1 /******************************************************************************
2 *
3 * Copyright (C) 2003-2012 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 module contains functions which operate on the AVCTP connection
22 * control block.
23 *
24 ******************************************************************************/
25
26 #include <string.h>
27 #include "bt_types.h"
28 #include "bt_target.h"
29 #include "avct_api.h"
30 #include "avct_int.h"
31
32 /*******************************************************************************
33 **
34 ** Function avct_ccb_alloc
35 **
36 ** Description Allocate a connection control block; copy parameters to ccb.
37 **
38 **
39 ** Returns pointer to the ccb, or NULL if none could be allocated.
40 **
41 *******************************************************************************/
avct_ccb_alloc(tAVCT_CC * p_cc)42 tAVCT_CCB *avct_ccb_alloc(tAVCT_CC *p_cc)
43 {
44 tAVCT_CCB *p_ccb = &avct_cb.ccb[0];
45 int i;
46
47 for (i = 0; i < AVCT_NUM_CONN; i++, p_ccb++)
48 {
49 if (!p_ccb->allocated)
50 {
51 p_ccb->allocated = AVCT_ALOC_LCB;
52 memcpy(&p_ccb->cc, p_cc, sizeof(tAVCT_CC));
53 AVCT_TRACE_DEBUG("avct_ccb_alloc %d", i);
54 break;
55 }
56 }
57
58 if (i == AVCT_NUM_CONN)
59 {
60 /* out of ccbs */
61 p_ccb = NULL;
62 AVCT_TRACE_WARNING("Out of ccbs");
63 }
64 return p_ccb;
65 }
66
67 /*******************************************************************************
68 **
69 ** Function avct_ccb_dealloc
70 **
71 ** Description Deallocate a connection control block and call application
72 ** callback.
73 **
74 **
75 ** Returns void.
76 **
77 *******************************************************************************/
avct_ccb_dealloc(tAVCT_CCB * p_ccb,UINT8 event,UINT16 result,BD_ADDR bd_addr)78 void avct_ccb_dealloc(tAVCT_CCB *p_ccb, UINT8 event, UINT16 result, BD_ADDR bd_addr)
79 {
80 tAVCT_CTRL_CBACK *p_cback = p_ccb->cc.p_ctrl_cback;
81
82 AVCT_TRACE_DEBUG("avct_ccb_dealloc %d", avct_ccb_to_idx(p_ccb));
83 #if (AVCT_BROWSE_INCLUDED == TRUE)
84 if(p_ccb->p_bcb == NULL)
85 memset(p_ccb, 0, sizeof(tAVCT_CCB));
86 else
87 {
88 /* control channel is down, but the browsing channel is still connected 0 disconnect it now */
89 avct_bcb_event(p_ccb->p_bcb, AVCT_LCB_UL_UNBIND_EVT, (tAVCT_LCB_EVT *) &p_ccb);
90 p_ccb->p_lcb = NULL;
91 }
92 #else
93 memset(p_ccb, 0, sizeof(tAVCT_CCB));
94 #endif
95
96 if (event != AVCT_NO_EVT)
97 {
98 (*p_cback)(avct_ccb_to_idx(p_ccb), event, result, bd_addr);
99 }
100 }
101
102 /*******************************************************************************
103 **
104 ** Function avct_ccb_to_idx
105 **
106 ** Description Given a pointer to an ccb, return its index.
107 **
108 **
109 ** Returns Index of ccb.
110 **
111 *******************************************************************************/
avct_ccb_to_idx(tAVCT_CCB * p_ccb)112 UINT8 avct_ccb_to_idx(tAVCT_CCB *p_ccb)
113 {
114 /* use array arithmetic to determine index */
115 return (UINT8) (p_ccb - avct_cb.ccb);
116 }
117
118 /*******************************************************************************
119 **
120 ** Function avct_ccb_by_idx
121 **
122 ** Description Return ccb pointer based on ccb index (or handle).
123 **
124 **
125 ** Returns pointer to the ccb, or NULL if none found.
126 **
127 *******************************************************************************/
avct_ccb_by_idx(UINT8 idx)128 tAVCT_CCB *avct_ccb_by_idx(UINT8 idx)
129 {
130 tAVCT_CCB *p_ccb;
131
132 /* verify index */
133 if (idx < AVCT_NUM_CONN)
134 {
135 p_ccb = &avct_cb.ccb[idx];
136
137 /* verify ccb is allocated */
138 if (!p_ccb->allocated)
139 {
140 p_ccb = NULL;
141 AVCT_TRACE_WARNING("ccb %d not allocated", idx);
142 }
143 }
144 else
145 {
146 p_ccb = NULL;
147 AVCT_TRACE_WARNING("No ccb for idx %d", idx);
148 }
149 return p_ccb;
150 }
151