2009-10-09 06:37:48 +00:00
|
|
|
/* Routines for 'Metadata' disassembly
|
|
|
|
*
|
|
|
|
* $Id$
|
|
|
|
*
|
|
|
|
* Wireshark - Network traffic analyzer
|
|
|
|
* By Gerald Combs <gerald@wireshark.org>
|
|
|
|
* Copyright 1998 Gerald Combs
|
|
|
|
*
|
|
|
|
* This program is free software; you can redistribute it and/or
|
|
|
|
* modify it under the terms of the GNU General Public License
|
|
|
|
* as published by the Free Software Foundation; either version 2
|
|
|
|
* of the License, or (at your option) any later version.
|
|
|
|
*
|
|
|
|
* This program is distributed in the hope that it will be useful,
|
|
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
|
|
* GNU General Public License for more details.
|
|
|
|
*
|
|
|
|
* You should have received a copy of the GNU General Public License
|
|
|
|
* along with this program; if not, write to the Free Software
|
|
|
|
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
|
|
|
*/
|
|
|
|
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
|
|
#include "config.h"
|
|
|
|
#endif
|
|
|
|
|
|
|
|
#include <string.h>
|
2009-11-05 21:54:06 +00:00
|
|
|
#include <stdio.h>
|
2009-10-09 06:37:48 +00:00
|
|
|
|
|
|
|
#include <glib.h>
|
|
|
|
#include <epan/packet.h>
|
|
|
|
#include <epan/expert.h>
|
|
|
|
|
|
|
|
#include "packet-meta.h"
|
|
|
|
#include "packet-sscop.h"
|
|
|
|
#include "wiretap/erf.h"
|
|
|
|
|
|
|
|
int proto_meta = -1;
|
|
|
|
extern int proto_sscop;
|
|
|
|
extern int proto_malformed;
|
|
|
|
|
|
|
|
/* fields */
|
|
|
|
static int hf_meta_schema = -1;
|
|
|
|
static int hf_meta_hdrlen = -1;
|
|
|
|
static int hf_meta_proto = -1;
|
|
|
|
static int hf_meta_reserved = -1;
|
|
|
|
static int hf_meta_item = -1;
|
|
|
|
static int hf_meta_item_id = -1;
|
|
|
|
static int hf_meta_item_type = -1;
|
|
|
|
static int hf_meta_item_len = -1;
|
|
|
|
static int hf_meta_item_data = -1;
|
|
|
|
/* specific fields */
|
|
|
|
static int hf_meta_item_direction = -1;
|
|
|
|
static int hf_meta_item_ts = -1;
|
|
|
|
static int hf_meta_item_phylinkid = -1;
|
|
|
|
static int hf_meta_item_nsapi = -1;
|
|
|
|
static int hf_meta_item_imsi = -1;
|
|
|
|
static int hf_meta_item_imei = -1;
|
|
|
|
static int hf_meta_item_signaling = -1;
|
|
|
|
static int hf_meta_item_incomplete = -1;
|
|
|
|
static int hf_meta_item_apn = -1;
|
|
|
|
static int hf_meta_item_rat = -1;
|
|
|
|
static int hf_meta_item_aal5proto = -1;
|
|
|
|
static int hf_meta_item_cell = -1;
|
|
|
|
|
|
|
|
/* subtrees */
|
|
|
|
static gint ett_meta = -1;
|
|
|
|
static gint ett_meta_item = -1;
|
|
|
|
|
|
|
|
/* default handle */
|
|
|
|
static dissector_handle_t data_handle;
|
|
|
|
static dissector_handle_t atm_untrunc_handle;
|
|
|
|
static dissector_handle_t sscf_nni_handle;
|
|
|
|
static dissector_handle_t alcap_handle;
|
|
|
|
static dissector_handle_t nbap_handle;
|
|
|
|
static dissector_handle_t ethwithfcs_handle;
|
|
|
|
static dissector_handle_t ethwithoutfcs_handle;
|
|
|
|
static dissector_handle_t fphint_handle;
|
|
|
