forked from osmocom/wireshark
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Change-Id: I36b2731d67f9345d2fd0c23800bba7d2be94c387 Reviewed-on: https://code.wireshark.org/review/6008 Reviewed-by: Bill Meier <wmeier@newsguy.com>
538 lines
20 KiB
C
538 lines
20 KiB
C
/* packet-ansi_tcap-template.c
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* Routines for ANSI TCAP
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* Copyright 2007 Anders Broman <anders.broman@ericsson.com>
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* Built from the gsm-map dissector Copyright 2004 - 2005, Anders Broman <anders.broman@ericsson.com>
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*
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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* Copyright 1998 Gerald Combs
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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* References: T1.114
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*/
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#include "config.h"
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#include <epan/packet.h>
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#include <epan/prefs.h>
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#include <epan/expert.h>
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#include <epan/oids.h>
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#include <epan/asn1.h>
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#include <epan/strutil.h>
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#include "packet-ber.h"
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#include "packet-tcap.h"
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#include "packet-ansi_tcap.h"
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#define PNAME "ANSI Transaction Capabilities Application Part"
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#define PSNAME "ANSI_TCAP"
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#define PFNAME "ansi_tcap"
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void proto_register_ansi_tcap(void);
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void proto_reg_handoff_ansi_tcap(void);
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/* Preferences defaults */
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gint ansi_tcap_response_matching_type = 0;
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/* Initialize the protocol and registered fields */
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static int proto_ansi_tcap = -1;
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static int hf_ansi_tcapsrt_SessionId = -1;
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static int hf_ansi_tcapsrt_Duplicate = -1;
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static int hf_ansi_tcapsrt_BeginSession = -1;
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static int hf_ansi_tcapsrt_EndSession = -1;
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static int hf_ansi_tcapsrt_SessionTime = -1;
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static int hf_ansi_tcap_bit_h = -1;
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static int hf_ansi_tcap_op_family = -1;
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static int hf_ansi_tcap_op_specifier = -1;
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#include "packet-ansi_tcap-hf.c"
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/* Initialize the subtree pointers */
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static gint ett_tcap = -1;
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static gint ett_param = -1;
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static gint ett_ansi_tcap_op_code_nat = -1;
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static gint ett_otid = -1;
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static gint ett_dtid = -1;
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static gint ett_ansi_tcap_stat = -1;
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static expert_field ei_ansi_tcap_dissector_not_implemented = EI_INIT;
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static struct tcapsrt_info_t * gp_tcapsrt_info;
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static gboolean tcap_subdissector_used=FALSE;
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static struct tcaphash_context_t * gp_tcap_context=NULL;
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/* Note the high bit should be masked off when registering in this table (0x7fff)*/
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static dissector_table_t ansi_tcap_national_opcode_table; /* National Operation Codes */
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#include "packet-ansi_tcap-ett.c"
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#define MAX_SSN 254
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extern gboolean gtcap_PersistentSRT;
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extern guint gtcap_RepetitionTimeout;
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extern guint gtcap_LostTimeout;
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/* When several Tcap components are received in a single TCAP message,
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we have to use several buffers for the stored parameters
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because else this data are erased during TAP dissector call */
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#define MAX_TCAP_INSTANCE 10
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int tcapsrt_global_current=0;
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struct tcapsrt_info_t tcapsrt_global_info[MAX_TCAP_INSTANCE];
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static dissector_table_t ber_oid_dissector_table=NULL;
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static const char * cur_oid;
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static const char * tcapext_oid;
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static proto_tree * tcap_top_tree=NULL;
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static proto_tree * tcap_stat_tree=NULL;
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static proto_item * tcap_stat_item=NULL;
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static dissector_handle_t ansi_map_handle;
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struct ansi_tcap_private_t ansi_tcap_private;
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#define MAX_TID_STR_LEN 1024
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static void ansi_tcap_ctx_init(struct ansi_tcap_private_t *a_tcap_ctx) {
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memset(a_tcap_ctx, '\0', sizeof(*a_tcap_ctx));
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a_tcap_ctx->signature = ANSI_TCAP_CTX_SIGNATURE;
