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 MATTHIAS 24 * RINGWALD 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__ "inquiry.c" 39 40 /* 41 * inquiry.c 42 * 43 * basic inquiry scan with remote name lookup 44 */ 45 46 #include <unistd.h> 47 #include <stdio.h> 48 #include <stdlib.h> 49 #include <string.h> 50 51 #include "btstack_client.h" 52 #include "btstack_run_loop_posix.h" 53 54 #define MAX_DEVICES 10 55 struct device { 56 bd_addr_t address; 57 uint16_t clockOffset; 58 uint32_t classOfDevice; 59 uint8_t pageScanRepetitionMode; 60 uint8_t rssi; 61 uint8_t state; // 0 empty, 1 found, 2 remote name tried, 3 remote name found 62 }; 63 64 #define INQUIRY_INTERVAL 5 65 struct device devices[MAX_DEVICES]; 66 int deviceCount = 0; 67 68 enum STATE {INIT, W4_INQUIRY_MODE_COMPLETE, ACTIVE, DEVICE_NAME, REMOTE_NAME_REQUEST, REMOTE_NAME_INQUIRED, REMOTE_NAME_FETCHED} ; 69 enum STATE state = INIT; 70 71 int getDeviceIndexForAddress( bd_addr_t addr){ 72 int j; 73 for (j=0; j< deviceCount; j++){ 74 if (bd_addr_cmp(addr, devices[j].address) == 0){ 75 return j; 76 } 77 } 78 return -1; 79 } 80 81 void start_scan(void){ 82 printf("Starting inquiry scan..\n"); 83 bt_send_cmd(&hci_inquiry, HCI_INQUIRY_LAP, INQUIRY_INTERVAL, 0); 84 } 85 86 int has_more_remote_name_requests(void){ 87 int i; 88 for (i=0;i<deviceCount;i++) { 89 if (devices[i].state == REMOTE_NAME_REQUEST) return 1; 90 } 91 return 0; 92 } 93 94 void do_next_remote_name_request(void){ 95 int i; 96 for (i=0;i<deviceCount;i++) { 97 // remote name request 98 if (devices[i].state == REMOTE_NAME_REQUEST){ 99 devices[i].state = REMOTE_NAME_INQUIRED; 100 printf("Get remote name of %s...\n", bd_addr_to_str(devices[i].address)); 101 bt_send_cmd(&hci_remote_name_request, devices[i].address, 102 devices[i].pageScanRepetitionMode, 0, devices[i].clockOffset | 0x8000); 103 return; 104 } 105 } 106 } 107 108 109 static void packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 110 //static void packet_handler (uint8_t packet_type, uint8_t *packet, uint16_t size){ 111 bd_addr_t addr; 112 int i; 113 int index; 114 int numResponses; 115 116 // printf("packet_handler: pt: 0x%02x, packet[0]: 0x%02x\n", packet_type, packet[0]); 117 if (packet_type != HCI_EVENT_PACKET) return; 118 119 uint8_t event = hci_event_packet_get_type(packet); 120 121 switch(state){ 122 123 case INIT: 124 if (btstack_event_state_get_state(packet) == HCI_STATE_WORKING){ 125 bt_send_cmd(&hci_write_inquiry_mode, 0x01); // with RSSI 126 state = W4_INQUIRY_MODE_COMPLETE; 127 } 128 break; 129 130 case W4_INQUIRY_MODE_COMPLETE: 131 switch(event){ 132 case HCI_EVENT_COMMAND_COMPLETE: 133 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_inquiry_mode)) { 134 start_scan(); 135 state = ACTIVE; 136 } 137 break; 138 case HCI_EVENT_COMMAND_STATUS: 139 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_write_inquiry_mode)) { 140 printf("Ignoring error (0x%x) from hci_write_inquiry_mode.