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wireshark/epan/dissectors/asn1/p1/packet-p1-template.c

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/* packet-p1.c
* Routines for X.411 (X.400 Message Transfer) packet dissection
* Graeme Lunt 2005
*
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "config.h"
#include <epan/packet.h>
#include <epan/prefs.h>
#include <epan/oids.h>
#include <epan/asn1.h>
#include <epan/expert.h>
#include <epan/strutil.h>
#include "packet-ber.h"
#include "packet-acse.h"
#include "packet-ros.h"
#include "packet-rtse.h"
#include "packet-x509af.h"
#include "packet-x509ce.h"
#include "packet-x509if.h"
#include "packet-x509sat.h"
#include "packet-p1.h"
#define PNAME "X.411 Message Transfer Service"
#define PSNAME "P1"
#define PFNAME "p1"
static guint global_p1_tcp_port = 102;
static dissector_handle_t tpkt_handle;
static void prefs_register_p1(void); /* forward declaration for use in preferences registration */
/* Initialize the protocol and registered fields */
static int proto_p1 = -1;
static int proto_p3 = -1;
static int hf_p1_MTS_APDU_PDU = -1;
static int hf_p1_MTABindArgument_PDU = -1;
static int hf_p1_MTABindResult_PDU = -1;
static int hf_p1_MTABindError_PDU = -1;
#include "packet-p1-hf.c"
/* Initialize the subtree pointers */
static gint ett_p1 = -1;
static gint ett_p3 = -1;
static gint ett_p1_content_unknown = -1;
static gint ett_p1_bilateral_information = -1;
static gint ett_p1_additional_information = -1;
static gint ett_p1_unknown_standard_extension = -1;
static gint ett_p1_unknown_extension_attribute_type = -1;
static gint ett_p1_unknown_tokendata_type = -1;
#include "packet-p1-ett.c"
static expert_field ei_p1_unknown_extension_attribute_type = EI_INIT;
static expert_field ei_p1_unknown_standard_extension = EI_INIT;
static expert_field ei_p1_unknown_built_in_content_type = EI_INIT;
static expert_field ei_p1_unknown_tokendata_type = EI_INIT;
static expert_field ei_p1_unsupported_pdu = EI_INIT;
static expert_field ei_p1_zero_pdu = EI_INIT;
/* Dissector tables */
static dissector_table_t p1_extension_dissector_table;
static dissector_table_t p1_extension_attribute_dissector_table;
static dissector_table_t p1_tokendata_dissector_table;
static dissector_handle_t p1_handle;
#include "packet-p1-table.c" /* operation and error codes */
#define P1_ADDRESS_CTX "p1-address-ctx"
typedef struct p1_address_ctx {
gboolean do_address;
const char *content_type_id;
gboolean report_unknown_content_type;
wmem_strbuf_t* oraddress;
} p1_address_ctx_t;
static void set_do_address(asn1_ctx_t* actx, gboolean do_address)
{
p1_address_ctx_t* ctx;
if (actx->subtree.tree_ctx == NULL) {
actx->subtree.tree_ctx = wmem_new0(wmem_packet_scope(), p1_address_ctx_t);
}
ctx = (p1_address_ctx_t*)actx->subtree.tree_ctx;
ctx->do_address = do_address;
}
static p1_address_ctx_t *get_do_address_ctx(asn1_ctx_t* actx)
{
p1_address_ctx_t* ctx = NULL;
if (actx->pinfo->private_table) {
/* First check if called from an extension attribute */
ctx = (p1_address_ctx_t *)g_hash_table_lookup(actx->pinfo->private_table, P1_ADDRESS_CTX);
}
if (!ctx) {
