def unmake_packet(whitened_payload_with_crc, whitener_offset=0, dewhitening=1, coder=None):
"""
Return (ok, payload)
@param whitened_payload_with_crc: string
@param whitener_offset offset into whitener string to use [0-16)
@param dewhitening: Turn whitener on or off
@type dewhitening: bool
"""
if dewhitening:
payload_with_crc = dewhiten(whitened_payload_with_crc, whitener_offset)
else:
payload_with_crc = whitened_payload_with_crc
if coder is not None:
try:
payload_with_crc = decode_rs(coder, payload_with_crc)
except:
payload_with_crc = "XXXXXXXXXX"
ok, payload = crc.check_crc32(payload_with_crc)
if 0:
print "payload_with_crc =", string_to_hex_list(payload_with_crc)
print "ok = %r, len(payload) = %d" % (ok, len(payload))
print "payload =", string_to_hex_list(payload)
return ok, payload
def unmake_packet(whitened_payload_with_crc, whitener_offset=0, dewhitening=True):
"""
Return (ok, payload)
@param whitened_payload_with_crc: string
"""
# Xu: Never dewhitening
'''
if dewhitening:
payload_with_crc = dewhiten(whitened_payload_with_crc, whitener_offset)
else:
payload_with_crc = (whitened_payload_with_crc)
'''
payload_with_crc = (whitened_payload_with_crc)
###############################
# Decoding here
#rx_pkt = payload_with_crc
#cccl = len(rx_pkt)
#ccnb = ccDecoder.cc3_nbytes(cccl, CCLEN)
#ccDecoder.cc3_decode(rx_pkt,cccl, CCLEN)
#rsbitstr = rx_pkt[0:ccnb]
rsbitstr = payload_with_crc
cl = len(rsbitstr)
nb = Decoder.cat_nbytes( cl )
Decoder.cat_decode(rsbitstr, cl)
ok, payload = crc.check_crc32(rsbitstr[0:nb])
##########################################################
# uncoded
#ok, payload = crc.check_crc32(payload_with_crc)
if 0:
print "payload_with_crc =", string_to_hex_list(payload_with_crc)
print "ok = %r, len(payload) = %d" % (ok, len(payload))
print "payload =", string_to_hex_list(payload)
return ok, payload
def unmake_packet(whitened_payload_with_crc, whitener_offset=0, dewhitening=True):
"""
Return (ok, payload)
@param whitened_payload_with_crc: string
"""
if dewhitening:
payload_with_crc = dewhiten(whitened_payload_with_crc, whitener_offset)
else:
payload_with_crc = (whitened_payload_with_crc)
ok, payload = crc.check_crc32(payload_with_crc)
if 0:
print "payload_with_crc =", string_to_hex_list(payload_with_crc)
print "ok = %r, len(payload) = %d" % (ok, len(payload))
print "payload =", string_to_hex_list(payload)
return ok, payload
def unmake_packet(whitened_payload_with_crc, whitener_offset=0, debug=False,
dewhitening=True, check_crc=True, repeat=1, interleave=None):
"""
Return (ok, payload)
Args:
whitened_payload_with_crc: string
whitener_offset: integer offset into whitener table
dewhitening: True if we should run this through the dewhitener
check_crc: True if we should check the CRC of the packet
"""
if dewhitening:
payload_with_crc = dewhiten(whitened_payload_with_crc, whitener_offset)
else:
payload_with_crc = (whitened_payload_with_crc)
if repeat > 1:
if interleave == 1:
payload_with_crc = fec.deinterleave(payload_with_crc, repeat)
elif interleave == 2:
payload_with_crc = fec.shuffle_decode(payload_with_crc)
payload_with_crc = fec.repeat_decode(payload_with_crc, repeat)
if check_crc:
ok, payload = crc.check_crc32(payload_with_crc)
else:
payload = payload_with_crc
ok = True
if debug:
print ""
print "payload_with_crc =", string_to_hex_list(payload_with_crc)
print "ok = %r, len(payload) = %d" % (ok, len(payload))
print "payload =", string_to_hex_list(payload)
print ""
return ok, payload
def unmake_packet(whitened_payload_with_crc, whitener_offset=0, dewhitening=True, coder=None):
"""
Return (ok, payload)
@param whitened_payload_with_crc: string
"""
if dewhitening:
payload_with_crc = dewhiten(whitened_payload_with_crc, whitener_offset)
else:
payload_with_crc = (whitened_payload_with_crc)
if coder is not None:
try:
payload_with_crc = decode_rs(coder, payload_with_crc)
