[337] | 1 | /*
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| 2 | * Copyright (C) 2009-2013 by Matthias Ringwald
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| 3 | *
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| 4 | * Redistribution and use in source and binary forms, with or without
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| 5 | * modification, are permitted provided that the following conditions
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| 6 | * are met:
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| 7 | *
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| 8 | * 1. Redistributions of source code must retain the above copyright
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| 9 | * notice, this list of conditions and the following disclaimer.
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| 10 | * 2. Redistributions in binary form must reproduce the above copyright
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| 11 | * notice, this list of conditions and the following disclaimer in the
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| 12 | * documentation and/or other materials provided with the distribution.
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| 13 | * 3. Neither the name of the copyright holders nor the names of
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| 14 | * contributors may be used to endorse or promote products derived
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| 15 | * from this software without specific prior written permission.
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| 16 | * 4. Any redistribution, use, or modification is done solely for
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| 17 | * personal benefit and not for any commercial purpose or for
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| 18 | * monetary gain.
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| 19 | *
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| 20 | * THIS SOFTWARE IS PROVIDED BY MATTHIAS RINGWALD AND CONTRIBUTORS
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| 21 | * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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| 22 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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| 23 | * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS
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| 24 | * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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| 25 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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| 26 | * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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| 27 | * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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| 28 | * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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| 29 | * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
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| 30 | * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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| 31 | * SUCH DAMAGE.
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| 32 | *
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| 33 | * Please inquire about commercial licensing options at btstack@ringwald.ch
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| 34 | *
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| 35 | */
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| 36 |
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| 37 | /*
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| 38 | * sdp_rfcomm_query.c
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| 39 | */
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| 40 |
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| 41 | #include <stdint.h>
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| 42 | #include <stdio.h>
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| 43 | #include <stdlib.h>
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| 44 | #include <string.h>
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| 45 |
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| 46 | #include <btstack/hci_cmds.h>
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| 47 | #include <btstack/sdp_util.h>
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| 48 |
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| 49 | #include "sdp_client.h"
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| 50 | #include "sdp_query_rfcomm.h"
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| 51 |
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| 52 | static void dummy_notify_app(sdp_query_event_t* event, void * context);
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| 53 |
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| 54 | typedef enum {
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| 55 | GET_PROTOCOL_LIST_LENGTH = 1,
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| 56 | GET_PROTOCOL_LENGTH,
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| 57 | GET_PROTOCOL_ID_HEADER_LENGTH,
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| 58 | GET_PROTOCOL_ID,
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| 59 | GET_PROTOCOL_VALUE_LENGTH,
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| 60 | GET_PROTOCOL_VALUE
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| 61 | } pdl_state_t;
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| 62 |
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| 63 |
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| 64 | // higher layer query - get rfcomm channel and name
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| 65 |
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| 66 | const uint8_t des_attributeIDList[] = { 0x35, 0x05, 0x0A, 0x00, 0x01, 0x01, 0x00}; // Arribute: 0x0001 - 0x0100
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| 67 |
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| 68 | static uint8_t des_serviceSearchPattern[5] = {0x35, 0x03, 0x19, 0x00, 0x00};
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| 69 |
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| 70 | static uint8_t sdp_service_name[SDP_SERVICE_NAME_LEN+1];
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| 71 | static uint8_t sdp_rfcom_channel_nr = 0;
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| 72 | static uint8_t sdp_service_name_header_size;
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| 73 |
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| 74 | static pdl_state_t pdl_state = GET_PROTOCOL_LIST_LENGTH;
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| 75 | static int protocol_value_bytes_received = 0;
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| 76 | static uint16_t protocol_id = 0;
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| 77 | static int protocol_offset;
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| 78 | static int protocol_size;
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| 79 | static int protocol_id_bytes_to_read;
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| 80 | static int protocol_value_size;
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| 81 | static de_state_t de_header_state;
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| 82 | static de_state_t sn_de_header_state;
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| 83 |
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| 84 | static void *sdp_app_context;
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| 85 | static void (*sdp_app_callback)(sdp_query_event_t * event, void * context) = dummy_notify_app;
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| 86 |
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| 87 | //
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| 88 |
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| 89 | static void dummy_notify_app(sdp_query_event_t* event, void * context){}
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| 90 |
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| 91 | void sdp_query_rfcomm_register_callback(void (*sdp_callback)(sdp_query_event_t* event, void * context), void * context){
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| 92 | sdp_app_callback = dummy_notify_app;
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| 93 | if (sdp_callback != NULL){
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| 94 | sdp_app_callback = sdp_callback;
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| 95 | }
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| 96 | sdp_app_context = context;