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a_tcap_ctx->oid_is_present = FALSE;
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a_tcap_ctx->TransactionID_str = NULL;
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}
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static const value_string ansi_tcap_national_op_code_family_vals[] = {
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{ 0x0, "All Families" },
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{ 0x1, "Parameter" },
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{ 0x2, "Charging" },
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{ 0x3, "Provide Instructions" },
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{ 0x4, "Connection Control" },
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{ 0x5, "Caller Interaction" },
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{ 0x6, "Send Notification" },
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{ 0x7, "Network Management" },
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{ 0x8, "Procedural" },
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{ 0x9, "Operation Control" },
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{ 0xa, "Report Event" },
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/* Spare */
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{ 0x7e, "Miscellaneous" },
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{ 0x7f, "Reserved" },
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{ 0, NULL }
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};
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static void dissect_ansi_tcap(tvbuff_t *tvb, packet_info *pinfo, proto_tree *parent_tree);
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/*
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static dissector_handle_t tcap_handle = NULL;
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static dissector_table_t sccp_ssn_table;
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static GHashTable* ansi_sub_dissectors = NULL;
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static GHashTable* itu_sub_dissectors = NULL;
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extern void add_ansi_tcap_subdissector(guint32 ssn, dissector_handle_t dissector) {
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g_hash_table_insert(ansi_sub_dissectors,GUINT_TO_POINTER(ssn),dissector);
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dissector_add_uint("sccp.ssn",ssn,tcap_handle);
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}
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extern void delete_ansi_tcap_subdissector(guint32 ssn, dissector_handle_t dissector _U_) {
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g_hash_table_remove(ansi_sub_dissectors,GUINT_TO_POINTER(ssn));
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dissector_delete_uint("sccp.ssn",ssn,tcap_handle);
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}
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dissector_handle_t get_ansi_tcap_subdissector(guint32 ssn) {
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return g_hash_table_lookup(ansi_sub_dissectors,GUINT_TO_POINTER(ssn));
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}
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*/
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/* Transaction tracking */
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/* Transaction table */
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struct ansi_tcap_invokedata_t {
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gint OperationCode;
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/*
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0 : national,
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1 : private
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*/
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gint32 OperationCode_private;
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gint32 OperationCode_national;
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};
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static GHashTable *TransactionId_table=NULL;
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static void
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ansi_tcap_init_transaction_table(void){
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/* Destroy any existing memory chunks / hashes. */
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if (TransactionId_table){
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g_hash_table_destroy(TransactionId_table);
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TransactionId_table = NULL;
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}
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TransactionId_table = g_hash_table_new(g_str_hash, g_str_equal);
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}
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static void
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ansi_tcap_init_protocol(void)
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{
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ansi_tcap_init_transaction_table();
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}
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/* Store Invoke information needed for the corresponding reply */
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static void
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save_invoke_data(packet_info *pinfo, proto_tree *tree _U_, tvbuff_t *tvb _U_){
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struct ansi_tcap_invokedata_t *ansi_tcap_saved_invokedata;
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gchar *src, *dst;
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char *buf;
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src = address_to_str(wmem_packet_scope(), &(pinfo->src));
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dst = address_to_str(wmem_packet_scope(), &(pinfo->dst));
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if ((!pinfo->fd->flags.visited)&&(ansi_tcap_private.TransactionID_str)){
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/* Only do this once XXX I hope it's the right thing to do */
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/* The hash string needs to contain src and dest to distiguish differnt flows */
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switch(ansi_tcap_response_matching_type){
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case 0:
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buf = wmem_strdup(wmem_packet_scope(), ansi_tcap_private.TransactionID_str);
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break;
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case 1:
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buf = wmem_strdup_printf(wmem_packet_scope(), "%s%s",ansi_tcap_private.TransactionID_str,src);
