818 lines
30 KiB
C
818 lines
30 KiB
C
/* Routines for 'Metadata' disassembly
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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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* SPDX-License-Identifier: GPL-2.0-or-later
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*/
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#include "config.h"
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#include <epan/packet.h>
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#include <wiretap/wtap.h>
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#include <epan/expert.h>
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#include <epan/proto_data.h>
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#include "packet-sscop.h"
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#include "packet-gsm_a_common.h"
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void proto_register_meta(void);
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void proto_reg_handoff_meta(void);
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/* schemas */
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#define META_SCHEMA_PCAP 1
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#define META_SCHEMA_DXT 2
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/* protocols */
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#define META_PROTO_DXT_ETHERNET 1
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#define META_PROTO_DXT_ETHERNET_CRC 36
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#define META_PROTO_DXT_ATM 41
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#define META_PROTO_DXT_ERF_AAL5 49
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#define META_PROTO_DXT_M3UA 61
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#define META_PROTO_DXT_NBAP 69
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#define META_PROTO_DXT_ATM_AAL2 76
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#define META_PROTO_DXT_FP_HINT 82
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#define META_PROTO_DXT_HDLC 106
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#define META_PROTO_DXT_CONTAINER 127
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#define META_PROTO_DXT_FP_CAPTURE 193
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#define META_PROTO_DXT_UTRAN_CAPSULE 194
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/* data types */
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#define META_TYPE_NONE 0
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#define META_TYPE_BOOLEAN 1
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#define META_TYPE_UINT8 2
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#define META_TYPE_UINT16 3
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#define META_TYPE_UINT32 4
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#define META_TYPE_UINT64 5
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#define META_TYPE_STRING 16
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/* item ids */
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#define META_ID_NULL 0
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#define META_ID_DIRECTION 1
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#define META_ID_SIGNALING 2
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#define META_ID_INCOMPLETE 3
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#define META_ID_DECIPHERED 4
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#define META_ID_PAYLOADCUT 5
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#define META_ID_TIMESTAMP64 6
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#define META_ID_AAL5PROTO 7
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#define META_ID_PHYLINKID 256
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#define META_ID_LOCALDEVID 257
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#define META_ID_REMOTEDEVID 258
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#define META_ID_TAPGROUPID 259
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#define META_ID_IMSI 1024
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#define META_ID_IMEI 1025
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#define META_ID_CELL 1026
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#define META_ID_TLLI 1027
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#define META_ID_NSAPI 1028
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#define META_ID_APN 1029
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#define META_ID_RAT 1030
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#define META_ID_CALLING 1031
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#define META_ID_CALLED 1032
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enum meta_direction {
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META_DIR_UP,
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META_DIR_DOWN
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};
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static int proto_meta = -1;
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extern int proto_sscop;
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/* fields */
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static int hf_meta_schema = -1;
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static int hf_meta_hdrlen = -1;
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static int hf_meta_proto = -1;
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static int hf_meta_reserved = -1;
