skb != NULL, return;);
192 ASSERT(qos != NULL, return;);
193
194 if (max_sdu_size != TTP_SAR_DISABLE) {
195 ERROR(__FUNCTION__ "(), SAR not allowed for IrCOMM!\n");
196 dev_kfree_skb(skb);
197 return;
198 }
199
200 info.max_data_size = irttp_get_max_seg_size(self->tsap)
201 - IRCOMM_HEADER_SIZE;
202 info.max_header_size = max_header_size + IRCOMM_HEADER_SIZE;
203 info.qos = qos;
204
205 ircomm_do_event(self, IRCOMM_TTP_CONNECT_CONFIRM, skb, &info);
206 }
207
208 /*
209 * Function ircomm_ttp_connect_indication (instance, sap, qos, max_sdu_size,
210 * max_header_size, skb)
211 *
212 *
213 *
214 */
215 void ircomm_ttp_connect_indication(void *instance, void *sap,
216 struct qos_info *qos,
217 __u32 max_sdu_size,
218 __u8 max_header_size,
219 struct sk_buff *skb)
220 {
221 struct ircomm_cb *self = (struct ircomm_cb *)instance;
222 struct ircomm_info info;
223
224 IRDA_DEBUG(4, __FUNCTION__"()\n");
225
226 ASSERT(self != NULL, return;);
227 ASSERT(self->magic == IRCOMM_MAGIC, return;);
228 ASSERT(skb != NULL, return;);
229 ASSERT(qos != NULL, return;);
230
231 if (max_sdu_size != TTP_SAR_DISABLE) {
232 ERROR(__FUNCTION__ "(), SAR not allowed for IrCOMM!\n");
233 dev_kfree_skb(skb);
234 return;
235 }
236
237 info.max_data_size = irttp_get_max_seg_size(self->tsap)
238 - IRCOMM_HEADER_SIZE;
239 info.max_header_size = max_header_size + IRCOMM_HEADER_SIZE;
240 info.qos = qos;
241
242 ircomm_do_event(self, IRCOMM_TTP_CONNECT_INDICATION, skb, &info);
243 }
244
245 /*
246 * Function ircomm_ttp_disconnect_request (self, userdata, info)
247 *
248 *
249 *
250 */
251 int ircomm_ttp_disconnect_request(struct ircomm_cb *self,
252 struct sk_buff *userdata,
253 struct ircomm_info *info)
254 {
255 int ret;
256
257 ret = irttp_disconnect_request(self->tsap, userdata, P_NORMAL);
258
259 return ret;
260 }
261
262 /*
263 * Function ircomm_ttp_disconnect_indication (instance, sap, reason, skb)
264 *
265 *
266 *
267 */
268 void ircomm_ttp_disconnect_indication(void *instance, void *sap,
269 LM_REASON reason,
270 struct sk_buff *skb)
271 {
272 struct ircomm_cb *self = (struct ircomm_cb *) instance;
273 struct ircomm_info info;
274
275 IRDA_DEBUG(2, __FUNCTION__"()\n");
276
277 ASSERT(self != NULL, return;);
278 ASSERT(self->magic == IRCOMM_MAGIC, return;);
279
280 info.reason = reason;
281
282 ircomm_do_event(self, IRCOMM_TTP_DISCONNECT_INDICATION, skb, &info);
283 }
284
285 /*
286 * Function ircomm_ttp_flow_indication (instance, sap, cmd)
287 *
288 * Layer below is telling us to start or stop the flow of data
289 *
290 */
291 void ircomm_ttp_flow_indication(void *instance, void *sap, LOCAL_FLOW cmd)
292 {
293 struct ircomm_cb *self = (struct ircomm_cb *) instance;
294
295 IRDA_DEBUG(4, __FUNCTION__ "()\n");
296
297 ASSERT(self != NULL, return;);
298 ASSERT(self->magic == IRCOMM_MAGIC, return;);
299
300 if (self->notify.flow_indication)
301 self->notify.flow_indication(self->notify.instance, self, cmd);
302 }
303
304
305