2014-04-06 20:31:53 +00:00
|
|
|
/* packet-mqtt.c
|
|
|
|
* Routines for MQTT Protocol dissection
|
|
|
|
*
|
|
|
|
* By Lakshmi Narayana Madala <madalanarayana@outlook.com>
|
2016-09-08 19:26:12 +00:00
|
|
|
* Stig Bjorlykke <stig@bjorlykke.org>
|
2014-04-06 20:31:53 +00:00
|
|
|
*
|
|
|
|
* 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.
|
|
|
|
*/
|
|
|
|
|
2017-10-15 06:33:56 +00:00
|
|
|
/*
|
|
|
|
* Protocol description:
|
|
|
|
*
|
|
|
|
* MQTT is a Client Server publish/subscribe messaging transport
|
|
|
|
* protocol. The protocol runs over TCP/IP, or over other network
|
|
|
|
* protocols that provide ordered, lossless, bi-directional
|
|
|
|
* connections.
|
|
|
|
*
|
|
|
|
* MQTT v3.1 specification:
|
|
|
|
* http://public.dhe.ibm.com/software/dw/webservices/ws-mqtt/mqtt-v3r1.html
|
|
|
|
*
|
|
|
|
* MQTT v3.1.1 specification:
|
|
|
|
* http://docs.oasis-open.org/mqtt/mqtt/v3.1.1/
|
2017-11-04 12:25:45 +00:00
|
|
|
*
|
|
|
|
* MQTT v5.0 specification:
|
|
|
|
* http://docs.oasis-open.org/mqtt/mqtt/v5.0/
|
|
|
|
*
|
2017-10-15 06:33:56 +00:00
|
|
|
*/
|
|
|
|
|
2014-04-06 20:31:53 +00:00
|
|
|
#include "config.h"
|
|
|
|
#include <epan/packet.h>
|
2017-10-31 10:28:05 +00:00
|
|
|
#include <epan/strutil.h>
|
|
|
|
#include <epan/uat.h>
|
2014-04-06 20:31:53 +00:00
|
|
|
#include <epan/dwarf.h>
|
|
|
|
#include "packet-tcp.h"
|
2016-03-24 20:47:04 +00:00
|
|
|
#include "packet-ssl.h"
|
|
|
|
|
|
|
|
#define MQTT_DEFAULT_PORT 1883 /* IANA registered under service name as mqtt */
|
|
|
|
#define MQTT_SSL_DEFAULT_PORT 8883 /* IANA registered under service name secure-mqtt */
|
2014-04-06 20:31:53 +00:00
|
|
|
|
2017-10-16 05:11:48 +00:00
|
|
|
/* MQTT Protocol Versions */
|
|
|
|
#define MQTT_PROTO_V31 3
|
|
|
|
#define MQTT_PROTO_V311 4
|
2017-11-04 12:25:45 +00:00
|
|
|
#define MQTT_PROTO_V50 5
|
2017-10-16 05:11:48 +00:00
|
|
|
|
2014-04-06 20:31:53 +00:00
|
|
|
#define MQTT_HDR_SIZE_BEFORE_LEN 1
|
|
|
|
|
2017-10-15 09:15:13 +00:00
|
|
|
/* MQTT Message Types */
|
2014-04-23 17:15:26 +00:00
|
|
|
#define MQTT_RESERVED 0
|
|
|
|
#define MQTT_CONNECT 1
|
|
|
|
#define MQTT_CONNACK 2
|
|
|
|
#define MQTT_PUBLISH 3
|
|
|
|
#define MQTT_PUBACK 4
|
|
|
|
#define MQTT_PUBREC 5
|
|
|
|
#define MQTT_PUBREL 6
|
|
|
|
#define MQTT_PUBCOMP 7
|
|
|
|
#define MQTT_SUBSCRIBE 8
|
|
|
|
#define MQTT_SUBACK 9
|
2014-04-06 20:31:53 +00:00
|
|
|
#define MQTT_UNSUBSCRIBE 10
|
|
|
|
#define MQTT_UNSUBACK 11
|
|
|
|
#define MQTT_PINGREQ 12
|
|
|
|
#define MQTT_PINGRESP 13
|
|
|
|
#define MQTT_DISCONNECT 14
|
2017-11-04 12:25:45 +00:00
|
|
|
#define MQTT_AUTH 15
|
|
|
|
#define MQTT_RESERVED_16 16
|
2014-04-06 20:31:53 +00:00
|
|
|
|
|
|
|
/* Flag Values to extract fields */
|
2017-10-15 10:18:38 +00:00
|
|
|
#define MQTT_MASK_MSG_TYPE 0xF0
|
|
|
|
#define MQTT_MASK_HDR_RESERVED 0x0F
|
|
|
|
#define MQTT_MASK_HDR_DUP_RESERVED 0x07
|
|
|
|
#define MQTT_MASK_QOS 0x06
|
|
|
|
#define MQTT_MASK_DUP_FLAG 0x08
|
|
|
|
#define MQTT_MASK_RETAIN 0x01
|
2014-04-06 20:31:53 +00:00
|
|
|
|
2014-04-14 12:47:30 +00:00
|
|
|
void proto_register_mqtt(void);
|
|
|
|
void proto_reg_handoff_mqtt(void);
|
|
|
|
|
2017-10-16 05:11:48 +00:00
|
|
|
static const value_string mqtt_protocol_version_vals[] = {
|
|
|
|
{ MQTT_PROTO_V31, "MQTT v3.1" },
|
|
|
|
{ MQTT_PROTO_V311, "MQTT v3.1.1" },
|
2017-11-04 12:25:45 +00:00
|
|
|
{ MQTT_PROTO_V50, "MQTT v5.0" },
|
2017-10-16 05:11:48 +00:00
|
|
|
{ 0, NULL }
|
|
|
|
};
|
|
|
|
|
2014-04-06 20:31:53 +00:00
|
|
|
static const value_string mqtt_msgtype_vals[] = {
|
|
|
|
{ MQTT_RESERVED, "Reserved" },
|
|
|
|
{ MQTT_CONNECT, "Connect Command" },
|
|
|
|
{ MQTT_CONNACK, "Connect Ack" },
|
|
|
|
{ MQTT_PUBLISH, "Publish Message" },
|
|
|
|
{ MQTT_PUBACK, "Publish Ack" },
|
|
|
|
{ MQTT_PUBREC, "Publish Received" },
|
|
|
|
{ MQTT_PUBREL, "Publish Release" },
|
|
|
|
{ MQTT_PUBCOMP, "Publish Complete" },
|
|
|
|
{ MQTT_SUBSCRIBE, "Subscribe Request" },
|
|
|
|
{ MQTT_SUBACK, "Subscribe Ack" },
