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mesh: extract mesh_segmented_pdu_flatten

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This commit is contained in:
Matthias Ringwald 2020-03-21 22:46:00 +01:00
parent 25b07254fd
commit df3fbfcbf2
1 changed files with 19 additions and 20 deletions
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39
src/mesh/mesh_upper_transport.c
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@ -920,6 +920,21 @@ static void mesh_upper_transport_send_segmented_control_pdu(mesh_transport_pdu_t
}
#endif
static void mesh_segmented_pdu_flatten(btstack_linked_list_t * segments, uint8_t segment_len, uint8_t * buffer) {
// assemble payload
btstack_linked_list_iterator_t it;
btstack_linked_list_iterator_init(&it, segments);
while (btstack_linked_list_iterator_has_next(&it)) {
mesh_network_pdu_t *segment = (mesh_network_pdu_t *) btstack_linked_list_iterator_next(&it);
btstack_assert(segment->pdu_header.pdu_type == MESH_PDU_TYPE_NETWORK);
// get segment n
uint8_t *lower_transport_pdu = mesh_network_pdu_data(segment);
uint8_t seg_o = (big_endian_read_16(lower_transport_pdu, 2) >> 5) & 0x001f;
uint8_t *segment_data = &lower_transport_pdu[4];
(void) memcpy(&buffer[seg_o * segment_len], segment_data, segment_len);
}
}
static void mesh_upper_transport_run(void){
while(!btstack_linked_list_empty(&upper_transport_incoming)){
@ -977,15 +992,8 @@ static void mesh_upper_transport_run(void){
incoming_control_pdu= &incoming_control_pdu_singleton;
incoming_control_pdu->pdu_header.pdu_type = MESH_PDU_TYPE_CONTROL;
// assemble payload
while (message_pdu->segments){
mesh_network_pdu_t * segment = (mesh_network_pdu_t *) btstack_linked_list_pop(&message_pdu->segments);
// get segment n
uint8_t * lower_transport_pdu = mesh_network_pdu_data(segment);
uint8_t seg_o = ( big_endian_read_16(lower_transport_pdu, 2) >> 5) & 0x001f;
uint8_t * segment_data = &lower_transport_pdu[4];
(void)memcpy(&incoming_control_pdu->data[seg_o * 8], segment_data, 8);
}
// flatten
mesh_segmented_pdu_flatten(&message_pdu->segments, 8, incoming_control_pdu->data);
// copy meta data into encrypted pdu buffer
incoming_control_pdu->len = message_pdu->len;
@ -1009,17 +1017,8 @@ static void mesh_upper_transport_run(void){
incoming_access_pdu_encrypted->pdu_header.pdu_type = MESH_PDU_TYPE_ACCESS;
incoming_access_pdu_decrypted = &incoming_access_pdu_decrypted_singleton;
// flatten segmented message into mesh_access_pdu_t
// assemble payload
while (message_pdu->segments){
mesh_network_pdu_t * segment = (mesh_network_pdu_t *) btstack_linked_list_pop(&message_pdu->segments);
// get segment n
uint8_t * lower_transport_pdu = mesh_network_pdu_data(segment);
uint8_t seg_o = ( big_endian_read_16(lower_transport_pdu, 2) >> 5) & 0x001f;
uint8_t * segment_data = &lower_transport_pdu[4];
(void)memcpy(&incoming_access_pdu_encrypted->data[seg_o * 12], segment_data, 12);
}
// flatten
mesh_segmented_pdu_flatten(&message_pdu->segments, 12, incoming_access_pdu_encrypted->data);
// copy meta data into encrypted pdu buffer
incoming_access_pdu_encrypted->len = message_pdu->len;