|
static dissector_handle_t erf_handle;
|
|
|
|
|
|
|
|
static const value_string meta_schema_vals[] = {
|
|
|
|
{ META_SCHEMA_PCAP, "PCAP" },
|
|
|
|
{ META_SCHEMA_DXT, "DXT" },
|
|
|
|
{ 0, NULL }
|
|
|
|
};
|
|
|
|
|
|
|
|
static const value_string meta_proto_vals[] = {
|
|
|
|
{ META_PROTO_DXT_ETHERNET, "Ethernet without FCS" },
|
|
|
|
{ META_PROTO_DXT_ETHERNET_CRC, "Ethernet with FCS" },
|
|
|
|
{ META_PROTO_DXT_FP_HINT, "FP Hint" },
|
|
|
|
{ META_PROTO_DXT_ERF_AAL5, "ERF AAL5" },
|
|
|
|
{ META_PROTO_DXT_ERF_AAL2, "ERF AAL2" },
|
|
|
|
{ META_PROTO_DXT_ATM, "ATM" },
|
|
|
|
{ 0, NULL }
|
|
|
|
};
|
|
|
|
|
|
|
|
static const value_string meta_type_vals[] = {
|
|
|
|
{ META_TYPE_NONE, "NONE" },
|
|
|
|
{ META_TYPE_BOOLEAN, "BOOLEAN" },
|
|
|
|
{ META_TYPE_UINT8, "UINT8" },
|
|
|
|
{ META_TYPE_UINT16, "UINT16" },
|
|
|
|
{ META_TYPE_UINT32, "UINT32" },
|
|
|
|
{ META_TYPE_UINT64, "UINT64" },
|
|
|
|
{ META_TYPE_STRING, "STRING" },
|
|
|
|
{ 0, NULL }
|
|
|
|
};
|
|
|
|
|
|
|
|
/* TODO: this must be on a per-schema basis! */
|
|
|
|
static const value_string meta_id_vals[] = {
|
|
|
|
{ META_ID_NULL, "NULL" },
|
|
|
|
{ META_ID_DIRECTION, "Direction" },
|
|
|
|
{ META_ID_SIGNALING, "Signaling" },
|
|
|
|
{ META_ID_INCOMPLETE, "Incomplete" },
|
|
|
|
{ META_ID_DECIPHERED, "Deciphered" },
|
|
|
|
{ META_ID_PAYLOADCUT, "Payload cutted" },
|
|
|
|
{ META_ID_TIMESTAMP64, "Timestamp" },
|
|
|
|
{ META_ID_AAL5PROTO, "AAL5 Protocol Type" },
|
|
|
|
{ META_ID_PHYLINKID, "Physical Link ID" },
|
|
|
|
{ META_ID_LOCALDEVID, "Local Device ID" },
|
|
|
|
{ META_ID_REMOTEDEVID, "Remote Device ID" },
|
|
|
|
{ META_ID_TAPGROUPID, "Tap Group ID" },
|
|
|
|
{ META_ID_IMSI, "IMSI" },
|
|
|
|
{ META_ID_IMEI, "IMEI" },
|
|
|
|
{ META_ID_CELL, "Cell" },
|
|
|
|
{ META_ID_TLLI, "TLLI" },
|
|
|
|
{ META_ID_NSAPI, "NSAPI" },
|
|
|
|
{ META_ID_APN, "APN" },
|
|
|
|
{ META_ID_RAT, "RAT" },
|
|
|
|
{ 0, NULL }
|
|
|
|
};
|
|
|
|
|
|
|
|
#define META_AAL5PROTO_MTP3 2
|
|
|
|
#define META_AAL5PROTO_ALCAP 5
|
|
|
|
#define META_AAL5PROTO_NBAP 6
|
|
|
|
static const value_string meta_aal5proto_vals[] = {
|
|
|
|
{ META_AAL5PROTO_MTP3, "SSCOP MTP3" },
|
|
|
|
{ META_AAL5PROTO_ALCAP, "SSCOP ALCAP" },
|
|
|
|
{ META_AAL5PROTO_NBAP, "SSCOP NBAP" },
|
|
|
|
{ 0, NULL }
|
|
|
|
};
|
|
|
|
|
|
|
|
static const value_string meta_direction_vals[] = {
|
|
|
|
{ 0, "Up" },
|
|
|
|
{ 1, "Down" },
|
|
|
|
{ 0, NULL }
|
|
|
|
};
|
|
|
|
|
|
|
|
static guint16 skip_item(proto_tree *meta_tree, tvbuff_t *tvb, packet_info *pinfo _U_, guint16 offs)
|
|
|
|
{
|
|
|
|
guint16 id;
|
|
|
|
guint8 type, len, aligned_len, total_len;
|
|
|
|
proto_tree *item_tree;
|
|
|
|
proto_item *subti;
|
|
|
|
|
|
|
|
id = tvb_get_letohs(tvb, offs); offs += 2;
|
|
|
|
type = tvb_get_guint8(tvb, offs); offs++;
|
|
|
|
len = tvb_get_guint8(tvb, offs); offs++;
|
|
|
|
aligned_len = (len + 3) & 0xfffc;
|
|
|
|
total_len = aligned_len + 4; /* 4: id, type, len fields */
|
|
|
|
|
|
|
|
