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tool/dump_pklg: report offset in case of invalid frame/error

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This commit is contained in:
Matthias Ringwald 2017-01-17 15:39:52 +01:00
parent b96c8f447a
commit 46b37c0b6a
1 changed files with 6 additions and 1 deletions
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7
tool/dump_pklg.py
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@ -41,6 +41,7 @@ if len(sys.argv) == 1:
infile = sys.argv[1] infile = sys.argv[1]
with open (infile, 'rb') as fin: with open (infile, 'rb') as fin:
pos = 0
try: try:
while True: while True:
len = read_net_32(fin) len = read_net_32(fin)
@ -48,7 +49,11 @@ with open (infile, 'rb') as fin:
ts_usec = read_net_32(fin) ts_usec = read_net_32(fin)
type = ord(fin.read(1)) type = ord(fin.read(1))
packet_len = len - 9; packet_len = len - 9;
if (packet_len > 66000):
print ("Error parsing pklg at offset %u (%x)." % (pos, pos))
break
packet = fin.read(packet_len) packet = fin.read(packet_len)
pos = pos + 4 + len
time = "[%s.%03u]" % (datetime.datetime.fromtimestamp(ts_sec).strftime("%Y-%m-%d %H:%M:%S"), ts_usec / 1000) time = "[%s.%03u]" % (datetime.datetime.fromtimestamp(ts_sec).strftime("%Y-%m-%d %H:%M:%S"), ts_usec / 1000)
if type == 0xfc: if type == 0xfc:
print time, "LOG", packet print time, "LOG", packet
@ -56,5 +61,5 @@ with open (infile, 'rb') as fin:
if type <= 0x03: if type <= 0x03:
print time, packet_types[type], as_hex(packet) print time, packet_types[type], as_hex(packet)
except TypeError: except TypeError:
exit(0) print ("Error parsing pklg at offset %u (%x)." % (pos, pos))