\n", packet[2]); 141 start_scan(); 142 state = ACTIVE; 143 } 144 break; 145 default: 146 break; 147 } 148 149 break; 150 151 case ACTIVE: 152 switch(event){ 153 case HCI_EVENT_INQUIRY_RESULT: 154 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI:{ 155 numResponses = hci_event_inquiry_result_get_num_responses(packet); 156 int offset = 3; 157 for (i=0; i<numResponses && deviceCount < MAX_DEVICES;i++){ 158 reverse_bd_addr(&packet[offset], addr); 159 offset += 6; 160 index = getDeviceIndexForAddress(addr); 161 if (index >= 0) continue; // already in our list 162 memcpy(devices[deviceCount].address, addr, 6); 163 164 devices[deviceCount].pageScanRepetitionMode = packet[offset]; 165 offset += 1; 166 167 if (event == HCI_EVENT_INQUIRY_RESULT){ 168 offset += 2; // Reserved + Reserved 169 devices[deviceCount].classOfDevice = little_endian_read_24(packet, offset); 170 offset += 3; 171 devices[deviceCount].clockOffset = little_endian_read_16(packet, offset) & 0x7fff; 172 offset += 2; 173 devices[deviceCount].rssi = 0; 174 } else { 175 offset += 1; // Reserved 176 devices[deviceCount].classOfDevice = little_endian_read_24(packet, offset); 177 offset += 3; 178 devices[deviceCount].clockOffset = little_endian_read_16(packet, offset) & 0x7fff; 179 offset += 2; 180 devices[deviceCount].rssi = packet[offset]; 181 offset += 1; 182 } 183 devices[deviceCount].state = REMOTE_NAME_REQUEST; 184 printf("Device found: %s with COD: 0x%06x, pageScan %d, clock offset 0x%04x, rssi 0x%02x\n", bd_addr_to_str(addr), 185 devices[deviceCount].classOfDevice, devices[deviceCount].pageScanRepetitionMode, 186 devices[deviceCount].clockOffset, devices[deviceCount].rssi); 187 deviceCount++; 188 } 189 190 break; 191 } 192 193 case HCI_EVENT_INQUIRY_COMPLETE: 194 for (i=0;i<deviceCount;i++) { 195 // retry remote name request 196 if (devices[i].state == REMOTE_NAME_INQUIRED) 197 devices[i].state = REMOTE_NAME_REQUEST; 198 } 199 if (has_more_remote_name_requests()){ 200 do_next_remote_name_request(); 201 break; 202 } 203 start_scan(); 204 break; 205 206 case DAEMON_EVENT_REMOTE_NAME_CACHED: 207 reverse_bd_addr(&packet[3], addr); 208 printf("Cached remote name for %s: '%s'\n", bd_addr_to_str(addr), &packet[9]); 209 break; 210 211 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 212 reverse_bd_addr(&packet[3], addr); 213 index = getDeviceIndexForAddress(addr); 214 if (index >= 0) { 215 if (packet[2] == 0) { 216 printf("Name: '%s'\n", &packet[9]); 217 devices[index].state = REMOTE_NAME_FETCHED; 218 } else { 219 printf("Failed to get name: page timeout\n"); 220 } 221 } 222 if (has_more_remote_name_requests()){ 223 do_next_remote_name_request(); 224 break; 225 } 226 start_scan(); 227 break; 228 229 default: 230 break; 231 } 232 break; 233 234 default: 235 break; 236 } 237 } 238 239 int main (int argc, const char * argv[]){ 240 // start stack 241 btstack_run_loop_init(btstack_run_loop_posix_get_instance()); 242 int err = bt_open(); 243 if (err) { 244 printf("Failed to open connection to BTdaemon\n"); 245 return err; 246 } 247 // init table 248 int i; for (i=0;i<MAX_DEVICES;i++) devices[i].state = 0; 249 250 bt_register_packet_handler(packet_handler); 251 bt_send_cmd(&btstack_set_power_mode, HCI_POWER_ON ); 252 btstack_run_loop_execute(); 253 bt_close(); 254 return 0; 255 } 256