1 /*
2 * Copyright (C) 2014 BlueKitchen GmbH
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 *
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. Neither the name of the copyright holders nor the names of
14 * contributors may be used to endorse or promote products derived
15 * from this software without specific prior written permission.
16 * 4. Any redistribution, use, or modification is done solely for
17 * personal benefit and not for any commercial purpose or for
18 * monetary gain.
19 *
20 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS
21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL BLUEKITCHEN
24 * GMBH OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 *
33 * Please inquire about commercial licensing options at
34 * [email protected]
35 *
36 */
37
38 #define BTSTACK_FILE__ "btstack.c"
39
40 /*
41 * btstack.c
42 *
43 * Created by Matthias Ringwald on 7/1/09.
44 *
45 * BTstack client API
46 */
47
48 #include "btstack.h"
49
50 #include "l2cap.h"
51 #include "socket_connection.h"
52 #include "btstack_run_loop.h"
53 #include "btstack_client.h"
54
55 #include <string.h>
56 #include <unistd.h>
57 #include <stdarg.h>
58 #include <stdio.h>
59
60 // static uint8_t hci_cmd_buffer[3+255]; // HCI Command Header + max payload
61 static uint8_t hci_cmd_buffer[HCI_ACL_BUFFER_SIZE]; // BTstack command packets are not size restricted
62
63 static connection_t *btstack_connection = NULL;
64
65 /** prototypes & dummy functions */
dummy_handler(uint8_t packet_type,uint16_t channel,uint8_t * packet,uint16_t size)66 static void dummy_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){};
67
68 /** local globals :) */
69 static void (*client_packet_handler)(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size) = dummy_handler;
70
71 static const char * daemon_tcp_address = NULL;
72 static uint16_t daemon_tcp_port = BTSTACK_PORT;
73
74 // optional: if called before bt_open, TCP socket is used instead of local unix socket
75 // note: address is not copied and must be valid during bt_open
bt_use_tcp(const char * address,uint16_t port)76 void bt_use_tcp(const char * address, uint16_t port){
77 daemon_tcp_address = address;
78 daemon_tcp_port = port;
79 }
80
socket_packet_handler(connection_t * connection,uint16_t packet_type,uint16_t channel,uint8_t * data,uint16_t size)81 static int socket_packet_handler(connection_t *connection, uint16_t packet_type, uint16_t channel, uint8_t *data, uint16_t size){
82 // log_info("BTstack client handler: packet type %u, data[0] %x", packet_type, data[0]);
83 (*client_packet_handler)(packet_type, channel, data, size);
84 return 0;
85 }
86
87 // init BTstack library
bt_open(void)88 int bt_open(void){
89
90 #ifndef HAVE_UNIX_SOCKETS
91 // without unix sockets, default to TCP
92 if (!daemon_tcp_address){
93 daemon_tcp_address = "127.0.0.1";
94 }
95 if (!daemon_tcp_port){
96 daemon_tcp_port = BTSTACK_PORT;
97 }
98 #endif
99
100 socket_connection_init();
101
102 socket_connection_register_packet_callback(socket_packet_handler);
103
104 // BTdaemon
105 if (daemon_tcp_address) {
106 btstack_connection = socket_connection_open_tcp(daemon_tcp_address,daemon_tcp_port);
107 } else {
108 #ifdef HAVE_UNIX_SOCKETS
109 btstack_connection = socket_connection_open_unix();
110 #endif
111 }
112 if (!btstack_connection) return -1;
113
114 return 0;
115 }
116
117 // stop using BTstack library
bt_close(void)118 int bt_close(void){
119 return socket_connection_close_tcp(btstack_connection);
120 }
121
122 // send hci cmd packet
bt_send_cmd(const hci_cmd_t * cmd,...)123 int bt_send_cmd(const hci_cmd_t *cmd, ...){
124 va_list argptr;
125 va_start(argptr, cmd);
126 uint16_t len = hci_cmd_create_from_template(hci_cmd_buffer, cmd, argptr);
127 va_end(argptr);
128 socket_connection_send_packet(btstack_connection, HCI_COMMAND_DATA_PACKET, 0, hci_cmd_buffer, len);
129 return 0;
130 }
131
132 // register packet handler
bt_register_packet_handler(btstack_packet_handler_t handler)133 btstack_packet_handler_t bt_register_packet_handler(btstack_packet_handler_t handler){
134 btstack_packet_handler_t old_handler = client_packet_handler;
135 client_packet_handler = handler;
136 return old_handler;
137 }
138
bt_send_l2cap(uint16_t source_cid,uint8_t * data,uint16_t len)139 void bt_send_l2cap(uint16_t source_cid, uint8_t *data, uint16_t len){
140 // send
141 socket_connection_send_packet(btstack_connection, L2CAP_DATA_PACKET, source_cid, data, len);
142 }
143
bt_send_rfcomm(uint16_t rfcomm_cid,uint8_t * data,uint16_t len)144 void bt_send_rfcomm(uint16_t rfcomm_cid, uint8_t *data, uint16_t len){
145 // send
146 socket_connection_send_packet(btstack_connection, RFCOMM_DATA_PACKET, rfcomm_cid, data, len);
147 }
148
bt_send_acl(uint8_t * data,uint16_t len)149 void bt_send_acl(uint8_t * data, uint16_t len){
150 // send
151 socket_connection_send_packet(btstack_connection, HCI_ACL_DATA_PACKET, 0, data, len);
152 }
153