Avoid ASN.1 frame.protocols duplication.

Some of the ASN.1 dissectors process their data indirectly through
dissector tables. Add dissector_try_string_new so that they can do so
without appending duplicate entries to frame.protocols.

Change-Id: If9e12d81f9d0cc5b3bf19816e675a0fb79d904a6
Reviewed-on: https://code.wireshark.org/review/24886
Reviewed-by: Gerald Combs <gerald@wireshark.org>
Petri-Dish: Gerald Combs <gerald@wireshark.org>
Tested-by: Petri Dish Buildbot
Reviewed-by: Michael Mann <mmann78@netscape.net>

12 files changed, 39 insertions, 62 deletions

diff --git a/epan/dissectors/asn1/h225/h225.cnf b/epan/dissectors/asn1/h225/h225.cnf
index 05bf1c3de6..d9a9cfe2a6 100644
--- a/epan/dissectors/asn1/h225/h225.cnf
+++ b/epan/dissectors/asn1/h225/h225.cnf
@@ -865,7 +865,7 @@ H221NonStandard/manufacturerCode  VAL_PTR = &manufacturerCode
   if (gefx) {
     ti = proto_tree_add_string(tree, hf_h225_debug_dissector_try_string, tvb, offset>>3, 0, gefx->key);
   PROTO_ITEM_SET_HIDDEN(ti);
-    dissector_try_string(gef_name_dissector_table, gefx->key, tvb_new_subset_length_caplen(tvb, offset>>3, 0, 0), actx->pinfo, tree, actx);
+    dissector_try_string_new(gef_name_dissector_table, gefx->key, tvb_new_subset_length_caplen(tvb, offset>>3, 0, 0), actx->pinfo, tree, FALSE, actx);
   }
   actx->private_data = gefx;  /* subdissector could overwrite it */
 #.END
diff --git a/epan/dissectors/asn1/h245/h245.cnf b/epan/dissectors/asn1/h245/h245.cnf
index 2dabaaf9ff..e4425a83de 100644
--- a/epan/dissectors/asn1/h245/h245.cnf
+++ b/epan/dissectors/asn1/h245/h245.cnf
@@ -715,7 +715,7 @@ if (h245_pi != NULL)
   if (gefx) {
     ti = proto_tree_add_string(tree, hf_h245_debug_dissector_try_string, tvb, offset>>3, 0, gefx->key);
 	PROTO_ITEM_SET_HIDDEN(ti);
-    dissector_try_string(gef_name_dissector_table, gefx->key, tvb_new_subset_length_caplen(tvb, offset>>3, 0, 0), actx->pinfo, tree, actx);
+    dissector_try_string_new(gef_name_dissector_table, gefx->key, tvb_new_subset_length_caplen(tvb, offset>>3, 0, 0), actx->pinfo, tree, FALSE, actx);
   }
   actx->private_data = gefx;  /* subdissector could overwrite it */
 #.END
@@ -745,7 +745,7 @@ if (h245_pi != NULL)
     ti = proto_tree_add_string(tree, hf_h245_debug_dissector_try_string, tvb, offset>>3, 0, gefx->key);
 	PROTO_ITEM_SET_HIDDEN(ti);
     add_new_data_source(%(ACTX)s->pinfo, value_tvb, "booleanArray");
-    dissector_try_string(gef_content_dissector_table, gefx->key, value_tvb, %(ACTX)s->pinfo, %(TREE)s, %(ACTX)s);
+    dissector_try_string_new(gef_content_dissector_table, gefx->key, value_tvb, %(ACTX)s->pinfo, %(TREE)s, FALSE, %(ACTX)s);
   }
 #.END
 #.FN_BODY ParameterValue/unsignedMin  VAL_PTR = &value
diff --git a/epan/dissectors/asn1/ldap/ldap.cnf b/epan/dissectors/asn1/ldap/ldap.cnf
index e986db7fe9..e4617d859e 100644
--- a/epan/dissectors/asn1/ldap/ldap.cnf
+++ b/epan/dissectors/asn1/ldap/ldap.cnf
@@ -464,7 +464,7 @@ ldap_conv_info_t *ldap_info;
     proto_tree_add_item (tree, *hf_id, next_tvb, 0, tvb_reported_length_remaining(next_tvb, 0), ENC_UTF_8|ENC_NA);
 