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| 97 | }
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| 98 |
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| 99 | void handleProtocolDescriptorListData(uint32_t attribute_value_length, uint32_t data_offset, uint8_t data){
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| 100 | // init state on first byte
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| 101 | if (data_offset == 0){
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| 102 | pdl_state = GET_PROTOCOL_LIST_LENGTH;
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| 103 | }
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| 104 |
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| 105 | // log_info("handleProtocolDescriptorListData (%u,%u) %02x", attribute_value_length, data_offset, data);
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| 106 |
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| 107 | switch(pdl_state){
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| 108 |
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| 109 | case GET_PROTOCOL_LIST_LENGTH:
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| 110 | if (!de_state_size(data, &de_header_state)) break;
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| 111 | // log_info(" query: PD List payload is %d bytes.", de_header_state.de_size);
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| 112 | // log_info(" query: PD List offset %u, list size %u", de_header_state.de_offset, de_header_state.de_size);
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| 113 |
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| 114 | pdl_state = GET_PROTOCOL_LENGTH;
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| 115 | break;
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| 116 |
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| 117 | case GET_PROTOCOL_LENGTH:
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| 118 | // check size
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| 119 | if (!de_state_size(data, &de_header_state)) break;
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| 120 | // log_info(" query: PD Record payload is %d bytes.", de_header_state.de_size);
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| 121 |
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| 122 | // cache protocol info
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| 123 | protocol_offset = de_header_state.de_offset;
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| 124 | protocol_size = de_header_state.de_size;
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| 125 |
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| 126 | pdl_state = GET_PROTOCOL_ID_HEADER_LENGTH;
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| 127 | break;
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| 128 |
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| 129 | case GET_PROTOCOL_ID_HEADER_LENGTH:
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| 130 | protocol_offset++;
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| 131 | if (!de_state_size(data, &de_header_state)) break;
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| 132 |
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| 133 | protocol_id = 0;
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| 134 | protocol_id_bytes_to_read = de_header_state.de_size;
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| 135 | // log_info(" query: ID data is stored in %d bytes.", protocol_id_bytes_to_read);
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| 136 | pdl_state = GET_PROTOCOL_ID;
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| 137 |
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| 138 | break;
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| 139 |
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| 140 | case GET_PROTOCOL_ID:
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| 141 | protocol_offset++;
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| 142 |
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| 143 | protocol_id = (protocol_id << 8) | data;
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| 144 | protocol_id_bytes_to_read--;
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| 145 | if (protocol_id_bytes_to_read > 0) break;
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| 146 |
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| 147 | // log_info(" query: Protocol ID: %04x.", protocol_id);
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| 148 |
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| 149 | if (protocol_offset >= protocol_size){
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| 150 | pdl_state = GET_PROTOCOL_LENGTH;
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| 151 | // log_info(" query: Get next protocol");
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| 152 | break;
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| 153 | }
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| 154 |
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| 155 | pdl_state = GET_PROTOCOL_VALUE_LENGTH;
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| 156 | protocol_value_bytes_received = 0;
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| 157 | break;
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| 158 |
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| 159 | case GET_PROTOCOL_VALUE_LENGTH:
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| 160 | protocol_offset++;
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| 161 |
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| 162 | if (!de_state_size(data, &de_header_state)) break;
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| 163 |
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| 164 | protocol_value_size = de_header_state.de_size;
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| 165 | pdl_state = GET_PROTOCOL_VALUE;
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| 166 | sdp_rfcom_channel_nr = 0;
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| 167 | break;
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| 168 |
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| 169 | case GET_PROTOCOL_VALUE:
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| 170 | protocol_offset++;
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| 171 | protocol_value_bytes_received++;
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| 172 |
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| 173 | // log_info(" query: protocol_value_bytes_received %u, protocol_value_size %u", protocol_value_bytes_received, protocol_value_size);
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| 174 |
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| 175 | if (protocol_value_bytes_received < protocol_value_size) break;
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| 176 |
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| 177 | if (protocol_id == 0x0003){
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| 178 | // log_info("\n\n ******* Data ***** %02x\n\n", data);
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| 179 | sdp_rfcom_channel_nr = data;
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| 180 | }
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| 181 |
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| 182 | // log_info(" query: protocol done");
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| 183 | // log_info(" query: Protocol offset %u, protocol size %u", protocol_offset, protocol_size);
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| 184 |
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| 185 | if (protocol_offset >= protocol_size) {
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| 186 | pdl_state = GET_PROTOCOL_LENGTH;
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| 187 | break;
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| 188 |
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| 189 | }
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| 190 | pdl_state = GET_PROTOCOL_ID_HEADER_LENGTH;
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| 191 | // log_info(" query: Get next protocol");
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| 192 | break;
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| 193 | default:
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| 194 | break;
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| 195 | }
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| 196 | }
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| 197 |
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| 198 | void handleServiceNameData(uint32_t attribute_value_length, uint32_t data_offset, uint8_t data){
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| 199 | int name_len;