ctx = (p1_address_ctx_t*)actx->subtree.tree_ctx;
}
return ctx;
}
static void do_address(const char* addr, tvbuff_t* tvb_string, asn1_ctx_t* actx)
{
p1_address_ctx_t* ctx = get_do_address_ctx(actx);
if (ctx && ctx->do_address) {
if (addr) {
wmem_strbuf_append(ctx->oraddress, addr);
}
if (tvb_string) {
wmem_strbuf_append(ctx->oraddress, tvb_format_text(tvb_string, 0, tvb_captured_length(tvb_string)));
}
}
}
static void do_address_str(const char* addr, tvbuff_t* tvb_string, asn1_ctx_t* actx)
{
wmem_strbuf_t *ddatype = (wmem_strbuf_t *)actx->value_ptr;
p1_address_ctx_t* ctx = get_do_address_ctx(actx);
do_address(addr, tvb_string, actx);
if (ctx && ctx->do_address && ddatype && tvb_string)
wmem_strbuf_append(ddatype, tvb_format_text(tvb_string, 0, tvb_captured_length(tvb_string)));
}
static void do_address_str_tree(const char* addr, tvbuff_t* tvb_string, asn1_ctx_t* actx, proto_tree* tree)
{
wmem_strbuf_t *ddatype = (wmem_strbuf_t *)actx->value_ptr;
p1_address_ctx_t* ctx = get_do_address_ctx(actx);
do_address(addr, tvb_string, actx);
if (ctx && ctx->do_address && tvb_string && ddatype) {
if (wmem_strbuf_get_len(ddatype) > 0) {
proto_item_append_text (tree, " (%s=%s)", wmem_strbuf_get_str(ddatype), tvb_format_text(tvb_string, 0, tvb_captured_length(tvb_string)));
}
}
}
#include "packet-p1-fn.c"
#include "packet-p1-table11.c" /* operation argument/result dissectors */
#include "packet-p1-table21.c" /* error dissector */
static const ros_info_t p3_ros_info = {
"P3",
&proto_p3,
&ett_p3,
p3_opr_code_string_vals,
p3_opr_tab,
p3_err_code_string_vals,
p3_err_tab
};
void p1_initialize_content_globals (asn1_ctx_t* actx, proto_tree *tree, gboolean report_unknown_cont_type)
{
p1_address_ctx_t* ctx;
if (actx->subtree.tree_ctx == NULL) {
actx->subtree.tree_ctx = wmem_new0(wmem_packet_scope(), p1_address_ctx_t);
}
ctx = (p1_address_ctx_t*)actx->subtree.tree_ctx;
actx->subtree.top_tree = tree;
actx->external.direct_reference = NULL;
ctx->content_type_id = NULL;
ctx->report_unknown_content_type = report_unknown_cont_type;
}
const char* p1_get_last_oraddress (asn1_ctx_t* actx)
{
p1_address_ctx_t* ctx;
if ((actx == NULL) || (actx->subtree.tree_ctx == NULL))
return "";
ctx = (p1_address_ctx_t*)actx->subtree.tree_ctx;
if (wmem_strbuf_get_len(ctx->oraddress) <= 0)
return "";
return wmem_strbuf_get_str(ctx->oraddress);
}
/*
* Dissect P1 MTS APDU
*/
int
dissect_p1_mts_apdu (tvbuff_t *tvb, packet_info *pinfo, proto_tree *parent_tree, void* data _U_)
{
proto_item *item=NULL;
proto_tree *tree=NULL;
asn1_ctx_t asn1_ctx;
asn1_ctx_init(&asn1_ctx, ASN1_ENC_BER, TRUE, pinfo);
/* save parent_tree so subdissectors can create new top nodes */
p1_initialize_content_globals (&asn1_ctx, parent_tree, TRUE);
if (parent_tree) {
item = proto_tree_add_item(parent_tree, proto_p1, tvb, 0, -1, ENC_NA);
tree = proto_item_add_subtree(item, ett_p1);
}
col_set_str(pinfo->cinfo, COL_PROTOCOL, "P1");
col_set_str(pinfo->cinfo, COL_INFO, "Transfer");
dissect_p1_MTS_APDU (FALSE, tvb, 0, &asn1_ctx, tree, hf_p1_MTS_APDU_PDU);
p1_initialize_content_globals (&asn1_ctx, NULL, FALSE);
return tvb_captured_length(tvb);
}
/*
* Dissect P1 PDUs inside a PPDU.
