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/* packet-pingpongprotocol.c
* Routines for the Ping Pong Protocol, a test application of the
* rsplib RSerPool implementation
* http://www.tdr.wiwi.uni-due.de/forschung/forschungsprojekte/reliable-server-pooling//
*
* Copyright 2006 by Thomas Dreibholz <dreibh [AT] exp-math.uni-essen.de>
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* Copied from README.developer
*
* 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/sctpppids.h>
#define PINGPONGPROTOCOL_PAYLOAD_PROTOCOL_ID_LEGACY 0x29097602
void proto_register_pingpongprotocol(void);
void proto_reg_handoff_pingpongprotocol(void);
/* Initialize the protocol and registered fields */
static int proto_pingpongprotocol = -1;
static int hf_message_type = -1;
static int hf_message_flags = -1;
static int hf_message_length = -1;
static int hf_ping_messageno = -1;
static int hf_ping_data = -1;
static int hf_pong_messageno = -1;
static int hf_pong_replyno = -1;
static int hf_pong_data = -1;
/* Initialize the subtree pointers */
static gint ett_pingpongprotocol = -1;
/* Dissectors for messages. This is specific to PingPongProtocol */
#define MESSAGE_TYPE_LENGTH 1
#define MESSAGE_FLAGS_LENGTH 1
#define MESSAGE_LENGTH_LENGTH 2
#define MESSAGE_TYPE_OFFSET 0
#define MESSAGE_FLAGS_OFFSET (MESSAGE_TYPE_OFFSET + MESSAGE_TYPE_LENGTH)
#define MESSAGE_LENGTH_OFFSET (MESSAGE_FLAGS_OFFSET + MESSAGE_FLAGS_LENGTH)
#define MESSAGE_VALUE_OFFSET (MESSAGE_LENGTH_OFFSET + MESSAGE_LENGTH_LENGTH)
#define PING_MESSAGENO_LENGTH 8
#define PING_MESSAGENO_OFFSET MESSAGE_VALUE_OFFSET
#define PING_DATA_OFFSET (PING_MESSAGENO_OFFSET + PING_MESSAGENO_LENGTH)
#define PONG_MESSAGENO_LENGTH 8
#define PONG_REPLYNO_LENGTH 8
#define PONG_MESSAGENO_OFFSET MESSAGE_VALUE_OFFSET
#define PONG_REPLYNO_OFFSET (PONG_MESSAGENO_OFFSET + PONG_MESSAGENO_LENGTH)
#define PONG_DATA_OFFSET (PONG_REPLYNO_OFFSET + PONG_REPLYNO_LENGTH)
#define PINGPONG_PING_MESSAGE_TYPE 0x01
#define PINGPONG_PONG_MESSAGE_TYPE 0x02
static const value_string message_type_values[] = {
{ PINGPONG_PONG_MESSAGE_TYPE, "PingPongProtocol Pong" },
{ PINGPONG_PING_MESSAGE_TYPE, "PingPongProtocol Ping" },
{ 0, NULL }
};
static void
dissect_pingpongprotocol_ping_message(tvbuff_t *message_tvb, proto_tree *message_tree)
{
guint16 ping_data_length;
proto_tree_add_item(message_tree, hf_ping_messageno, message_tvb, PING_MESSAGENO_OFFSET, PING_MESSAGENO_LENGTH, ENC_BIG_ENDIAN);
ping_data_length = tvb_get_ntohs(message_tvb, MESSAGE_LENGTH_OFFSET) - PING_DATA_OFFSET;
if (ping_data_length > 0)
proto_tree_add_item(message_tree, hf_ping_data, message_tvb, PING_DATA_OFFSET, ping_data_length, ENC_NA);
}
static void
dissect_pingpongprotocol_pong_message(tvbuff_t *message_tvb, proto_tree *message_tree)
{
guint16 pong_data_length;
proto_tree_add_item(message_tree, hf_pong_messageno, message_tvb, PONG_MESSAGENO_OFFSET, PONG_MESSAGENO_LENGTH, ENC_BIG_ENDIAN);
proto_tree_add_item(message_tree, hf_pong_replyno, message_tvb, PONG_REPLYNO_OFFSET, PONG_REPLYNO_LENGTH, ENC_BIG_ENDIAN);
pong_data_length = tvb_get_ntohs(message_tvb, MESSAGE_LENGTH_OFFSET) - PONG_DATA_OFFSET;
if (pong_data_length > 0) {
proto_tree_add_item(message_tree, hf_pong_data, message_tvb, PONG_DATA_OFFSET, pong_data_length, ENC_NA);
}
}
static void
dissect_pingpongprotocol_message(tvbuff_t *message_tvb, packet_info *pinfo, proto_tree *pingpongprotocol_tree)
{
guint8 type;
type = tvb_get_guint8(message_tvb, MESSAGE_TYPE_OFFSET);
col_add_fstr(pinfo->cinfo, COL_INFO, "%s ", val_to_str_const(type, message_type_values, "Unknown PingPongProtocol type"));