subti = proto_tree_add_item(meta_tree, hf_meta_item, tvb, offs - 4,
|
|
|
|
aligned_len + 4, FALSE);
|
|
|
|
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_bytes(item_tree, hf_meta_item_data,
|
|
|
|
tvb, offs, len, tvb_get_ptr(tvb, offs, len));
|
|
|
|
|
|
|
|
return total_len;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* offs: current offset in tvb
|
|
|
|
*/
|
|
|
|
static guint16 evaluate_meta_item_pcap(proto_tree *meta_tree, tvbuff_t *tvb, packet_info *pinfo, guint16 offs)
|
|
|
|
{
|
|
|
|
guint16 id;
|
|
|
|
guint8 type, len, aligned_len, total_len;
|
|
|
|
proto_tree *item_tree;
|
|
|
|
proto_item *subti;
|
|
|
|
/* field values */
|
|
|
|
guint8 dir;
|
|
|
|
guint64 ts;
|
|
|
|
|
|
|
|
id = tvb_get_letohs(tvb, offs); offs += 2;
|
|
|
|
type = tvb_get_guint8(tvb, offs); offs++;
|
|
|
|
len = tvb_get_guint8(tvb, offs); offs++;
|
|
|
|
aligned_len = (len + 3) & 0xfffc;
|
|
|
|
total_len = aligned_len + 4; /* 4: id, type, len fields */
|
|
|
|
|
|
|
|
switch (id) {
|
|
|
|
case META_ID_DIRECTION:
|
|
|
|
dir = tvb_get_guint8(tvb, offs);
|
|
|
|
pinfo->p2p_dir = dir == META_DIR_UP ? P2P_DIR_RECV : P2P_DIR_SENT;
|
|
|
|
proto_tree_add_uint(meta_tree, hf_meta_item_direction, tvb, offs, 1, dir);
|
|
|
|
break;
|
|
|
|
case META_ID_TIMESTAMP64:
|
|
|
|
ts = tvb_get_letoh64(tvb, offs);
|
|
|
|
proto_tree_add_uint64(meta_tree, hf_meta_item_ts, tvb, offs, 8, ts);
|
|
|
|
break;
|
|
|
|
case META_ID_SIGNALING:
|
|
|
|
proto_tree_add_boolean(meta_tree, hf_meta_item_signaling, tvb,
|
|
|
|
offs, 0, 1);
|
|
|
|
break;
|
|
|
|
case META_ID_INCOMPLETE:
|
|
|
|
proto_tree_add_boolean(meta_tree, hf_meta_item_incomplete, tvb,
|
|
|
|
offs, 0, 1);
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
subti = proto_tree_add_item(meta_tree, hf_meta_item, tvb, offs - 4,
|
|
|
|
aligned_len + 4, FALSE);
|
|
|
|
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_bytes(item_tree, hf_meta_item_data,
|
|
|
|
tvb, offs, len, tvb_get_ptr(tvb, offs, len));
|
|
|
|
}
|
|
|
|
return total_len;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* offs: current offset in tvb
|
|
|
|
*/
|
|
|
|
static guint16 evaluate_meta_item_dxt(proto_tree *meta_tree, tvbuff_t *tvb, packet_info *pinfo, guint16 offs)
|
|
|
|
{
|
|
|
|
guint16 id;
|
|
|
|
guint8 type, len, aligned_len, total_len;
|
|
|
|
proto_tree *item_tree;
|
|
|
|
proto_item *subti;
|
|
|
|
/* field values */
|
|
|
|
guint8 dir, nsapi, rat, aal5proto, *apn;
|
|
|
|
guint16 phylinkid;
|
|
|
|
guint64 ts, imsi, imei, cell;
|
|
|
|
sscop_payload_info *p_sscop_info;
|
|
|
|
|
|
|
|
id = tvb_get_letohs(tvb, offs); offs += 2;
|
|
|
|
type = tvb_get_guint8(tvb, offs); offs++;
|
|
|
|
len = tvb_get_guint8(tvb, offs); offs++;
|
|
|
|
aligned_len = (len + 3) & 0xfffc;
|
|
|
|
total_len = aligned_len + 4; /* 4: id, type, len fields */
|
|
|
|
|
|
|
|
switch (id) {
|
|
|
|
case META_ID_DIRECTION:
|
|
|
|
dir = tvb_get_guint8(tvb, offs);
|
|
|
|
pinfo->p2p_dir = dir == META_DIR_UP ? P2P_DIR_RECV : P2P_DIR_SENT;
|
|
|
|
