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/* packet-exported_pdu.c
* Routines for exported_pdu dissection
* Copyright 2013, Anders Broman <anders-broman@ericsson.com>
*
* $Id$
*
* 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.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "config.h"
#include <glib.h>
#include <epan/packet.h>
#include <epan/tap.h>
#include <epan/exported_pdu.h>
void proto_reg_handoff_exported_pdu(void);
static gint exported_pdu_tap = -1;
static int proto_exported_pdu = -1;
static int hf_exported_pdu_tag = -1;
static int hf_exported_pdu_tag_len = -1;
static int hf_exported_pdu_prot_name = -1;
static int hf_exported_pdu_ipv4_src = -1;
static int hf_exported_pdu_ipv4_dst = -1;
static int hf_exported_pdu_src_port = -1;
static int hf_exported_pdu_dst_port = -1;
/* Initialize the subtree pointers */
static gint ett_exported_pdu = -1;
#define EXPORTED_PDU_NEXT_PROTO_STR 0
static const value_string exported_pdu_tag_vals[] = {
{ EXP_PDU_TAG_END_OF_OPT, "End-of-options" },
/* 1 - 9 reserved */
{ EXP_PDU_TAG_OPTIONS_LENGTH, "Total length of the options exluding this TLV" },
{ EXP_PDU_TAG_LINKTYPE, "Linktype value" },
{ EXP_PDU_TAG_PROTO_NAME, "PDU content protocol name" },
/* Add protocol type related tags here */
/* 13 - 19 reserved */
{ EXP_PDU_TAG_IPV4_SRC, "IPv4 Source Address" },
{ EXP_PDU_TAG_IPV4_DST, "IPv4 Destination Address" },
{ EXP_PDU_TAG_IPV6_SRC, "IPv6 Source Address" },
{ EXP_PDU_TAG_IPV6_DST, "IPv4 Destination Address" },
{ EXP_PDU_TAG_SRC_PORT, "Source Port" },
{ EXP_PDU_TAG_DST_PORT, "Destination Port" },
{ EXP_PDU_TAG_SCTP_PPID, "SCTP ppid" },
{ EXP_PDU_TAG_SS7_OPC, "SS7 OPC" },
{ EXP_PDU_TAG_SS7_DPC, "SS7 DPC" },
{ 0, NULL }
};
/* Code to actually dissect the packets */
static void
dissect_exported_pdu(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
proto_item *ti;
proto_tree *exported_pdu_tree;
tvbuff_t * payload_tvb = NULL;
int offset = 0;
guint16 tag;
int tag_len;
int next_proto_type = -1;
char *proto_name = NULL;
const guchar *src_addr, *dst_addr;
col_set_str(pinfo->cinfo, COL_PROTOCOL, "Exported PDU");
/* create display subtree for the protocol */
ti = proto_tree_add_item(tree, proto_exported_pdu, tvb, offset, -1, ENC_NA);
exported_pdu_tree = proto_item_add_subtree(ti, ett_exported_pdu);
tag = tvb_get_ntohs(tvb, offset);
proto_tree_add_item(exported_pdu_tree, hf_exported_pdu_tag, tvb, offset, 2, ENC_BIG_ENDIAN);
offset+=2;
proto_tree_add_item(exported_pdu_tree, hf_exported_pdu_tag_len, tvb, offset, 2, ENC_BIG_ENDIAN);
tag_len = tvb_get_ntohs(tvb, offset);
offset+=2;
while(tag != 0){
switch(tag){
case EXP_PDU_TAG_PROTO_NAME:
next_proto_type = EXPORTED_PDU_NEXT_PROTO_STR;
proto_name = tvb_get_ephemeral_string(tvb, offset, tag_len);
proto_tree_add_item(exported_pdu_tree, hf_exported_pdu_prot_name, tvb, offset, tag_len, ENC_BIG_ENDIAN);
break;
case EXP_PDU_TAG_IPV4_SRC:
proto_tree_add_item(exported_pdu_tree, hf_exported_pdu_ipv4_src, tvb, offset, 4, ENC_BIG_ENDIAN);
src_addr = tvb_get_ptr(tvb, offset, 4);
SET_ADDRESS(&pinfo->net_src, AT_IPv4, 4, src_addr);
SET_ADDRESS(&pinfo->src, AT_IPv4, 4, src_addr);
break;
case EXP_PDU_TAG_IPV4_DST:
proto_tree_add_item(exported_pdu_tree, hf_exported_pdu_ipv4_dst, tvb, offset, 4, ENC_BIG_ENDIAN);
dst_addr = tvb_get_ptr(tvb, offset, 4);
SET_ADDRESS(&pinfo->net_dst, AT_IPv4, 4, dst_addr);
SET_ADDRESS(&pinfo->dst, AT_IPv4, 4, dst_addr);
break;
