Crash_Override/FreeDATA
1
0
Fork 0
mirror of https://github.com/DJ2LS/FreeDATA synced 2024-05-14 08:04:33 +00:00
Code Issues Projects Releases Packages Wiki Activity

handle data sent twice

Browse source 
if the ACK frame doesnt receive its destination and data will be resent, we can handle this now.
This commit is contained in:
dj2ls 2022-01-10 17:01:33 +01:00
parent ec83c16856
commit 0baa544bf0
1 changed files with 13 additions and 3 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

16
tnc/data_handler.py
View file

@ -261,10 +261,20 @@ class DATA():
this is the ideal case because we received all data
'''
if not None in static.RX_BURST_BUFFER:
# then iterate through burst buffer and append data to frame buffer
# then iterate through burst buffer and stick the burst together
# the temp burst buffer is needed for checking, if we already recevied data
temp_burst_buffer = b''
for i in range(0,len(static.RX_BURST_BUFFER)):
static.RX_FRAME_BUFFER += static.RX_BURST_BUFFER[i]
# then delete burst buffer
#static.RX_FRAME_BUFFER += static.RX_BURST_BUFFER[i]
temp_burst_buffer += static.RX_BURST_BUFFER[i]
# if frame buffer ends not with the current frame, we are going to append new data
# if data already exists, we received the frame correctly, but the ACK frame didnt receive its destination (ISS)
if not static.RX_FRAME_BUFFER.endswith(temp_burst_buffer):
static.RX_FRAME_BUFFER += temp_burst_buffer
static.RX_BURST_BUFFER = []
else:
structlog.get_logger("structlog").info("[TNC] ARQ | RX | Frame already received - sending ACK again")
static.RX_BURST_BUFFER = []
# lets check if we didnt receive a BOF and EOF yet to avoid sending ack frames if we already received all data