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break;
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default:
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buf = wmem_strdup_printf(wmem_packet_scope(), "%s%s%s",ansi_tcap_private.TransactionID_str,src,dst);
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break;
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}
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/* If the entry allready exists don't owervrite it */
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ansi_tcap_saved_invokedata = (struct ansi_tcap_invokedata_t *)g_hash_table_lookup(TransactionId_table,buf);
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if(ansi_tcap_saved_invokedata)
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return;
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ansi_tcap_saved_invokedata = wmem_new(wmem_file_scope(), struct ansi_tcap_invokedata_t);
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ansi_tcap_saved_invokedata->OperationCode = ansi_tcap_private.d.OperationCode;
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ansi_tcap_saved_invokedata->OperationCode_national = ansi_tcap_private.d.OperationCode_national;
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ansi_tcap_saved_invokedata->OperationCode_private = ansi_tcap_private.d.OperationCode_private;
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g_hash_table_insert(TransactionId_table,
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wmem_strdup(wmem_file_scope(), buf),
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ansi_tcap_saved_invokedata);
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/*
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g_warning("Tcap Invoke Hash string %s",buf);
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*/
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}
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}
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static gboolean
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find_saved_invokedata(packet_info *pinfo, proto_tree *tree _U_, tvbuff_t *tvb _U_){
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struct ansi_tcap_invokedata_t *ansi_tcap_saved_invokedata;
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gchar *src, *dst;
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char *buf;
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if (!ansi_tcap_private.TransactionID_str) {
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return FALSE;
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}
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src = address_to_str(wmem_packet_scope(), &(pinfo->src));
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dst = address_to_str(wmem_packet_scope(), &(pinfo->dst));
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/* The hash string needs to contain src and dest to distiguish differnt flows */
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buf = (char *)wmem_alloc(wmem_packet_scope(), MAX_TID_STR_LEN);
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buf[0] = '\0';
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/* Reverse order to invoke */
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switch(ansi_tcap_response_matching_type){
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case 0:
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g_snprintf(buf,MAX_TID_STR_LEN,"%s",ansi_tcap_private.TransactionID_str);
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break;
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case 1:
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g_snprintf(buf,MAX_TID_STR_LEN,"%s%s",ansi_tcap_private.TransactionID_str,dst);
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break;
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default:
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g_snprintf(buf,MAX_TID_STR_LEN,"%s%s%s",ansi_tcap_private.TransactionID_str,dst,src);
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break;
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}
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ansi_tcap_saved_invokedata = (struct ansi_tcap_invokedata_t *)g_hash_table_lookup(TransactionId_table, buf);
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if(ansi_tcap_saved_invokedata){
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ansi_tcap_private.d.OperationCode = ansi_tcap_saved_invokedata->OperationCode;
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ansi_tcap_private.d.OperationCode_national = ansi_tcap_saved_invokedata->OperationCode_national;
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ansi_tcap_private.d.OperationCode_private = ansi_tcap_saved_invokedata->OperationCode_private;
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return TRUE;
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}
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return FALSE;
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}
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/* As currently ANSI MAP is the only possible sub dissector this function
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* must be improved to handle general cases.
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*
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*
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*
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* TODO:
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* 1)Handle national codes
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* Design option
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* - Create a ansi.tcap.national dissector table and have dissectors for
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* national codes register there and let ansi tcap call them.
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* 2)Handle Private codes properly
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* Design question
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* Unclear how to differentiate between different private "code sets".
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* Use SCCP SSN table as before? or a ansi.tcap.private dissector table?
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*
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*/
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static gboolean
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find_tcap_subdissector(tvbuff_t *tvb, asn1_ctx_t *actx, proto_tree *tree){
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proto_item *item;
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/* If "DialoguePortion objectApplicationId ObjectIDApplicationContext
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* points to the subdissector this code can be used.