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static int hf_meta_item = -1;
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static int hf_meta_item_id = -1;
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static int hf_meta_item_type = -1;
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static int hf_meta_item_len = -1;
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static int hf_meta_item_data = -1;
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/* specific fields */
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static int hf_meta_item_direction = -1;
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static int hf_meta_item_ts = -1;
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static int hf_meta_item_phylinkid = -1;
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static int hf_meta_item_nsapi = -1;
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static int hf_meta_item_imsi_value = -1;
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static int hf_meta_item_imsi_digits = -1;
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static int hf_meta_item_imei_value = -1;
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static int hf_meta_item_imei_digits = -1;
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static int hf_meta_item_signaling = -1;
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static int hf_meta_item_incomplete = -1;
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static int hf_meta_item_deciphered = -1;
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static int hf_meta_item_apn = -1;
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static int hf_meta_item_rat = -1;
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static int hf_meta_item_aal5proto = -1;
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static int hf_meta_item_cell = -1;
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static int hf_meta_item_localdevid = -1;
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static int hf_meta_item_remotedevid = -1;
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static int hf_meta_item_tapgroupid = -1;
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static int hf_meta_item_tlli = -1;
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static int hf_meta_item_calling = -1;
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static int hf_meta_item_called = -1;
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/* subtrees */
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static gint ett_meta = -1;
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static gint ett_meta_item = -1;
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static gint ett_meta_cell = -1;
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static gint ett_meta_imsi = -1;
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static gint ett_meta_imei = -1;
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static expert_field ei_meta_malformed = EI_INIT;
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static expert_field ei_meta_invalid_header = EI_INIT;
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/* default handle */
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static dissector_handle_t data_handle;
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static dissector_handle_t atm_untrunc_handle;
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static dissector_handle_t sscf_nni_handle;
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static dissector_handle_t alcap_handle;
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static dissector_handle_t nbap_handle;
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static dissector_handle_t ethwithfcs_handle;
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static dissector_handle_t ethwithoutfcs_handle;
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static dissector_handle_t fphint_handle;
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static dissector_handle_t mtp2_handle;
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static dissector_table_t meta_dissector_table;
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static const value_string meta_schema_vals[] = {
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{ META_SCHEMA_PCAP, "PCAP" },
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{ META_SCHEMA_DXT, "DXT" },
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{ 0, NULL }
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};
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static const value_string meta_proto_vals[] = {
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{ META_PROTO_DXT_ETHERNET, "Ethernet without FCS" },
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{ META_PROTO_DXT_ETHERNET_CRC, "Ethernet with FCS" },
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{ META_PROTO_DXT_ATM, "ATM" },
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{ META_PROTO_DXT_ERF_AAL5, "ERF AAL5" },
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/* XXX: META_PROTO_DXT_M3UA ? */
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/* XXX: META_PROTO_DXT_NBAP ? */
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{ META_PROTO_DXT_ATM_AAL2, "ATM AAL2" },
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{ META_PROTO_DXT_FP_HINT, "FP Hint" },
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{ META_PROTO_DXT_HDLC, "HDLC" },
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{ META_PROTO_DXT_CONTAINER, "DXT CONTAINER" },
