1 /******************************************************************************
2 *
3 * Copyright (C) 2008-2012 Broadcom Corporation
4 *
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at:
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 *
17 ******************************************************************************/
18
19 /******************************************************************************
20 *
21 * this file contains the main GATT server attributes access request
22 * handling functions.
23 *
24 ******************************************************************************/
25
26 #include "bt_target.h"
27
28 #include "gatt_api.h"
29 #include "gatt_int.h"
30
31 #if BLE_INCLUDED == TRUE
32
33 #define GATTP_MAX_NUM_INC_SVR 0
34 #define GATTP_MAX_CHAR_NUM 2
35 #define GATTP_MAX_ATTR_NUM (GATTP_MAX_CHAR_NUM * 2 + GATTP_MAX_NUM_INC_SVR + 1)
36 #define GATTP_MAX_CHAR_VALUE_SIZE 50
37
38 #ifndef GATTP_ATTR_DB_SIZE
39 #define GATTP_ATTR_DB_SIZE GATT_DB_MEM_SIZE(GATTP_MAX_NUM_INC_SVR, GATTP_MAX_CHAR_NUM, GATTP_MAX_CHAR_VALUE_SIZE)
40 #endif
41
42 static void gatt_profile_request_cback (UINT16 conn_id, UINT32 trans_id, UINT8 op_code, tGATTS_DATA *p_data);
43 static void gatt_profile_connect_cback (tGATT_IF gatt_if, BD_ADDR bda, UINT16 conn_id, BOOLEAN connected, tGATT_DISCONN_REASON reason);
44
45 static tGATT_CBACK gatt_profile_cback =
46 {
47 gatt_profile_connect_cback,
48 NULL,
49 NULL,
50 NULL,
51 gatt_profile_request_cback,
52 NULL
53 } ;
54
55 /*******************************************************************************
56 **
57 ** Function gatt_profile_find_conn_id_by_bd_addr
58 **
59 ** Description The function searches all LCB with macthing bd address
60 **
61 ** Returns total number of clcb found.
62 **
63 *******************************************************************************/
gatt_profile_find_conn_id_by_bd_addr(BD_ADDR bda)64 UINT16 gatt_profile_find_conn_id_by_bd_addr(BD_ADDR bda)
65 {
66 UINT8 i_clcb;
67 tGATT_PROFILE_CLCB *p_clcb = NULL;
68
69 for (i_clcb = 0, p_clcb= gatt_cb.profile_clcb; i_clcb < GATT_MAX_APPS; i_clcb++, p_clcb++)
70 {
71 if (p_clcb->in_use && p_clcb->connected && !memcmp(p_clcb->bda, bda, BD_ADDR_LEN))
72 {
73 return p_clcb->conn_id;
74 }
75 }
76
77 return GATT_INVALID_CONN_ID;
78 }
79
80 /*******************************************************************************
81 **
82 ** Function gatt_profile_find_clcb_by_bd_addr
83 **
84 ** Description The function searches all LCBs with macthing bd address.
85 **
86 ** Returns Pointer to the found link conenction control block.
87 **
88 *******************************************************************************/
gatt_profile_find_clcb_by_bd_addr(BD_ADDR bda)89 tGATT_PROFILE_CLCB *gatt_profile_find_clcb_by_bd_addr(BD_ADDR bda)
90 {
91 UINT8 i_clcb;
92 tGATT_PROFILE_CLCB *p_clcb = NULL;
93
94 for (i_clcb = 0, p_clcb= gatt_cb.profile_clcb; i_clcb < GATT_MAX_APPS; i_clcb++, p_clcb++)
95 {
96 if (p_clcb->in_use && p_clcb->connected && !memcmp(p_clcb->bda, bda, BD_ADDR_LEN))
97 {
98 return p_clcb;
99 }
100 }
101
102 return p_clcb;
103 }
104
105 /*******************************************************************************
106 **
107 ** Function gatt_profile_clcb_alloc
108 **
109 ** Description The function allocates a GATT profile connection link control block
110 **
111 ** Returns NULL if not found. Otherwise pointer to the connection link block.
112 **
113 *******************************************************************************/
gatt_profile_clcb_alloc(UINT16 conn_id,BD_ADDR bda)114 tGATT_PROFILE_CLCB *gatt_profile_clcb_alloc (UINT16 conn_id, BD_ADDR bda)
115 {
116 UINT8 i_clcb = 0;
117 tGATT_PROFILE_CLCB *p_clcb = NULL;
118
119 for (i_clcb = 0, p_clcb= gatt_cb.profile_clcb; i_clcb < GATT_MAX_APPS; i_clcb++, p_clcb++)
120 {
121 if (!p_clcb->in_use)
122 {
123 p_clcb->in_use = TRUE;
124 p_clcb->conn_id = conn_id;
125 p_clcb->connected = TRUE;
126 memcpy (p_clcb->bda, bda, BD_ADDR_LEN);
127 break;
128 }
129 }
130 return p_clcb;
131 }
132 /*******************************************************************************
133 **
134 ** Function gatt_profile_clcb_dealloc
135 **
136 ** Description The function deallocates a GATT profile connection link control block
137 **
138 ** Returns NTrue the deallocation is successful
139 **
140 *******************************************************************************/
gatt_profile_clcb_dealloc(UINT16 conn_id)141 BOOLEAN gatt_profile_clcb_dealloc (UINT16 conn_id)
142 {
143 UINT8 i_clcb = 0;
144 tGATT_PROFILE_CLCB *p_clcb = NULL;
145
146 for (i_clcb = 0, p_clcb= gatt_cb.profile_clcb; i_clcb < GATT_MAX_APPS; i_clcb++, p_clcb++)
147 {
148 if (p_clcb->in_use && p_clcb->connected && (p_clcb->conn_id == conn_id))
149 {
150 memset(p_clcb, 0, sizeof(tGATT_PROFILE_CLCB));
151 return TRUE;
152 }
153 }
154 return FALSE;
155 }
156
157
158 /*******************************************************************************
159 **
160 ** Function gatt_profile_request_cback
161 **
162 ** Description GATT profile attribute access request callback.
