1 /******************************************************************************
2 *
3 * Copyright 2004-2012 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 data gateway call-in functions.
22 *
23 ******************************************************************************/
24
25 #include "bt_target.h" // Must be first to define build configuration
26 #include "bta/pan/bta_pan_int.h"
27 #include "osi/include/allocator.h"
28 #include "stack/include/bt_hdr.h"
29 #include "stack/include/btu.h"
30 #include "types/raw_address.h"
31
32 void bta_pan_sm_execute(tBTA_PAN_SCB* p_scb, uint16_t event,
33 tBTA_PAN_DATA* p_data);
34
35 /*******************************************************************************
36 *
37 * Function bta_pan_ci_tx_ready
38 *
39 * Description This function sends an event to PAN indicating the phone is
40 * ready for more data and PAN should call
41 * bta_pan_co_tx_path().
42 * This function is used when the TX data path is configured
43 * to use a pull interface.
44 *
45 *
46 * Returns void
47 *
48 ******************************************************************************/
bta_pan_ci_tx_ready(uint16_t handle)49 void bta_pan_ci_tx_ready(uint16_t handle) {
50 BT_HDR* p_buf = (BT_HDR*)osi_malloc(sizeof(BT_HDR));
51
52 p_buf->layer_specific = handle;
53 p_buf->event = BTA_PAN_CI_TX_READY_EVT;
54
55 bta_sys_sendmsg(p_buf);
56 }
57
58 /*******************************************************************************
59 *
60 * Function bta_pan_ci_rx_ready
61 *
62 * Description This function sends an event to PAN indicating the phone
63 * has data available to send to PAN and PAN should call
64 * bta_pan_co_rx_path(). This function is used when the RX
65 * data path is configured to use a pull interface.
66 *
67 *
68 * Returns void
69 *
70 ******************************************************************************/
bta_pan_ci_rx_ready(uint16_t handle)71 void bta_pan_ci_rx_ready(uint16_t handle) {
72 BT_HDR_RIGID* p_buf = (BT_HDR_RIGID*)osi_malloc(sizeof(BT_HDR_RIGID));
73
74 p_buf->layer_specific = handle;
75 p_buf->event = BTA_PAN_CI_RX_READY_EVT;
76
77 bta_sys_sendmsg(p_buf);
78 }
79
80 /*******************************************************************************
81 *
82 * Function bta_pan_ci_tx_flow
83 *
84 * Description This function is called to enable or disable data flow on
85 * the TX path. The phone should call this function to
86 * disable data flow when it is congested and cannot handle
87 * any more data sent by bta_pan_co_tx_write().
88 * This function is used when the
89 * TX data path is configured to use a push interface.
90 *
91 *
92 * Returns void
93 *
94 ******************************************************************************/
bta_pan_ci_tx_flow(uint16_t handle,bool enable)95 void bta_pan_ci_tx_flow(uint16_t handle, bool enable) {
96 tBTA_PAN_CI_TX_FLOW* p_buf =
97 (tBTA_PAN_CI_TX_FLOW*)osi_malloc(sizeof(tBTA_PAN_CI_TX_FLOW));
98
99 p_buf->hdr.layer_specific = handle;
100 p_buf->hdr.event = BTA_PAN_CI_TX_FLOW_EVT;
101 p_buf->enable = enable;
102
103 bta_sys_sendmsg(p_buf);
104 }
105
106 /*******************************************************************************
107 *
108 * Function bta_pan_ci_rx_write
109 *
110 * Description This function is called to send data to PAN when the RX path
111 * is configured to use a push interface. The function copies
112 * data to an event buffer and sends it to PAN.
