asn1/s1ap/packet-s1ap-template.c

   1 /* packet-s1ap.c
   2  * Routines for E-UTRAN S1 Application Protocol (S1AP) packet dissection
   3  * Copyright 2007-2009, Anders Broman <anders.broman@ericsson.com>
   4  *
   5  * $Id$
   6  *
   7  * Wireshark - Network traffic analyzer
   8  * By Gerald Combs <gerald@wireshark.org>
   9  * Copyright 1998 Gerald Combs
  10  *
  11  * This program is free software; you can redistribute it and/or
  12  * modify it under the terms of the GNU General Public License
  13  * as published by the Free Software Foundation; either version 2
  14  * of the License, or (at your option) any later version.
  15  *
  16  * This program is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  * GNU General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU General Public License
  22  * along with this program; if not, write to the Free Software
  23  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  24  *
  25  * Based on the RANAP dissector
  26  *
  27  * References: 3GPP TS 36.413 V8.5.0 (2009-03)
  28  */
  29
  30 #ifdef HAVE_CONFIG_H
  31 # include "config.h"
  32 #endif
  33
  34 #include <glib.h>
  35 #include <epan/packet.h>
  36
  37 #include <stdio.h>
  38 #include <string.h>
  39 #include <ctype.h>
  40 #include <epan/strutil.h>
  41 #include <epan/asn1.h>
  42 #include <epan/prefs.h>
  43 #include <epan/sctpppids.h>
  44
  45 #include "packet-ber.h"
  46 #include "packet-per.h"
  47 #include "packet-e212.h"
  48 #include "packet-sccp.h"
  49
  50 #ifdef _MSC_VER
  51 /* disable: "warning C4146: unary minus operator applied to unsigned type, result still unsigned" */
  52 #pragma warning(disable:4146)
  53 #endif
  54
  55 #define PNAME  "S1 Application Protocol "
  56 #define PSNAME "S1AP"
  57 #define PFNAME "s1ap"
  58
  59 /* No SCTP port registered with IANA for S1AP yet */
  60 #define SCTP_PORT_S1AP  0
  61
  62 static dissector_handle_t nas_eps_handle;
  63
  64 #include "packet-s1ap-val.h"
  65
  66 /* Initialize the protocol and registered fields */
  67 static int proto_s1ap = -1;
  68
  69 static int hf_s1ap_transportLayerAddressIPv4 = -1;
  70 static int hf_s1ap_transportLayerAddressIPv6 = -1;
  71 #include "packet-s1ap-hf.c"
  72
  73 /* Initialize the subtree pointers */
  74 static int ett_s1ap = -1;
  75 static int ett_s1ap_TransportLayerAddress = -1;
  76
  77 #include "packet-s1ap-ett.c"
  78
  79 /* Global variables */
  80 static guint32 ProcedureCode;
  81 static guint32 ProtocolIE_ID;
  82 static guint32 ProtocolExtensionID;
  83 static guint gbl_s1apSctpPort=SCTP_PORT_S1AP;
  84
  85 /* Dissector tables */
  86 static dissector_table_t s1ap_ies_dissector_table;
  87 static dissector_table_t s1ap_ies_p1_dissector_table;
  88 static dissector_table_t s1ap_ies_p2_dissector_table;
  89 static dissector_table_t s1ap_extension_dissector_table;
  90 static dissector_table_t s1ap_proc_imsg_dissector_table;
  91 static dissector_table_t s1ap_proc_sout_dissector_table;
  92 static dissector_table_t s1ap_proc_uout_dissector_table;
  93
  94 static int dissect_ProtocolIEFieldValue(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree);
  95 /* Currently not used
  96 static int dissect_ProtocolIEFieldPairFirstValue(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree);
  97 static int dissect_ProtocolIEFieldPairSecondValue(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree);
  98 */
  99 static int dissect_ProtocolExtensionFieldExtensionValue(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree);
 100 static int dissect_InitiatingMessageValue(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree);
 101 static int dissect_SuccessfulOutcomeValue(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree);
 102 static int dissect_UnsuccessfulOutcomeValue(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree);
 103
 104 #include "packet-s1ap-fn.c"
 105
 106 static int dissect_ProtocolIEFieldValue(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
 107 {
 108   return (dissector_try_port(s1ap_ies_dissector_table, ProtocolIE_ID, tvb, pinfo, tree)) ? tvb_length(tvb) : 0;
 109 }
 110 /* Currently not used
 111 static int dissect_ProtocolIEFieldPairFirstValue(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
 112 {
 113   return (dissector_try_port(s1ap_ies_p1_dissector_table, ProtocolIE_ID, tvb, pinfo, tree)) ? tvb_length(tvb) : 0;
 114 }
 115
 116 static int dissect_ProtocolIEFieldPairSecondValue(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
 117 {
 118   return (dissector_try_port(s1ap_ies_p2_dissector_table, ProtocolIE_ID, tvb, pinfo, tree)) ? tvb_length(tvb) : 0;
 119 }
 120 */
 121
 122 static int dissect_ProtocolExtensionFieldExtensionValue(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
 123 {
 124   return (dissector_try_port(s1ap_extension_dissector_table, ProtocolExtensionID, tvb, pinfo, tree)) ? tvb_length(tvb) : 0;
 125 }
 126
 127 static int dissect_InitiatingMessageValue(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
 128 {
