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