When dissecting IMSI handle the zero length tvb case, fixes "Malforme…

…d Packet: CAMEL (empty IMSI tag)" https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=9015 svn path=/trunk/; revision=51208
CTSRD-SOAAP · Aug 8, 2013 · 08d223e · 08d223e
1 parent fd4a111
commit 08d223e
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diff --git a/asn1/gsm_map/gsm_map.cnf b/asn1/gsm_map/gsm_map.cnf
@@ -232,6 +232,8 @@ MAP-DialoguePDU				B "0.4.0.0.1.1.1.1" "map-DialogueAS"
 
  if (!parameter_tvb)
 	return offset;
+ if(tvb_length(parameter_tvb)==0)
+     return offset;
 
  digit_str = unpack_digits(parameter_tvb, 0);
  proto_tree_add_string(tree, hf_gsm_map_TBCD_digits, parameter_tvb, 0, -1, digit_str);