 129   return (dissector_try_port(s1ap_proc_imsg_dissector_table, ProcedureCode, tvb, pinfo, tree)) ? tvb_length(tvb) : 0;
 130 }
 131
 132 static int dissect_SuccessfulOutcomeValue(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
 133 {
 134   return (dissector_try_port(s1ap_proc_sout_dissector_table, ProcedureCode, tvb, pinfo, tree)) ? tvb_length(tvb) : 0;
 135 }
 136
 137 static int dissect_UnsuccessfulOutcomeValue(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
 138 {
 139   return (dissector_try_port(s1ap_proc_uout_dissector_table, ProcedureCode, tvb, pinfo, tree)) ? tvb_length(tvb) : 0;
 140 }
 141
 142
 143 static void
 144 dissect_s1ap(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
 145 {
 146         proto_item      *s1ap_item = NULL;
 147         proto_tree      *s1ap_tree = NULL;
 148
 149         /* make entry in the Protocol column on summary display */
 150         if (check_col(pinfo->cinfo, COL_PROTOCOL))
 151                 col_set_str(pinfo->cinfo, COL_PROTOCOL, "S1AP");
 152
 153         /* create the s1ap protocol tree */
 154         s1ap_item = proto_tree_add_item(tree, proto_s1ap, tvb, 0, -1, FALSE);
 155         s1ap_tree = proto_item_add_subtree(s1ap_item, ett_s1ap);
 156
 157         dissect_S1AP_PDU_PDU(tvb, pinfo, s1ap_tree);
 158 }
 159
 160 /*--- proto_reg_handoff_s1ap ---------------------------------------*/
 161 void
 162 proto_reg_handoff_s1ap(void)
 163 {
 164         static gboolean Initialized=FALSE;
 165         static dissector_handle_t s1ap_handle;
 166         static guint SctpPort;
 167
 168         if (!Initialized) {
 169                 s1ap_handle = find_dissector("s1ap");
 170                 nas_eps_handle = find_dissector("nas-eps");
 171                 dissector_add_handle("sctp.port", s1ap_handle);   /* for "decode-as"  */
 172                 dissector_add("sctp.ppi", S1AP_PAYLOAD_PROTOCOL_ID,   s1ap_handle);
 173                 Initialized=TRUE;
 174 #include "packet-s1ap-dis-tab.c"
 175         } else {
 176                 if (SctpPort != 0) {
 177                         dissector_delete("sctp.port", SctpPort, s1ap_handle);
 178                 }
 179         }
 180
 181         SctpPort=gbl_s1apSctpPort;
 182         if (SctpPort != 0) {
 183                 dissector_add("sctp.port", SctpPort, s1ap_handle);
 184         }
 185 }
 186
 187 /*--- proto_register_s1ap -------------------------------------------*/
 188 void proto_register_s1ap(void) {
 189
 190   /* List of fields */
 191
 192   static hf_register_info hf[] = {
 193     { &hf_s1ap_transportLayerAddressIPv4,
 194       { "transportLayerAddress(IPv4)", "s1ap.transportLayerAddressIPv4",
 195         FT_IPv4, BASE_NONE, NULL, 0,
 196         NULL, HFILL }},
 197     { &hf_s1ap_transportLayerAddressIPv6,
 198       { "transportLayerAddress(IPv6)", "s1ap.transportLayerAddressIPv6",
 199         FT_IPv4, BASE_NONE, NULL, 0,
 200         NULL, HFILL }},
 201
 202 #include "packet-s1ap-hfarr.c"
 203   };
 204
 205   /* List of subtrees */
 206   static gint *ett[] = {
 207                   &ett_s1ap,
 208                   &ett_s1ap_TransportLayerAddress,
 209 #include "packet-s1ap-ettarr.c"
 210   };
 211
 212   module_t *s1ap_module;
 213
 214   /* Register protocol */
 215   proto_s1ap = proto_register_protocol(PNAME, PSNAME, PFNAME);
 216   /* Register fields and subtrees */
 217   proto_register_field_array(proto_s1ap, hf, array_length(hf));
 218   proto_register_subtree_array(ett, array_length(ett));
 219
 220   /* Register dissector */
 221   register_dissector("s1ap", dissect_s1ap, proto_s1ap);
 222
 223   /* Register dissector tables */
 224   s1ap_ies_dissector_table = register_dissector_table("s1ap.ies", "S1AP-PROTOCOL-IES", FT_UINT32, BASE_DEC);
 225   s1ap_ies_p1_dissector_table = register_dissector_table("s1ap.ies.pair.first", "S1AP-PROTOCOL-IES-PAIR FirstValue", FT_UINT32, BASE_DEC);
 226   s1ap_ies_p2_dissector_table = register_dissector_table("s1ap.ies.pair.second", "S1AP-PROTOCOL-IES-PAIR SecondValue", FT_UINT32, BASE_DEC);
 227   s1ap_extension_dissector_table = register_dissector_table("s1ap.extension", "S1AP-PROTOCOL-EXTENSION", FT_UINT32, BASE_DEC);
 228   s1ap_proc_imsg_dissector_table = register_dissector_table("s1ap.proc.imsg", "S1AP-ELEMENTARY-PROCEDURE InitiatingMessage", FT_UINT32, BASE_DEC);
 229   s1ap_proc_sout_dissector_table = register_dissector_table("s1ap.proc.sout", "S1AP-ELEMENTARY-PROCEDURE SuccessfulOutcome", FT_UINT32, BASE_DEC);
 230   s1ap_proc_uout_dissector_table = register_dissector_table("s1ap.proc.uout", "S1AP-ELEMENTARY-PROCEDURE UnsuccessfulOutcome", FT_UINT32, BASE_DEC);
 231
 232   /* Register configuration options for ports */
 233   s1ap_module = prefs_register_protocol(proto_s1ap, proto_reg_handoff_s1ap);
 234
 235   prefs_register_uint_preference(s1ap_module, "sctp.port",
 236                                  "S1AP SCTP Port",
 237                                  "Set the SCTP port for S1AP messages",
 238                                  10,
 239                                  &gbl_s1apSctpPort);
 240
 241 }
 242
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