   /* if we have an attribute type that isn't binary see if there is a better dissector */
-  else if(!attr_type || !next_tvb || !dissector_try_string(ldap_name_dissector_table, attr_type, next_tvb, actx->pinfo, tree, NULL)) {
+  else if(!attr_type || !next_tvb || !dissector_try_string_new(ldap_name_dissector_table, attr_type, next_tvb, actx->pinfo, tree, FALSE, NULL)) {
     offset = old_offset;
 
     /* do the default thing */
diff --git a/epan/dissectors/asn1/qsig/qsig.cnf b/epan/dissectors/asn1/qsig/qsig.cnf
index 2fd438c23f..abdd580b96 100644
--- a/epan/dissectors/asn1/qsig/qsig.cnf
+++ b/epan/dissectors/asn1/qsig/qsig.cnf
@@ -146,7 +146,7 @@ NameData TYPE = FT_STRING  DISPLAY = BASE_NONE
     tvbuff_t *next_tvb;
 
     next_tvb = tvb_new_subset_remaining(tvb, offset);
-    if (!dissector_try_string(extension_dissector_table, extension_oid, next_tvb, actx->pinfo, tree, NULL)) {
+    if (!dissector_try_string_new(extension_dissector_table, extension_oid, next_tvb, actx->pinfo, tree, FALSE, NULL)) {
         proto_tree *next_tree;
 
         next_tree=proto_tree_add_subtree_format(tree, next_tvb, 0, -1, ett_qsig_unknown_extension, NULL,
diff --git a/epan/dissectors/asn1/t124/t124.cnf b/epan/dissectors/asn1/t124/t124.cnf
index e3a8efa507..363bbcc6f2 100644
--- a/epan/dissectors/asn1/t124/t124.cnf
+++ b/epan/dissectors/asn1/t124/t124.cnf
@@ -156,7 +156,7 @@ RegistryAllocateHandleResponse/result	AllocateHandleResponseResult
 
 	ns = tvb_get_string_enc(wmem_packet_scope(), t124NSIdentifier, 0, tvb_reported_length(t124NSIdentifier), ENC_ASCII|ENC_NA);
 	if(ns != NULL) {
-		dissector_try_string(t124_ns_dissector_table, ns, next_tvb, actx->pinfo, top_tree, NULL);
+		dissector_try_string_new(t124_ns_dissector_table, ns, next_tvb, actx->pinfo, top_tree, FALSE, NULL);
 	}
 	}
 
@@ -169,7 +169,7 @@ RegistryAllocateHandleResponse/result	AllocateHandleResponseResult
 
 	if(next_tvb) {
 
-	     dissector_try_uint(t124_sd_dissector_table, channelId, next_tvb, actx->pinfo, top_tree);
+	     dissector_try_uint_new(t124_sd_dissector_table, channelId, next_tvb, actx->pinfo, top_tree, FALSE, NULL);
 
 	}
 
diff --git a/epan/dissectors/packet-h225.c b/epan/dissectors/packet-h225.c
index daa879b83e..65fe553597 100644
--- a/epan/dissectors/packet-h225.c
+++ b/epan/dissectors/packet-h225.c
@@ -3899,7 +3899,7 @@ dissect_h225_GenericIdentifier(tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *ac
   if (gefx) {
     ti = proto_tree_add_string(tree, hf_h225_debug_dissector_try_string, tvb, offset>>3, 0, gefx->key);
   PROTO_ITEM_SET_HIDDEN(ti);
-    dissector_try_string(gef_name_dissector_table, gefx->key, tvb_new_subset_length_caplen(tvb, offset>>3, 0, 0), actx->pinfo, tree, actx);
+    dissector_try_string_new(gef_name_dissector_table, gefx->key, tvb_new_subset_length_caplen(tvb, offset>>3, 0, 0), actx->pinfo, tree, FALSE, actx);
   }
   actx->private_data = gefx;  /* subdissector could overwrite it */
 
