def create_ack_schc_ko(self, schc_frag):
"""Create schc_ack packet in case of wrong RCS (C=0)
return schc_ack packet
"""
bit_list = find_missing_tiles_mic_ko_yes_all_1(
self.tile_list, self.rule[T_FRAG][T_FRAG_PROF][T_FRAG_FCN],
schcmsg.get_fcn_all_1(self.rule))
for tile in self.tile_list:
print("w-num: {} t-num: {} nb_tiles:{}".format(
tile['w-num'], tile['t-num'], tile['nb_tiles']))
print("raw_tiles:{}".format(tile['raw_tiles']))
print('send ack before done {}'.format(bit_list))
assert bit_list is not None
if bit_list:
# Some tiles are actually missing, send ACK for first window with missing tiles
print("missing wn={} bitmap={}".format(bit_list[0][0],
bit_list[0][1]))
# XXX compress bitmap if needed.
# ACK failure message
schc_ack = schcmsg.frag_receiver_tx_all1_ack(schc_frag.rule,
schc_frag.dtag,
win=bit_list[0][0],
cbit=0,
bitmap=bit_list[0][1])
else:
window_list = make_bit_list_mic_ko(
self.tile_list, self.rule[T_FRAG][T_FRAG_PROF][T_FRAG_FCN],
schcmsg.get_fcn_all_1(self.rule))
last_window = max(window_list.keys())
# No tiles are detected missing, send ACK for last window
print("No missing tiles, sending last window: wn={} bitmap={}".
format(last_window, BitBuffer(window_list[last_window])))
# XXX compress bitmap if needed.
# ACK failure message
schc_ack = schcmsg.frag_receiver_tx_all1_ack(
schc_frag.rule,
schc_frag.dtag,
win=last_window,
cbit=0,
bitmap=BitBuffer(window_list[last_window]))
if enable_statsct:
Statsct.set_msg_type("SCHC_ACK_KO")
print(
"----------------------- SCHC ACK KO SEND -----------------------"
)
print("ACK failure sent:", schc_ack.__dict__)
return schc_ack
def finish(self, schc_packet, schc_frag):
self.state = "DONE"
print('state DONE -> {}'.format(self.state))
#input('DONE')
# decompression
self.protocol.process_decompress(schc_packet, self.sender_L2addr, direction="UP")
# ACK message
schc_ack = schcmsg.frag_receiver_tx_all1_ack(
schc_frag.rule,
schc_frag.dtag,
schc_frag.win,
cbit=1)
print("ACK success sent:", schc_ack.__dict__)
if enable_statsct:
Statsct.set_msg_type("SCHC_ACK_OK")
print("----------------------- SCHC ACK OK SEND -----------------------")
"""
Changement à corriger
args = (schc_ack.packet.get_content(), self.context["devL2Addr"])
"""
args = (schc_ack.packet.get_content(), '*')
self.protocol.scheduler.add_event(0, self.protocol.layer2.send_packet, args)
# XXX need to keep the ack message for the ack request.
#the ack is build everytime
self.schc_ack = schc_ack
def finish(self, schc_packet, schc_frag):
self.state = "DONE"
# decompression
self.protocol.process_decompress(self.context, self.sender_L2addr,
schc_packet)
# ACK message
schc_ack = schcmsg.frag_receiver_tx_all1_ack(schc_frag.rule,
schc_frag.dtag,
schc_frag.win,
cbit=1)
print("ACK success sent:", schc_ack.__dict__)
args = (schc_ack.packet.get_content(), self.context["devL2Addr"])
self.protocol.scheduler.add_event(0, self.protocol.layer2.send_packet,
args)
def receive_frag(self, bbuf, dtag):
schc_frag = schcmsg.frag_receiver_rx(self.rule, bbuf)
print("receiver frag received:", schc_frag.__dict__)
# XXX how to authenticate the message from the peer. without
# authentication, any nodes can cancel the invactive timer.
self.cancel_inactive_timer()
#
if schc_frag.abort == True:
print("Received Sender-Abort.")
