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/* packet-isi.c
* Dissector for ISI protocol
* Copyright 2010, Sebastian Reichel <sre@ring0.de>
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <glib.h>
#include <epan/prefs.h>
#include <epan/packet.h>
#include "packet-isi.h"
#include "isi-simauth.h"
#include "isi-gps.h"
#define ISI_LTYPE 0xF5
int proto_isi = -1;
/* These are the handles of our subdissectors */
static dissector_handle_t data_handle=NULL;
static dissector_handle_t isi_handle;
/* Dissector table for the isi resource */
static dissector_table_t isi_resource_dissector_table;
/* Forward-declare the dissector functions */
static void dissect_isi(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree);
static const value_string hf_isi_device[] = {
{0x00, "Modem" },
{0x6c, "Host" },
{0xFF, "Any" },
{0x00, NULL },
};
static const value_string hf_isi_resource[] = {
{0x01, "Call"},
{0x02, "SMS"},
{0x06, "Subscriber Services"},
{0x08, "SIM Authentication"},
{0x09, "SIM"},
{0x0A, "Network"},
{0x10, "Indication"},
{0x15, "MTC"},
{0x1B, "Phone Information"},
{0x31, "GPRS"},
{0x54, "GPS"},
{0x62, "EPOC Info"}
};
static guint32 hf_isi_rdev = -1;
static guint32 hf_isi_sdev = -1;
static guint32 hf_isi_res = -1;
static guint32 hf_isi_len = -1;
static guint32 hf_isi_robj = -1;
static guint32 hf_isi_sobj = -1;
static guint32 hf_isi_id = -1;
/* Subtree handles: set by register_subtree_array */
static guint32 ett_isi = -1;
guint32 ett_isi_msg = -1;
/* Handler registration */
void proto_reg_handoff_isi(void) {
static gboolean initialized=FALSE;
if (!initialized) {
data_handle = find_dissector("data");
isi_handle = create_dissector_handle(dissect_isi, proto_isi);
dissector_add("sll.ltype", ISI_LTYPE, isi_handle);
/* handoff resource dissectors */
proto_reg_handoff_isi_sim_auth();
proto_reg_handoff_isi_gps();
}
}
void proto_register_isi(void) {
/* A header field is something you can search/filter on.
*
* We create a structure to register our fields. It consists of an
* array of hf_register_info structures, each of which are of the format
* {&(field id), {name, abbrev, type, display, strings, bitmask, blurb, HFILL}}.
*/
static hf_register_info hf[] = {
{ &hf_isi_rdev,
{ "Receiver Device", "isi.rdev", FT_UINT8, BASE_HEX,
VALS(hf_isi_device), 0x0, "Receiver Device ID", HFILL }},
{ &hf_isi_sdev,
{ "Sender Device", "isi.sdev", FT_UINT8, BASE_HEX,
VALS(hf_isi_device), 0x0, "Sender Device ID", HFILL }},
{ &hf_isi_res,
{ "Resource", "isi.res", FT_UINT8, BASE_HEX,
VALS(hf_isi_resource), 0x0, "Resource ID", HFILL }},
{ &hf_isi_len,
{ "Length", "isi.len", FT_UINT16, BASE_DEC,
NULL, 0x0, "Length", HFILL }},
{ &hf_isi_robj,
{ "Receiver Object", "isi.robj", FT_UINT8, BASE_HEX,
NULL, 0x0, "Receiver Object", HFILL }},
{ &hf_isi_sobj,
{ "Sender Object", "isi.sobj", FT_UINT8, BASE_HEX,
NULL, 0x0, "Sender Object", HFILL }},
{ &hf_isi_id,
{ "Packet ID", "isi.id", FT_UINT8, BASE_DEC,
NULL, 0x0, "Packet ID", HFILL }}
};
static gint *ett[] = {
&ett_isi,
&ett_isi_msg
};
proto_isi = proto_register_protocol("Intelligent Service Interface", "ISI", "isi");
proto_register_field_array(proto_isi, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
register_dissector("isi", dissect_isi, proto_isi);
/* create new dissector table for isi resource */
isi_resource_dissector_table = register_dissector_table("isi.resource", "ISI resource", FT_UINT8, BASE_HEX);
/* register resource dissectors */
proto_register_isi_sim_auth();
proto_register_isi_gps();
}
/* The dissector itself */
static void dissect_isi(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) {
proto_tree *isi_tree = NULL;
guint position = 0;
proto_item *item = NULL;
tvbuff_t *content = NULL;
guint8 src = 0;
guint8 dst = 0;
guint8 resource = 0;
guint16 length = 0;
if(check_col(pinfo->cinfo, COL_PROTOCOL))
col_set_str(pinfo->cinfo, COL_PROTOCOL, "ISI");
if(check_col(pinfo->cinfo,COL_INFO))
col_clear(pinfo->cinfo,COL_INFO);
if(tree) {
/* If tree != NULL, we're doing a detailed dissection of the
* packet, so we need to construct a tree. */
/* Start with a top-level item to add everything else to */
item = proto_tree_add_item(tree, proto_isi, tvb, position, -1, FALSE);
isi_tree = proto_item_add_subtree(item, ett_isi);
/* Common Phonet/ISI Header */
proto_tree_add_item(isi_tree, hf_isi_rdev, tvb, 0, 1, FALSE);
proto_tree_add_item(isi_tree, hf_isi_sdev, tvb, 1, 1, FALSE);
proto_tree_add_item(isi_tree, hf_isi_res, tvb, 2, 1, FALSE);
proto_tree_add_item(isi_tree, hf_isi_len, tvb, 3, 2, FALSE);
proto_tree_add_item(isi_tree, hf_isi_robj, tvb, 5, 1, FALSE);
proto_tree_add_item(isi_tree, hf_isi_sobj, tvb, 6, 1, FALSE);
proto_tree_add_item(isi_tree, hf_isi_id, tvb, 7, 1, FALSE);
length = tvb_get_ntohs(tvb, 3) - 3;
resource = tvb_get_guint8(tvb, 2);
dst = tvb_get_guint8(tvb, 0);
src = tvb_get_guint8(tvb, 1);
if(tvb->length - 8 < length) {
expert_add_info_format(pinfo, item, PI_PROTOCOL, PI_WARN, "Broken Length (%d > %d)", length, tvb->length-8);
length = tvb->length - 8;
}
col_set_str(pinfo->cinfo, COL_DEF_SRC, val_to_str_const(src, hf_isi_device, "Unknown"));
col_set_str(pinfo->cinfo, COL_DEF_DST, val_to_str_const(dst, hf_isi_device, "Unknown"));
content = tvb_new_subset(tvb, 8, length, length);
/* Call subdissector depending on the resource ID */
if(!dissector_try_port(isi_resource_dissector_table, resource, content, pinfo, isi_tree))
call_dissector(data_handle, content, pinfo, isi_tree);
}
}
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