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*
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if(ansi_tcap_private.d.oid_is_present){
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call_ber_oid_callback(ansi_tcap_private.objectApplicationId_oid, tvb, 0, actx-pinfo, tree, NULL);
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return TRUE;
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}
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*/
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if(ansi_tcap_private.d.pdu == 1){
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/* Save Invoke data for this transaction */
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save_invoke_data(actx->pinfo, tree, tvb);
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}else{
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/* Get saved data for this transaction */
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if(find_saved_invokedata(actx->pinfo, tree, tvb)){
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if(ansi_tcap_private.d.OperationCode == 0){
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/* national */
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item = proto_tree_add_int(tree, hf_ansi_tcap_national, tvb, 0, 0, ansi_tcap_private.d.OperationCode_national);
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}else{
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item = proto_tree_add_int(tree, hf_ansi_tcap_private, tvb, 0, 0, ansi_tcap_private.d.OperationCode_private);
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}
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PROTO_ITEM_SET_GENERATED(item);
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ansi_tcap_private.d.OperationCode_item = item;
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}
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}
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if(ansi_tcap_private.d.OperationCode == 0){
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/* national */
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guint8 family = (ansi_tcap_private.d.OperationCode_national & 0x7f00)>>8;
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guint8 specifier = (guint8)(ansi_tcap_private.d.OperationCode_national & 0xff);
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if(!dissector_try_uint(ansi_tcap_national_opcode_table, ansi_tcap_private.d.OperationCode_national, tvb, actx->pinfo, tcap_top_tree)){
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proto_tree_add_expert_format(tree, actx->pinfo, &ei_ansi_tcap_dissector_not_implemented, tvb, 0, -1,
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"Dissector for ANSI TCAP NATIONAL code:0x%x(Family %u, Specifier %u) \n"
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"not implemented. Contact Wireshark developers if you want this supported(Spec required)",
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ansi_tcap_private.d.OperationCode_national, family, specifier);
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return FALSE;
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}
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return TRUE;
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}else if(ansi_tcap_private.d.OperationCode == 1){
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/* private */
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if((ansi_tcap_private.d.OperationCode_private & 0x0900) != 0x0900){
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proto_tree_add_expert_format(tree, actx->pinfo, &ei_ansi_tcap_dissector_not_implemented, tvb, 0, -1,
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"Dissector for ANSI TCAP PRIVATE code:%u not implemented.\n"
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"Contact Wireshark developers if you want this supported(Spec required)",
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ansi_tcap_private.d.OperationCode_private);
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return FALSE;
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}
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}
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/* This is abit of a hack as it assumes the private codes with a "family" of 0x09 is ANSI MAP
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* See TODO above.
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* N.S0005-0 v 1.0 TCAP Formats and Procedures 5-16 Application Services
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* 6.3.2 Component Portion
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* The Operation Code is partitioned into an Operation Family followed by a
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* Specifier associated with each Operation Family member. For TIA/EIA-41 the
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* Operation Family is coded as decimal 9. Bit H of the Operation Family is always
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* coded as 0.
