1 /******************************************************************************
2 *
3 * Copyright (C) 2009-2012 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 is the implementation file for the MCAP Data Channel Action
22 * Functions.
23 *
24 ******************************************************************************/
25
26 #include <stddef.h>
27 #include "bt_common.h"
28 #include "bt_target.h"
29 #include "bt_utils.h"
30 #include "mca_api.h"
31 #include "mca_int.h"
32 #include "osi/include/osi.h"
33
34 /*******************************************************************************
35 *
36 * Function mca_dcb_report_cong
37 *
38 * Description This function is called to report the congestion flag.
39 *
40 * Returns void.
41 *
42 ******************************************************************************/
mca_dcb_report_cong(tMCA_DCB * p_dcb)43 void mca_dcb_report_cong(tMCA_DCB* p_dcb) {
44 tMCA_CTRL evt_data;
45
46 evt_data.cong_chg.cong = p_dcb->cong;
47 evt_data.cong_chg.mdl = mca_dcb_to_hdl(p_dcb);
48 evt_data.cong_chg.mdl_id = p_dcb->mdl_id;
49 mca_ccb_report_event(p_dcb->p_ccb, MCA_CONG_CHG_EVT, &evt_data);
50 }
51
52 /*******************************************************************************
53 *
54 * Function mca_dcb_tc_open
55 *
56 * Description This function is called to report MCA_OPEN_IND_EVT or
57 * MCA_OPEN_CFM_EVT event.
58 * It also clears the congestion flag (dcb.cong).
59 *
60 * Returns void.
61 *
62 ******************************************************************************/
mca_dcb_tc_open(tMCA_DCB * p_dcb,tMCA_DCB_EVT * p_data)63 void mca_dcb_tc_open(tMCA_DCB* p_dcb, tMCA_DCB_EVT* p_data) {
64 tMCA_CTRL evt_data;
65 tMCA_CCB* p_ccb = p_dcb->p_ccb;
66 uint8_t event = MCA_OPEN_IND_EVT;
67
68 if (p_data->open.param == MCA_INT) event = MCA_OPEN_CFM_EVT;
69 p_dcb->cong = false;
70 evt_data.open_cfm.mtu = p_data->open.peer_mtu;
71 evt_data.open_cfm.mdl_id = p_dcb->mdl_id;
72 evt_data.open_cfm.mdl = mca_dcb_to_hdl(p_dcb);
73 mca_ccb_event(p_ccb, MCA_CCB_DL_OPEN_EVT, NULL);
74 mca_ccb_report_event(p_ccb, event, &evt_data);
75 }
76
77 /*******************************************************************************
78 *
79 * Function mca_dcb_cong
80 *
81 * Description This function sets the congestion state for the DCB.
82 *
83 * Returns void.
84 *
85 ******************************************************************************/
mca_dcb_cong(tMCA_DCB * p_dcb,tMCA_DCB_EVT * p_data)86 void mca_dcb_cong(tMCA_DCB* p_dcb, tMCA_DCB_EVT* p_data) {
87 p_dcb->cong = p_data->llcong;
88 mca_dcb_report_cong(p_dcb);
89 }
90
91 /*******************************************************************************
92 *
93 * Function mca_dcb_free_data
94 *
95 * Description This function frees the received message.
96 *
97 * Returns void.
98 *
99 ******************************************************************************/
mca_dcb_free_data(UNUSED_ATTR tMCA_DCB * p_dcb,tMCA_DCB_EVT * p_data)100 void mca_dcb_free_data(UNUSED_ATTR tMCA_DCB* p_dcb, tMCA_DCB_EVT* p_data) {
101 osi_free(p_data);
102 }
103
104 /*******************************************************************************
105 *
106 * Function mca_dcb_do_disconn
107 *
108 * Description This function closes a data channel.
109 *
110 * Returns void.
111 *
112 ******************************************************************************/
mca_dcb_do_disconn(tMCA_DCB * p_dcb,UNUSED_ATTR tMCA_DCB_EVT * p_data)113 void mca_dcb_do_disconn(tMCA_DCB* p_dcb, UNUSED_ATTR tMCA_DCB_EVT* p_data) {
114 tMCA_CLOSE close;
115
116 if ((p_dcb->lcid == 0) || (L2CA_DisconnectReq(p_dcb->lcid) == false)) {
117 close.param = MCA_INT;
118 close.reason = L2CAP_DISC_OK;
119 close.lcid = 0;
120 mca_dcb_event(p_dcb, MCA_DCB_TC_CLOSE_EVT, (tMCA_DCB_EVT*)&close);
121 }
122 }
123
124 /*******************************************************************************
125 *
126 * Function mca_dcb_snd_data
127 *
128 * Description Send the data from application to the peer device.
129 *
130 * Returns void.
131 *
132 ******************************************************************************/
mca_dcb_snd_data(tMCA_DCB * p_dcb,tMCA_DCB_EVT * p_data)133 void mca_dcb_snd_data(tMCA_DCB* p_dcb, tMCA_DCB_EVT* p_data) {
134 uint8_t status;
135
136 /* do not need to check cong, because API already checked the status */
137 status = L2CA_DataWrite(p_dcb->lcid, p_data->p_pkt);
138 if (status == L2CAP_DW_CONGESTED) {
139 p_dcb->cong = true;
140 mca_dcb_report_cong(p_dcb);
141 }
142 }
143
144 /*******************************************************************************
145 *
146 * Function mca_dcb_hdl_data
147 *
148 * Description This function reports the received data through the data
149 * callback function.
150 *
151 * Returns void.
152 *
153 ******************************************************************************/
mca_dcb_hdl_data(tMCA_DCB * p_dcb,tMCA_DCB_EVT * p_data)154 void mca_dcb_hdl_data(tMCA_DCB* p_dcb, tMCA_DCB_EVT* p_data) {
155 (*p_dcb->p_cs->p_data_cback)(mca_dcb_to_hdl(p_dcb), (BT_HDR*)p_data);
156 }
157