|
|
|
|
{ MQTT_UNSUBSCRIBE, "Unsubscribe Request" },
|
|
|
|
{ MQTT_UNSUBACK, "Unsubscribe Ack" },
|
|
|
|
{ MQTT_PINGREQ, "Ping Request" },
|
|
|
|
{ MQTT_PINGRESP, "Ping Response" },
|
|
|
|
{ MQTT_DISCONNECT, "Disconnect Req" },
|
2017-11-04 12:25:45 +00:00
|
|
|
{ MQTT_AUTH, "Authentication Exchange" },
|
|
|
|
{ MQTT_RESERVED_16, "Reserved" },
|
2014-04-06 20:31:53 +00:00
|
|
|
{ 0, NULL }
|
|
|
|
};
|
2014-04-23 17:15:26 +00:00
|
|
|
static value_string_ext mqtt_msgtype_vals_ext = VALUE_STRING_EXT_INIT(mqtt_msgtype_vals);
|
2014-04-06 20:31:53 +00:00
|
|
|
|
|
|
|
#define MQTT_QOS_ATMOST_ONCE 0
|
|
|
|
#define MQTT_QOS_ATLEAST_ONCE 1
|
|
|
|
#define MQTT_QOS_EXACTLY_ONCE 2
|
|
|
|
#define MQTT_QOS_RESERVED 3
|
|
|
|
|
|
|
|
static const value_string mqtt_qos_vals[] = {
|
2016-09-08 19:26:12 +00:00
|
|
|
{ MQTT_QOS_ATMOST_ONCE, "At most once delivery (Fire and Forget)" },
|
|
|
|
{ MQTT_QOS_ATLEAST_ONCE, "At least once delivery (Acknowledged deliver)" },
|
|
|
|
{ MQTT_QOS_EXACTLY_ONCE, "Exactly once delivery (Assured Delivery)" },
|
2014-04-06 20:31:53 +00:00
|
|
|
{ MQTT_QOS_RESERVED, "Reserved" },
|
|
|
|
{ 0, NULL }
|
|
|
|
};
|
|
|
|
|
2016-09-08 19:26:12 +00:00
|
|
|
#define MQTT_SUBACK_FAILURE 128
|
|
|
|
|
|
|
|
static const value_string mqtt_subqos_vals[] = {
|
2016-09-11 18:21:10 +00:00
|
|
|
{ MQTT_QOS_ATMOST_ONCE, "At most once delivery (Fire and Forget)" },
|
|
|
|
{ MQTT_QOS_ATLEAST_ONCE, "At least once delivery (Acknowledged deliver)" },
|
|
|
|
{ MQTT_QOS_EXACTLY_ONCE, "Exactly once delivery (Assured Delivery)" },
|
|
|
|
{ MQTT_QOS_RESERVED, "Reserved" },
|
|
|
|
{ MQTT_SUBACK_FAILURE, "Failure" },
|
|
|
|
{ 0, NULL }
|
2016-09-08 19:26:12 +00:00
|
|
|
};
|
|
|
|
|
2014-04-06 20:31:53 +00:00
|
|
|
#define MQTT_CON_ACCEPTED 0
|
|
|
|
#define MQTT_CON_REFUSED_VERSION_MISMATCH 1
|
|
|
|
#define MQTT_CON_REFUSED_ID_REJECTED 2
|
|
|
|
#define MQTT_CON_REFUSED_SERVER_UNAVAILABLE 3
|
|
|
|
#define MQTT_CON_REFUSED_BAD_USER_PASSWD 4
|
|
|
|
#define MQTT_CON_REFUSED_UNAUTHORIZED 5
|
|
|
|
|
|
|
|
static const value_string mqtt_conack_vals[] = {
|
|
|
|
{ MQTT_CON_ACCEPTED, "Connection Accepted" },
|
|
|
|
{ MQTT_CON_REFUSED_VERSION_MISMATCH, "Connection Refused: unacceptable protocol version" },
|
|
|
|
{ MQTT_CON_REFUSED_ID_REJECTED, "Connection Refused: identifier rejected" },
|
|
|
|
{ MQTT_CON_REFUSED_SERVER_UNAVAILABLE, "Connection Refused: server unavailable" },
|
|
|
|
{ MQTT_CON_REFUSED_BAD_USER_PASSWD, "Connection Refused: bad user name or password" },
|
|
|
|
{ MQTT_CON_REFUSED_UNAUTHORIZED, "Connection Refused: not authorized" },
|
|
|
|
{ 0, NULL }
|
|
|
|
};
|
|
|
|
|
|
|
|
#define MQTT_CONMASK_USER 0x80
|
|
|
|
#define MQTT_CONMASK_PASSWD 0x40
|
|
|
|
#define MQTT_CONMASK_RETAIN 0x20
|
|
|
|
#define MQTT_CONMASK_QOS 0x18
|
|
|
|
#define MQTT_CONMASK_WILLFLAG 0x04
|
|
|
|
#define MQTT_CONMASK_CLEANSESS 0x02
|
2014-04-23 17:15:26 +00:00
|
|
|
#define MQTT_CONMASK_RESERVED 0x01
|
2014-04-06 20:31:53 +00:00
|
|
|
|
2016-09-08 19:26:12 +00:00
|
|
|
#define MQTT_CONACKMASK_RESERVED 0xFE
|
|
|
|
#define MQTT_CONACKMASK_SP 0x01
|
|
|
|
|
2017-10-15 10:18:38 +00:00
|
|
|
/* The protocol version is present in the CONNECT message. */
|
|
|
|
typedef struct {
|
|
|
|
guint8 runtime_proto_version;
|
|
|
|
} mqtt_conv;
|
|
|
|
|
2017-10-31 10:28:05 +00:00
|
|
|
typedef struct _mqtt_message_decode_t {
|
|
|
|
guint match_criteria;
|
|
|
|
char *topic_pattern;
|
|
|
|
GRegex *topic_regex;
|
|
|
|
char *payload_proto_name;
|
|
|
|
dissector_handle_t payload_proto;
|
|
|
|
} mqtt_message_decode_t;
|
|
|
|
|
|
|
|
#define MATCH_CRITERIA_EQUAL 0
|
|
|
|
#define MATCH_CRITERIA_CONTAINS 1
|
|
|
|
#define MATCH_CRITERIA_STARTS_WITH 2
|
|
|
|
#define MATCH_CRITERIA_ENDS_WITH 3
|
|
|
|
#define MATCH_CRITERIA_REGEX 4
|
|
|
|
|
|
|
|
static const value_string match_criteria[] = {
|
|
|
|
{ MATCH_CRITERIA_EQUAL, "Equal to" },
|
|
|
|
{ MATCH_CRITERIA_CONTAINS, "Contains" },
|
|
|