*/
static int
dissect_p1(tvbuff_t *tvb, packet_info *pinfo, proto_tree *parent_tree, void* data)
{
int offset = 0;
int old_offset;
proto_item *item;
proto_tree *tree;
struct SESSION_DATA_STRUCTURE* session;
int (*p1_dissector)(gboolean implicit_tag _U_, tvbuff_t *tvb, int offset, asn1_ctx_t *actx _U_, proto_tree *tree, int hf_index _U_) = NULL;
const char *p1_op_name;
int hf_p1_index = -1;
asn1_ctx_t asn1_ctx;
asn1_ctx_init(&asn1_ctx, ASN1_ENC_BER, TRUE, pinfo);
/* do we have operation information from the ROS dissector? */
if (data == NULL)
return 0;
session = (struct SESSION_DATA_STRUCTURE*)data;
/* save parent_tree so subdissectors can create new top nodes */
p1_initialize_content_globals (&asn1_ctx, parent_tree, TRUE);
asn1_ctx.private_data = session;
item = proto_tree_add_item(parent_tree, proto_p1, tvb, 0, -1, ENC_NA);
tree = proto_item_add_subtree(item, ett_p1);
col_set_str(pinfo->cinfo, COL_PROTOCOL, "P1");
col_clear(pinfo->cinfo, COL_INFO);
switch(session->ros_op & ROS_OP_MASK) {
case (ROS_OP_BIND | ROS_OP_ARGUMENT): /* BindInvoke */
p1_dissector = dissect_p1_MTABindArgument;
p1_op_name = "Bind-Argument";
hf_p1_index = hf_p1_MTABindArgument_PDU;
break;
case (ROS_OP_BIND | ROS_OP_RESULT): /* BindResult */
p1_dissector = dissect_p1_MTABindResult;
p1_op_name = "Bind-Result";
hf_p1_index = hf_p1_MTABindResult_PDU;
break;
case (ROS_OP_BIND | ROS_OP_ERROR): /* BindError */
p1_dissector = dissect_p1_MTABindError;
p1_op_name = "Bind-Error";
hf_p1_index = hf_p1_MTABindError_PDU;
break;
case (ROS_OP_INVOKE | ROS_OP_ARGUMENT): /* Invoke Argument */
p1_dissector = dissect_p1_MTS_APDU;
p1_op_name = "Transfer";
hf_p1_index = hf_p1_MTS_APDU_PDU;
break;
default:
proto_tree_add_expert(tree, pinfo, &ei_p1_unsupported_pdu, tvb, offset, -1);
return tvb_captured_length(tvb);
}
col_set_str(pinfo->cinfo, COL_INFO, p1_op_name);
while (tvb_reported_length_remaining(tvb, offset) > 0) {
old_offset=offset;
offset=(*p1_dissector)(FALSE, tvb, offset, &asn1_ctx , tree, hf_p1_index);
if (offset == old_offset) {
proto_tree_add_expert(tree, pinfo, &ei_p1_zero_pdu, tvb, offset, -1);
break;
}
}
p1_initialize_content_globals (&asn1_ctx, NULL, FALSE);
return tvb_captured_length(tvb);
}
/*--- proto_register_p1 -------------------------------------------*/
void proto_register_p1(void) {
/* List of fields */
static hf_register_info hf[] =
{
/* "Created by defining PDU in .cnf */
{ &hf_p1_MTABindArgument_PDU,
{ "MTABindArgument", "p1.MTABindArgument",
FT_UINT32, BASE_DEC, VALS(p1_MTABindArgument_vals), 0,
"p1.MTABindArgument", HFILL }},
{ &hf_p1_MTABindResult_PDU,
{ "MTABindResult", "p1.MTABindResult",
FT_UINT32, BASE_DEC, VALS(p1_MTABindResult_vals), 0,
"p1.MTABindResult", HFILL }},
{ &hf_p1_MTABindError_PDU,
{ "MTABindError", "p1.MTABindError",
FT_UINT32, BASE_DEC, VALS(p1_MTABindError_vals), 0,
"p1.MTABindError", HFILL }},
{ &hf_p1_MTS_APDU_PDU,
{ "MTS-APDU", "p1.MTS_APDU",
FT_UINT32, BASE_DEC, VALS(p1_MTS_APDU_vals), 0,
"p1.MTS_APDU", HFILL }},
#include "packet-p1-hfarr.c"
};
/* List of subtrees */
static gint *ett[] = {
&ett_p1,
&ett_p3,
&ett_p1_content_unknown,
&ett_p1_bilateral_information,
&ett_p1_additional_information,
&ett_p1_unknown_standard_extension,
&ett_p1_unknown_extension_attribute_type,
&ett_p1_unknown_tokendata_type,
#include "packet-p1-ettarr.c"
};
static ei_register_info ei[] = {
{ &ei_p1_unknown_extension_attribute_type, { "p1.unknown.extension_attribute_type", PI_UNDECODED, PI_WARN, "Unknown extension-attribute-type", EXPFILL }},
{ &ei_p1_unknown_standard_extension, { "p1.unknown.standard_extension", PI_UNDECODED, PI_WARN, "Unknown standard-extension", EXPFILL }},
{ &ei_p1_unknown_built_in_content_type, { "p1.unknown.built_in_content_type", PI_UNDECODED, PI_WARN, "P1 Unknown Content (unknown built-in content-type)", EXPFILL }},
{ &ei_p1_unknown_tokendata_type, { "p1.unknown.tokendata_type", PI_UNDECODED, PI_WARN, "Unknown tokendata-type", EXPFILL }},
