/* * Copyright (C) 2014 BlueKitchen GmbH * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the copyright holders nor the names of * contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * 4. Any redistribution, use, or modification is done solely for * personal benefit and not for any commercial purpose or for * monetary gain. * * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * Please inquire about commercial licensing options at * contact@bluekitchen-gmbh.com * */ #define __BTSTACK_FILE__ "sdp_general_query.c" // ***************************************************************************** /* EXAMPLE_START(sdp_general_query): Dump remote SDP Records * * @text The example shows how the SDP Client is used to get a list of * service records on a remote device. */ // ***************************************************************************** #include "btstack_config.h" #include #include #include #include #include "btstack.h" #ifndef HAVE_POSIX_FILE_IO // Jambox static const char * remote_addr_string = "00:21:3C:AC:F7:38"; // Mac static const char * remote_addr_string = "F0:18:98:60:3E:E5"; // iPhone 5S: static const char * remote_addr_string = "6C:72:E7:10:22:EE"; #endif static bd_addr_t remote_addr; static int record_id = -1; static uint8_t attribute_value[1000]; static const int attribute_value_buffer_size = sizeof(attribute_value); static btstack_packet_callback_registration_t hci_event_callback_registration; /* @section SDP Client Setup * * @text SDP is based on L2CAP. To receive SDP query events you must register a * callback, i.e. query handler, with the SPD parser, as shown in * Listing SDPClientInit. Via this handler, the SDP client will receive the following events: * - SDP_EVENT_QUERY_ATTRIBUTE_VALUE containing the results of the query in chunks, * - SDP_EVENT_QUERY_COMPLETE indicating the end of the query and the status */ /* LISTING_START(SDPClientInit): SDP client setup */ static void packet_handler (uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); static void handle_sdp_client_query_result(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); static void sdp_client_init(void){ // init L2CAP l2cap_init(); // register for HCI events hci_event_callback_registration.callback = &packet_handler; hci_add_event_handler(&hci_event_callback_registration); } /* LISTING_END */ /* @section SDP Client Query * * @text To trigger an SDP query to get the a list of service records on a remote device, * you need to call sdp_client_query_uuid16() with the remote address and the * UUID of the public browse group, as shown in Listing SDPQueryUUID. * In this example we used fixed address of the remote device shown in Listing Remote. * Please update it with the address of a device in your vicinity, e.g., one reported * by the GAP Inquiry example in the previous section. */ /* LISTING_START(SDPQueryUUID): Querying a list of service records on a remote device. */ static void packet_handler (uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ UNUSED(channel); UNUSED(size); if (packet_type != HCI_EVENT_PACKET) return; uint8_t event = hci_event_packet_get_type(packet); switch (event) { case BTSTACK_EVENT_STATE: // BTstack activated, get started if (btstack_event_state_get_state(packet) == HCI_STATE_WORKING){ printf("Connecting to %s\n", bd_addr_to_str(remote_addr)); sdp_client_query_uuid16(&handle_sdp_client_query_result, remote_addr, BLUETOOTH_PROTOCOL_L2CAP); } break; default: break; } } /* LISTING_END */ static void assertBuffer(int size){ if (size > attribute_value_buffer_size){ printf("SDP attribute value buffer size exceeded: available %d, required %d", attribute_value_buffer_size, size); } } /* @section Handling SDP Client Query Results * * @text The SDP Client returns the results of the query in chunks. Each result * packet contains the record ID, the Attribute ID, and a chunk of the Attribute * value. * In this example, we append new chunks for the same Attribute ID in a large buffer, * see Listing HandleSDPQUeryResult. * * To save memory, it's also possible to process these chunks directly by a custom stream parser, * similar to the way XML files are parsed by a SAX parser. Have a look at *src/sdp_client_rfcomm.c* * which retrieves the RFCOMM channel number and the service name. */ /* LISTING_START(HandleSDPQUeryResult): Handling query result chunks. */ static void handle_sdp_client_query_result(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ UNUSED(packet_type); UNUSED(channel); UNUSED(size); switch (packet[0]){ case SDP_EVENT_QUERY_ATTRIBUTE_VALUE: // handle new record if (sdp_event_query_attribute_byte_get_record_id(packet) != record_id){ record_id = sdp_event_query_attribute_byte_get_record_id(packet); printf("\n---\nRecord nr. %u\n", record_id); } assertBuffer(sdp_event_query_attribute_byte_get_attribute_length(packet)); attribute_value[sdp_event_query_attribute_byte_get_data_offset(packet)] = sdp_event_query_attribute_byte_get_data(packet); if ((uint16_t)(sdp_event_query_attribute_byte_get_data_offset(packet)+1) == sdp_event_query_attribute_byte_get_attribute_length(packet)){ printf("Attribute 0x%04x: ", sdp_event_query_attribute_byte_get_attribute_id(packet)); de_dump_data_element(attribute_value); } break; case SDP_EVENT_QUERY_COMPLETE: if (sdp_event_query_complete_get_status(packet)){ printf("SDP query failed 0x%02x\n", sdp_event_query_complete_get_status(packet)); break; } printf("SDP query done.\n"); break; } } /* LISTING_END */ #ifdef HAVE_POSIX_FILE_IO static void usage(const char *name){ printf("\nUsage: %s -a|--address aa:bb:cc:dd:ee:ff\n", name); printf("Use argument -a to connect to a specific device and dump the result of SDP query for L2CAP services.\n\n"); } #endif int btstack_main(int argc, const char * argv[]); int btstack_main(int argc, const char * argv[]){ #ifdef HAVE_POSIX_FILE_IO int remote_addr_found = 0; if (argc == 3) { if(!strcmp(argv[1], "-a") || !strcmp(argv[1], "--address")){ remote_addr_found = sscanf_bd_addr(argv[2], remote_addr); } } if (!remote_addr_found){ usage(argv[0]); exit(1); } #else (void)argc; (void)argv; sscanf_bd_addr(remote_addr_string, remote_addr); #endif sdp_client_init(); // turn on! hci_power_control(HCI_POWER_ON); return 0; } /* EXAMPLE_END */