|
{ MATCH_CRITERIA_STARTS_WITH, "Starts with" },
|
|
|
|
{ MATCH_CRITERIA_ENDS_WITH, "Ends with" },
|
|
|
|
{ MATCH_CRITERIA_REGEX, "Regular Expression" },
|
|
|
|
{ 0, NULL }
|
|
|
|
};
|
|
|
|
|
|
|
|
static mqtt_message_decode_t *mqtt_message_decodes = NULL;
|
|
|
|
static guint num_mqtt_message_decodes = 0;
|
|
|
|
|
2014-04-06 20:31:53 +00:00
|
|
|
static dissector_handle_t mqtt_handle;
|
|
|
|
|
|
|
|
/* Initialize the protocol and registered fields */
|
|
|
|
static int proto_mqtt = -1;
|
|
|
|
|
|
|
|
/* Message */
|
|
|
|
static int hf_mqtt_hdrflags = -1;
|
|
|
|
static int hf_mqtt_msg_len = -1;
|
|
|
|
static int hf_mqtt_msg_type = -1;
|
2017-10-15 10:18:38 +00:00
|
|
|
static int hf_mqtt_reserved = -1;
|
2014-04-06 20:31:53 +00:00
|
|
|
static int hf_mqtt_dup_flag = -1;
|
|
|
|
static int hf_mqtt_qos_level = -1;
|
|
|
|
static int hf_mqtt_retain = -1;
|
2017-10-22 19:28:05 +00:00
|
|
|
static int hf_mqtt_retain_reserved = -1;
|
|
|
|
static int hf_mqtt_conack_reserved = -1;
|
2016-09-08 19:26:12 +00:00
|
|
|
static int hf_mqtt_conack_flags = -1;
|
|
|
|
static int hf_mqtt_conackflag_reserved = -1;
|
|
|
|
static int hf_mqtt_conackflag_sp = -1;
|
|
|
|
static int hf_mqtt_conack_code = -1;
|
2014-04-06 20:31:53 +00:00
|
|
|
static int hf_mqtt_msgid = -1;
|
2016-09-08 19:26:12 +00:00
|
|
|
static int hf_mqtt_sub_qos = -1;
|
|
|
|
static int hf_mqtt_suback_qos = -1;
|
|
|
|
static int hf_mqtt_topic_len = -1;
|
2014-04-06 20:31:53 +00:00
|
|
|
static int hf_mqtt_topic = -1;
|
2016-09-08 19:26:12 +00:00
|
|
|
static int hf_mqtt_will_topic_len = -1;
|
2014-04-06 20:31:53 +00:00
|
|
|
static int hf_mqtt_will_topic = -1;
|
2016-09-08 19:26:12 +00:00
|
|
|
static int hf_mqtt_will_msg_len = -1;
|
2014-04-06 20:31:53 +00:00
|
|
|
static int hf_mqtt_will_msg = -1;
|
2016-09-08 19:26:12 +00:00
|
|
|
static int hf_mqtt_username_len = -1;
|
2014-04-06 20:31:53 +00:00
|
|
|
static int hf_mqtt_username = -1;
|
2016-09-08 19:26:12 +00:00
|
|
|
static int hf_mqtt_passwd_len = -1;
|
2014-04-06 20:31:53 +00:00
|
|
|
static int hf_mqtt_passwd = -1;
|
|
|
|
static int hf_mqtt_pubmsg = -1;
|
2017-10-31 10:28:05 +00:00
|
|
|
static int hf_mqtt_pubmsg_decoded = -1;
|
2016-09-08 19:26:12 +00:00
|
|
|
static int hf_mqtt_proto_len = -1;
|
2014-04-06 20:31:53 +00:00
|
|
|
static int hf_mqtt_proto_name = -1;
|
2016-09-08 19:26:12 +00:00
|
|
|
static int hf_mqtt_client_id_len = -1;
|
2014-04-06 20:31:53 +00:00
|
|
|
static int hf_mqtt_client_id = -1;
|
|
|
|
static int hf_mqtt_proto_ver = -1;
|
|
|
|
static int hf_mqtt_conflags = -1;
|
|
|
|
static int hf_mqtt_conflag_user = -1;
|
|
|
|
static int hf_mqtt_conflag_passwd = -1;
|
|
|
|
static int hf_mqtt_conflag_will_retain = -1;
|
|
|
|
static int hf_mqtt_conflag_will_qos = -1;
|
|
|
|
static int hf_mqtt_conflag_will_flag = -1;
|
|
|
|
static int hf_mqtt_conflag_clean_sess = -1;
|
2014-04-23 17:15:26 +00:00
|
|
|
static int hf_mqtt_conflag_reserved = -1;
|
2014-04-06 20:31:53 +00:00
|
|
|
static int hf_mqtt_keep_alive = -1;
|
2017-11-04 12:25:45 +00:00
|
|
|
static int hf_mqtt_subscription_options = -1;
|
|
|
|
static int hf_mqtt_reason_code = -1;
|
|
|
|
static int hf_mqtt_property_len = -1;
|
|
|
|
static int hf_mqtt_property = -1;
|
2014-04-06 20:31:53 +00:00
|
|
|
|
|
|
|
/* Initialize the subtree pointers */
|
|
|
|
static gint ett_mqtt_hdr = -1;
|
|
|
|
static gint ett_mqtt_msg = -1;
|
|
|
|
static gint ett_mqtt_hdr_flags = -1;
|
|
|
|
static gint ett_mqtt_con_flags = -1;
|
2016-09-08 19:26:12 +00:00
|
|
|
static gint ett_mqtt_conack_flags = -1;
|
2014-04-06 20:31:53 +00:00
|
|
|
|
|
|
|
/* Reassemble SMPP TCP segments */
|
|
|
|
static gboolean reassemble_mqtt_over_tcp = TRUE;
|
|
|
|
|
|
|
|
#define GET_MQTT_PDU_LEN(msg_len, len_offset) (msg_len + len_offset + MQTT_HDR_SIZE_BEFORE_LEN)
|
|
|
|
|
2015-01-25 19:30:13 +00:00
|
|
|
static guint get_mqtt_pdu_len(packet_info *pinfo _U_, tvbuff_t *tvb,
|
|
|
|
int offset, void *data _U_)
|
2014-04-06 20:31:53 +00:00