{ &ei_p1_unsupported_pdu, { "p1.unsupported_pdu", PI_UNDECODED, PI_WARN, "Unsupported P1 PDU", EXPFILL }},
{ &ei_p1_zero_pdu, { "p1.zero_pdu", PI_PROTOCOL, PI_ERROR, "Internal error, zero-byte P1 PDU", EXPFILL }},
};
expert_module_t* expert_p1;
module_t *p1_module;
/* Register protocol */
proto_p1 = proto_register_protocol(PNAME, PSNAME, PFNAME);
p1_handle = register_dissector("p1", dissect_p1, proto_p1);
proto_p3 = proto_register_protocol("X.411 Message Access Service", "P3", "p3");
/* Register fields and subtrees */
proto_register_field_array(proto_p1, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
expert_p1 = expert_register_protocol(proto_p1);
expert_register_field_array(expert_p1, ei, array_length(ei));
p1_extension_dissector_table = register_dissector_table("p1.extension", "P1-EXTENSION", proto_p1, FT_UINT32, BASE_DEC);
p1_extension_attribute_dissector_table = register_dissector_table("p1.extension-attribute", "P1-EXTENSION-ATTRIBUTE", proto_p1, FT_UINT32, BASE_DEC);
p1_tokendata_dissector_table = register_dissector_table("p1.tokendata", "P1-TOKENDATA", proto_p1, FT_UINT32, BASE_DEC);
/* Register our configuration options for P1, particularly our port */
p1_module = prefs_register_protocol_subtree("OSI/X.400", proto_p1, prefs_register_p1);
prefs_register_uint_preference(p1_module, "tcp.port", "P1 TCP Port",
"Set the port for P1 operations (if other"
" than the default of 102)",
10, &global_p1_tcp_port);
register_ber_syntax_dissector("P1 Message", proto_p1, dissect_p1_mts_apdu);
#include "packet-p1-syn-reg.c"
}
/*--- proto_reg_handoff_p1 --- */
void proto_reg_handoff_p1(void) {
#include "packet-p1-dis-tab.c"
/* APPLICATION CONTEXT */
oid_add_from_string("id-ac-mts-transfer","2.6.0.1.6");
/* ABSTRACT SYNTAXES */
register_rtse_oid_dissector_handle("2.6.0.2.12", p1_handle, 0, "id-as-mta-rtse", TRUE);
register_rtse_oid_dissector_handle("2.6.0.2.7", p1_handle, 0, "id-as-mtse", FALSE);
register_rtse_oid_dissector_handle("applicationProtocol.1", p1_handle, 0, "mts-transfer-protocol-1984", FALSE);
register_rtse_oid_dissector_handle("applicationProtocol.12", p1_handle, 0, "mta-transfer-protocol", FALSE);
/* the ROS dissector will use the registered P3 ros info */
register_rtse_oid_dissector_handle(id_as_mts_rtse, NULL, 0, "id-as-mts-rtse", TRUE);
register_rtse_oid_dissector_handle(id_as_msse, NULL, 0, "id-as-msse", TRUE);
/* remember the tpkt handler for change in preferences */
tpkt_handle = find_dissector("tpkt");
/* APPLICATION CONTEXT */
oid_add_from_string("id-ac-mts-access-88", id_ac_mts_access_88);
oid_add_from_string("id-ac-mts-forced-access-88", id_ac_mts_forced_access_88);
oid_add_from_string("id-ac-mts-access-94", id_ac_mts_access_94);
oid_add_from_string("id-ac-mts-forced-access-94", id_ac_mts_forced_access_94);
/* Register P3 with ROS */
register_ros_protocol_info(id_as_msse, &p3_ros_info, 0, "id-as-msse", FALSE);
register_ros_protocol_info(id_as_mdse_88, &p3_ros_info, 0, "id-as-mdse-88", FALSE);
register_ros_protocol_info(id_as_mdse_94, &p3_ros_info, 0, "id-as-mdse-94", FALSE);
register_ros_protocol_info(id_as_mase_88, &p3_ros_info, 0, "id-as-mase-88", FALSE);
register_ros_protocol_info(id_as_mase_94, &p3_ros_info, 0, "id-as-mase-94", FALSE);
register_ros_protocol_info(id_as_mts, &p3_ros_info, 0, "id-as-mts", FALSE);
register_ros_protocol_info(id_as_mts_rtse, &p3_ros_info, 0, "id-as-mts-rtse", TRUE);
}
static void
prefs_register_p1(void)
{
static guint tcp_port = 0;
/* de-register the old port */
/* port 102 is registered by TPKT - don't undo this! */
if ((tcp_port > 0) && (tcp_port != 102) && tpkt_handle)
dissector_delete_uint("tcp.port", tcp_port, tpkt_handle);
/* Set our port number for future use */
tcp_port = global_p1_tcp_port;
if ((tcp_port > 0) && (tcp_port != 102) && tpkt_handle)
dissector_add_uint("tcp.port", tcp_port, tpkt_handle);
}
/*
* Editor modelines - http://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:
*/
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