diff --git a/epan/dissectors/packet-h245.c b/epan/dissectors/packet-h245.c
index a489278dcb..451e3c2462 100644
--- a/epan/dissectors/packet-h245.c
+++ b/epan/dissectors/packet-h245.c
@@ -3688,7 +3688,7 @@ dissect_h245_ParameterIdentifier(tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *
   if (gefx) {
     ti = proto_tree_add_string(tree, hf_h245_debug_dissector_try_string, tvb, offset>>3, 0, gefx->key);
 	PROTO_ITEM_SET_HIDDEN(ti);
-    dissector_try_string(gef_name_dissector_table, gefx->key, tvb_new_subset_length_caplen(tvb, offset>>3, 0, 0), actx->pinfo, tree, actx);
+    dissector_try_string_new(gef_name_dissector_table, gefx->key, tvb_new_subset_length_caplen(tvb, offset>>3, 0, 0), actx->pinfo, tree, FALSE, actx);
   }
   actx->private_data = gefx;  /* subdissector could overwrite it */
 
@@ -3717,7 +3717,7 @@ dissect_h245_T_booleanArray(tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx
     ti = proto_tree_add_string(tree, hf_h245_debug_dissector_try_string, tvb, offset>>3, 0, gefx->key);
 	PROTO_ITEM_SET_HIDDEN(ti);
     add_new_data_source(actx->pinfo, value_tvb, "booleanArray");
-    dissector_try_string(gef_content_dissector_table, gefx->key, value_tvb, actx->pinfo, tree, actx);
+    dissector_try_string_new(gef_content_dissector_table, gefx->key, value_tvb, actx->pinfo, tree, FALSE, actx);
   }
 
 
diff --git a/epan/dissectors/packet-ldap.c b/epan/dissectors/packet-ldap.c
index fafd29277b..67c3414af0 100644
--- a/epan/dissectors/packet-ldap.c
+++ b/epan/dissectors/packet-ldap.c
@@ -15,19 +15,7 @@
  * By Gerald Combs <gerald@wireshark.org>
  * Copyright 1998 Gerald Combs
  *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version 2
- * of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ * SPDX-License-Identifier: GPL-2.0+
  */
 
 /*
@@ -345,7 +333,7 @@ static int hf_ldap_graceAuthNsRemaining = -1;     /* INTEGER_0_maxInt */
 static int hf_ldap_error = -1;                    /* T_error */
 
 /*--- End of included file: packet-ldap-hf.c ---*/
-#line 195 "./asn1/ldap/packet-ldap-template.c"
+#line 183 "./asn1/ldap/packet-ldap-template.c"
 
 /* Initialize the subtree pointers */
 static gint ett_ldap = -1;
@@ -417,7 +405,7 @@ static gint ett_ldap_PasswordPolicyResponseValue = -1;
 static gint ett_ldap_T_warning = -1;
 
 /*--- End of included file: packet-ldap-ett.c ---*/
-#line 207 "./asn1/ldap/packet-ldap-template.c"
+#line 195 "./asn1/ldap/packet-ldap-template.c"
 
 static expert_field ei_ldap_exceeded_filter_length = EI_INIT;
 static expert_field ei_ldap_too_many_filter_elements = EI_INIT;
@@ -2369,7 +2357,7 @@ dissect_ldap_AttributeValue(gboolean implicit_tag _U_, tvbuff_t *tvb _U_, int of
     proto_tree_add_item (tree, *hf_id, next_tvb, 0, tvb_reported_length_remaining(next_tvb, 0), ENC_UTF_8|ENC_NA);
 
