new: using wireshark manufacturers file instead of oui.dat (closes #303)

network/make_manuf.py

@@ -0,0 +1,63 @@
+#!/usr/bin/python
+import os
+import six
+import re
+import sys
+
+base = os.path.dirname(os.path.realpath(__file__))
+# "https://code.wireshark.org/review/gitweb?p=wireshark.git;a=blob_plain;f=manuf;hb=HEAD"
+
+with open(os.path.join(base, 'manuf.go.template')) as fp:
+    template = fp.read()
+
+with open(os.path.join(base, 'manuf')) as fp:
+    lines = [l.strip() for l in fp.readlines()]
+    lines = [l for l in lines if l != "" and l[0] != '#']    
+
+def get_mac_and_mask(mac):
+    # simple case 
+    if not "/" in mac:
+        mac_hex = mac.replace(":", '')
+        mask    = 48 - 4 * len(mac_hex)
+        mac_int = int(mac_hex, 16) << mask
+
+    # 00:1B:C5:00:00:00/36
+    else:
+        parts = mac.split("/")
+        mac_hex = parts[0].replace(":", '')
+        mask    = 48 - int(parts[1])
+        mac_int = int(mac_hex, 16) << mask 
+
+    return (mac_int, mask)
+
+index = {}
+
+for line in lines:
+    m = re.match( r'^([^\s]+)\s+([^\s]+)(.*)$', line, re.M)
+    parts = m.groups()
+    mac = parts[0]
+    short = parts[1]
+    manuf = parts[2].strip()
+    if manuf == "":
+        manuf  = short
+
+    m = re.match( r'^([^#]+)#.+$', manuf)
+    if m is not None:
+        manuf = m.groups()[0].strip()
+
+    mac_int, mask = get_mac_and_mask(mac)
+
+    key = "%d.%d" % ( mask, mac_int >> mask )
+    index[key] = manuf
+
+code = "map[string]string {\n"
+
+for key, vendor in six.iteritems(index):
+    code += "    \"%s\": \"%s\",\n" % ( key, vendor.replace( '"', '\\"' ))
+
+code += "}\n"
+
+code = template.replace('#MAP#', code)
+
+with open(os.path.join(base, 'manuf.go'), 'w+t') as fp:
+    fp.write(code)