# XXX needs to release all resources.
return
if self.state == "DONE":
print("XXX need sending ACK back.")
return
# append the payload to the tile list.
# padding truncation is done later. see below.
nb_tiles = schc_frag.payload.count_added_bits(
) // self.rule["tileSize"]
# Note that nb_tiles is the number of tiles which is exact number of the
# size of the tile. the tile of which the size is less than the size
# is not included.
self.tile_list.append({
"w-num": schc_frag.win,
"t-num": schc_frag.fcn,
"nb_tiles": nb_tiles,
"raw_tiles": schc_frag.payload
})
self.tile_list = sort_tile_list(self.tile_list, self.rule["FCNSize"])
if self.mic_received is not None:
schc_packet, mic_calced = self.get_mic_from_tiles_received()
if self.mic_received == mic_calced:
self.finish(schc_packet, schc_frag)
return
else:
# XXX waiting for the fragments requested by ACK.
# during MAX_ACK_REQUESTS
print("waiting for more fragments.")
elif schc_frag.fcn == schcmsg.get_fcn_all_1(self.rule):
print("ALL1 received")
self.mic_received = schc_frag.mic
schc_packet, mic_calced = self.get_mic_from_tiles_received()
if schc_frag.mic == mic_calced:
self.finish(schc_packet, schc_frag)
return
else:
print("ERROR: MIC mismatched. packet {} != result {}".format(
schc_frag.mic, mic_calced))
bit_list = find_missing_tiles(self.tile_list,
self.rule["FCNSize"],
schcmsg.get_fcn_all_1(self.rule))
assert bit_list is not None
for bl_index in range(len(bit_list)):
print("missing wn={} bitmap={}".format(
bit_list[bl_index][0], bit_list[bl_index][1]))
# XXX compress bitmap if needed.
# ACK failure message
schc_ack = schcmsg.frag_receiver_tx_all1_ack(
schc_frag.rule,
schc_frag.dtag,
win=bit_list[bl_index][0],
cbit=0,
bitmap=bit_list[bl_index][1])
print("ACK failure sent:", schc_ack.__dict__)
args = (schc_ack.packet.get_content(),
self.context["devL2Addr"])
self.protocol.scheduler.add_event(
0, self.protocol.layer2.send_packet, args)
# XXX need to keep the ack message for the ack request.
# set inactive timer.
self.event_id_inactive_timer = self.protocol.scheduler.add_event(
self.inactive_timer, self.event_inactive, tuple())
print("---", schc_frag.fcn)
def resend_ack(self, schc_frag):
print("resend ack method")
print(schc_frag.__dict__)
if self.mic_received is not None:
schc_packet, mic_calced = self.get_mic_from_tiles_received()
print("schc_frag.mic: {}, mic_calced: {}".format(self.mic_received,mic_calced))
if self.mic_received == mic_calced:
self.state = "DONE"
if self.state == "DONE":
# ACK message
schc_ack = schcmsg.frag_receiver_tx_all1_ack(
schc_frag.rule,
schc_frag.dtag,
schc_frag.win,
cbit=1)
print("ACK success sent:", schc_ack.__dict__)
if enable_statsct:
Statsct.set_msg_type("SCHC_ACK_OK")
print("----------------------- SCHC ACK OK SEND -----------------------")
else:
if self.all1_received:
print("all-1 received, building ACK")
print('send ack before done {},{},{}'.format(self.tile_list,
self.rule[T_FRAG][T_FRAG_PROF][T_FRAG_FCN], schcmsg.get_fcn_all_1(self.rule)))
schc_ack = self.create_ack_schc_ko(schc_frag)
else:
#special case when the ALL-1 message is lost: 2 cases:
#1) the all-1 carries a tile (bit in bitmap)
#2) the all-1 only carries the MIC (no bit in bitmap)
if self.fragment_received is False:
print("no fragments received yet, abort")
self.send_receiver_abort()
return
print("all-1 not received, building ACK")
print('send ack before done {},{},{}'.format(self.tile_list,
self.rule[T_FRAG][T_FRAG_PROF][T_FRAG_FCN], schcmsg.get_fcn_all_1(self.rule)))
for tile in self.tile_list:
print("w-num: {} t-num: {} nb_tiles:{}".format(
tile['w-num'],tile['t-num'],tile['nb_tiles']))
print("raw_tiles:{}".format(tile['raw_tiles']))
bit_list = find_missing_tiles_no_all_1(self.tile_list,
self.rule[T_FRAG][T_FRAG_PROF][T_FRAG_FCN],
schcmsg.get_fcn_all_1(self.rule))
print('send ack before done {}'.format(bit_list))
assert bit_list is not None
if len(bit_list) == 0:
bit_list = find_missing_tiles_no_all_1(self.tile_list,
self.rule[T_FRAG][T_FRAG_PROF][T_FRAG_FCN],
schcmsg.get_fcn_all_1(self.rule))
for bl_index in range(len(bit_list)):
print("missing wn={} bitmap={}".format(bit_list[bl_index][0],
bit_list[bl_index][1]))