113 *
114 *
115 * Returns void
116 *
117 ******************************************************************************/
bta_pan_ci_rx_write(uint16_t handle,const RawAddress & dst,const RawAddress & src,uint16_t protocol,uint8_t * p_data,uint16_t len,bool ext)118 void bta_pan_ci_rx_write(uint16_t handle, const RawAddress& dst,
119 const RawAddress& src, uint16_t protocol,
120 uint8_t* p_data, uint16_t len, bool ext) {
121 BT_HDR* p_buf = (BT_HDR*)osi_malloc(PAN_BUF_SIZE);
122
123 p_buf->offset = PAN_MINIMUM_OFFSET;
124
125 /* copy all other params before the data */
126 ((tBTA_PAN_DATA_PARAMS*)p_buf)->src = src;
127 ((tBTA_PAN_DATA_PARAMS*)p_buf)->dst = dst;
128 ((tBTA_PAN_DATA_PARAMS*)p_buf)->protocol = protocol;
129 ((tBTA_PAN_DATA_PARAMS*)p_buf)->ext = ext;
130 p_buf->len = len;
131
132 /* copy data */
133 memcpy((uint8_t*)(p_buf + 1) + p_buf->offset, p_data, len);
134
135 p_buf->layer_specific = handle;
136 p_buf->event = BTA_PAN_CI_RX_WRITEBUF_EVT;
137
138 bta_sys_sendmsg(p_buf);
139 }
140
141 /*******************************************************************************
142 *
143 * Function bta_pan_ci_rx_writebuf
144 *
145 * Description This function is called to send data to the phone when
146 * the RX path is configured to use a push interface with
147 * zero copy. The function sends an event to PAN containing
148 * the data buffer. The buffer will be freed by BTA; the
149 * phone must not free the buffer.
150 *
151 *
152 * Returns void
153 *
154 ******************************************************************************/
bta_pan_ci_rx_writebuf(uint16_t handle,const RawAddress & dst,const RawAddress & src,uint16_t protocol,BT_HDR * p_buf,bool ext)155 void bta_pan_ci_rx_writebuf(uint16_t handle, const RawAddress& dst,
156 const RawAddress& src, uint16_t protocol,
157 BT_HDR* p_buf, bool ext) {
158 /* copy all other params before the data */
159 ((tBTA_PAN_DATA_PARAMS*)p_buf)->src = src;
160 ((tBTA_PAN_DATA_PARAMS*)p_buf)->dst = dst;
161 ((tBTA_PAN_DATA_PARAMS*)p_buf)->protocol = protocol;
162 ((tBTA_PAN_DATA_PARAMS*)p_buf)->ext = ext;
163
164 p_buf->layer_specific = handle;
165 p_buf->event = BTA_PAN_CI_RX_WRITEBUF_EVT;
166 bta_sys_sendmsg(p_buf);
167 }
168
169 /*******************************************************************************
170 *
171 * Function bta_pan_ci_readbuf
172 *
173 * Description
174 *
175 *
176 * Returns void
177 *
178 ******************************************************************************/
bta_pan_ci_readbuf(uint16_t handle,RawAddress & src,RawAddress & dst,uint16_t * p_protocol,bool * p_ext,bool * p_forward)179 BT_HDR* bta_pan_ci_readbuf(uint16_t handle, RawAddress& src, RawAddress& dst,
180 uint16_t* p_protocol, bool* p_ext, bool* p_forward) {
181 tBTA_PAN_SCB* p_scb = bta_pan_scb_by_handle(handle);
182 BT_HDR* p_buf;
183
184 if (p_scb == NULL) return NULL;
185
186 p_buf = (BT_HDR*)fixed_queue_try_dequeue(p_scb->data_queue);
187 if (p_buf != NULL) {
188 src = ((tBTA_PAN_DATA_PARAMS*)p_buf)->src;
189 dst = ((tBTA_PAN_DATA_PARAMS*)p_buf)->dst;
190 *p_protocol = ((tBTA_PAN_DATA_PARAMS*)p_buf)->protocol;
191 *p_ext = ((tBTA_PAN_DATA_PARAMS*)p_buf)->ext;
192 *p_forward = ((tBTA_PAN_DATA_PARAMS*)p_buf)->forward;
193 }
194
195 return p_buf;
196 }
197