|
|
|
{
|
|
|
|
guint64 msg_len;
|
|
|
|
guint len_offset;
|
|
|
|
|
|
|
|
len_offset = dissect_uleb128(tvb, (offset + MQTT_HDR_SIZE_BEFORE_LEN), &msg_len);
|
|
|
|
|
2017-10-15 09:15:13 +00:00
|
|
|
/* Explicitly downcast the value, because the length can never be more than 4 bytes */
|
2014-04-06 20:31:53 +00:00
|
|
|
return (guint)(GET_MQTT_PDU_LEN(msg_len, len_offset));
|
|
|
|
}
|
|
|
|
|
2017-10-31 10:28:05 +00:00
|
|
|
static void *mqtt_message_decode_copy_cb(void *dest, const void *orig, size_t len _U_)
|
|
|
|
{
|
|
|
|
const mqtt_message_decode_t *o = (const mqtt_message_decode_t *)orig;
|
|
|
|
mqtt_message_decode_t *d = (mqtt_message_decode_t *)dest;
|
|
|
|
|
|
|
|
d->topic_pattern = g_strdup(o->topic_pattern);
|
|
|
|
d->payload_proto_name = g_strdup(o->payload_proto_name);
|
|
|
|
|
|
|
|
return d;
|
|
|
|
}
|
|
|
|
|
|
|
|
static gboolean mqtt_message_decode_update_cb(void *record, char **error)
|
|
|
|
{
|
|
|
|
mqtt_message_decode_t *u = (mqtt_message_decode_t *)record;
|
|
|
|
|
|
|
|
if (u->topic_pattern == NULL || strlen(u->topic_pattern) == 0)
|
|
|
|
{
|
|
|
|
*error = g_strdup("Missing topic pattern");
|
|
|
|
return FALSE;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (u->match_criteria == MATCH_CRITERIA_REGEX)
|
|
|
|
{
|
|
|
|
u->topic_regex = g_regex_new(u->topic_pattern, (GRegexCompileFlags) G_REGEX_OPTIMIZE, (GRegexMatchFlags) 0, NULL);
|
|
|
|
if (!u->topic_regex)
|
|
|
|
{
|
|
|
|
*error = g_strdup_printf("Invalid regex: %s", u->topic_pattern);
|
|
|
|
return FALSE;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
return TRUE;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void mqtt_message_decode_free_cb(void *record)
|
|
|
|
{
|
|
|
|
mqtt_message_decode_t *u = (mqtt_message_decode_t *)record;
|
|
|
|
|
|
|
|
g_free(u->topic_pattern);
|
|
|
|
if (u->topic_regex)
|
|
|
|
{
|
|
|
|
g_regex_unref(u->topic_regex);
|
|
|
|
}
|
|
|
|
g_free(u->payload_proto_name);
|
|
|
|
}
|
|
|
|
|
|
|
|
UAT_VS_DEF(message_decode, match_criteria, mqtt_message_decode_t, guint, MATCH_CRITERIA_EQUAL, "Equal to")
|
|
|
|
UAT_CSTRING_CB_DEF(message_decode, topic_pattern, mqtt_message_decode_t)
|
|
|
|
UAT_PROTO_DEF(message_decode, payload_proto, payload_proto, payload_proto_name, mqtt_message_decode_t)
|
|
|
|
|
|
|
|
static void mqtt_user_decode_message(proto_tree *tree, proto_tree *mqtt_tree, packet_info *pinfo, const guint8 *topic_str, tvbuff_t *msg_tvb)
|
|
|
|
{
|
2017-11-02 11:42:37 +00:00
|
|
|
mqtt_message_decode_t *message_decode_entry = NULL;
|
2017-10-31 10:28:05 +00:00
|
|
|
size_t topic_str_len = strlen(topic_str);
|
|
|
|
size_t topic_pattern_len;
|
2017-11-02 11:42:37 +00:00
|
|
|
gboolean match_found = FALSE;
|
2017-10-31 10:28:05 +00:00
|
|
|
|
|
|
|
if (topic_str_len == 0)
|
|
|
|
{
|
|
|
|
/* No topic to match */
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
2017-11-02 11:42:37 +00:00
|
|
|
for (guint i = 0; i < num_mqtt_message_decodes && !match_found; i++)
|
2017-10-31 10:28:05 +00:00
|
|
|
{
|
2017-11-02 11:42:37 +00:00
|
|
|
message_decode_entry = &mqtt_message_decodes[i];
|
|
|
|
switch (message_decode_entry->match_criteria)
|
2017-10-31 10:28:05 +00:00
|
|
|
{
|
|
|
|
case MATCH_CRITERIA_EQUAL:
|
2017-11-02 11:42:37 +00:00
|
|
|
match_found = (strcmp(topic_str, message_decode_entry->topic_pattern) == 0);
|
2017-10-31 10:28:05 +00:00
|
|
|
break;
|
|
|
|
case MATCH_CRITERIA_CONTAINS:
|
2017-11-02 11:42:37 +00:00
|
|
|
match_found = (strstr(topic_str, message_decode_entry->topic_pattern) != NULL);
|
2017-10-31 10:28:05 +00:00
|
|
|
break;
|
|
|
|
case MATCH_CRITERIA_STARTS_WITH:
|
2017-11-02 11:42:37 +00:00
|
|
|
topic_pattern_len = strlen(message_decode_entry->topic_pattern);
|
|
|
|
match_found = ((topic_str_len >= topic_pattern_len) &&
|
|
|
|
(strncmp(topic_str, message_decode_entry->topic_pattern, topic_pattern_len) == 0));
|
2017-10-31 10:28:05 +00:00
|
|
|
break;
|
|
|
|
case MATCH_CRITERIA_ENDS_WITH:
|
2017-11-02 11:42:37 +00:00