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{ META_PROTO_DXT_FP_CAPTURE, "FP CAPTURE" },
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{ META_PROTO_DXT_UTRAN_CAPSULE, "UTRAN CAPSULE" },
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{ 0, NULL }
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};
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static value_string_ext meta_proto_vals_ext = VALUE_STRING_EXT_INIT(meta_proto_vals);
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static const value_string meta_type_vals[] = {
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{ META_TYPE_NONE, "NONE" },
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{ META_TYPE_BOOLEAN, "BOOLEAN" },
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{ META_TYPE_UINT8, "UINT8" },
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{ META_TYPE_UINT16, "UINT16" },
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{ META_TYPE_UINT32, "UINT32" },
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{ META_TYPE_UINT64, "UINT64" },
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{ META_TYPE_STRING, "STRING" },
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{ 0, NULL }
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};
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/* TODO: this must be on a per-schema basis! */
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static const value_string meta_id_vals[] = {
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{ META_ID_NULL, "NULL" },
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{ META_ID_DIRECTION, "Direction" },
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{ META_ID_SIGNALING, "Signaling" },
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{ META_ID_INCOMPLETE, "Incomplete" },
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{ META_ID_DECIPHERED, "Deciphered" },
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{ META_ID_PAYLOADCUT, "Payload cutted" },
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{ META_ID_TIMESTAMP64, "Timestamp" },
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{ META_ID_AAL5PROTO, "AAL5 Protocol Type" },
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{ META_ID_PHYLINKID, "Physical Link ID" },
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{ META_ID_LOCALDEVID, "Local Device ID" },
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{ META_ID_REMOTEDEVID, "Remote Device ID" },
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{ META_ID_TAPGROUPID, "Tap Group ID" },
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{ META_ID_IMSI, "IMSI" },
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{ META_ID_IMEI, "IMEI" },
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{ META_ID_CELL, "Mobile Cell" },
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{ META_ID_TLLI, "TLLI" },
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{ META_ID_NSAPI, "NSAPI" },
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{ META_ID_APN, "APN" },
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{ META_ID_RAT, "RAT" },
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{ META_ID_CALLING, "Calling Station ID" },
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{ META_ID_CALLED, "Called Station ID" },
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{ 0, NULL }
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};
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static value_string_ext meta_id_vals_ext = VALUE_STRING_EXT_INIT(meta_id_vals);
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#define META_AAL5PROTO_MTP3 2
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#define META_AAL5PROTO_NS 3
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#define META_AAL5PROTO_ALCAP 5
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#define META_AAL5PROTO_NBAP 6
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static const value_string meta_aal5proto_vals[] = {
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{ META_AAL5PROTO_MTP3, "SSCOP MTP3" },
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{ META_AAL5PROTO_ALCAP, "SSCOP ALCAP" },
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{ META_AAL5PROTO_NBAP, "SSCOP NBAP" },
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{ META_AAL5PROTO_NS, "GPRS NS" },
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{ 0, NULL }
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};
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static const value_string meta_direction_vals[] = {
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{ 0, "Up" },
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{ 1, "Down" },
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{ 0, NULL }
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};
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static guint16 skip_item(proto_tree *meta_tree, tvbuff_t *tvb, packet_info *pinfo _U_, guint16 offs)
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{
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guint16 id;
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guint8 type;
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guint16 len, aligned_len, total_len;
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proto_tree *item_tree;
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proto_item *subti;
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id = tvb_get_letohs(tvb, offs); offs += 2;
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type = tvb_get_guint8(tvb, offs); offs++;