proto_tree_add_uint(meta_tree, hf_meta_item_direction, tvb, offs, 1, dir);
|
|
|
|
break;
|
|
|
|
case META_ID_TIMESTAMP64:
|
|
|
|
ts = tvb_get_letoh64(tvb, offs);
|
|
|
|
proto_tree_add_uint64(meta_tree, hf_meta_item_ts, tvb, offs, 8, ts);
|
|
|
|
break;
|
|
|
|
case META_ID_PHYLINKID:
|
|
|
|
phylinkid = tvb_get_letohs(tvb, offs);
|
|
|
|
pinfo->link_number = phylinkid;
|
|
|
|
proto_tree_add_uint(meta_tree, hf_meta_item_phylinkid, tvb,
|
|
|
|
offs, 2, phylinkid);
|
|
|
|
break;
|
|
|
|
case META_ID_NSAPI:
|
|
|
|
nsapi = tvb_get_guint8(tvb, offs);
|
|
|
|
proto_tree_add_uint(meta_tree, hf_meta_item_nsapi, tvb,
|
|
|
|
offs, 1, nsapi);
|
|
|
|
break;
|
|
|
|
case META_ID_IMSI:
|
|
|
|
imsi = tvb_get_letoh64(tvb, offs);
|
|
|
|
proto_tree_add_uint64(meta_tree, hf_meta_item_imsi, tvb,
|
|
|
|
offs, 8, imsi);
|
|
|
|
break;
|
|
|
|
case META_ID_IMEI:
|
|
|
|
imei = tvb_get_letoh64(tvb, offs);
|
|
|
|
proto_tree_add_uint64(meta_tree, hf_meta_item_imei, tvb,
|
|
|
|
offs, 8, imei);
|
|
|
|
break;
|
|
|
|
case META_ID_APN:
|
|
|
|
apn = tvb_get_string(tvb, offs, len);
|
|
|
|
proto_tree_add_string(meta_tree, hf_meta_item_apn, tvb,
|
|
|
|
offs, len, apn);
|
|
|
|
break;
|
|
|
|
case META_ID_RAT:
|
|
|
|
rat = tvb_get_guint8(tvb, offs);
|
|
|
|
proto_tree_add_uint(meta_tree, hf_meta_item_rat, tvb,
|
|
|
|
offs, 1, rat);
|
|
|
|
break;
|
|
|
|
case META_ID_CELL:
|
|
|
|
cell = tvb_get_ntoh64(tvb, offs);
|
|
|
|
proto_tree_add_uint64(meta_tree, hf_meta_item_cell, tvb,
|
|
|
|
offs, 8, cell);
|
|
|
|
break;
|
|
|
|
case META_ID_SIGNALING:
|
|
|
|
proto_tree_add_boolean(meta_tree, hf_meta_item_signaling, tvb,
|
|
|
|
offs, 0, 1);
|
|
|
|
break;
|
|
|
|
case META_ID_INCOMPLETE:
|
|
|
|
proto_tree_add_boolean(meta_tree, hf_meta_item_incomplete, tvb,
|
|
|
|
offs, 0, 1);
|
|
|
|
break;
|
|
|
|
case META_ID_AAL5PROTO:
|
|
|
|
aal5proto = tvb_get_guint8(tvb, offs);
|
|
|
|
p_sscop_info = p_get_proto_data(pinfo->fd, proto_sscop);
|
|
|
|
if (!p_sscop_info) {
|
|
|
|
p_sscop_info = se_alloc0(sizeof(sscop_payload_info));
|
|
|
|
p_add_proto_data(pinfo->fd, proto_sscop, p_sscop_info);
|
|
|
|
}
|
|
|
|
switch (aal5proto) {
|
|
|
|
case META_AAL5PROTO_MTP3:
|
|
|
|
p_sscop_info->subdissector = sscf_nni_handle;
|
|
|
|
break;
|
|
|
|
case META_AAL5PROTO_ALCAP:
|
|
|
|
p_sscop_info->subdissector = alcap_handle;
|
|
|
|
break;
|
|
|
|
case META_AAL5PROTO_NBAP:
|
|
|
|
p_sscop_info->subdissector = nbap_handle;
|
|
|
|
break;
|
|
|
|
/* TODO: check for additional protos on Iu 802 LLC/SNAP ... */
|
|
|
|
default:
|
|
|
|
/* TODO: add warning */
|
|
|
|
p_remove_proto_data(pinfo->fd, proto_sscop);
|
|
|
|
}
|
|
|
|
proto_tree_add_uint(meta_tree, hf_meta_item_aal5proto, tvb,
|
|
|
|
offs, 1, aal5proto);
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
subti = proto_tree_add_item(meta_tree, hf_meta_item, tvb, offs - 4,
|
|
|
|
aligned_len + 4, FALSE);
|
|
|
|
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_bytes(item_tree, hf_meta_item_data,
|
|
|
|
tvb, offs, len, tvb_get_ptr(tvb, offs, len));