case EXP_PDU_TAG_SRC_PORT:
proto_tree_add_item(exported_pdu_tree, hf_exported_pdu_src_port, tvb, offset, 4, ENC_BIG_ENDIAN);
pinfo->srcport = tvb_get_ntohl(tvb,offset);
break;
case EXP_PDU_TAG_DST_PORT:
proto_tree_add_item(exported_pdu_tree, hf_exported_pdu_dst_port, tvb, offset, 4, ENC_BIG_ENDIAN);
pinfo->destport = tvb_get_ntohl(tvb,offset);
break;
default:
break;
};
offset = offset + tag_len;
proto_tree_add_item(exported_pdu_tree, hf_exported_pdu_tag, tvb, offset, 2, ENC_BIG_ENDIAN);
tag = tvb_get_ntohs(tvb, offset);
offset+=2;
proto_tree_add_item(exported_pdu_tree, hf_exported_pdu_tag_len, tvb, offset, 2, ENC_BIG_ENDIAN);
tag_len = tvb_get_ntohs(tvb, offset);
offset+=2;
}
payload_tvb = tvb_new_subset_remaining(tvb, offset);
switch(next_proto_type){
case EXPORTED_PDU_NEXT_PROTO_STR:
call_dissector(find_dissector(proto_name), payload_tvb, pinfo, tree);
break;
default:
break;
}
proto_tree_add_text(exported_pdu_tree, payload_tvb, 0, -1,"Exported PDU");
}
/* Register the protocol with Wireshark.
*
*/
void
proto_register_exported_pdu(void)
{
/*module_t *exported_pdu_module;*/
static hf_register_info hf[] = {
{ &hf_exported_pdu_tag,
{ "Tag", "exported_pdu.tag",
FT_UINT16, BASE_DEC, VALS(exported_pdu_tag_vals), 0,
NULL, HFILL }
},
{ &hf_exported_pdu_tag_len,
{ "Length", "exported_pdu.tag_len",
FT_UINT16, BASE_DEC, NULL, 0,
NULL, HFILL }
},
{ &hf_exported_pdu_prot_name,
{ "Protocol name", "exported_pdu.prot_name",
FT_STRING, BASE_NONE, NULL, 0,
NULL, HFILL }
},
{ &hf_exported_pdu_ipv4_src,
{ "IPv4 SRC", "exported_pdu.ipv4_src",
FT_IPv4, BASE_NONE, NULL, 0,
NULL, HFILL }
},
{ &hf_exported_pdu_ipv4_dst,
{ "IPv4 DST", "exported_pdu.ipv4_dst",
FT_IPv4, BASE_NONE, NULL, 0,
NULL, HFILL }
},
{ &hf_exported_pdu_src_port,
{ "Src Port", "exported_pdu.src_port",
FT_UINT16, BASE_DEC, NULL, 0,
NULL, HFILL }
},
{ &hf_exported_pdu_dst_port,
{ "Dst Port", "exported_pdu.dst_port",
FT_UINT16, BASE_DEC, NULL, 0,
NULL, HFILL }
},
};
/* Setup protocol subtree array */
static gint *ett[] = {
&ett_exported_pdu
};
/* Register the protocol name and description */
proto_exported_pdu = proto_register_protocol("EXPORTED_PDU",
"exported_pdu", "exported_pdu");
register_dissector("exported_pdu", dissect_exported_pdu, proto_exported_pdu);
/* Required function calls to register the header fields and subtrees */
proto_register_field_array(proto_exported_pdu, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
#if 0
exported_pdu_module = prefs_register_protocol(exported_pdu,
proto_reg_handoff_exported_pdu);
prefs_register_bool_preference(exported_pdu_module, "show_hex",
"Display numbers in Hex",
"Enable to display numerical values in hexadecimal.",
&gPREF_HEX);
* Register an example port preference */
prefs_register_uint_preference(exported_pdu_module, "tcp.port", "exported_pdu TCP Port",
" exported_pdu TCP port if other than the default",
10, &gPORT_PREF);
#endif
/* Register for tapping
* The tap is registered here but it is to be used by dissectors that
* want to export their PDU:s, see packet-sip.c
*/
exported_pdu_tap = register_tap("export_pdu");
}
void
proto_reg_handoff_exported_pdu(void)
{
#if 0
static gboolean initialized = FALSE;
static dissector_handle_t exported_pdu_handle;
if (!initialized) {
exported_pdu_handle = find_dissector("exported_pdu");
initialized = TRUE;
}
#endif
}
/*
* 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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