# XXX compress bitmap if needed.
# ACK failure message
schc_ack = schcmsg.frag_receiver_tx_all1_ack(
schc_frag.rule,
schc_frag.dtag,
win=bit_list[bl_index][0],
cbit=0,
bitmap=bit_list[bl_index][1])
if enable_statsct:
Statsct.set_msg_type("SCHC_ACK_KO")
print("----------------------- SCHC ACK KO SEND -----------------------")
print("ACK failure sent:", schc_ack.__dict__)
"""
Changement à corriger
args = (schc_ack.packet.get_content(), self.context["devL2Addr"])
"""
args = (schc_ack.packet.get_content(), "*")
self.protocol.scheduler.add_event(0, self.protocol.layer2.send_packet, args)
def resend_ack(self, schc_frag):
print("resend ack method")
print(schc_frag.__dict__)
if self.mic_received is not None:
schc_packet, mic_calced = self.get_mic_from_tiles_received()
print("schc_frag.mic: {}, mic_calced: {}".format(self.mic_received,mic_calced))
if self.mic_received == mic_calced:
self.state = "DONE"
if self.state == "DONE":
# ACK message
schc_ack = schcmsg.frag_receiver_tx_all1_ack(
schc_frag.rule,
schc_frag.dtag,
schc_frag.win,
cbit=1)
print("ACK success sent:", schc_ack.__dict__)
if enable_statsct:
Statsct.set_msg_type("SCHC_ACK_OK")
print("----------------------- SCHC ACK OK SEND -----------------------")
else:
if self.all1_received:
print("all-1 received, building ACK")
print('send ack before done {},{},{}'.format(self.tile_list,
self.rule["FCNSize"], schcmsg.get_fcn_all_1(self.rule)))
bit_list = find_missing_tiles_mic_ko_yes_all_1(self.tile_list,
self.rule["FCNSize"],
schcmsg.get_fcn_all_1(self.rule))
for tile in self.tile_list:
print("w-num: {} t-num: {} nb_tiles:{}".format(
tile['w-num'],tile['t-num'],tile['nb_tiles']))
print("raw_tiles:{}".format(tile['raw_tiles']))
print('send ack before done {}'.format(bit_list))
assert bit_list is not None
if len(bit_list) == 0:
#When the find_missing_tiles functions returns an empty array
#but we know something is missing because the MIC calculation is wrong
#this can happen when the first fragments are lost
print("bit list empty")
bit_list = find_missing_tiles_mic_ko_yes_all_1(self.tile_list,
self.rule["FCNSize"],
schcmsg.get_fcn_all_1(self.rule))
print("new bit list, should it work???")
for bl_index in range(len(bit_list)):
print("missing wn={} bitmap={}".format(bit_list[bl_index][0],
bit_list[bl_index][1]))