|
|
|
|
}
|
|
|
|
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)
|
|
|
|
{
|
|
|
|
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);
|
|
|
|
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 */
|
|
|
|
proto_item *malformed;
|
|
|
|
malformed = proto_tree_add_protocol_format(meta_tree,
|
|
|
|
proto_malformed, tvb, offs, -1, "[Malformed Packet: %s]", pinfo->current_proto);
|
|
|
|
expert_add_info_format(pinfo, malformed, PI_MALFORMED, PI_ERROR,
|
|
|
|
"Malformed Packet (wrong item encoding)");
|
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
total_len += item_len;
|
|
|
|
}
|
|
|
|
return total_len;
|
|
|
|
}
|
|
|
|
|
|
|
|
static dissector_handle_t *dxt_get_dissector(guint16 proto, packet_info *pinfo)
|
|
|
|
{
|
|
|
|
dissector_handle_t *next_dissector = &data_handle;
|
|
|
|
switch (proto) {
|
|
|
|
case META_PROTO_DXT_ETHERNET:
|
|
|
|
next_dissector = ðwithoutfcs_handle;
|
|
|
|
break;
|
|
|
|
case META_PROTO_DXT_ETHERNET_CRC:
|
|
|
|
next_dissector = ðwithfcs_handle;
|
|
|
|
break;
|
|
|
|
case META_PROTO_DXT_FP_HINT:
|
|
|
|
next_dissector = &fphint_handle;
|
|
|
|
break;
|
|
|
|
case META_PROTO_DXT_ATM:
|
|
|
|
next_dissector = &atm_untrunc_handle;
|
|
|
|
pinfo->pseudo_header->atm.aal = AAL_OAMCELL;
|
|
|
|
pinfo->pseudo_header->atm.type = TRAF_UNKNOWN;
|
|
|
|
break;
|
|
|
|
case META_PROTO_DXT_ERF_AAL2:
|
|
|
|
/* fake erf pseudo header */
|
|
|
|
memset(&pinfo->pseudo_header->erf, 0, sizeof(pinfo->pseudo_header->erf));
|
|
|
|
pinfo->pseudo_header->erf.phdr.type = ERF_TYPE_AAL2;
|
|
|
|
/* store p2p direction in ERF flags */
|
|
|
|
pinfo->pseudo_header->erf.phdr.flags |= pinfo->p2p_dir;
|
|
|
|
next_dissector = &erf_handle;
|
|
|
|
break;
|
|
|
|
case META_PROTO_DXT_ERF_AAL5:
|
|
|
|
/* fake erf pseudo header */
|
|
|
|
memset(&pinfo->pseudo_header->erf, 0, sizeof(pinfo->pseudo_header->erf));
|
|
|
|
pinfo->pseudo_header->erf.phdr.type = ERF_TYPE_AAL5;
|
|
|
|
/* store p2p direction in ERF flags */
|
|
|
|
pinfo->pseudo_header->erf.phdr.flags |= pinfo->p2p_dir;
|
|
|
|
next_dissector = &erf_handle;
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
next_dissector = &data_handle;
|
|
|
|
}
|
2009-11-05 21:54:06 +00:00
|
|
|
if (!*next_dissector) next_dissector = &data_handle;
|
2009-10-09 06:37:48 +00:00
|
|
|
return next_dissector;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
dissect_meta(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
|
|
|
|
{
|
|
|
|
#define META_HEADER_SIZE 8
|
|
|
|
guint16 schema, proto, hdrlen, reserved;
|
|
|
|
gint32 item_len;
|
|
|
|
proto_tree *meta_tree = NULL;
|
|
|
|
proto_item *ti = NULL;
|
|
|
|
tvbuff_t *next_tvb;
|
|
|
|
dissector_handle_t *next_dissector = &data_handle;
|
|
|
|
|
|
|
|
if (check_col(pinfo->cinfo, COL_PROTOCOL))
|
|
|
|
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, FALSE);
|
|
|
|
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);
|
|
|
|
|
|
|
|
if (item_len < 0) {
|
|
|
|
/* evaluate_meta_items signalled an error */
|
|