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len = tvb_get_guint8(tvb, offs); offs++;
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aligned_len = (len + 3) & 0xfffc;
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total_len = aligned_len + 4; /* 4: id, type, len fields */
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subti = proto_tree_add_item(meta_tree, hf_meta_item, tvb, offs - 4,
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aligned_len + 4, ENC_NA);
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item_tree = proto_item_add_subtree(subti, ett_meta_item);
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proto_tree_add_uint(item_tree, hf_meta_item_id, tvb, offs - 4, 2, id);
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proto_tree_add_uint(item_tree, hf_meta_item_type, tvb, offs - 2, 1, type);
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proto_tree_add_uint(item_tree, hf_meta_item_len,
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tvb, offs - 1, 1, len);
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if (len > 0)
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proto_tree_add_item(item_tree, hf_meta_item_data,
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tvb, offs, len, ENC_NA);
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return total_len;
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}
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/*
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* offs: current offset in tvb
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*/
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static guint16 evaluate_meta_item_pcap(proto_tree *meta_tree, tvbuff_t *tvb, packet_info *pinfo, guint16 offs)
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{
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guint16 id;
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guint8 type;
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guint16 len, aligned_len, total_len;
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proto_tree *item_tree;
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proto_item *subti;
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/* field values */
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guint8 dir;
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guint64 ts;
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id = tvb_get_letohs(tvb, offs); offs += 2;
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type = tvb_get_guint8(tvb, offs); offs++;
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len = tvb_get_guint8(tvb, offs); offs++;
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aligned_len = (len + 3) & 0xfffc;
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total_len = aligned_len + 4; /* 4: id, type, len fields */
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switch (id) {
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case META_ID_DIRECTION:
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dir = tvb_get_guint8(tvb, offs);
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pinfo->p2p_dir = dir == META_DIR_UP ? P2P_DIR_RECV : P2P_DIR_SENT;
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proto_tree_add_uint(meta_tree, hf_meta_item_direction, tvb, offs, 1, dir);
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break;
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case META_ID_TIMESTAMP64:
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ts = tvb_get_letoh64(tvb, offs);
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proto_tree_add_uint64(meta_tree, hf_meta_item_ts, tvb, offs, 8, ts);
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break;
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case META_ID_SIGNALING:
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proto_tree_add_boolean(meta_tree, hf_meta_item_signaling, tvb,
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offs, 0, 1);
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break;
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case META_ID_INCOMPLETE:
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proto_tree_add_boolean(meta_tree, hf_meta_item_incomplete, tvb,
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offs, 0, 1);
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break;
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default:
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subti = proto_tree_add_item(meta_tree, hf_meta_item, tvb, offs - 4,
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aligned_len + 4, ENC_NA);
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item_tree = proto_item_add_subtree(subti, ett_meta_item);
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proto_tree_add_uint(item_tree, hf_meta_item_id, tvb, offs - 4, 2, id);
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proto_tree_add_uint(item_tree, hf_meta_item_type, tvb, offs - 2, 1, type);
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proto_tree_add_uint(item_tree, hf_meta_item_len,
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tvb, offs - 1, 1, len);
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if (len > 0)
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proto_tree_add_item(item_tree, hf_meta_item_data,
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tvb, offs, len, ENC_NA);
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}
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return total_len;
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}