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| 200 | int name_pos;
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| 201 |
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| 202 | // Get Header Len
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| 203 | if (data_offset == 0){
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| 204 | de_state_size(data, &sn_de_header_state);
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| 205 | sdp_service_name_header_size = sn_de_header_state.addon_header_bytes + 1;
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| 206 | return;
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| 207 | }
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| 208 |
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| 209 | // Get Header
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| 210 | if (data_offset < sdp_service_name_header_size){
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| 211 | de_state_size(data, &sn_de_header_state);
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| 212 | return;
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| 213 | }
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| 214 |
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| 215 | // Process payload
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| 216 | name_len = attribute_value_length - sdp_service_name_header_size;
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| 217 | name_pos = data_offset - sdp_service_name_header_size;
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| 218 |
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| 219 | if (name_pos < SDP_SERVICE_NAME_LEN){
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| 220 | sdp_service_name[name_pos] = data;
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| 221 | name_pos++;
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| 222 |
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| 223 | // terminate if name complete
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| 224 | if (name_pos >= name_len){
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| 225 | sdp_service_name[name_pos] = 0;
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| 226 | }
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| 227 |
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| 228 | // terminate if buffer full
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| 229 | if (name_pos == SDP_SERVICE_NAME_LEN){
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| 230 | sdp_service_name[name_pos] = 0;
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| 231 | }
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| 232 | }
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| 233 |
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| 234 | // notify on last char
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| 235 | if (data_offset == attribute_value_length - 1 && sdp_rfcom_channel_nr!=0){
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| 236 | sdp_query_rfcomm_service_event_t value_event = {
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| 237 | SDP_QUERY_RFCOMM_SERVICE,
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| 238 | sdp_rfcom_channel_nr,
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| 239 | (uint8_t *) sdp_service_name
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| 240 | };
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| 241 | (*sdp_app_callback)((sdp_query_event_t*)&value_event, sdp_app_context);
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| 242 | sdp_rfcom_channel_nr = 0;
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| 243 | }
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| 244 | }
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| 245 |
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| 246 |
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| 247 | static void handle_sdp_parser_event(sdp_query_event_t * event){
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| 248 | sdp_query_attribute_value_event_t * ve;
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| 249 | switch (event->type){
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| 250 | case SDP_QUERY_ATTRIBUTE_VALUE:
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| 251 | ve = (sdp_query_attribute_value_event_t*) event;
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| 252 | // log_info("handle_sdp_parser_event [ AID, ALen, DOff, Data] : [%x, %u, %u] BYTE %02x",
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| 253 | // ve->attribute_id, ve->attribute_length, ve->data_offset, ve->data);
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| 254 |
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| 255 | switch (ve->attribute_id){
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| 256 | case SDP_ProtocolDescriptorList:
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| 257 | // find rfcomm channel
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| 258 | handleProtocolDescriptorListData(ve->attribute_length, ve->data_offset, ve->data);
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| 259 | break;
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| 260 | case 0x0100:
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| 261 | // get service name
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| 262 | handleServiceNameData(ve->attribute_length, ve->data_offset, ve->data);
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| 263 | break;
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| 264 | default:
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| 265 | // give up
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| 266 | return;
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| 267 | }
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| 268 | break;
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| 269 | case SDP_QUERY_COMPLETE:
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| 270 | (*sdp_app_callback)(event, sdp_app_context);
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| 271 | break;
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| 272 | }
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| 273 | // insert higher level code HERE
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| 274 | }
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| 275 |
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| 276 | void sdp_query_rfcomm_init(){
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| 277 | // init
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| 278 | de_state_init(&de_header_state);
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| 279 | de_state_init(&sn_de_header_state);
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| 280 | pdl_state = GET_PROTOCOL_LIST_LENGTH;
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| 281 | protocol_offset = 0;
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| 282 | sdp_parser_register_callback(handle_sdp_parser_event);
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| 283 | }
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| 284 |
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| 285 |
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| 286 | void sdp_query_rfcomm_channel_and_name_for_search_pattern(bd_addr_t remote, uint8_t * serviceSearchPattern){
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| 287 | sdp_parser_init();
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| 288 | sdp_query_rfcomm_init();
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| 289 | sdp_client_query(remote, serviceSearchPattern, (uint8_t*)&des_attributeIDList[0]);
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| 290 | }
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| 291 |
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| 292 | void sdp_query_rfcomm_channel_and_name_for_uuid(bd_addr_t remote, uint16_t uuid){
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| 293 | net_store_16(des_serviceSearchPattern, 3, uuid);
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| 294 | sdp_query_rfcomm_channel_and_name_for_search_pattern(remote, (uint8_t*)des_serviceSearchPattern);
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| 295 | }
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| 296 |
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| 297 | void sdp_query_rfcomm_deregister_callback(){
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| 298 | sdp_query_rfcomm_init();
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| 299 | sdp_app_callback = dummy_notify_app;
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| 300 | sdp_app_context = NULL;
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| 301 | }
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