|
|
return; /* stop parsing */
|
|
|
|
}
|
|
|
|
|
|
|
|
if (hdrlen != item_len) {
|
|
|
|
expert_add_info_format(pinfo, ti, PI_MALFORMED, PI_ERROR, "Invalid Header Length");
|
|
|
|
proto_tree_add_text(tree, tvb, hdrlen+4, -1, "[Malformed Packet]");
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* find next subdissector based on the chosen schema */
|
|
|
|
switch (schema) {
|
|
|
|
case META_SCHEMA_PCAP:
|
|
|
|
/* TODO */
|
|
|
|
break;
|
|
|
|
case META_SCHEMA_DXT:
|
|
|
|
next_dissector = dxt_get_dissector(proto, pinfo);
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
next_dissector = &data_handle;
|
|
|
|
}
|
|
|
|
next_tvb = tvb_new_subset(tvb, item_len + META_HEADER_SIZE, -1, -1);
|
|
|
|
call_dissector(*next_dissector, next_tvb, pinfo, tree);
|
|
|
|
}
|
|
|
|
|
|
|
|
void
|
|
|
|
proto_register_meta(void)
|
|
|
|
{
|
|
|
|
static hf_register_info hf[] = {
|
|
|
|
/* metadata header */
|
2009-10-09 15:36:20 +00:00
|
|
|
{ &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, VALS(meta_proto_vals), 0, NULL, HFILL } },
|
|
|
|
{ &hf_meta_reserved, { "Reserved", "meta.reserved", FT_UINT16, BASE_HEX, NULL, 0, NULL, HFILL } },
|
2009-10-09 06:37:48 +00:00
|
|
|
|
|
|
|
/* general meta item */
|
2009-10-09 15:36:20 +00:00
|
|
|
{ &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, VALS(meta_id_vals), 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 } },
|
2009-11-05 21:54:06 +00:00
|
|
|
{ &hf_meta_item_data, { "Item Data", "meta.item.data", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL } },
|
2009-10-09 06:37:48 +00:00
|
|
|
|
|
|
|
/* specific meta items */
|
2009-10-09 15:36:20 +00:00
|
|
|
{ &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, { "IMSI", "meta.imsi", FT_UINT64, BASE_HEX, NULL, 0, NULL, HFILL } },
|
|
|
|
{ &hf_meta_item_imei, { "IMEI", "meta.imei", 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_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, { "Cell", "meta.cell", FT_UINT64, BASE_HEX, NULL, 0, NULL, HFILL } },
|
2009-10-09 06:37:48 +00:00
|
|
|
};
|
|
|
|
|
|
|
|
static gint *ett[] = {
|
|
|
|
&ett_meta,
|
|
|
|
&ett_meta_item
|
|
|
|
};
|
|
|
|
|
|
|
|
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));
|
|
|
|
}
|
|
|
|
|
|
|
|
void
|
|
|
|
proto_reg_handoff_meta(void)
|
|
|
|
{
|
|
|
|
dissector_handle_t meta_handle;
|
|
|
|
meta_handle = find_dissector("meta");
|
|
|
|
/* enable once WTAP_ENCAP_META exists
|
|
|
|
dissector_add("wtap_encap", WTAP_ENCAP_META, meta_handle);
|
|
|
|
*/
|
|
|
|
|
|
|
|
data_handle = find_dissector("data");
|
|
|
|
alcap_handle = find_dissector("alcap");
|
|
|
|
atm_untrunc_handle = find_dissector("atm_untruncated");
|
|
|
|
nbap_handle = find_dissector("nbap");
|
|
|
|
sscf_nni_handle = find_dissector("sscf-nni");
|
|
|
|
ethwithfcs_handle = find_dissector("eth_withfcs");
|
|
|
|
ethwithoutfcs_handle = find_dissector("eth_withoutfcs");
|
|
|
|
fphint_handle = find_dissector("fp_hint");
|
|
|
|
erf_handle = find_dissector("erf");
|
|
|
|
}
|