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*/
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call_dissector_with_data(ansi_map_handle, tvb, actx->pinfo, tcap_top_tree, &ansi_tcap_private);
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return TRUE;
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}
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#include "packet-ansi_tcap-fn.c"
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static void
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dissect_ansi_tcap(tvbuff_t *tvb, packet_info *pinfo, proto_tree *parent_tree)
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{
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proto_item *item=NULL;
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proto_tree *tree=NULL;
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#if 0
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proto_item *stat_item=NULL;
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proto_tree *stat_tree=NULL;
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gint offset = 0;
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struct tcaphash_context_t * p_tcap_context;
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dissector_handle_t subdissector_handle;
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#endif
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asn1_ctx_t asn1_ctx;
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asn1_ctx_init(&asn1_ctx, ASN1_ENC_BER, TRUE, pinfo);
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ansi_tcap_ctx_init(&ansi_tcap_private);
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tcap_top_tree = parent_tree;
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col_set_str(pinfo->cinfo, COL_PROTOCOL, "ANSI TCAP");
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/* create display subtree for the protocol */
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if(parent_tree){
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item = proto_tree_add_item(parent_tree, proto_ansi_tcap, tvb, 0, -1, ENC_NA);
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tree = proto_item_add_subtree(item, ett_tcap);
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tcap_stat_item=item;
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tcap_stat_tree=tree;
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}
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cur_oid = NULL;
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tcapext_oid = NULL;
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gp_tcapsrt_info=tcapsrt_razinfo();
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tcap_subdissector_used=FALSE;
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gp_tcap_context=NULL;
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dissect_ansi_tcap_PackageType(FALSE, tvb, 0, &asn1_ctx, tree, -1);
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#if 0 /* Skip this part for now it will be rewritten */
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if (g_ansi_tcap_HandleSRT && !tcap_subdissector_used ) {
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if (gtcap_DisplaySRT && tree) {
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stat_tree = proto_tree_add_subtree(tree, tvb, 0, 0, ett_ansi_tcap_stat, &stat_item, "Stat");
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PROTO_ITEM_SET_GENERATED(stat_item);
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}
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p_tcap_context=tcapsrt_call_matching(tvb, pinfo, stat_tree, gp_tcapsrt_info);
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ansi_tcap_private.context=p_tcap_context;
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/* If the current message is TCAP only,
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* save the Application contexte name for the next messages
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*/
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if ( p_tcap_context && cur_oid && !p_tcap_context->oid_present ) {
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/* Save the application context and the sub dissector */
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g_strlcpy(p_tcap_context->oid, cur_oid, sizeof(p_tcap_context->oid));
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if ( (subdissector_handle = dissector_get_string_handle(ber_oid_dissector_table, cur_oid)) ) {
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p_tcap_context->subdissector_handle=subdissector_handle;
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p_tcap_context->oid_present=TRUE;
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}
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}
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if (g_ansi_tcap_HandleSRT && p_tcap_context && p_tcap_context->callback) {
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/* Callback fonction for the upper layer */
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(p_tcap_context->callback)(tvb, pinfo, stat_tree, p_tcap_context);
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}
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}
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#endif