|
|
|
topic_pattern_len = strlen(message_decode_entry->topic_pattern);
|
|
|
|
match_found = ((topic_str_len >= topic_pattern_len) &&
|
|
|
|
(strcmp(topic_str + (topic_str_len - topic_pattern_len), message_decode_entry->topic_pattern) == 0));
|
2017-10-31 10:28:05 +00:00
|
|
|
break;
|
|
|
|
case MATCH_CRITERIA_REGEX:
|
2017-11-02 11:42:37 +00:00
|
|
|
if (message_decode_entry->topic_regex)
|
2017-10-31 10:28:05 +00:00
|
|
|
{
|
|
|
|
GMatchInfo *match_info = NULL;
|
2017-11-02 11:42:37 +00:00
|
|
|
g_regex_match(message_decode_entry->topic_regex, topic_str, (GRegexMatchFlags) 0, &match_info);
|
|
|
|
match_found = g_match_info_matches(match_info);
|
2017-10-31 10:28:05 +00:00
|
|
|
g_match_info_free(match_info);
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
/* Unknown match criteria */
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2017-11-02 11:42:37 +00:00
|
|
|
if (match_found)
|
2017-10-31 10:28:05 +00:00
|
|
|
{
|
2017-11-02 11:42:37 +00:00
|
|
|
proto_item *ti = proto_tree_add_string(mqtt_tree, hf_mqtt_pubmsg_decoded, msg_tvb, 0, -1,
|
|
|
|
message_decode_entry->payload_proto_name);
|
2017-10-31 10:28:05 +00:00
|
|
|
PROTO_ITEM_SET_GENERATED(ti);
|
|
|
|
|
2017-11-02 11:42:37 +00:00
|
|
|
call_dissector(message_decode_entry->payload_proto, msg_tvb, pinfo, tree);
|
2017-10-31 10:28:05 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2017-11-04 12:25:45 +00:00
|
|
|
/* MQTT v5.0: dissect the MQTT properties */
|
|
|
|
static guint32 dissect_mqtt_properties(tvbuff_t *tvb, proto_tree *mqtt_tree, guint32 offset)
|
|
|
|
{
|
|
|
|
guint32 mqtt_prop_offset;
|
|
|
|
guint32 mqtt_prop_len;
|
|
|
|
guint64 prop_len;
|
|
|
|
|
|
|
|
mqtt_prop_offset = dissect_uleb128(tvb, offset, &prop_len);
|
|
|
|
mqtt_prop_len = (guint32)prop_len;
|
|
|
|
|
|
|
|
proto_tree_add_item(mqtt_tree, hf_mqtt_property_len, tvb, offset, mqtt_prop_offset, ENC_BIG_ENDIAN);
|
|
|
|
if (mqtt_prop_len > 0)
|
|
|
|
{
|
|
|
|
proto_tree_add_item(mqtt_tree, hf_mqtt_property, tvb, offset + mqtt_prop_offset, mqtt_prop_len, ENC_UTF_8|ENC_NA);
|
|
|
|
/* In this iteration we don't dissect the MQTT properties section */
|
|
|
|
}
|
|
|
|
|
|
|
|
return mqtt_prop_offset + mqtt_prop_len;
|
|
|
|
}
|
|
|
|
|
2014-04-06 20:31:53 +00:00
|
|
|
/* Dissect the MQTT message */
|
|
|
|
static int dissect_mqtt(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
|
|
|
|
{
|
2017-10-15 10:18:38 +00:00
|
|
|
guint8 mqtt_fixed_hdr;
|
|
|
|
guint8 mqtt_msg_type;
|
2014-04-23 17:15:26 +00:00
|
|
|
proto_item *ti;
|
2017-11-04 12:25:45 +00:00
|
|
|
int hf_version_selector;
|
2017-10-31 10:28:05 +00:00
|
|
|
const guint8 *topic_str;
|
2014-04-23 17:15:26 +00:00
|
|
|
|
|
|
|
proto_tree *mqtt_tree;
|
|
|
|
|
2017-10-22 15:35:12 +00:00
|
|
|
guint64 mqtt_con_flags;
|
2014-04-23 17:15:26 +00:00
|
|
|
guint64 msg_len = 0;
|
|
|
|
gint mqtt_msg_len = 0;
|
|
|
|
guint16 mqtt_str_len;
|
|
|
|
guint16 mqtt_len_offset;
|
2017-10-15 10:18:38 +00:00
|
|
|
conversation_t *conv;
|
|
|
|
mqtt_conv *mqtt;
|
|
|
|
|
2017-11-04 12:25:45 +00:00
|
|
|
guint32 offset = 0;
|
2017-10-22 15:35:12 +00:00
|
|
|
static const int *publish_fields[] = {
|
|
|
|
&hf_mqtt_msg_type,
|
|
|
|
&hf_mqtt_dup_flag,
|
|
|
|
&hf_mqtt_qos_level,
|
|
|
|
&hf_mqtt_retain,
|
|
|
|
NULL
|
|
|
|
};
|
|
|
|
static const int *v31_pubrel_sub_unsub_fields[] = {
|
|
|
|
&hf_mqtt_msg_type,
|
|
|
|
&hf_mqtt_dup_flag,
|
|
|
|
&hf_mqtt_qos_level,
|
|
|
|
&hf_mqtt_retain_reserved,
|
|
|
|
NULL
|
|
|
|
};
|
|
|
|
static const int *other_fields[] = {
|
|
|
|
&hf_mqtt_msg_type,
|
|
|
|
&hf_mqtt_reserved,
|
|
|
|
NULL
|
|
|
|
};
|
|
|
|
static const int *connect_flags[] = {
|
|
|
|
&hf_mqtt_conflag_user,
|
|
|
|
&hf_mqtt_conflag_passwd,
|
|
|
|
&hf_mqtt_conflag_will_retain,
|
|
|
|
&hf_mqtt_conflag_will_qos,
|
|
|
|
&hf_mqtt_conflag_will_flag,
|
|
|
|
&hf_mqtt_conflag_clean_sess,
|
|
|
|
&hf_mqtt_conflag_reserved,
|
|
|
|
NULL
|
|
|
|
};
|
|
|
|
static const int *connack_flags[] = {
|
