/* packet-tuxedo.c
 * Routines for BEA Tuxedo ATMI protocol
 *
 * metatech <metatech@flashmail.com>
 *
 * Wireshark - Network traffic analyzer
 * By Gerald Combs <gerald@wireshark.org>
 * Copyright 1998 Gerald Combs
 *
 * SPDX-License-Identifier: GPL-2.0-or-later
 */

#include "config.h"

#include <epan/packet.h>
#include <epan/conversation.h>

void proto_register_tuxedo(void);
void proto_reg_handoff_tuxedo(void);

static int proto_tuxedo;
static int hf_tuxedo_magic;
static int hf_tuxedo_opcode;

static int ett_tuxedo;

static dissector_handle_t tuxedo_handle;

#define TUXEDO_MAGIC           0x91039858
#define TUXEDO_SMAGIC          0x73903842

#define TUXEDO_ATMI_CALL                 1
#define TUXEDO_ATMI_REPLY                2
#define TUXEDO_ATMI_FAILURE              3
#define TUXEDO_ATMI_CONNECT              4
#define TUXEDO_ATMI_DATA                 5
#define TUXEDO_ATMI_DISCON               6
#define TUXEDO_ATMI_PREPARE              7
#define TUXEDO_ATMI_READY                8
#define TUXEDO_ATMI_COMMIT               9
#define TUXEDO_ATMI_DONE                10
#define TUXEDO_ATMI_COMPLETE            11
#define TUXEDO_ATMI_ROLLBACK            12
#define TUXEDO_ATMI_HEURISTIC           13
#define TUXEDO_ATMI_PRE_NW_ACALL1       14
#define TUXEDO_ATMI_PRE_NW_ACALL1_RPLY  15
#define TUXEDO_ATMI_PRE_NW_ACALL2       16
#define TUXEDO_ATMI_PRE_NW_ACALL2_RPLY  17
#define TUXEDO_ATMI_PRE_NW_ACALL3       18
#define TUXEDO_ATMI_PRE_NW_ACALL3_RPLY  19
#define TUXEDO_ATMI_PRE_NW_LLE          20
#define TUXEDO_ATMI_PRE_NW_LLE_RPLY     21
#define TUXEDO_ATMI_SEC_EXCHG_RQST      22
#define TUXEDO_ATMI_SEC_EXCHG_RPLY      23
#define TUXEDO_ATMI_SEC_NW_ACALL3       24
#define TUXEDO_ATMI_SEC_NW_ACALL3_RPLY  25


static const value_string tuxedo_opcode_vals[] = {
	{ TUXEDO_ATMI_CALL,                 "CALL" },
	{ TUXEDO_ATMI_REPLY,                "REPLY" },
	{ TUXEDO_ATMI_FAILURE,              "FAILURE" },
	{ TUXEDO_ATMI_CONNECT,              "CONNECT" },
	{ TUXEDO_ATMI_DATA,                 "DATA" },
	{ TUXEDO_ATMI_DISCON,               "DISCON" },
	{ TUXEDO_ATMI_PREPARE,              "PREPARE" },
	{ TUXEDO_ATMI_READY,                "READY" },
	{ TUXEDO_ATMI_COMMIT,               "COMMIT" },
	{ TUXEDO_ATMI_DONE,                 "DONE" },
	{ TUXEDO_ATMI_COMPLETE,             "COMPLETE" },
	{ TUXEDO_ATMI_ROLLBACK,             "ROLLBACK" },
	{ TUXEDO_ATMI_HEURISTIC,            "HEURISTIC" },
	{ TUXEDO_ATMI_PRE_NW_ACALL1,        "ACALL1" },
	{ TUXEDO_ATMI_PRE_NW_ACALL1_RPLY,   "ACALL1_REPLY" },
	{ TUXEDO_ATMI_PRE_NW_ACALL2,        "ACALL2" },
	{ TUXEDO_ATMI_PRE_NW_ACALL2_RPLY,   "ACALL2_REPLY" },
	{ TUXEDO_ATMI_PRE_NW_ACALL3,        "ACALL3" },
	{ TUXEDO_ATMI_PRE_NW_ACALL3_RPLY,   "ACALL3_REPLY" },
	{ TUXEDO_ATMI_PRE_NW_LLE,           "LLE" },
	{ TUXEDO_ATMI_PRE_NW_LLE_RPLY,      "LLE_REPLY" },
	{ TUXEDO_ATMI_SEC_EXCHG_RQST,       "SEC_EXCHANGE" },
	{ TUXEDO_ATMI_SEC_EXCHG_RPLY,       "SEC_EXCHANGE_REPLY" },
	{ TUXEDO_ATMI_SEC_NW_ACALL3,        "SEC_ACALL3" },
	{ TUXEDO_ATMI_SEC_NW_ACALL3_RPLY,   "SEC_ACALL3_REPLY" },
	{ 0,          NULL }
};