# XXX compress bitmap if needed.
# ACK failure message
schc_ack = schcmsg.frag_receiver_tx_all1_ack(
schc_frag.rule,
schc_frag.dtag,
win=bit_list[bl_index][0],
cbit=0,
bitmap=bit_list[bl_index][1])
if enable_statsct:
Statsct.set_msg_type("SCHC_ACK_KO")
print("----------------------- SCHC ACK KO SEND -----------------------")
print("ACK failure sent:", schc_ack.__dict__)
break
else:
#special case when the ALL-1 message is lost: 2 cases:
#1) the all-1 carries a tile (bit in bitmap)
#2) the all-1 only carries the MIC (no bit in bitmap)
if self.fragment_received is False:
print("no fragments received yet, abort")
self.send_receiver_abort()
return
print("all-1 not received, building ACK")
print('send ack before done {},{},{}'.format(self.tile_list,
self.rule["FCNSize"], schcmsg.get_fcn_all_1(self.rule)))
for tile in self.tile_list:
print("w-num: {} t-num: {} nb_tiles:{}".format(
tile['w-num'],tile['t-num'],tile['nb_tiles']))
print("raw_tiles:{}".format(tile['raw_tiles']))
bit_list = find_missing_tiles_no_all_1(self.tile_list,
self.rule["FCNSize"],
schcmsg.get_fcn_all_1(self.rule))
print('send ack before done {}'.format(bit_list))
assert bit_list is not None
if len(bit_list) == 0:
bit_list = find_missing_tiles_no_all_1(self.tile_list,
self.rule["FCNSize"],
schcmsg.get_fcn_all_1(self.rule))
for bl_index in range(len(bit_list)):
print("missing wn={} bitmap={}".format(bit_list[bl_index][0],
bit_list[bl_index][1]))
# XXX compress bitmap if needed.
# ACK failure message
schc_ack = schcmsg.frag_receiver_tx_all1_ack(
schc_frag.rule,
schc_frag.dtag,
win=bit_list[bl_index][0],
cbit=0,
bitmap=bit_list[bl_index][1])
if enable_statsct:
Statsct.set_msg_type("SCHC_ACK_KO")
print("----------------------- SCHC ACK KO SEND -----------------------")
print("ACK failure sent:", schc_ack.__dict__)
break
args = (schc_ack.packet.get_content(), self.context["devL2Addr"])
self.protocol.scheduler.add_event(0,
self.protocol.layer2.send_packet,
args)
def receive_frag(self, bbuf, dtag):
print('state: {}, recieved fragment -> {}, rule-> {}'.format(self.state,
bbuf, self.rule))
schc_frag = schcmsg.frag_receiver_rx(self.rule, bbuf)
print("receiver frag received:", schc_frag.__dict__)
# XXX how to authenticate the message from the peer. without
# authentication, any nodes can cancel the invactive timer.
self.cancel_inactive_timer()
if self.state == "ABORT":
self.send_receiver_abort()
return
#
#input("")
if schc_frag.abort == True:
print("Received Sender-Abort.")
#Statsct.set_msg_type("SCHC_SENDER_ABORT")
# XXX needs to release all resources.
return
if schc_frag.ack_request == True:
print("Received ACK-REQ")
# if self.state != "DONE":
# #this can happen when the ALL-1 is not received, so the state is
# #not done and the sender is requesting an ACK.
# # sending Receiver abort.
# schc_frag = schcmsg.frag_receiver_tx_abort(self.rule, self.dtag)
# args = (schc_frag.packet.get_content(), self.context["devL2Addr"])
# print("Sent Receiver-Abort.", schc_frag.__dict__)
# print("----------------------- SCHC RECEIVER ABORT SEND -----------------------")
# if enable_statsct:
# Statsct.set_msg_type("SCHC_RECEIVER_ABORT")
# #Statsct.set_header_size(schcmsg.get_sender_header_size(self.rule))
# self.protocol.scheduler.add_event(0,
# self.protocol.layer2.send_packet, args)
# # XXX needs to release all resources.
# return
print("XXX need sending ACK back.")
#input('')
self.resend_ack(schc_frag)
return
self.fragment_received = True
# append the payload to the tile list.
# padding truncation is done later. see below.
nb_tiles = schc_frag.payload.count_added_bits()//self.rule["tileSize"]