proto_tree_add_item(pingpongprotocol_tree, hf_message_type, message_tvb, MESSAGE_TYPE_OFFSET, MESSAGE_TYPE_LENGTH, ENC_BIG_ENDIAN);
proto_tree_add_item(pingpongprotocol_tree, hf_message_flags, message_tvb, MESSAGE_FLAGS_OFFSET, MESSAGE_FLAGS_LENGTH, ENC_BIG_ENDIAN);
proto_tree_add_item(pingpongprotocol_tree, hf_message_length, message_tvb, MESSAGE_LENGTH_OFFSET, MESSAGE_LENGTH_LENGTH, ENC_BIG_ENDIAN);
switch (type) {
case PINGPONG_PING_MESSAGE_TYPE:
dissect_pingpongprotocol_ping_message(message_tvb, pingpongprotocol_tree);
break;
case PINGPONG_PONG_MESSAGE_TYPE:
dissect_pingpongprotocol_pong_message(message_tvb, pingpongprotocol_tree);
break;
}
}
static int
dissect_pingpongprotocol(tvbuff_t *message_tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
{
proto_item *pingpongprotocol_item;
proto_tree *pingpongprotocol_tree;
col_set_str(pinfo->cinfo, COL_PROTOCOL, "PingPongProtocol");
/* In the interest of speed, if "tree" is NULL, don't do any work not
necessary to generate protocol tree items. */
if (tree) {
/* create the pingpongprotocol protocol tree */
pingpongprotocol_item = proto_tree_add_item(tree, proto_pingpongprotocol, message_tvb, 0, -1, ENC_NA);
pingpongprotocol_tree = proto_item_add_subtree(pingpongprotocol_item, ett_pingpongprotocol);
} else {
pingpongprotocol_tree = NULL;
};
/* dissect the message */
dissect_pingpongprotocol_message(message_tvb, pinfo, pingpongprotocol_tree);
return(TRUE);
}
/* Register the protocol with Wireshark */
void
proto_register_pingpongprotocol(void)
{
/* Setup list of header fields */
static hf_register_info hf[] = {
{ &hf_message_type, { "Type", "pingpongprotocol.message_type", FT_UINT8, BASE_DEC, VALS(message_type_values), 0x0, NULL, HFILL } },
{ &hf_message_flags, { "Flags", "pingpongprotocol.message_flags", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL } },
{ &hf_message_length, { "Length", "pingpongprotocol.message_length", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL } },
{ &hf_ping_messageno, { "MessageNo", "pingpongprotocol.ping_messageno", FT_UINT64, BASE_DEC, NULL, 0x0, NULL, HFILL } },
{ &hf_ping_data, { "Ping_Data", "pingpongprotocol.ping_data", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL } },
{ &hf_pong_messageno, { "MessageNo", "pingpongprotocol.pong_messageno", FT_UINT64, BASE_DEC, NULL, 0x0, NULL, HFILL } },
{ &hf_pong_replyno, { "ReplyNo", "pingpongprotocol.pong_replyno", FT_UINT64, BASE_DEC, NULL, 0x0, NULL, HFILL } },
{ &hf_pong_data, { "Pong_Data", "pingpongprotocol.pong_data", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL } },
};
/* Setup protocol subtree array */
static gint *ett[] = {
&ett_pingpongprotocol
};
/* Register the protocol name and description */
proto_pingpongprotocol = proto_register_protocol("Ping Pong Protocol", "PingPongProtocol", "pingpongprotocol");
/* Required function calls to register the header fields and subtrees used */
proto_register_field_array(proto_pingpongprotocol, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
}
void
proto_reg_handoff_pingpongprotocol(void)
{
dissector_handle_t pingpongprotocol_handle;
pingpongprotocol_handle = create_dissector_handle(dissect_pingpongprotocol, proto_pingpongprotocol);
dissector_add_uint("sctp.ppi", PINGPONGPROTOCOL_PAYLOAD_PROTOCOL_ID_LEGACY, pingpongprotocol_handle);
dissector_add_uint("sctp.ppi", PPP_PAYLOAD_PROTOCOL_ID, pingpongprotocol_handle);
}
/*
* Editor modelines - http://www.wireshark.org/tools/modelines.html
*
* Local Variables:
* c-basic-offset: 2
* tab-width: 8
* indent-tabs-mode: nil
* End:
*
* ex: set shiftwidth=2 tabstop=8 expandtab:
* :indentSize=2:tabSize=8:noTabs=true:
*/
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