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/*
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* offs: current offset in tvb
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*/
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static guint16 evaluate_meta_item_dxt(proto_tree *meta_tree, tvbuff_t *tvb, packet_info *pinfo, guint16 offs, struct atm_phdr *atm_info)
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{
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guint16 id;
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guint8 type;
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guint16 len, aligned_len, total_len;
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proto_tree *item_tree;
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proto_item *subti;
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/* field values */
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guint8 dir, nsapi, rat, aal5proto;
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guint16 phylinkid, localdevid, remotedevid, tapgroupid;
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guint32 tlli;
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guint64 ts, cell;
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sscop_payload_info *p_sscop_info;
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proto_item *cell_item, *imsi_item, *imei_item;
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proto_tree *cell_tree, *imsi_tree, *imei_tree;
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id = tvb_get_letohs(tvb, offs); offs += 2;
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type = tvb_get_guint8(tvb, offs); offs++;
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len = tvb_get_guint8(tvb, offs); offs++;
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aligned_len = (len + 3) & 0xfffc;
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total_len = aligned_len + 4; /* 4: id, type, len fields */
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switch (id) {
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case META_ID_DIRECTION:
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dir = tvb_get_guint8(tvb, offs);
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pinfo->p2p_dir = (dir == META_DIR_UP ? P2P_DIR_RECV : P2P_DIR_SENT);
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proto_tree_add_uint(meta_tree, hf_meta_item_direction, tvb, offs, 1, dir);
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break;
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case META_ID_TIMESTAMP64:
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ts = tvb_get_letoh64(tvb, offs);
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proto_tree_add_uint64(meta_tree, hf_meta_item_ts, tvb, offs, 8, ts);
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break;
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case META_ID_PHYLINKID:
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phylinkid = tvb_get_letohs(tvb, offs);
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pinfo->link_number = phylinkid;
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proto_tree_add_uint(meta_tree, hf_meta_item_phylinkid, tvb,
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offs, 2, phylinkid);
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break;
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case META_ID_NSAPI:
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nsapi = tvb_get_guint8(tvb, offs);
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proto_tree_add_uint(meta_tree, hf_meta_item_nsapi, tvb,
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offs, 1, nsapi);
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break;
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case META_ID_IMSI:
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imsi_item = proto_tree_add_item(meta_tree, hf_meta_item_imsi_digits, tvb,
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offs, 8, ENC_BCD_DIGITS_0_9);
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imsi_tree = proto_item_add_subtree(imsi_item, ett_meta_imsi);
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proto_tree_add_item(imsi_tree, hf_meta_item_imsi_value,
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tvb, offs, 8, ENC_LITTLE_ENDIAN);
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break;
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case META_ID_IMEI:
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imei_item = proto_tree_add_item(meta_tree, hf_meta_item_imei_digits, tvb,
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offs, 8, ENC_BCD_DIGITS_0_9);
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imei_tree = proto_item_add_subtree(imei_item, ett_meta_imei);
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proto_tree_add_item(imei_tree, hf_meta_item_imei_value,
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tvb, offs, 8, ENC_LITTLE_ENDIAN);
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break;
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case META_ID_APN:
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proto_tree_add_item(meta_tree, hf_meta_item_apn, tvb,
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offs, len, ENC_ASCII|ENC_NA);
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break;
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case META_ID_RAT:
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rat = tvb_get_guint8(tvb, offs);
