commit c14aab04326ab438304a0b0a87821b68359c7ebb
Author: Dario Lombardo <lomato () gmail com>
Date:   Wed Feb 4 10:25:16 2015 +0100

    TRY
    
    Change-Id: I03e592dd3d54fc0e1c4af09d5d5336dda93f950e

diff --git a/epan/packet.c b/epan/packet.c
index 2899b7d..d277596 100644
--- a/epan/packet.c
+++ b/epan/packet.c
@@ -43,6 +43,7 @@
 
 #include "addr_resolv.h"
 #include "tvbuff.h"
+#include "log.h"
 #include "epan_dissect.h"
 
 #include "wmem/wmem.h"
@@ -52,6 +53,7 @@
 #include <epan/stream.h>
 #include <epan/expert.h>
 #include <epan/range.h>
+#include <epan/proto.h>
 
 static gint proto_malformed = -1;
 static dissector_handle_t frame_handle = NULL;
@@ -2397,6 +2399,29 @@ call_dissector_with_data(dissector_handle_t handle, tvbuff_t *tvb,
 		call_dissector_work(data_handle, tvb, pinfo, tree, TRUE, NULL);
 		return tvb_length(tvb);
 	}
+
+	if (tree && tree->tree_data->visible && strncmp(handle->name, "frame", 5)) {
+		gchar* decoded;
+		guint length;
+		guint i;
+		guint byte;
+		guint bit;
+
+		length = tvb_captured_length(tvb);
+		decoded = proto_seek_undecoded_data(tree, length);
+
+		for (i = 0; i < length; i++) {
+			field_info* fi = proto_find_field_from_offset(tree, i, tvb);
+			byte = i / 8;
+			bit = i % 8;
+			if (!(decoded[byte] & ((1 << bit) & 0xFF)) && strncmp(fi->hfinfo->abbrev, "frame", 5)) {
+				g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_WARNING,
+					"Dissector %s incomplete: undecoded byte %u\n",
+					fi->hfinfo->abbrev, i);
+			}
+		}
+        }
+
 	return ret;
 }
 
diff --git a/epan/proto.c b/epan/proto.c
index e12f3b6..1cd1bc1 100644
--- a/epan/proto.c
+++ b/epan/proto.c
@@ -6940,6 +6940,36 @@ proto_find_field_from_offset(proto_tree *tree, guint offset, tvbuff_t *tvb)
 	return offsearch.finfo;
 }
 
+
+static gboolean
+check_for_undecoded(proto_node *node, const gpointer data)
+{
+	field_info *fi = PNODE_FINFO(node);
+	gchar* decoded = (gchar*)data;
+	gint i;
+	guint byte;
+	guint bit;
+
+	if (fi && fi->hfinfo->type != FT_PROTOCOL) {
+		for (i = fi->start; i < fi->start + fi->length; i++) {
+			byte = i / 8;
+			bit = i % 8;
+			decoded[byte] |= ((1 << bit) & 0xFF);
+		}
+	}
+
+	return FALSE;
+}
+
+gchar*
+proto_seek_undecoded_data(proto_tree *tree, guint length)
+{
+	gchar* decoded = (gchar*)wmem_alloc0(wmem_packet_scope(), length / 8 + 1);
+
+	proto_tree_traverse_pre_order(tree, check_for_undecoded, decoded);
+	return decoded;
+}
+
 /* Dumps the protocols in the registration database to stdout.	An independent
  * program can take this output and format it into nice tables or HTML or
  * whatever.
diff --git a/epan/proto.h b/epan/proto.h
index e9b4f10..fbd9728 100644
--- a/epan/proto.h
+++ b/epan/proto.h
@@ -2221,6 +2221,14 @@ proto_construct_match_selected_string(field_info *finfo, struct epan_dissect *ed
 WS_DLL_PUBLIC field_info*
 proto_find_field_from_offset(proto_tree *tree, guint offset, tvbuff_t *tvb);
 
+/** Find undecoded bytes in a tree
+ @param tree tree of interest
+ @param offset offset in the tvb
+ @param length the length of the frame
+ @return an array to be used as bitmap of decoded bytes */
+WS_DLL_PUBLIC gchar*
+proto_find_undecoded_data(proto_tree *tree, guint length);
+
 /** This function will dissect a sequence of bytes that describe a bitmask.
  @param tree the tree to append this item to
  @param tvb the tv buffer of the current data