1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
|
#include <hardware/bluetooth.h>
#include <netinet/in.h>
#include <stdio.h>
#include <string.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <unistd.h>
#include "osi/include/osi.h"
typedef int (*handler_t)(int argc, char** argv);
typedef enum {
HCI_PACKET_COMMAND = 1,
HCI_PACKET_ACL_DATA = 2,
HCI_PACKET_SCO_DATA = 3,
HCI_PACKET_EVENT = 4,
} hci_packet_t;
typedef struct {
const char* name;
const char* help;
handler_t handler;
} command_t;
static int help(int argc, char** argv);
static int set_discoverable(int argc, char** argv);
static int set_name(int argc, char** argv);
static int set_pcm_loopback(int argc, char** argv);
static int set_sco_route(int argc, char** argv);
static bool write_hci_command(hci_packet_t type, const void* packet,
size_t length);
static const command_t* find_command(const char* name);
static void usage(const char* name);
static const command_t commands[] = {
{"help", "<command> - shows help text for <command>.", help},
{"setDiscoverable",
"(true|false) - whether the controller should be discoverable.",
set_discoverable},
{"setName", "<name> - sets the device's Bluetooth name to <name>.",
set_name},
{"setPcmLoopback",
"(true|false) - enables or disables PCM loopback on the controller.",
set_pcm_loopback},
{"setScoRoute",
"(pcm|i2s|uart) - sets the SCO packet route to one of the specified "
"buses.",
set_sco_route},
};
static int help(int argc, char** argv) {
if (!argc) {
printf("No help command specified.\n");
return 1;
}
const command_t* command = find_command(argv[0]);
if (!command) {
printf("No command named '%s'.\n", argv[0]);
return 2;
}
printf("%s %s\n", argv[0], command->help);
return 0;
}
static int set_discoverable(int argc, char** argv) {
if (argc != 1) {
printf("Discoverable mode not specified.\n");
return 1;
}
if (strcmp(argv[0], "true") && strcmp(argv[0], "false")) {
printf("Invalid discoverable mode '%s'.\n", argv[0]);
return 2;
}
uint8_t packet[] = {0x1A, 0x0C, 0x01, 0x00};
if (argv[0][0] == 't') packet[ARRAY_SIZE(packet) - 1] = 0x03;
return !write_hci_command(HCI_PACKET_COMMAND, packet, ARRAY_SIZE(packet));
}
static int set_name(int argc, char** argv) {
if (argc != 1) {
printf("Device name not specified.\n");
return 1;
}
size_t len = strlen(argv[0]);
if (len > 247) {
printf("Device name cannot exceed 247 bytes.\n");
return 2;
}
uint8_t packet[251] = {0x13, 0x0C, 248};
memcpy(&packet[3], argv[0], len + 1);
if (!write_hci_command(HCI_PACKET_COMMAND, packet, sizeof(packet))) return 1;
memset(&packet[0], 0, sizeof(packet));
packet[0] = 0x52;
packet[1] = 0x0C;
packet[2] = 0xF1; // HCI command packet length.
packet[3] = 0x01; // FEC required.
packet[4] = len + 1;
packet[5] = 0x09; // Device name field tag.
memcpy(&packet[6], argv[0], len);
return !write_hci_command(HCI_PACKET_COMMAND, packet, 0xF4);
}
static int set_pcm_loopback(int argc, char** argv) {
if (argc != 1) {
printf("PCM loopback mode not specified.\n");
return 1;
}
if (strcmp(argv[0], "true") && strcmp(argv[0], "false")) {
printf("Invalid PCM mode '%s'.\n", argv[0]);
return 2;
}
uint8_t packet[] = {0x24, 0xFC, 0x01, 0x00};
if (argv[0][0] == 't') packet[ARRAY_SIZE(packet) - 1] = 0x01;
return !write_hci_command(HCI_PACKET_COMMAND, packet, ARRAY_SIZE(packet));
}
static int set_sco_route(int argc, char** argv) {
if (argc != 1) {
printf("SCO route parameter must be specified.\n");
return 1;
}
uint8_t route = 0xFF;
if (!strcmp(argv[0], "pcm"))
route = 0;
else if (!strcmp(argv[0], "i2s"))
route = 3;
else if (!strcmp(argv[0], "uart"))
route = 1;
if (route == 0xFF) {
printf("Invalid SCO route specified: %s\n", argv[0]);
return 2;
}
uint8_t packet[] = {0x1C, 0xFC, 0x05, 0x00, 0x02, 0x00, 0x00, 0x00};
packet[3] = route;
return !write_hci_command(HCI_PACKET_COMMAND, packet, ARRAY_SIZE(packet));
}
int main(int argc, char** argv) {
if (argc < 2) {
usage(argv[0]);
return -1;
}
const command_t* command = find_command(argv[1]);
if (!command) {
printf("Unrecognized command '%s'.\n", argv[1]);
return -2;
}
if (!command->handler) {
printf("Unhandled command '%s'.\n", argv[1]);
return -3;
}
return command->handler(argc - 2, &argv[2]);
}
static bool write_hci_command(hci_packet_t type, const void* packet,
size_t length) {
int sock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
if (sock == INVALID_FD) goto error;
struct sockaddr_in addr;
addr.sin_family = AF_INET;
addr.sin_addr.s_addr = htonl(0x7F000001);
addr.sin_port = htons(8873);
int ret;
OSI_NO_INTR(ret = connect(sock, (const struct sockaddr*)&addr, sizeof(addr)));
if (ret == -1) goto error;
if (send(sock, &type, 1, 0) != 1) goto error;
if (send(sock, &length, 2, 0) != 2) goto error;
if (send(sock, packet, length, 0) != (ssize_t)length) goto error;
close(sock);
return true;
error:;
close(sock);
return false;
}
static const command_t* find_command(const char* name) {
for (size_t i = 0; i < ARRAY_SIZE(commands); ++i)
if (!strcmp(commands[i].name, name)) return &commands[i];
return NULL;
}
static void usage(const char* name) {
printf("Usage: %s <command> [options]\n", name);
printf("Commands:\n");
for (size_t i = 0; i < ARRAY_SIZE(commands); ++i)
printf(" %s\n", commands[i].name);
printf("For detailed help on a command, run '%s help <command>'.\n", name);
}
|