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proto_tree_add_uint(meta_tree, hf_meta_item_rat, tvb,
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offs, 1, rat);
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break;
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case META_ID_CELL:
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cell = tvb_get_ntoh64(tvb, offs);
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cell_item = proto_tree_add_uint64_format(meta_tree, hf_meta_item_cell,
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tvb, offs, 8, cell, "Mobile Cell");
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cell_tree = proto_item_add_subtree(cell_item, ett_meta_cell);
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de_gmm_rai(tvb, cell_tree, pinfo, offs, 8, NULL, 0);
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de_cell_id(tvb, cell_tree, pinfo, offs + 6, 2, NULL, 0);
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break;
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case META_ID_SIGNALING:
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proto_tree_add_boolean(meta_tree, hf_meta_item_signaling, tvb,
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offs, 0, 1);
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break;
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case META_ID_INCOMPLETE:
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proto_tree_add_boolean(meta_tree, hf_meta_item_incomplete, tvb,
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offs, 0, 1);
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break;
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case META_ID_DECIPHERED:
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proto_tree_add_boolean(meta_tree, hf_meta_item_deciphered, tvb,
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offs, 0, 1);
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break;
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case META_ID_AAL5PROTO:
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aal5proto = tvb_get_guint8(tvb, offs);
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p_sscop_info = (sscop_payload_info *)p_get_proto_data(wmem_file_scope(), pinfo, proto_sscop, 0);
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if (!p_sscop_info) {
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p_sscop_info = wmem_new0(wmem_file_scope(), sscop_payload_info);
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p_add_proto_data(wmem_file_scope(), pinfo, proto_sscop, 0, p_sscop_info);
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}
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switch (aal5proto) {
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case META_AAL5PROTO_MTP3:
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p_sscop_info->subdissector = sscf_nni_handle;
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/* hint for ATM dissector that this frame contains SSCOP */
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memset(atm_info, 0, sizeof(*atm_info));
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atm_info->type = TRAF_SSCOP;
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break;
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case META_AAL5PROTO_ALCAP:
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p_sscop_info->subdissector = alcap_handle;
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break;
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case META_AAL5PROTO_NBAP:
|
|
p_sscop_info->subdissector = nbap_handle;
|
|
break;
|
|
case META_AAL5PROTO_NS:
|
|
/* hint for ATM dissector that this frame contains GPRS NS */
|
|
memset(atm_info, 0, sizeof(*atm_info));
|
|
atm_info->type = TRAF_GPRS_NS;
|
|
break;
|
|
/* TODO: check for additional protos on Iu 802 LLC/SNAP ... */
|
|
default:
|
|
/* TODO: add warning */
|
|
p_remove_proto_data(wmem_file_scope(), pinfo, proto_sscop, 0);
|
|
}
|
|
proto_tree_add_uint(meta_tree, hf_meta_item_aal5proto, tvb,
|
|
offs, 1, aal5proto);
|
|
break;
|
|
case META_ID_LOCALDEVID:
|
|
localdevid = tvb_get_letohs(tvb, offs);
|
|
proto_tree_add_uint(meta_tree, hf_meta_item_localdevid, tvb,
|
|
offs, 2, localdevid);
|
|
break;
|
|
case META_ID_REMOTEDEVID:
|
|
remotedevid = tvb_get_letohs(tvb, offs);
|
|
proto_tree_add_uint(meta_tree, hf_meta_item_remotedevid, tvb,
|
|
offs, 2, remotedevid);
|
|
break;
|
|
case META_ID_TAPGROUPID:
|
|
tapgroupid = tvb_get_letohs(tvb, offs);
|
|
proto_tree_add_uint(meta_tree, hf_meta_item_tapgroupid, tvb,
|
|
offs, 2, tapgroupid);
|
|
break;
|
|
case META_ID_TLLI:
|
|
tlli = tvb_get_letohs(tvb, offs);
|
|
proto_tree_add_uint(meta_tree, hf_meta_item_tlli, tvb,
|
|
offs, 4, tlli);
|
|
break;
|
|
case META_ID_CALLING:
|
|
proto_tree_add_item(meta_tree, hf_meta_item_calling, tvb,
|
|
offs, len, ENC_ASCII|ENC_NA);
|
|
break;
|
|
case META_ID_CALLED:
|
|
proto_tree_add_item(meta_tree, hf_meta_item_called, tvb,
|
|
offs, len, ENC_ASCII|ENC_NA);
|
|
break;
|
|
default:
|
|
subti = proto_tree_add_item(meta_tree, hf_meta_item, tvb, offs - 4,
|
|
aligned_len + 4, ENC_NA);
|
|
item_tree = proto_item_add_subtree(subti, ett_meta_item);
|
|
proto_tree_add_uint(item_tree, hf_meta_item_id, tvb, offs - 4, 2, id);
|
|
proto_tree_add_uint(item_tree, hf_meta_item_type, tvb, offs - 2, 1, type);
|
|
proto_tree_add_uint(item_tree, hf_meta_item_len,
|
|
tvb, offs - 1, 1, len);
|
|
if (len > 0)
|
|
proto_tree_add_item(item_tree, hf_meta_item_data,
|
|
tvb, offs, len, ENC_NA);
|
|
}
|
|
return total_len;
|
|
}
|
|
|
|
/*
|
|
* offs: current offset within tvb
|
|
* header_length: length of meta header
