tool/dump_tlv: primitive tlv dumper

tool/dump_tlv.py

@@ -0,0 +1,68 @@
+#!/usr/bin/env python
+# BlueKitchen GmbH (c) 2017
+
+# primitive dump for .tlv format
+
+import re
+import sys
+import time
+import datetime
+
+def read_net_32(f):
+    a = f.read(1)
+    if a == '':
+    	return -1
+    b = f.read(1)
+    if b == '':
+    	return -1
+    c = f.read(1)
+    if c == '':
+    	return -1
+    d = f.read(1)
+    if d == '':
+    	return -1
+    return ord(a) << 24 | ord(b) << 16 | ord(c) << 8 | ord(d)
+
+def as_hex(data):
+	str_list = []
+	for byte in data:
+	    str_list.append("{0:02x} ".format(ord(byte)))
+	return ''.join(str_list)
+
+if len(sys.argv) == 1:
+	print 'Dump TLV file'
+	print 'Copyright 2017, BlueKitchen GmbH'
+	print ''
+	print 'Usage: ', sys.argv[0], 'file.tlv'
+	exit(0)
+
+infile = sys.argv[1]
+
+with open (infile, 'rb') as fin:
+	pos = 0
+	try:
+		# check header
+		magic_0 = read_net_32(fin)
+		magic_1 = read_net_32(fin)
+		if magic_0 != 0x42547374 or magic_1 != 0x61636b00:
+			print("%x" % magic_0)
+			print("%x" % magic_1)
+			print ("Not a valid BTstack .tlv file\n")
+			exit(0)
+		pos += 8
+		print("Valid .tlv file")
+		while True:
+			tag     = read_net_32(fin)
+			if tag < 0:
+				break
+			pos += 4
+			len     = read_net_32(fin)
+			pos += 4
+			packet  = fin.read(len)
+			pos += len
+			print('%04x' % tag + as_hex(packet))
+		print("Done")
+
+	except TypeError:
+		print ("Error parsing tlv at offset %u (%x)." % (pos, pos))
+