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https://github.com/bluekitchen/btstack.git
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rewrote sdp_handle_service_attribute_request to support minimal buffers
This commit is contained in:
matthias.ringwald
parent
cf5c39ed1c
commit
573f264739
78
src/sdp.c
78
src/sdp.c
@ -383,40 +383,40 @@ int sdp_handle_service_attribute_request(uint8_t * packet, uint16_t remote_mtu){
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return sdp_create_error_response(transaction_id, 0x0002); /// invalid Service Record Handle
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}
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// header
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sdp_response_buffer[0] = SDP_ServiceAttributeResponse;
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net_store_16(sdp_response_buffer, 1, transaction_id);
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// AttributeList - starts at offset 7
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uint16_t pos = 7;
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uint8_t *attributeList = &sdp_response_buffer[pos];
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de_create_sequence(attributeList);
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// copy ALL specified attributes
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sdp_append_attributes_in_attributeIDList(item->service_record, attributeIDList, 0, SDP_RESPONSE_BUFFER_SIZE-7-3, attributeList);
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pos += de_get_len(attributeList);
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// handle continuation
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if (continuation_offset){
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memmove(&sdp_response_buffer[7], &sdp_response_buffer[7+continuation_offset], maximumAttributeByteCount);
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pos -= continuation_offset;
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if (continuation_offset == 0){
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// get size of this record
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uint16_t filtered_attributes_size = spd_get_filtered_size(item->service_record, attributeIDList);
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// store DES
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de_store_descriptor_with_len(&sdp_response_buffer[pos], DE_DES, DE_SIZE_VAR_16, filtered_attributes_size);
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maximumAttributeByteCount -= 3;
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pos += 3;
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}
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// copy maximumAttributeByteCount from record
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uint16_t bytes_used;
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int complete = sdp_filter_attributes_in_attributeIDList(item->service_record, attributeIDList, continuation_offset, maximumAttributeByteCount, &bytes_used, &sdp_response_buffer[pos]);
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pos += bytes_used;
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uint16_t attributeListByteCount = pos - 7;
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// Continuation State
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if (pos <= 7 + maximumAttributeByteCount) {
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// complete
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if (complete) {
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sdp_response_buffer[pos++] = 0;
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} else {
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pos = 7 + maximumAttributeByteCount;
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attributeListByteCount = maximumAttributeByteCount;
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continuation_offset += maximumAttributeByteCount;
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continuation_offset += bytes_used;
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sdp_response_buffer[pos++] = 2;
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net_store_16(sdp_response_buffer, pos, (uint16_t) continuation_offset);
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net_store_16(sdp_response_buffer, pos, continuation_offset);
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pos += 2;
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}
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// update header
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// header
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sdp_response_buffer[0] = SDP_ServiceAttributeResponse;
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net_store_16(sdp_response_buffer, 1, transaction_id);
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net_store_16(sdp_response_buffer, 3, pos - 5); // size of variable payload
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net_store_16(sdp_response_buffer, 5, attributeListByteCount);
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@ -467,7 +467,7 @@ int sdp_handle_service_search_attribute_request(uint8_t * packet, uint16_t remot
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continuation_offset = READ_NET_16(continuationState, 3);
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}
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printf("--> sdp_handle_service_search_attribute_request, cont %u/%u, max %u\n", continuation_service_index, continuation_offset, maximumAttributeByteCount);
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// printf("--> sdp_handle_service_search_attribute_request, cont %u/%u, max %u\n", continuation_service_index, continuation_offset, maximumAttributeByteCount);
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// AttributeLists - starts at offset 7
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uint16_t pos = 7;
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@ -476,7 +476,7 @@ int sdp_handle_service_search_attribute_request(uint8_t * packet, uint16_t remot
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if (continuation_service_index == 0 && continuation_offset == 0){
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uint16_t total_response_size = sdp_get_size_for_service_search_attribute_response(serviceSearchPattern, attributeIDList);
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de_store_descriptor_with_len(&sdp_response_buffer[pos], DE_DES, DE_SIZE_VAR_16, total_response_size);
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log_info("total response size %u\n", total_response_size);
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// log_info("total response size %u\n", total_response_size);
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pos += 3;
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maximumAttributeByteCount -= 3;
