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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