|
|
|
&hf_mqtt_conackflag_reserved,
|
|
|
|
&hf_mqtt_conackflag_sp,
|
|
|
|
NULL
|
|
|
|
};
|
2017-10-15 10:18:38 +00:00
|
|
|
|
|
|
|
/* Extract the message ID */
|
|
|
|
mqtt_fixed_hdr = tvb_get_guint8(tvb, offset);
|
|
|
|
mqtt_msg_type = mqtt_fixed_hdr >> 4;
|
|
|
|
|
|
|
|
col_set_str(pinfo->cinfo, COL_PROTOCOL, "MQTT");
|
|
|
|
col_append_sep_str(pinfo->cinfo, COL_INFO, ", ", val_to_str_ext(mqtt_msg_type, &mqtt_msgtype_vals_ext, "Unknown (0x%02x)"));
|
2014-04-23 17:15:26 +00:00
|
|
|
|
2017-10-15 09:15:13 +00:00
|
|
|
/* Add the MQTT branch to the main tree */
|
2014-04-06 20:31:53 +00:00
|
|
|
ti = proto_tree_add_item(tree, proto_mqtt, tvb, 0, -1, ENC_NA);
|
|
|
|
mqtt_tree = proto_item_add_subtree(ti, ett_mqtt_hdr);
|
|
|
|
|
2017-10-15 10:18:38 +00:00
|
|
|
conv = find_or_create_conversation(pinfo);
|
|
|
|
mqtt = (mqtt_conv *)conversation_get_proto_data(conv, proto_mqtt);
|
|
|
|
if (mqtt == NULL)
|
|
|
|
{
|
2017-10-22 19:28:05 +00:00
|
|
|
mqtt = wmem_new0(wmem_file_scope(), mqtt_conv);
|
|
|
|
conversation_add_proto_data(conv, proto_mqtt, mqtt);
|
2017-10-15 10:18:38 +00:00
|
|
|
}
|
|
|
|
|
2014-04-06 20:31:53 +00:00
|
|
|
mqtt_len_offset = dissect_uleb128(tvb, (offset + MQTT_HDR_SIZE_BEFORE_LEN), &msg_len);
|
|
|
|
|
2017-10-15 09:15:13 +00:00
|
|
|
/* Explicit downcast, typically maximum length of message could be 4 bytes */
|
2014-04-06 20:31:53 +00:00
|
|
|
mqtt_msg_len = (gint) msg_len;
|
|
|
|
|
2017-10-15 09:15:13 +00:00
|
|
|
/* Add the type to the MQTT tree item */
|
2016-09-08 19:26:12 +00:00
|
|
|
proto_item_append_text(mqtt_tree, ", %s", val_to_str_ext(mqtt_msg_type, &mqtt_msgtype_vals_ext, "Unknown (0x%02x)"));
|
2014-04-06 20:31:53 +00:00
|
|
|
|
2017-10-22 19:28:05 +00:00
|
|
|
if (mqtt_msg_type == MQTT_PUBLISH)
|
|
|
|
{
|
2017-10-22 15:35:12 +00:00
|
|
|
proto_tree_add_bitmask(mqtt_tree, tvb, offset, hf_mqtt_hdrflags, ett_mqtt_hdr_flags, publish_fields, ENC_BIG_ENDIAN);
|
2017-10-22 19:28:05 +00:00
|
|
|
}
|
|
|
|
else if (mqtt->runtime_proto_version == MQTT_PROTO_V31 &&
|
|
|
|
(mqtt_msg_type == MQTT_PUBREL ||
|
|
|
|
mqtt_msg_type == MQTT_SUBSCRIBE ||
|
|
|
|
mqtt_msg_type == MQTT_UNSUBSCRIBE))
|
|
|
|
{
|
2017-10-22 15:35:12 +00:00
|
|
|
proto_tree_add_bitmask(mqtt_tree, tvb, offset, hf_mqtt_hdrflags, ett_mqtt_hdr_flags, v31_pubrel_sub_unsub_fields, ENC_BIG_ENDIAN);
|
2017-10-22 19:28:05 +00:00
|
|
|
}
|
|
|
|
else
|
|
|
|
{
|
2017-10-22 15:35:12 +00:00
|
|
|
proto_tree_add_bitmask(mqtt_tree, tvb, offset, hf_mqtt_hdrflags, ett_mqtt_hdr_flags, other_fields, ENC_BIG_ENDIAN);
|
2017-10-15 10:18:38 +00:00
|
|
|
}
|
|
|
|
|
2014-04-23 17:15:26 +00:00
|
|
|
offset += 1;
|
2014-04-06 20:31:53 +00:00
|
|
|
|
2017-10-15 09:15:13 +00:00
|
|
|
/* Add the MQTT message length */
|
2016-09-08 19:26:12 +00:00
|
|
|
proto_tree_add_uint64(mqtt_tree, hf_mqtt_msg_len, tvb, offset, mqtt_len_offset, msg_len);
|
|
|
|
offset += mqtt_len_offset;
|
2014-04-06 20:31:53 +00:00
|
|
|
|
|
|
|
switch(mqtt_msg_type)
|
|
|
|
{
|
|
|
|
case MQTT_CONNECT:
|
|
|
|
mqtt_str_len = tvb_get_ntohs(tvb, offset);
|
2016-09-08 19:26:12 +00:00
|
|
|
proto_tree_add_item(mqtt_tree, hf_mqtt_proto_len, tvb, offset, 2, ENC_BIG_ENDIAN);
|
2014-04-23 17:15:26 +00:00
|
|
|
offset += 2;
|
2014-04-06 20:31:53 +00:00
|
|
|
|
2016-09-08 19:26:12 +00:00
|
|
|
proto_tree_add_item(mqtt_tree, hf_mqtt_proto_name, tvb, offset, mqtt_str_len, ENC_UTF_8|ENC_NA);
|
2014-04-06 20:31:53 +00:00
|
|
|
offset += mqtt_str_len;
|
|
|
|
|
2017-10-15 10:18:38 +00:00
|
|
|
mqtt->runtime_proto_version = tvb_get_guint8(tvb, offset);
|
|
|
|
|
2016-09-08 19:26:12 +00:00
|
|
|
proto_tree_add_item(mqtt_tree, hf_mqtt_proto_ver, tvb, offset, 1, ENC_BIG_ENDIAN);
|
2014-04-23 17:15:26 +00:00
|
|
|
offset += 1;
|
2014-04-06 20:31:53 +00:00
|
|
|
|
2017-10-22 15:35:12 +00:00
|
|
|
|
|
|
|
proto_tree_add_bitmask_ret_uint64(mqtt_tree, tvb, offset, hf_mqtt_conflags,
|
|
|
|
ett_mqtt_con_flags, connect_flags, ENC_BIG_ENDIAN, &mqtt_con_flags);
|