except:
payload_with_crc = "XXXXXXXXXX"
ok, payload = crc.check_crc32(payload_with_crc)
if 0:
print "payload_with_crc =", string_to_hex_list(payload_with_crc)
print "ok = %r, len(payload) = %d" % (ok, len(payload))
print "payload =", string_to_hex_list(payload)
return ok, payload
def unmake_packet(whitened_payload_with_crc,
options,
use_coding=False, #added on 09/20/12
logging= -1, # deprecated
whitener_offset=0, dewhitening=True):
"""
Return (ok, payload)
@param whitened_payload_with_crc: string
"""
#changed payload_with_crc to payload_with_crc_and_rs_interleaved
if dewhitening:
payload_with_crc_and_rs_interleaved, success = dewhiten(whitened_payload_with_crc, whitener_offset)
else:
payload_with_crc_and_rs_interleaved = (whitened_payload_with_crc)
success=True
# check if dewhitening failed
if success:
#use_coding section copied from Thomas' ofdm_packet_util.py
#added by Tri on 09/20/2012
if use_coding:
#print "use_coding is activated on rx"
# Reed Solomon Variables
N = 8
K = 4 #if K is changed, copy it to benchmark_tx.py as well
#De-interleave
payload_with_crc_and_rs = ''
for n in range(0, len(payload_with_crc_and_rs_interleaved)/N, 1):
payload_with_crc_and_rs = payload_with_crc_and_rs + payload_with_crc_and_rs_interleaved[n:len(payload_with_crc_and_rs_interleaved):len(payload_with_crc_and_rs_interleaved)/N]
#Reed-Solomon Decode
rs_encoder = Codec(N,K)
payload_with_crc = ''
rs_ok = 1
for n in range(0, len(payload_with_crc_and_rs), N):
try:
decoded = rs_encoder.decode(payload_with_crc_and_rs[n:n+N]);
except:
decoded = ('0'*K,)
rs_ok = 0
payload_with_crc = payload_with_crc + decoded[0]
else:
payload_with_crc = payload_with_crc_and_rs_interleaved
rs_ok = True
crc_ok, payload = crc.check_crc32(payload_with_crc)
ok = crc_ok & rs_ok
if 0:
print "payload_with_crc =", string_to_hex_list(payload_with_crc)
print "ok = %r, len(payload) = %d" % (ok, len(payload))
print "payload =", string_to_hex_list(payload)
# whitening failed. Don't trust the payload at all and assume CRC failed
else:
payload=''
ok=False
return ok, payload
def unmake_packet(
whitened_payload_with_crc,
options,
use_coding=False, #added on 09/20/12
logging=-1, # deprecated
whitener_offset=0,
dewhitening=True):
"""
Return (ok, payload)
@param whitened_payload_with_crc: string
"""
#changed payload_with_crc to payload_with_crc_and_rs_interleaved
if dewhitening:
payload_with_crc_and_rs_interleaved, success = dewhiten(
whitened_payload_with_crc, whitener_offset)
else:
payload_with_crc_and_rs_interleaved = (whitened_payload_with_crc)
success = True
# check if dewhitening failed
if success:
#use_coding section copied from Thomas' ofdm_packet_util.py
#added by Tri on 09/20/2012
if use_coding:
#print "use_coding is activated on rx"
# Reed Solomon Variables
N = 8
K = 4 #if K is changed, copy it to benchmark_tx.py as well
#De-interleave
payload_with_crc_and_rs = ''
for n in range(0, len(payload_with_crc_and_rs_interleaved) / N, 1):
payload_with_crc_and_rs = payload_with_crc_and_rs + payload_with_crc_and_rs_interleaved[
n:len(payload_with_crc_and_rs_interleaved
):len(payload_with_crc_and_rs_interleaved) / N]
#Reed-Solomon Decode
rs_encoder = Codec(N, K)
payload_with_crc = ''
rs_ok = 1
for n in range(0, len(payload_with_crc_and_rs), N):
try:
decoded = rs_encoder.decode(payload_with_crc_and_rs[n:n +
N])
except:
decoded = ('0' * K, )
rs_ok = 0
payload_with_crc = payload_with_crc + decoded[0]
else:
payload_with_crc = payload_with_crc_and_rs_interleaved
rs_ok = True
crc_ok, payload = crc.check_crc32(payload_with_crc)
ok = crc_ok & rs_ok
if 0:
print "payload_with_crc =", string_to_hex_list(payload_with_crc)
print "ok = %r, len(payload) = %d" % (ok, len(payload))
print "payload =", string_to_hex_list(payload)
# whitening failed. Don't trust the payload at all and assume CRC failed
else:
payload = ''
ok = False
return ok, payload
