Index: wireshark/epan/dissectors/packet-gsm_ipa.c
===================================================================
--- wireshark.orig/epan/dissectors/packet-gsm_ipa.c
+++ wireshark/epan/dissectors/packet-gsm_ipa.c
@@ -39,6 +39,7 @@
 
 static int hf_ipa_data_len = -1;
 static int hf_ipa_protocol = -1;
+static int hf_ipa_hsl_debug = -1;
 
 static int hf_ipaccess_msgtype = -1;
 static int hf_ipaccess_attr_tag = -1;
@@ -70,6 +71,7 @@
 #define AIP_SCCP	0xfd
 #define ABISIP_IPACCESS	0xfe
 #define ABISIP_OML	0xff
+#define HSL_DEBUG	0xdd
 
 static const value_string ipa_protocol_vals[] = {
 	{ 0x00,		"RSL" },
@@ -77,6 +79,7 @@
 	{ 0xfd,		"SCCP" },
 	{ 0xfe,		"IPA" },
 	{ 0xff,		"OML" },
+	{ 0xdd,		"HSL Debug" },
 	{ 0, 		NULL }
 };
 
@@ -184,7 +187,7 @@
 
 	while ((remaining = tvb_reported_length_remaining(tvb, offset)) > 0) {
 		proto_item *ti;
-		proto_tree *ipa_tree;
+		proto_tree *ipa_tree = NULL;
 		guint16 len, msg_type;
 		tvbuff_t *next_tvb;
 
@@ -238,6 +241,13 @@
 			/* hand this off to the standard MGCP dissector */
 			call_dissector(sub_handles[SUB_MGCP], next_tvb, pinfo, tree);
 			break;
+		case HSL_DEBUG:
+			if (tree) {
+				proto_tree_add_item(ipa_tree, hf_ipa_hsl_debug, next_tvb, 0, len, FALSE);
+				proto_tree_add_item(tree, hf_ipa_hsl_debug, next_tvb, 0, len, FALSE);
+			}
+			col_append_fstr(pinfo->cinfo, COL_INFO, "%s ", tvb_get_stringz(next_tvb, 0, NULL));
+			break;
 		default:
 			if (msg_type < ABISIP_RSL_MAX) {
 				/* hand this off to the standard A-bis RSL dissector */
@@ -262,6 +272,11 @@
 		  FT_UINT8, BASE_HEX, VALS(ipa_protocol_vals), 0x0,
 		  "The IPA Sub-Protocol", HFILL}
 		 },
+		{&hf_ipa_hsl_debug,
+		 {"Debug Message", "ipa.hsl_debug",
+		  FT_STRING, BASE_NONE, NULL, 0,
+		  NULL, HFILL}
+		},
 	};
 	static hf_register_info hf_ipa[] = {
 		{&hf_ipaccess_msgtype,