2014-04-23 17:15:26 +00:00
|
|
|
offset += 1;
|
2014-04-06 20:31:53 +00:00
|
|
|
|
2016-09-08 19:26:12 +00:00
|
|
|
proto_tree_add_item(mqtt_tree, hf_mqtt_keep_alive, tvb, offset, 2, ENC_BIG_ENDIAN);
|
2014-04-23 17:15:26 +00:00
|
|
|
offset += 2;
|
2014-04-06 20:31:53 +00:00
|
|
|
|
2017-11-04 12:25:45 +00:00
|
|
|
if (mqtt->runtime_proto_version == MQTT_PROTO_V50)
|
|
|
|
{
|
|
|
|
offset += dissect_mqtt_properties(tvb, mqtt_tree, offset);
|
|
|
|
}
|
|
|
|
|
2014-04-06 20:31:53 +00:00
|
|
|
mqtt_str_len = tvb_get_ntohs(tvb, offset);
|
2016-09-08 19:26:12 +00:00
|
|
|
proto_tree_add_item(mqtt_tree, hf_mqtt_client_id_len, tvb, offset, 2, ENC_BIG_ENDIAN);
|
2014-04-23 17:15:26 +00:00
|
|
|
offset += 2;
|
2014-04-06 20:31:53 +00:00
|
|
|
|
2016-09-08 19:26:12 +00:00
|
|
|
proto_tree_add_item(mqtt_tree, hf_mqtt_client_id, tvb, offset, mqtt_str_len, ENC_UTF_8|ENC_NA);
|
2014-04-06 20:31:53 +00:00
|
|
|
offset += mqtt_str_len;
|
|
|
|
|
|
|
|
if(mqtt_con_flags & MQTT_CONMASK_WILLFLAG)
|
|
|
|
{
|
|
|
|
mqtt_str_len = tvb_get_ntohs(tvb, offset);
|
2016-09-08 19:26:12 +00:00
|
|
|
proto_tree_add_item(mqtt_tree, hf_mqtt_will_topic_len, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
|
|
offset += 2;
|
2014-04-06 20:31:53 +00:00
|
|
|
|
2016-09-08 19:26:12 +00:00
|
|
|
proto_tree_add_item(mqtt_tree, hf_mqtt_will_topic, tvb, offset, mqtt_str_len, ENC_UTF_8|ENC_NA);
|
2014-04-06 20:31:53 +00:00
|
|
|
offset += mqtt_str_len;
|
|
|
|
}
|
|
|
|
if(mqtt_con_flags & MQTT_CONMASK_WILLFLAG)
|
|
|
|
{
|
|
|
|
mqtt_str_len = tvb_get_ntohs(tvb, offset);
|
2016-09-08 19:26:12 +00:00
|
|
|
proto_tree_add_item(mqtt_tree, hf_mqtt_will_msg_len, tvb, offset, 2, ENC_BIG_ENDIAN);
|
2014-04-23 17:15:26 +00:00
|
|
|
offset += 2;
|
2014-04-06 20:31:53 +00:00
|
|
|
|
2016-09-08 19:26:12 +00:00
|
|
|
proto_tree_add_item(mqtt_tree, hf_mqtt_will_msg, tvb, offset, mqtt_str_len, ENC_UTF_8|ENC_NA);
|
2014-04-06 20:31:53 +00:00
|
|
|
offset += mqtt_str_len;
|
|
|
|
}
|
2016-09-08 19:26:12 +00:00
|
|
|
if((mqtt_con_flags & MQTT_CONMASK_USER) && (tvb_reported_length_remaining(tvb, offset) > 0))
|
2014-04-06 20:31:53 +00:00
|
|
|
{
|
|
|
|
mqtt_str_len = tvb_get_ntohs(tvb, offset);
|
2016-09-08 19:26:12 +00:00
|
|
|
proto_tree_add_item(mqtt_tree, hf_mqtt_username_len, tvb, offset, 2, ENC_BIG_ENDIAN);
|
2014-04-23 17:15:26 +00:00
|
|
|
offset += 2;
|
2014-04-06 20:31:53 +00:00
|
|
|
|
2016-09-08 19:26:12 +00:00
|
|
|
proto_tree_add_item(mqtt_tree, hf_mqtt_username, tvb, offset, mqtt_str_len, ENC_UTF_8|ENC_NA);
|
2014-04-06 20:31:53 +00:00
|
|
|
offset += mqtt_str_len;
|
|
|
|
}
|
|
|
|
if((mqtt_con_flags & MQTT_CONMASK_PASSWD) && (tvb_reported_length_remaining(tvb, offset) > 0))
|
|
|
|
{
|
|
|
|
mqtt_str_len = tvb_get_ntohs(tvb, offset);
|
2016-09-08 19:26:12 +00:00
|
|
|
proto_tree_add_item(mqtt_tree, hf_mqtt_passwd_len, tvb, offset, 2, ENC_BIG_ENDIAN);
|
2014-04-23 17:15:26 +00:00
|
|
|
offset += 2;
|
2014-04-06 20:31:53 +00:00
|
|
|
|
2016-09-08 19:26:12 +00:00
|
|
|
proto_tree_add_item(mqtt_tree, hf_mqtt_passwd, tvb, offset, mqtt_str_len, ENC_UTF_8|ENC_NA);
|
2014-04-06 20:31:53 +00:00
|
|
|
}
|
|
|
|
break;
|
|
|
|
|
|
|
|
case MQTT_CONNACK:
|
2017-10-22 19:28:05 +00:00
|
|
|
if (mqtt->runtime_proto_version == MQTT_PROTO_V31)
|
|
|
|
{
|
|
|
|
/* v3.1 Connection Ack only contains a reserved byte and the Return Code. */
|
|
|
|
proto_tree_add_item(mqtt_tree, hf_mqtt_conack_reserved, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
|
|
}
|
|
|
|
else
|
|
|
|
{
|
|
|
|
/* v3.1.1 Conn Ack contains the Conn Ack Flags and the Return Code. */
|
2017-10-22 15:35:12 +00:00
|
|
|
proto_tree_add_bitmask(mqtt_tree, tvb, offset, hf_mqtt_conack_flags,
|
|
|
|
ett_mqtt_conack_flags, connack_flags, ENC_BIG_ENDIAN);
|
2017-10-22 19:28:05 +00:00
|
|
|
}
|
2016-09-08 19:26:12 +00:00
|
|
|
offset += 1;
|
|
|
|
|
|
|
|
proto_tree_add_item(mqtt_tree, hf_mqtt_conack_code, tvb, offset, 1, ENC_BIG_ENDIAN);
|
2017-11-04 12:25:45 +00:00
|
|
|