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}
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@ -524,7 +524,6 @@ int sdp_handle_service_search_attribute_request(uint8_t * packet, uint16_t remot
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continuation = 1;
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continuation_offset += bytes_used;
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break;
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}
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uint16_t attributeListsByteCount = pos - 7;
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@ -670,7 +669,7 @@ static void dump_service_search_response(void){
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void sdp_test(){
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const uint16_t remote_mtu = 23;
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const uint16_t remote_mtu = 48;
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uint8_t allAttributeIDs[20]; //
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// create an attribute list
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@ -710,7 +709,10 @@ void sdp_test(){
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printf("Attribute size %u\n", size);
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uint16_t transactionID = 1;
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uint8_t * attributeIDList;
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uint16_t attributeIDListLen;
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uint16_t response_pos;
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#if 0
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// sdp_handle_service_search_request
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uint16_t nr_services = 1;
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@ -726,18 +728,18 @@ void sdp_test(){
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dump_service_search_response();
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#endif
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#if 0
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#if 1
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// sdp_handle_service_attribute_request
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request[0] = SDP_ServiceAttributeRequest;
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net_store_16(request, 1, transactionID++); // transaction ID
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net_store_32(request, 5, handle_1); // record handle
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net_store_16(request, 9, 10); // max bytes
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uint8_t * attributeIDList = request + 11;
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net_store_16(request, 9, 11); // max bytes
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attributeIDList = request + 11;
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de_create_sequence(attributeIDList);
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de_add_number(attributeIDList, DE_UINT, DE_SIZE_32, 0x0000ffff);
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uint16_t attributeIDListLen = de_get_len(attributeIDList);
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attributeIDListLen = de_get_len(attributeIDList);
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request[11+attributeIDListLen] = 0;
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uint16_t response_pos = 0;
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response_pos = 0;
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while(1) {
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sdp_handle_service_attribute_request(request, remote_mtu);
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@ -745,8 +747,10 @@ void sdp_test(){
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memcpy( &response[response_pos], &sdp_response_buffer[7], attributeListByteCount);
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response_pos += attributeListByteCount;
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printf("Continuation %u, offset %u\n", sdp_response_buffer[7+attributeListByteCount], READ_NET_16(sdp_response_buffer, 7+attributeListByteCount+1));
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printf("attributeListByteCount %u\n", attributeListByteCount);
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printf("Continuation %u\n", sdp_response_buffer[7+attributeListByteCount]);
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if (sdp_response_buffer[7+attributeListByteCount] == 0) break;
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printf("Continuation {%u}\n", READ_NET_16(sdp_response_buffer, 7+attributeListByteCount+1));
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memcpy(request+11+attributeIDListLen, sdp_response_buffer+7+attributeListByteCount, 3);
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}
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de_dump_data_element(response);
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@ -762,13 +766,13 @@ void sdp_test(){
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de_add_number(serviceSearchPattern, DE_UUID, DE_SIZE_16, 0x0001);
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}
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uint16_t serviceSearchPatternLen = de_get_len(serviceSearchPattern);
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net_store_16(request, 5 + serviceSearchPatternLen, 1000); // MaximumAttributeByteCount:
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uint8_t * attributeIDList = request + 5 + serviceSearchPatternLen + 2;
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net_store_16(request, 5 + serviceSearchPatternLen, 11); // MaximumAttributeByteCount:
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attributeIDList = request + 5 + serviceSearchPatternLen + 2;
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de_create_sequence(attributeIDList);
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de_add_number(attributeIDList, DE_UINT, DE_SIZE_32, 0x0000ffff);
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uint16_t attributeIDListLen = de_get_len(attributeIDList);
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attributeIDListLen = de_get_len(attributeIDList);
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request[5 + serviceSearchPatternLen + 2 + attributeIDListLen] = 0;
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uint16_t response_pos = 0;
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response_pos = 0;
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while (1) {
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sdp_handle_service_search_attribute_request(request, remote_mtu);
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uint16_t attributeListByteCount = READ_NET_16(sdp_response_buffer, 5);
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