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}
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void
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proto_reg_handoff_ansi_tcap(void)
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{
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ansi_map_handle = find_dissector("ansi_map");
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ber_oid_dissector_table = find_dissector_table("ber.oid");
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}
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|
|
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void
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proto_register_ansi_tcap(void)
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{
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module_t *ansi_tcap_module;
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|
|
|
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/* Setup list of header fields See Section 1.6.1 for details*/
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static hf_register_info hf[] = {
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/* Tcap Service Response Time */
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{ &hf_ansi_tcapsrt_SessionId,
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|
{ "Session Id",
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|
"ansi_tcap.srt.session_id",
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|
FT_UINT32, BASE_DEC, NULL, 0x0,
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|
NULL, HFILL }
|
|
},
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|
{ &hf_ansi_tcapsrt_BeginSession,
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|
{ "Begin Session",
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|
"ansi_tcap.srt.begin",
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|
FT_FRAMENUM, BASE_NONE, NULL, 0x0,
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|
"SRT Begin of Session", HFILL }
|
|
},
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|
{ &hf_ansi_tcapsrt_EndSession,
|
|
{ "End Session",
|
|
"ansi_tcap.srt.end",
|
|
FT_FRAMENUM, BASE_NONE, NULL, 0x0,
|
|
"SRT End of Session", HFILL }
|
|
},
|
|
{ &hf_ansi_tcapsrt_SessionTime,
|
|
{ "Session duration",
|
|
"ansi_tcap.srt.sessiontime",
|
|
FT_RELATIVE_TIME, BASE_NONE, NULL, 0x0,
|
|
"Duration of the TCAP session", HFILL }
|
|
},
|
|
{ &hf_ansi_tcapsrt_Duplicate,
|
|
{ "Request Duplicate",
|
|
"ansi_tcap.srt.duplicate",
|
|
FT_UINT32, BASE_DEC, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_ansi_tcap_bit_h,
|
|
{ "Require Reply", "ansi_tcap.req_rep",
|
|
FT_BOOLEAN, 16, NULL, 0x8000,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_ansi_tcap_op_family,
|
|
{ "Family",
|
|
"ansi_tcap.op_family",
|
|
FT_UINT16, BASE_DEC, VALS(ansi_tcap_national_op_code_family_vals), 0x7f00,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_ansi_tcap_op_specifier,
|
|
{ "Specifier",
|
|
"ansi_tcap.op_specifier",
|
|
FT_UINT16, BASE_DEC, NULL, 0x00ff,
|
|
NULL, HFILL }
|
|
},
|
|
#include "packet-ansi_tcap-hfarr.c"
|
|
};
|
|
|
|
/* Setup protocol subtree array */
|
|
static gint *ett[] = {
|
|
&ett_tcap,
|
|
&ett_param,
|
|
&ett_otid,
|
|
&ett_dtid,
|
|
&ett_ansi_tcap_stat,
|
|
&ett_ansi_tcap_op_code_nat,
|
|
#include "packet-ansi_tcap-ettarr.c"
|
|
};
|
|
|
|
static ei_register_info ei[] = {
|
|
{ &ei_ansi_tcap_dissector_not_implemented, { "ansi_tcap.dissector_not_implemented", PI_UNDECODED, PI_WARN, "Dissector not implemented", EXPFILL }},
|
|
};
|
|
|
|
expert_module_t* expert_ansi_tcap;
|
|
|
|
static const enum_val_t ansi_tcap_response_matching_type_values[] = {
|
|
{"Only Transaction ID will be used in Invoke/response matching", "Transaction ID only", 0},
|
|
{"Transaction ID and Source will be used in Invoke/response matching", "Transaction ID and Source", 1},
|
|
{"Transaction ID Source and Destination will be used in Invoke/response matching", "Transaction ID Source and Destination", 2},
|
|
{NULL, NULL, -1}
|
|
};
|
|
|
|
/* Register the protocol name and description */
|
|
proto_ansi_tcap = proto_register_protocol(PNAME, PSNAME, PFNAME);
|
|
register_dissector("ansi_tcap", dissect_ansi_tcap, proto_ansi_tcap);
|
|
|
|
/* Note the high bit should be masked off when registering in this table (0x7fff)*/
|
|
ansi_tcap_national_opcode_table = register_dissector_table("ansi_tcap.nat.opcode", "ANSI TCAP National Opcodes", FT_UINT16, BASE_DEC);
|
|
/* Required function calls to register the header fields and subtrees used */
|
|
proto_register_field_array(proto_ansi_tcap, hf, array_length(hf));
|
|
proto_register_subtree_array(ett, array_length(ett));
|
|
expert_ansi_tcap = expert_register_protocol(proto_ansi_tcap);
|
|
expert_register_field_array(expert_ansi_tcap, ei, array_length(ei));
|
|
|
|
ansi_tcap_module = prefs_register_protocol(proto_ansi_tcap, proto_reg_handoff_ansi_tcap);
|
|
|
|
prefs_register_enum_preference(ansi_tcap_module, "transaction.matchtype",
|
|
"Type of matching invoke/response",
|
|
"Type of matching invoke/response, risk of missmatch if loose matching choosen",
|
|
&ansi_tcap_response_matching_type, ansi_tcap_response_matching_type_values, FALSE);
|
|
|
|
register_init_routine(&ansi_tcap_init_protocol);
|
|
}
|