# Note that nb_tiles is the number of tiles which is exact number of the
# size of the tile. the tile of which the size is less than the size
# is not included.
# The tile that is less than a tile size must be included, so a 1 can be added
# in the bitmap when there is a tile in the all-1 message
if schc_frag.payload.count_added_bits()%self.rule["tileSize"] != 0:
#tile found that is smaller than a normal tile
print("tile found that is smaller than a normal tile")
nb_tiles = 1
#tile should only be append if it is not in the list
tile_in_list = False
for tile in self.tile_list:
if tile["w-num"] == schc_frag.win:
if tile["t-num"] == schc_frag.fcn:
print("tile is already in tile list")
tile_in_list = True
if not tile_in_list:
self.tile_list.append({
"w-num": schc_frag.win,
"t-num": schc_frag.fcn,
"nb_tiles": nb_tiles,
"raw_tiles":schc_frag.payload})
self.tile_list = sort_tile_list(self.tile_list, self.rule["FCNSize"])
for tile in self.tile_list:
print("w-num: {} t-num: {} nb_tiles:{}".format(
tile['w-num'],tile['t-num'],tile['nb_tiles']))
#print("raw_tiles:{}".format(tile['raw_tiles']))
#self.tile_list = sort_tile_list(self.tile_list, self.rule["WSize"])
# self.tile_list.append({
# "w-num": schc_frag.win,
# "t-num": schc_frag.fcn,
# "nb_tiles": nb_tiles,
# "raw_tiles":schc_frag.payload})
# self.tile_list = sort_tile_list(self.tile_list, self.rule["FCNSize"])
#self.tile_list = sort_tile_list(self.tile_list, self.rule["WSize"])
if self.mic_received is not None:
schc_packet, mic_calced = self.get_mic_from_tiles_received()
if self.mic_received == mic_calced:
self.finish(schc_packet, schc_frag)
return
else:
# XXX waiting for the fragments requested by ACK.
# during MAX_ACK_REQUESTS
print("waiting for more fragments.")
elif schc_frag.fcn == schcmsg.get_fcn_all_1(self.rule):
print("----------------------- ALL1 received -----------------------")
self.all1_received = True
#Statsct.set_msg_type("SCHC_ALL_1")
self.mic_received = schc_frag.mic
schc_packet, mic_calced = self.get_mic_from_tiles_received()
print("schc_frag.mic: {}, mic_calced: {}".format(schc_frag.mic,mic_calced))
if schc_frag.mic == mic_calced:
self.mic_missmatched = False
self.finish(schc_packet, schc_frag)
return
else:
self.mic_missmatched = True
print("----------------------- ERROR -----------------------")
print("ERROR: MIC mismatched. packet {} != result {}".format(
schc_frag.mic, mic_calced))
bit_list = find_missing_tiles_mic_ko_yes_all_1(self.tile_list,
self.rule["FCNSize"],
schcmsg.get_fcn_all_1(self.rule))
assert bit_list is not None
if len(bit_list) == 0:
#When the find_missing_tiles functions returns an empty array
#but we know something is missing because the MIC calculation is wrong
#this can happen when the first fragments are lost for example
print("bit list empty but the mic missmatched")
#if tiles are missing, then the packet is larger, should send a bitmap
#that considers the max_fcn and the tiles received
bit_list = find_missing_tiles_mic_ko_yes_all_1(self.tile_list,
self.rule["FCNSize"],
schcmsg.get_fcn_all_1(self.rule))
#print("new bit list, should it work???")
#input("")
for bl_index in range(len(bit_list)):
print("missing wn={} bitmap={}".format(bit_list[bl_index][0],
bit_list[bl_index][1]))
# XXX compress bitmap if needed.
# ACK failure message
schc_ack = schcmsg.frag_receiver_tx_all1_ack(
schc_frag.rule,
schc_frag.dtag,
win=bit_list[bl_index][0],
cbit=0,
bitmap=bit_list[bl_index][1])
if enable_statsct:
Statsct.set_msg_type("SCHC_ACK_KO")
print("----------------------- SCHC ACK KO SEND -----------------------")
print("ACK failure sent:", schc_ack.__dict__)
args = (schc_ack.packet.get_content(),
self.context["devL2Addr"])
self.protocol.scheduler.add_event(
0, self.protocol.layer2.send_packet, args)
# XXX need to keep the ack message for the ack request.
break
# set inactive timer.
self.event_id_inactive_timer = self.protocol.scheduler.add_event(
self.inactive_timer, self.event_inactive, tuple())
print("---", schc_frag.fcn)