163 **
164 ** Returns void.
165 **
166 *******************************************************************************/
gatt_profile_request_cback(UINT16 conn_id,UINT32 trans_id,tGATTS_REQ_TYPE type,tGATTS_DATA * p_data)167 static void gatt_profile_request_cback (UINT16 conn_id, UINT32 trans_id, tGATTS_REQ_TYPE type,
168 tGATTS_DATA *p_data)
169 {
170 UINT8 status = GATT_INVALID_PDU;
171 tGATTS_RSP rsp_msg ;
172 BOOLEAN ignore = FALSE;
173
174 memset(&rsp_msg, 0, sizeof(tGATTS_RSP));
175
176 switch (type)
177 {
178 case GATTS_REQ_TYPE_READ:
179 status = GATT_READ_NOT_PERMIT;
180 break;
181
182 case GATTS_REQ_TYPE_WRITE:
183 status = GATT_WRITE_NOT_PERMIT;
184 break;
185
186 case GATTS_REQ_TYPE_WRITE_EXEC:
187 case GATT_CMD_WRITE:
188 ignore = TRUE;
189 GATT_TRACE_EVENT0("Ignore GATT_REQ_EXEC_WRITE/WRITE_CMD" );
190 break;
191
192 case GATTS_REQ_TYPE_MTU:
193 GATT_TRACE_EVENT1("Get MTU exchange new mtu size: %d", p_data->mtu);
194 ignore = TRUE;
195 break;
196
197 default:
198 GATT_TRACE_EVENT1("Unknown/unexpected LE GAP ATT request: 0x%02x", type);
199 break;
200 }
201
202 if (!ignore)
203 GATTS_SendRsp (conn_id, trans_id, status, &rsp_msg);
204
205 }
206
207 /*******************************************************************************
208 **
209 ** Function gatt_profile_connect_cback
210 **
211 ** Description Gatt profile connection callback.
212 **
213 ** Returns void
214 **
215 *******************************************************************************/
gatt_profile_connect_cback(tGATT_IF gatt_if,BD_ADDR bda,UINT16 conn_id,BOOLEAN connected,tGATT_DISCONN_REASON reason)216 static void gatt_profile_connect_cback (tGATT_IF gatt_if, BD_ADDR bda, UINT16 conn_id,
217 BOOLEAN connected, tGATT_DISCONN_REASON reason)
218 {
219 GATT_TRACE_EVENT5 ("gatt_profile_connect_cback: from %08x%04x connected:%d conn_id=%d reason = 0x%04x",
220 (bda[0]<<24)+(bda[1]<<16)+(bda[2]<<8)+bda[3],
221 (bda[4]<<8)+bda[5], connected, conn_id, reason);
222
223 if (connected)
224 {
225 if (gatt_profile_clcb_alloc(conn_id, bda) == NULL)
226 {
227 GATT_TRACE_ERROR0 ("gatt_profile_connect_cback: no_resource");
228 return;
229 }
230 }
231 else
232 {
233 gatt_profile_clcb_dealloc(conn_id);
234 }
235
236 }
237
238 /*******************************************************************************
239 **
240 ** Function gatt_profile_db_init
241 **
242 ** Description Initializa the GATT profile attribute database.
243 **
244 *******************************************************************************/
gatt_profile_db_init(void)245 void gatt_profile_db_init (void)
246 {
247 tBT_UUID app_uuid = {LEN_UUID_128, {0}};
248 tBT_UUID uuid = {LEN_UUID_16, {UUID_SERVCLASS_GATT_SERVER}};
249 UINT16 service_handle = 0;
250 tGATT_STATUS status;
251
252 /* Fill our internal UUID with a fixed pattern 0x81 */
253 memset (&app_uuid.uu.uuid128, 0x81, LEN_UUID_128);
254
255
256 /* Create a GATT profile service */
257 gatt_cb.gatt_if = GATT_Register(&app_uuid, &gatt_profile_cback);
258 GATT_StartIf(gatt_cb.gatt_if);
259
260 service_handle = GATTS_CreateService (gatt_cb.gatt_if , &uuid, 0, GATTP_MAX_ATTR_NUM, TRUE);
261 /* add Service Changed characteristic
262 */
263 uuid.uu.uuid16 = gatt_cb.gattp_attr.uuid = GATT_UUID_GATT_SRV_CHGD;
264 gatt_cb.gattp_attr.service_change = 0;
265 gatt_cb.gattp_attr.handle =
266 gatt_cb.handle_of_h_r = GATTS_AddCharacteristic(service_handle, &uuid, 0, GATT_CHAR_PROP_BIT_INDICATE);
267
268 GATT_TRACE_DEBUG1 ("gatt_profile_db_init: handle of service changed%d",
269 gatt_cb.handle_of_h_r );
270
271 /* start service
272 */
273 status = GATTS_StartService (gatt_cb.gatt_if, service_handle, GATTP_TRANSPORT_SUPPORTED );
274
275 GATT_TRACE_DEBUG2 ("gatt_profile_db_init: gatt_if=%d start status%d",
276 gatt_cb.gatt_if, status);
277 }
278
279 #endif /* BLE_INCLUDED */
280