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l2cap-ertm: free tx packets based on req seq in i-frame

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This commit is contained in:
Matthias Ringwald 2017-07-17 16:07:21 +02:00
parent 212b6be258
commit 2a424812a1
1 changed files with 17 additions and 12 deletions
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29
src/l2cap.c
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@ -586,7 +586,7 @@ static int l2cap_ertm_send(l2cap_channel_t * channel, uint8_t * data, uint16_t l
return L2CAP_DATA_LEN_EXCEEDS_REMOTE_MTU;
}
// TODO: check tx_transmit
// store int tx packet buffer
// store int tx packet bufferx
int index = channel->tx_write_index;
l2cap_ertm_tx_packet_state_t * tx_state = &channel->tx_packets_state[index];
tx_state->tx_seq = channel->next_tx_seq;
@ -1706,6 +1706,20 @@ uint8_t l2cap_accept_ertm_connection(uint16_t local_cid, int ertm_mandatory, uin
return ERROR_CODE_SUCCESS;
}
static void l2cap_ertm_handle_req_seq(l2cap_channel_t * l2cap_channel, uint8_t req_seq){
l2cap_ertm_tx_packet_state_t * tx_state;
tx_state = &l2cap_channel->tx_packets_state[l2cap_channel->tx_read_index];
if ( ((req_seq - 1) & 0x3f) == tx_state->tx_seq){
log_info("RR seq %u == seq of oldest tx packet -> packet done", req_seq);
l2cap_channel->tx_read_index++;
if (l2cap_channel->tx_read_index >= l2cap_channel->num_rx_buffers){
l2cap_channel->tx_read_index = 0;
}
} else {
log_info("RR seq %u != seq of oldest tx packet %u ???", req_seq, tx_state->tx_seq);
}
}
#endif
@ -2480,19 +2494,9 @@ static void l2cap_acl_handler(uint8_t packet_type, uint16_t channel, uint8_t *pa
// S-Frame
// int poll = (control >> 7) & 0x01;
l2cap_supervisory_function_t s = (l2cap_supervisory_function_t) ((control >> 2) & 0x03);
l2cap_ertm_tx_packet_state_t * tx_state;
switch (s){
case L2CAP_SUPERVISORY_FUNCTION_RR_RECEIVER_READY:
tx_state = &l2cap_channel->tx_packets_state[l2cap_channel->tx_read_index];
if ( ((req_seq - 1) & 0x3f) == tx_state->tx_seq){
log_info("RR seq %u == seq of oldest tx packet -> packet done", req_seq);
l2cap_channel->tx_read_index++;
if (l2cap_channel->tx_read_index >= l2cap_channel->num_rx_buffers){
l2cap_channel->tx_read_index = 0;
}
} else {
log_info("RR seq %u != seq of oldest tx packet %u ???", req_seq, tx_state->tx_seq);
}
l2cap_ertm_handle_req_seq(l2cap_channel, req_seq);
break;
default:
break;
@ -2506,6 +2510,7 @@ static void l2cap_acl_handler(uint8_t packet_type, uint16_t channel, uint8_t *pa
log_info("Control: 0x%04x => SAR %u, ReqSeq %02u, R?, TxSeq %02u", control, (int) sar, req_seq, tx_seq);
log_info("SAR: pos %u", l2cap_channel->rx_packets_state->pos);
log_info("State: expected_tx_seq %02u, req_seq %02u", l2cap_channel->expected_tx_seq, l2cap_channel->req_seq);
l2cap_ertm_handle_req_seq(l2cap_channel, req_seq);
// check ordering
if (l2cap_channel->expected_tx_seq == tx_seq){
log_info("Received expected frame with TxSeq == ExpectedTxSeq == %02u", tx_seq);