|
|
*/
|
|
static gint32 evaluate_meta_items(guint16 schema, tvbuff_t *tvb, packet_info *pinfo,
|
|
proto_tree *meta_tree, guint16 offs, gint32 header_length,
|
|
struct atm_phdr *atm_info)
|
|
{
|
|
gint16 item_len;
|
|
gint32 total_len = 0;
|
|
|
|
while (total_len < header_length) {
|
|
switch (schema) {
|
|
case META_SCHEMA_DXT:
|
|
item_len = evaluate_meta_item_dxt(meta_tree, tvb, pinfo, offs + total_len, atm_info);
|
|
break;
|
|
case META_SCHEMA_PCAP:
|
|
item_len = evaluate_meta_item_pcap(meta_tree, tvb, pinfo, offs + total_len);
|
|
break;
|
|
default:
|
|
item_len = skip_item(meta_tree, tvb, pinfo, offs + total_len);
|
|
}
|
|
if (item_len < 4) { /* 4 is the minimum length of an item: id + type + length field */
|
|
expert_add_info_format(pinfo, meta_tree, &ei_meta_malformed,
|
|
"Malformed Packet %s (wrong item encoding)", pinfo->current_proto);
|
|
return -1;
|
|
}
|
|
total_len += item_len;
|
|
}
|
|
return total_len;
|
|
}
|
|
|
|
static int
|
|
dissect_meta(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
|
|
{
|
|
#define META_HEADER_SIZE 8
|
|
guint16 schema, proto, hdrlen, reserved;
|
|
gint32 item_len;
|
|
guint32 aal2_ext, atm_hdr;
|
|
proto_tree *meta_tree = NULL;
|
|
proto_item *ti = NULL;
|
|
tvbuff_t *next_tvb = NULL;
|
|
dissector_handle_t next_dissector = data_handle;
|
|
void *next_dissector_data = NULL;
|
|
struct atm_phdr atm_info;
|
|
|
|
col_set_str(pinfo->cinfo, COL_PROTOCOL, "META");
|
|
|
|
schema = tvb_get_letohs(tvb, 0);
|
|
hdrlen = tvb_get_letohs(tvb, 2);
|
|
proto = tvb_get_letohs(tvb, 4);
|
|
reserved = tvb_get_letohs(tvb, 6);
|
|
|
|
if (tree) {
|
|
ti = proto_tree_add_item(tree, proto_meta, tvb, 0, hdrlen + 4, ENC_NA);
|
|
meta_tree = proto_item_add_subtree(ti, ett_meta);
|
|
proto_tree_add_uint(meta_tree, hf_meta_schema, tvb, 0, 2, schema);
|
|
proto_tree_add_uint(meta_tree, hf_meta_hdrlen, tvb, 2, 2, hdrlen);
|
|
proto_tree_add_uint(meta_tree, hf_meta_proto, tvb, 4, 2, proto);
|
|
proto_tree_add_uint(meta_tree, hf_meta_reserved, tvb, 6, 2, reserved);
|
|
}
|
|
item_len = evaluate_meta_items(schema, tvb, pinfo, meta_tree, META_HEADER_SIZE, hdrlen, &atm_info);
|
|
|
|
if (item_len < 0) {
|
|
/* evaluate_meta_items signalled an error */
|
|
return META_HEADER_SIZE; /* stop parsing */
|
|
}
|
|
|
|
if (hdrlen != item_len) {
|
|
expert_add_info(pinfo, ti, &ei_meta_invalid_header);
|
|
return META_HEADER_SIZE;
|
|
}
|
|
|
|
/* find next subdissector based on the chosen schema */
|
|
switch (schema) {
|
|
case META_SCHEMA_PCAP:
|
|
/* TODO */
|
|
break;
|
|
case META_SCHEMA_DXT:
|
|
switch (proto) {
|
|
case META_PROTO_DXT_ETHERNET:
|
|
next_dissector = ethwithoutfcs_handle;
|
|
break;
|
|
case META_PROTO_DXT_ETHERNET_CRC:
|
|
next_dissector = ethwithfcs_handle;
|
|
break;
|
|
case META_PROTO_DXT_FP_HINT:
|
|
next_dissector = fphint_handle;
|
|
break;
|
|
case META_PROTO_DXT_ATM:
|
|
memset(&atm_info, 0, sizeof atm_info);
|
|
atm_info.aal = AAL_OAMCELL;
|
|
atm_info.type = TRAF_UNKNOWN;
|
|
next_dissector = atm_untrunc_handle;
|
|
next_dissector_data = &atm_info;
|
|
break;
|
|
case META_PROTO_DXT_ATM_AAL2:
|
|
aal2_ext = tvb_get_ntohl(tvb, item_len + META_HEADER_SIZE); item_len += 4;
|
|
atm_hdr = tvb_get_ntohl(tvb, item_len + META_HEADER_SIZE); item_len += 4;
|
|
memset(&atm_info, 0, sizeof(atm_info));
|
|
atm_info.aal = AAL_2;
|
|
/* atm_info.flags = pinfo->p2p_dir; */
|
|
atm_info.vpi = ((atm_hdr & 0x0ff00000) >> 20);
|
|
atm_info.vci = ((atm_hdr & 0x000ffff0) >> 4);
|
|
atm_info.aal2_cid = aal2_ext & 0x000000ff;
|
|
atm_info.type = TRAF_UMTS_FP;
|
|
next_dissector = atm_untrunc_handle;
|
|
next_dissector_data = &atm_info;
|
|
break;
|
|
case META_PROTO_DXT_ERF_AAL5:
|
|
atm_hdr = tvb_get_ntohl(tvb, item_len + META_HEADER_SIZE); item_len += 4;
|
|
atm_info.vpi = ((atm_hdr & 0x0ff00000) >> 20);
|
|
atm_info.vci = ((atm_hdr & 0x000ffff0) >> 4);
|
|
atm_info.aal = AAL_5;
|
|
next_dissector = atm_untrunc_handle;
|
|
next_dissector_data = &atm_info;
|
|
break;
|
|
case META_PROTO_DXT_HDLC:
|
|
next_dissector = mtp2_handle;
|
|
next_tvb = tvb_new_subset_length_caplen(tvb, item_len + META_HEADER_SIZE,
|
|
tvb_reported_length(tvb)-item_len-META_HEADER_SIZE-2, -1);
|
|
break;
|
|
default:
|
|
next_dissector =
|
|
dissector_get_uint_handle(meta_dissector_table, proto);
|
|
}
|
|
}
|
|
if (!next_tvb)
|
|
next_tvb = tvb_new_subset_remaining(tvb, item_len + META_HEADER_SIZE);
|
|
|
|
call_dissector_with_data(next_dissector, next_tvb, pinfo, tree,
|
|
next_dissector_data);
|
|
return tvb_captured_length(tvb);
|
|
}
|
|
|
|
void
|
|
proto_register_meta(void)
|
|
{
|
|
static hf_register_info hf[] = {
|
|
/* metadata header */
|
|
{ &hf_meta_schema,
|
|
{ "Schema", "meta.schema",
|
|
FT_UINT16, BASE_DEC, VALS(meta_schema_vals), 0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_meta_hdrlen,
|
|
{ "Header Length", "meta.hdrlen",
|
|
FT_UINT16, BASE_DEC, NULL, 0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_meta_proto,
|
|
{ "Protocol", "meta.proto",
|
|
FT_UINT16, BASE_DEC | BASE_EXT_STRING, &meta_proto_vals_ext, 0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_meta_reserved,
|
|
{ "Reserved", "meta.reserved",
|
|
FT_UINT16, BASE_HEX, NULL, 0,
|
|
NULL, HFILL }
|
|
},
|
|
|
|
/* general meta item */
|
|
{ &hf_meta_item,
|
|
{ "Unknown Item", "meta.item",
|
|
FT_NONE, BASE_NONE, NULL, 0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_meta_item_id,
|
|
{ "Item ID", "meta.item.id",
|
|
FT_UINT16, BASE_HEX | BASE_EXT_STRING, &meta_id_vals_ext, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_meta_item_type,
|
|
{ "Item Type", "meta.item.type",
|