static int
dissect_tuxedo(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
{
	proto_tree	*tuxedoroot_tree = NULL;
	proto_item	*ti;
	uint32_t magic;
	uint32_t opcode;

	col_set_str(pinfo->cinfo, COL_PROTOCOL, "TUXEDO");

	if (tvb_reported_length(tvb) >= 8)
	{
		magic = tvb_get_ntohl(tvb, 0);
		if (magic == TUXEDO_MAGIC || magic == TUXEDO_SMAGIC)
		{
			opcode = tvb_get_ntohl(tvb, 4);

			col_add_str(pinfo->cinfo, COL_INFO, val_to_str(opcode, tuxedo_opcode_vals, "Unknown (0x%02x)"));

			if (tree)
			{
				ti = proto_tree_add_item(tree, proto_tuxedo, tvb, 0, -1, ENC_NA);
				tuxedoroot_tree = proto_item_add_subtree(ti, ett_tuxedo);

				proto_tree_add_item(tuxedoroot_tree, hf_tuxedo_magic, tvb, 0, 4, ENC_BIG_ENDIAN);
				proto_tree_add_item(tuxedoroot_tree, hf_tuxedo_opcode, tvb, 4, 4, ENC_BIG_ENDIAN);
			}
		}
		else
		{
			/* This packet is a continuation */
			col_set_str(pinfo->cinfo, COL_INFO, "Continuation");
			if (tree)
			{
				proto_tree_add_item(tree, proto_tuxedo, tvb, 0, -1, ENC_NA);
			}
		}
	}
	return tvb_captured_length(tvb);
}

static bool
dissect_tuxedo_heur(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data)
{
	if (tvb_captured_length(tvb) >= 8)
	{
		uint32_t magic;
		magic = tvb_get_ntohl(tvb, 0);
		if (magic == TUXEDO_MAGIC || magic == TUXEDO_SMAGIC)
		{
			/* Register this dissector for this conversation */
			conversation_t  *conversation = NULL;
			conversation = find_or_create_conversation(pinfo);
			conversation_set_dissector(conversation, tuxedo_handle);

			dissect_tuxedo(tvb, pinfo, tree, data);
			return true;
		}
	}
	return false;
}

void
proto_register_tuxedo(void)
{
	static hf_register_info hf[] = {
		{ &hf_tuxedo_magic,
		  { "Magic", "tuxedo.magic", FT_UINT32, BASE_HEX, NULL, 0x0, "TUXEDO magic", HFILL }},

		{ &hf_tuxedo_opcode,
		  { "Opcode", "tuxedo.opcode", FT_UINT32, BASE_HEX, VALS(tuxedo_opcode_vals), 0x0, "TUXEDO opcode", HFILL }}

	};
	static int *ett[] = {
		&ett_tuxedo,
	};

	proto_tuxedo = proto_register_protocol("BEA Tuxedo", "TUXEDO", "tuxedo");
	proto_register_field_array(proto_tuxedo, hf, array_length(hf));
	proto_register_subtree_array(ett, array_length(ett));

	tuxedo_handle = register_dissector("tuxedo", dissect_tuxedo, proto_tuxedo);
}

void
proto_reg_handoff_tuxedo(void)
{
	dissector_add_for_decode_as_with_preference("tcp.port", tuxedo_handle);
	heur_dissector_add("tcp", dissect_tuxedo_heur, "Tuxedo over TCP", "tuxedo_tcp", proto_tuxedo, HEURISTIC_ENABLE);
}

/*
 * Editor modelines  -  https://www.wireshark.org/tools/modelines.html
 *
 * Local variables:
 * c-basic-offset: 8
 * tab-width: 8
 * indent-tabs-mode: t
 * End:
 *
 * vi: set shiftwidth=8 tabstop=8 noexpandtab:
 * :indentSize=8:tabSize=8:noTabs=false:
 */