1 /******************************************************************************
2 *
3 * Copyright (C) 2010-2014 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 LLCP entry points
22 *
23 ******************************************************************************/
24
25 #include <string.h>
26
27 #include <android-base/stringprintf.h>
28 #include <base/logging.h>
29
30 #include "bt_types.h"
31 #include "gki.h"
32 #include "llcp_api.h"
33 #include "llcp_int.h"
34 #include "nfc_int.h"
35
36 using android::base::StringPrintf;
37
38 extern bool nfc_debug_enabled;
39
40 tLLCP_CB llcp_cb;
41
42 /*******************************************************************************
43 **
44 ** Function llcp_init
45 **
46 ** Description This function is called once at startup to initialize
47 ** all the LLCP structures
48 **
49 ** Returns void
50 **
51 *******************************************************************************/
llcp_init(void)52 void llcp_init(void) {
53 uint32_t pool_count;
54
55 memset(&llcp_cb, 0, sizeof(tLLCP_CB));
56
57 DLOG_IF(INFO, nfc_debug_enabled) << __func__;
58
59 llcp_cb.lcb.local_link_miu =
60 (LLCP_MIU <= LLCP_MAX_MIU ? LLCP_MIU : LLCP_MAX_MIU);
61 llcp_cb.lcb.local_opt = LLCP_OPT_VALUE;
62 llcp_cb.lcb.local_wt = LLCP_WAITING_TIME;
63 llcp_cb.lcb.local_lto = LLCP_LTO_VALUE;
64
65 llcp_cb.lcb.inact_timeout_init = LLCP_INIT_INACTIVITY_TIMEOUT;
66 llcp_cb.lcb.inact_timeout_target = LLCP_TARGET_INACTIVITY_TIMEOUT;
67 llcp_cb.lcb.symm_delay = LLCP_DELAY_RESP_TIME;
68 llcp_cb.lcb.data_link_timeout = LLCP_DATA_LINK_CONNECTION_TOUT;
69 llcp_cb.lcb.delay_first_pdu_timeout = LLCP_DELAY_TIME_TO_SEND_FIRST_PDU;
70
71 llcp_cb.lcb.wks = LLCP_WKS_MASK_LM;
72
73 /* total number of buffers for LLCP */
74 pool_count = GKI_poolcount(LLCP_POOL_ID);
75
76 /* number of buffers for receiving data */
77 llcp_cb.num_rx_buff = (pool_count * LLCP_RX_BUFF_RATIO) / 100;
78
79 /* rx congestion start/end threshold */
80 llcp_cb.overall_rx_congest_start =
81 (uint8_t)((llcp_cb.num_rx_buff * LLCP_RX_CONGEST_START) / 100);
82 llcp_cb.overall_rx_congest_end =
83 (uint8_t)((llcp_cb.num_rx_buff * LLCP_RX_CONGEST_END) / 100);
84
85 /* max number of buffers for receiving data on logical data link */
86 llcp_cb.max_num_ll_rx_buff =
87 (uint8_t)((llcp_cb.num_rx_buff * LLCP_LL_RX_BUFF_LIMIT) / 100);
88
89 DLOG_IF(INFO, nfc_debug_enabled) << StringPrintf(
90 "num_rx_buff = %d, rx_congest_start = %d, rx_congest_end = %d, "
91 "max_num_ll_rx_buff = %d",
92 llcp_cb.num_rx_buff, llcp_cb.overall_rx_congest_start,
93 llcp_cb.overall_rx_congest_end, llcp_cb.max_num_ll_rx_buff);
94
95 /* max number of buffers for transmitting data */
96 llcp_cb.max_num_tx_buff = (uint8_t)(pool_count - llcp_cb.num_rx_buff);
97
98 /* max number of buffers for transmitting data on logical data link */
99 llcp_cb.max_num_ll_tx_buff =
100 (uint8_t)((llcp_cb.max_num_tx_buff * LLCP_LL_TX_BUFF_LIMIT) / 100);
101
102 DLOG_IF(INFO, nfc_debug_enabled)
103 << StringPrintf("max_num_tx_buff = %d, max_num_ll_tx_buff = %d",
104 llcp_cb.max_num_tx_buff, llcp_cb.max_num_ll_tx_buff);
105
106 llcp_cb.ll_tx_uncongest_ntf_start_sap = LLCP_SAP_SDP + 1;
107
108 LLCP_RegisterServer(LLCP_SAP_SDP, LLCP_LINK_TYPE_DATA_LINK_CONNECTION,
109 "urn:nfc:sn:sdp", llcp_sdp_proc_data);
110 }
111
112 /*******************************************************************************
113 **
114 ** Function llcp_cleanup
115 **
116 ** Description This function is called once at closing to clean up
117 **
118 ** Returns void
119 **
120 *******************************************************************************/
llcp_cleanup(void)121 void llcp_cleanup(void) {
122 uint8_t sap;
123 tLLCP_APP_CB* p_app_cb;
124
125 DLOG_IF(INFO, nfc_debug_enabled) << __func__;
126
127 for (sap = LLCP_SAP_SDP; sap < LLCP_NUM_SAPS; sap++) {
128 p_app_cb = llcp_util_get_app_cb(sap);
129
130 if ((p_app_cb) && (p_app_cb->p_app_cback)) {
131 LLCP_Deregister(sap);
132 }
133 }
134
135 nfc_stop_quick_timer(&llcp_cb.lcb.inact_timer);
136 nfc_stop_quick_timer(&llcp_cb.lcb.timer);
137 }
138
139 /*******************************************************************************
140 **
141 ** Function llcp_process_timeout
142 **
143 ** Description This function is called when an LLCP-related timeout occurs
144 **
145 ** Returns void
146 **
147 *******************************************************************************/
llcp_process_timeout(TIMER_LIST_ENT * p_tle)148 void llcp_process_timeout(TIMER_LIST_ENT* p_tle) {
149 uint8_t reason;
150
151 DLOG_IF(INFO, nfc_debug_enabled)
152 << StringPrintf("llcp_process_timeout: event=%d", p_tle->event);
153
154 switch (p_tle->event) {
155 case NFC_TTYPE_LLCP_LINK_MANAGER:
156 /* Link timeout or Symm timeout */
157 llcp_link_process_link_timeout();
158 break;
159
160 case NFC_TTYPE_LLCP_LINK_INACT:
161 /* inactivity timeout */
162 llcp_link_deactivate(LLCP_LINK_LOCAL_INITIATED);
163 break;
164
165 case NFC_TTYPE_LLCP_DATA_LINK:
166 reason = LLCP_SAP_DISCONNECT_REASON_TIMEOUT;
167 llcp_dlsm_execute((tLLCP_DLCB*)(p_tle->param), LLCP_DLC_EVENT_TIMEOUT,
168 &reason);
169 break;
170
171 case NFC_TTYPE_LLCP_DELAY_FIRST_PDU:
172 llcp_link_check_send_data();
173 break;
174
175 default:
176 break;
177 }
178 }
179