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/* packet-artemis.c
* Dissector of ActiveMQ Artemis Core Protocol, so far just the message headers
* Implemented: 2017, Pavel Moravec, Red Hat <pmoravec@redhat.com>
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* SPDX-License-Identifier: GPL-2.0-or-later
*
* Protocol information:
* https://github.com/apache/activemq-artemis/blob/master/artemis-core-client/src/main/java/org/apache/activemq/artemis/core/protocol/core/impl/PacketImpl.java#L309-L326
*/
#include "config.h"
#include <epan/packet.h>
#include <epan/expert.h>
#include "packet-tcp.h"
#include "stdio.h"
#define ARTEMIS_PORT 5445 /* Not IANA registered */
static int proto_artemis = -1;
/* handles */
static int hf_artemis_len = -1;
static int hf_artemis_type = -1;
static int hf_artemis_channel = -1;
static int hf_artemis_buffer = -1;
static gint ett_artemis = -1;
static expert_field ei_artemis_len_short = EI_INIT;
static dissector_handle_t artemis_tcp_handle = NULL;
void proto_register_artemis(void);
void proto_reg_handoff_artemis(void);
static int dissect_artemis(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree _U_, void *data _U_);
static guint
get_artemis_message_len(packet_info *pinfo _U_, tvbuff_t *tvb,
int offset, void *data _U_)
{
/* The 4bytes length doesn't include the actual length byte, that's why the "+4" */
return (guint) tvb_get_ntohl(tvb, offset) + 4;
}
static int
dissect_artemis_frame(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
{
proto_item *ti, *len_item;
proto_tree *artemis_tree;
guint32 length;
ti = proto_tree_add_item(tree, proto_artemis, tvb, 0, -1, ENC_NA);
artemis_tree = proto_item_add_subtree(ti, ett_artemis);
len_item = proto_tree_add_item_ret_uint(artemis_tree, hf_artemis_len, tvb, 0, 4, ENC_BIG_ENDIAN, &length);
if (length < 9) { /* 9 = 1(type) + channel(8), if length is smaller, we cant read even type+channel */
expert_add_info(pinfo, len_item, &ei_artemis_len_short);
return tvb_captured_length(tvb);
}
proto_tree_add_item(artemis_tree, hf_artemis_type, tvb, 4, 1, ENC_BIG_ENDIAN);
proto_tree_add_item(artemis_tree, hf_artemis_channel, tvb, 5, 8, ENC_BIG_ENDIAN);
proto_tree_add_item(artemis_tree, hf_artemis_buffer, tvb, 13, length-9, ENC_NA);
return tvb_captured_length(tvb);
}
static int
dissect_artemis(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree _U_, void *data _U_)
{
col_set_str(pinfo->cinfo, COL_PROTOCOL, "ARTEMIS");
/* Clear out stuff in the info column */
col_clear(pinfo->cinfo, COL_INFO);
/* fixed_len = 4(len) + 1(type) + 8(channel) */
tcp_dissect_pdus(tvb, pinfo, tree, TRUE, 4, get_artemis_message_len,
dissect_artemis_frame, data);
return tvb_captured_length(tvb);
}
void
proto_register_artemis(void)
{
static hf_register_info hf[] = {
{&hf_artemis_len, {
"Length", "artemis.length",
FT_UINT32, BASE_DEC, NULL, 0x0,
"Length of the frame", HFILL}},
{&hf_artemis_type, {
"Type", "artemis.type",
FT_UINT8, BASE_DEC, NULL, 0x0,
"Type of the frame", HFILL}},
{&hf_artemis_channel, {
"Channel", "artemis.channel",
FT_UINT64, BASE_DEC, NULL, 0x0,
"Channel ID of the frame", HFILL}},
{&hf_artemis_buffer, {
"Buffer", "artemis.buffer",
FT_BYTES, BASE_NONE, NULL, 0,
"Binary buffer", HFILL}}
};
static gint *ett [] = {
&ett_artemis
};
static ei_register_info ei[] = {
{ &ei_artemis_len_short, { "artemis.len_short", PI_PROTOCOL, PI_ERROR, "Frame length is too short", EXPFILL }}
};
expert_module_t* expert_artemis;
proto_artemis = proto_register_protocol ( "Artemis Core Protocol", "Artemis", "artemis" );
artemis_tcp_handle = register_dissector("artemis", dissect_artemis, proto_artemis);
proto_register_field_array(proto_artemis, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
expert_artemis = expert_register_protocol(proto_artemis);
expert_register_field_array(expert_artemis, ei, array_length(ei));
}
void
proto_reg_handoff_artemis(void)
{
static gboolean initialize = FALSE;
if (!initialize) {
/* Register TCP port for dissection */
dissector_add_uint_with_preference("tcp.port", ARTEMIS_PORT, artemis_tcp_handle);
initialize = TRUE;
}
}
/*
* Editor modelines - https://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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