|
FT_UINT8, BASE_HEX, VALS(meta_type_vals), 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_meta_item_len,
|
|
{ "Item Length", "meta.item.len",
|
|
FT_UINT8, BASE_DEC, NULL, 0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_meta_item_data,
|
|
{ "Item Data", "meta.item.data",
|
|
FT_BYTES, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
|
|
/* specific meta items */
|
|
{ &hf_meta_item_direction,
|
|
{ "Direction", "meta.direction",
|
|
FT_UINT8, BASE_DEC, VALS(meta_direction_vals), 0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_meta_item_ts,
|
|
{ "Timestamp", "meta.timestamp",
|
|
FT_UINT64, BASE_DEC, NULL, 0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_meta_item_phylinkid,
|
|
{ "Physical Link ID", "meta.phylinkid",
|
|
FT_UINT16, BASE_DEC, NULL, 0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_meta_item_nsapi,
|
|
{ "NSAPI", "meta.nsapi",
|
|
FT_UINT8, BASE_DEC, NULL, 0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_meta_item_imsi_digits,
|
|
{ "IMSI digits", "meta.imsi_digits",
|
|
FT_STRING, BASE_NONE, NULL, 0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_meta_item_imsi_value,
|
|
{ "IMSI value", "meta.imsi_value",
|
|
FT_UINT64, BASE_HEX, NULL, 0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_meta_item_imei_digits,
|
|
{ "IMEI digits", "meta.imei_digits",
|
|
FT_STRING, BASE_NONE, NULL, 0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_meta_item_imei_value,
|
|
{ "IMEI value", "meta.imei_value",
|
|
FT_UINT64, BASE_HEX, NULL, 0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_meta_item_signaling,
|
|
{ "Signaling", "meta.signaling",
|
|
FT_BOOLEAN, BASE_NONE, NULL, 0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_meta_item_incomplete,
|
|
{ "Incomplete", "meta.incomplete",
|
|
FT_BOOLEAN, BASE_NONE, NULL, 0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_meta_item_deciphered,
|
|
{ "Deciphered", "meta.deciphered",
|
|
FT_BOOLEAN, BASE_NONE, NULL, 0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_meta_item_apn,
|
|
{ "APN", "meta.apn",
|
|
FT_STRINGZ, BASE_NONE, NULL, 0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_meta_item_rat,
|
|
{ "RAT", "meta.rat",
|
|
FT_UINT8, BASE_DEC, NULL, 0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_meta_item_aal5proto,
|
|
{ "AAL5 Protocol Type", "meta.aal5proto",
|
|
FT_UINT8, BASE_DEC, VALS(meta_aal5proto_vals), 0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_meta_item_cell,
|
|
{ "Mobile Cell", "meta.cell",
|
|
FT_UINT64, BASE_HEX, NULL, 0,
|
|
NULL, HFILL }
|
|
},
|
|
|
|
{ &hf_meta_item_localdevid,
|
|
{ "Local Device ID", "meta.localdevid",
|
|
FT_UINT16, BASE_DEC, NULL, 0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_meta_item_remotedevid,
|
|
{ "Remote Device ID", "meta.remotedevid",
|
|
FT_UINT16, BASE_DEC, NULL, 0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_meta_item_tapgroupid,
|
|
{ "Tap Group ID", "meta.tapgroupid",
|
|
FT_UINT16, BASE_DEC, NULL, 0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_meta_item_tlli,
|
|
{ "TLLI", "meta.tlli",
|
|
FT_UINT32, BASE_DEC, NULL, 0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_meta_item_calling,
|
|
{ "Calling Station ID", "meta.calling",
|
|
FT_STRINGZ, BASE_NONE, NULL, 0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_meta_item_called,
|
|
{ "Called Station ID", "meta.called",
|
|
FT_STRINGZ, BASE_NONE, NULL, 0,
|
|
NULL, HFILL }
|
|
},
|
|
};
|
|
|
|
static gint *ett[] = {
|
|
&ett_meta,
|
|
&ett_meta_item,
|
|
&ett_meta_cell,
|
|
&ett_meta_imsi,
|
|
&ett_meta_imei
|
|
};
|
|
|
|
static ei_register_info ei[] = {
|
|
{ &ei_meta_malformed, { "meta.malformed", PI_MALFORMED, PI_ERROR, "Malformed data", EXPFILL }},
|
|
{ &ei_meta_invalid_header, { "meta.invalid_header_length", PI_MALFORMED, PI_ERROR, "Invalid Header Length", EXPFILL }},
|
|
};
|
|
|
|
expert_module_t* expert_meta;
|
|
|
|
proto_meta = proto_register_protocol("Metadata", "META", "meta");
|
|
register_dissector("meta", dissect_meta, proto_meta);
|
|
|
|
proto_register_field_array(proto_meta, hf, array_length(hf));
|
|
proto_register_subtree_array(ett, array_length(ett));
|
|
expert_meta = expert_register_protocol(proto_meta);
|
|
expert_register_field_array(expert_meta, ei, array_length(ei));
|
|
|
|
meta_dissector_table = register_dissector_table("meta.proto",
|
|
"META protocol", proto_meta, FT_UINT16, BASE_DEC);
|
|
}
|
|
|
|
void
|
|
proto_reg_handoff_meta(void)
|
|
{
|
|
#if 0 /* enable once WTAP_ENCAP_META exists */
|
|
dissector_handle_t meta_handle;
|
|
|
|
meta_handle = find_dissector("meta");
|
|
dissector_add_uint("wtap_encap", WTAP_ENCAP_META, meta_handle);
|
|
#endif
|
|
data_handle = find_dissector("data");
|
|
alcap_handle = find_dissector_add_dependency("alcap", proto_meta);
|
|
atm_untrunc_handle = find_dissector_add_dependency("atm_untruncated", proto_meta);
|
|
nbap_handle = find_dissector_add_dependency("nbap", proto_meta);
|
|
sscf_nni_handle = find_dissector_add_dependency("sscf-nni", proto_meta);
|
|
ethwithfcs_handle = find_dissector_add_dependency("eth_withfcs", proto_meta);
|
|
ethwithoutfcs_handle = find_dissector_add_dependency("eth_withoutfcs", proto_meta);
|
|
fphint_handle = find_dissector_add_dependency("fp_hint", proto_meta);
|
|
mtp2_handle = find_dissector_add_dependency("mtp2", proto_meta);
|
|
}
|
|
|
|
/*
|
|
* Editor modelines - https://www.wireshark.org/tools/modelines.html
|
|
*
|
|
* Local variables:
|
|
* c-basic-offset: 4
|
|
* tab-width: 8
|
|
* indent-tabs-mode: nil
|
|
* End:
|
|
*
|
|
* vi: set shiftwidth=4 tabstop=8 expandtab:
|
|
* :indentSize=4:tabSize=8:noTabs=true:
|
|
*/
|