   /* if we have an attribute type that isn't binary see if there is a better dissector */
-  else if(!attr_type || !next_tvb || !dissector_try_string(ldap_name_dissector_table, attr_type, next_tvb, actx->pinfo, tree, NULL)) {
+  else if(!attr_type || !next_tvb || !dissector_try_string_new(ldap_name_dissector_table, attr_type, next_tvb, actx->pinfo, tree, FALSE, NULL)) {
     offset = old_offset;
 
     /* do the default thing */
@@ -3827,7 +3815,7 @@ static int dissect_PasswordPolicyResponseValue_PDU(tvbuff_t *tvb _U_, packet_inf
 
 
 /*--- End of included file: packet-ldap-fn.c ---*/
-#line 913 "./asn1/ldap/packet-ldap-template.c"
+#line 901 "./asn1/ldap/packet-ldap-template.c"
 static int dissect_LDAPMessage_PDU(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, ldap_conv_info_t *ldap_info) {
 
   int offset = 0;
@@ -5638,7 +5626,7 @@ void proto_register_ldap(void) {
         NULL, HFILL }},
 
 /*--- End of included file: packet-ldap-hfarr.c ---*/
-#line 2155 "./asn1/ldap/packet-ldap-template.c"
+#line 2143 "./asn1/ldap/packet-ldap-template.c"
   };
 
   /* List of subtrees */
@@ -5712,7 +5700,7 @@ void proto_register_ldap(void) {
     &ett_ldap_T_warning,
 
 /*--- End of included file: packet-ldap-ettarr.c ---*/
-#line 2169 "./asn1/ldap/packet-ldap-template.c"
+#line 2157 "./asn1/ldap/packet-ldap-template.c"
   };
   /* UAT for header fields */
   static uat_field_t custom_attribute_types_uat_fields[] = {
@@ -5900,7 +5888,7 @@ proto_reg_handoff_ldap(void)
 
 
 /*--- End of included file: packet-ldap-dis-tab.c ---*/
-#line 2340 "./asn1/ldap/packet-ldap-template.c"
+#line 2328 "./asn1/ldap/packet-ldap-template.c"
 
  dissector_add_uint_range_with_preference("tcp.port", TCP_PORT_RANGE_LDAP, ldap_handle);
 }
diff --git a/epan/dissectors/packet-qsig.c b/epan/dissectors/packet-qsig.c
index feecaa1927..90498d9cd3 100644
--- a/epan/dissectors/packet-qsig.c
+++ b/epan/dissectors/packet-qsig.c
@@ -2078,7 +2078,7 @@ dissect_qsig_T_extensionArgument(gboolean implicit_tag _U_, tvbuff_t *tvb _U_, i
     tvbuff_t *next_tvb;
 
     next_tvb = tvb_new_subset_remaining(tvb, offset);
-    if (!dissector_try_string(extension_dissector_table, extension_oid, next_tvb, actx->pinfo, tree, NULL)) {
+    if (!dissector_try_string_new(extension_dissector_table, extension_oid, next_tvb, actx->pinfo, tree, FALSE, NULL)) {
         proto_tree *next_tree;
 
         next_tree=proto_tree_add_subtree_format(tree, next_tvb, 0, -1, ett_qsig_unknown_extension, NULL,
diff --git a/epan/dissectors/packet-t124.c b/epan/dissectors/packet-t124.c
index b0027b2f06..dad87c274b 100644
--- a/epan/dissectors/packet-t124.c
+++ b/epan/dissectors/packet-t124.c
@@ -582,7 +582,7 @@ dissect_t124_T_value(tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, pr
 
 	ns = tvb_get_string_enc(wmem_packet_scope(), t124NSIdentifier, 0, tvb_reported_length(t124NSIdentifier), ENC_ASCII|ENC_NA);
 	if(ns != NULL) {
-		dissector_try_string(t124_ns_dissector_table, ns, next_tvb, actx->pinfo, top_tree, NULL);
+		dissector_try_string_new(t124_ns_dissector_table, ns, next_tvb, actx->pinfo, top_tree, FALSE, NULL);
 	}
 	}
 
@@ -2428,7 +2428,7 @@ dissect_t124_T_userData(tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_,
 
 	if(next_tvb) {
 
-	     dissector_try_uint(t124_sd_dissector_table, channelId, next_tvb, actx->pinfo, top_tree);
+	     dissector_try_uint_new(t124_sd_dissector_table, channelId, next_tvb, actx->pinfo, top_tree, FALSE, NULL);
 
 	}
 
diff --git a/epan/packet.c b/epan/packet.c
index 7c9bb1ece5..68f41fc0d6 100644
--- a/epan/packet.c
+++ b/epan/packet.c
@@ -5,19 +5,7 @@
  * By Gerald Combs <gerald@wireshark.org>
  * Copyright 1998 Gerald Combs
  *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version 2
- * of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ * SPDX-License-Identifier: GPL-2.0+
  */
 
 #include "config.h"
@@ -1624,8 +1612,8 @@ dissector_reset_string(const char *name, const gchar *pattern)
    the dissector with the arguments supplied, and return length of dissected data,
    otherwise return 0. */
 int
-dissector_try_string(dissector_table_t sub_dissectors, const gchar *string,
-		     tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data)
+dissector_try_string_new(dissector_table_t sub_dissectors, const gchar *string,
+		     tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, const gboolean add_proto_name, void *data)
 {
 	dtbl_entry_t            *dtbl_entry;
 	struct dissector_handle *handle;
@@ -1656,7 +1644,7 @@ dissector_try_string(dissector_table_t sub_dissectors, const gchar *string,
 		 */
 		saved_match_string = pinfo->match_string;
 		pinfo->match_string = string;
-		len = call_dissector_work(handle, tvb, pinfo, tree, TRUE, data);
+		len = call_dissector_work(handle, tvb, pinfo, tree, add_proto_name, data);
 		pinfo->match_string = saved_match_string;
 
 		/*
@@ -1677,6 +1665,13 @@ dissector_try_string(dissector_table_t sub_dissectors, const gchar *string,
 	return 0;
 }
 
+int
+dissector_try_string(dissector_table_t sub_dissectors, const gchar *string,
+		     tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data)
+{
+	return dissector_try_string_new(sub_dissectors, string, tvb, pinfo, tree, TRUE, data);
+}
+
 /* Look for a given value in a given string dissector table and, if found,
    return the dissector handle for that value. */
 dissector_handle_t
diff --git a/epan/packet.h b/epan/packet.h
index 67ed2471b5..e96375e509 100644
--- a/epan/packet.h
+++ b/epan/packet.h
@@ -5,19 +5,7 @@
  * By Gerald Combs <gerald@wireshark.org>
  * Copyright 1998 Gerald Combs
  *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version 2
- * of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ * SPDX-License-Identifier: GPL-2.0+
  */
 
 #ifndef __PACKET_H__
@@ -303,6 +291,12 @@ WS_DLL_PUBLIC void dissector_reset_string(const char *name, const gchar *pattern
 WS_DLL_PUBLIC int dissector_try_string(dissector_table_t sub_dissectors,
     const gchar *string, tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data);
 
+/* Look for a given string in a given dissector table and, if found, call
+   the dissector with the arguments supplied, and return the number of
+   bytes consumed, otherwise return 0. */
+WS_DLL_PUBLIC int dissector_try_string_new(dissector_table_t sub_dissectors,
+    const gchar *string, tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, const gboolean add_proto_name,void *data);
+
 /** Look for a given value in a given string dissector table and, if found,
  * return the current dissector handle for that value.
  *