offset += 1;
|
2014-04-06 20:31:53 +00:00
|
|
|
|
2017-11-04 12:25:45 +00:00
|
|
|
if (mqtt->runtime_proto_version == MQTT_PROTO_V50)
|
|
|
|
{
|
|
|
|
offset += dissect_mqtt_properties(tvb, mqtt_tree, offset);
|
|
|
|
}
|
|
|
|
break;
|
2014-04-06 20:31:53 +00:00
|
|
|
case MQTT_PUBLISH:
|
2017-10-15 09:15:13 +00:00
|
|
|
/* TopicName|MsgID|Message| */
|
2014-04-06 20:31:53 +00:00
|
|
|
mqtt_str_len = tvb_get_ntohs(tvb, offset);
|
2016-09-08 19:26:12 +00:00
|
|
|
proto_tree_add_item(mqtt_tree, hf_mqtt_topic_len, tvb, offset, 2, ENC_BIG_ENDIAN);
|
2014-04-23 17:15:26 +00:00
|
|
|
offset += 2;
|
2014-04-06 20:31:53 +00:00
|
|
|
mqtt_msg_len -= 2;
|
|
|
|
|
2017-10-31 10:28:05 +00:00
|
|
|
proto_tree_add_item_ret_string(mqtt_tree, hf_mqtt_topic, tvb, offset, mqtt_str_len, ENC_UTF_8|ENC_NA,
|
|
|
|
wmem_epan_scope(), &topic_str);
|
2014-04-06 20:31:53 +00:00
|
|
|
offset += mqtt_str_len;
|
|
|
|
mqtt_msg_len -= mqtt_str_len;
|
|
|
|
|
2017-10-15 09:15:13 +00:00
|
|
|
/* Message ID is included only when QoS > 0 */
|
2014-04-06 20:31:53 +00:00
|
|
|
if(mqtt_fixed_hdr & MQTT_MASK_QOS)
|
|
|
|
{
|
2016-09-08 19:26:12 +00:00
|
|
|
proto_tree_add_item(mqtt_tree, hf_mqtt_msgid, tvb, offset, 2, ENC_BIG_ENDIAN);
|
2014-04-23 17:15:26 +00:00
|
|
|
offset += 2;
|
2016-09-08 19:26:12 +00:00
|
|
|
mqtt_msg_len -= 2;
|
2014-04-06 20:31:53 +00:00
|
|
|
}
|
2017-11-04 12:25:45 +00:00
|
|
|
|
|
|
|
if (mqtt->runtime_proto_version == MQTT_PROTO_V50)
|
|
|
|
{
|
|
|
|
guint32 mqtt_prop_offset = dissect_mqtt_properties(tvb, mqtt_tree, offset);
|
|
|
|
offset += mqtt_prop_offset;
|
|
|
|
|
|
|
|
mqtt_msg_len -= mqtt_prop_offset;
|
|
|
|
}
|
|
|
|
|
2016-09-08 19:26:12 +00:00
|
|
|
proto_tree_add_item(mqtt_tree, hf_mqtt_pubmsg, tvb, offset, mqtt_msg_len, ENC_UTF_8|ENC_NA);
|
2017-10-31 10:28:05 +00:00
|
|
|
|
|
|
|
if (num_mqtt_message_decodes > 0)
|
|
|
|
{
|
|
|
|
tvbuff_t *msg_tvb = tvb_new_subset_length(tvb, offset, mqtt_msg_len);
|
|
|
|
mqtt_user_decode_message(tree, mqtt_tree, pinfo, topic_str, msg_tvb);
|
|
|
|
}
|
2014-04-06 20:31:53 +00:00
|
|
|
break;
|
|
|
|
|
|
|
|
case MQTT_SUBSCRIBE:
|
2017-10-15 09:15:13 +00:00
|
|
|
/* After the Message Id field is found, the following fields must appear
|
|
|
|
* at least once:
|
|
|
|
* |TopicName|QoS|
|
2014-04-06 20:31:53 +00:00
|
|
|
*/
|
2016-09-08 19:26:12 +00:00
|
|
|
proto_tree_add_item(mqtt_tree, hf_mqtt_msgid, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
|
|
offset += 2;
|
2017-11-04 12:25:45 +00:00
|
|
|
|
|
|
|
if (mqtt->runtime_proto_version == MQTT_PROTO_V50)
|
|
|
|
{
|
|
|
|
offset += dissect_mqtt_properties(tvb, mqtt_tree, offset);
|
|
|
|
hf_version_selector = hf_mqtt_subscription_options;
|
|
|
|
}
|
|
|
|
else
|
|
|
|
{
|
|
|
|
hf_version_selector = hf_mqtt_sub_qos;
|
|
|
|
}
|
|
|
|
|
2016-09-08 19:26:12 +00:00
|
|
|
for(mqtt_msg_len -= 2; mqtt_msg_len > 0;)
|
2014-04-06 20:31:53 +00:00
|
|
|
{
|
|
|
|
mqtt_str_len = tvb_get_ntohs(tvb, offset);
|
2016-09-08 19:26:12 +00:00
|
|
|
proto_tree_add_item(mqtt_tree, hf_mqtt_topic_len, tvb, offset, 2, ENC_BIG_ENDIAN);
|
2014-04-23 17:15:26 +00:00
|
|
|
offset += 2;
|
2014-04-06 20:31:53 +00:00
|
|
|
mqtt_msg_len -= 2;
|
|
|
|
|
2016-09-08 19:26:12 +00:00
|
|
|
proto_tree_add_item(mqtt_tree, hf_mqtt_topic, tvb, offset, mqtt_str_len, ENC_UTF_8|ENC_NA);
|
2014-04-06 20:31:53 +00:00
|
|
|
offset += mqtt_str_len;
|
|
|
|
mqtt_msg_len -= mqtt_str_len;
|
|
|
|
|
2017-11-04 12:25:45 +00:00
|
|
|
proto_tree_add_item(mqtt_tree, hf_version_selector, tvb, offset, 1, ENC_BIG_ENDIAN);
|
2014-04-23 17:15:26 +00:00
|
|
|
offset += 1;
|
|
|
|
mqtt_msg_len -= 1;
|
2014-04-06 20:31:53 +00:00
|
|
|
}
|
|
|
|
break;
|
|
|
|
|
|
|
|
case MQTT_UNSUBSCRIBE:
|
2017-10-15 09:15:13 +00:00
|
|
|
/* After the Message Id field is found, the following fields must appear
|
|
|
|
* at least once:
|
|
|
|
* |TopicName|
|
2014-04-06 20:31:53 +00:00
|
|
|
*/
|
2016-09-08 19:26:12 +00:00
|
|
|
proto_tree_add_item(mqtt_tree, hf_mqtt_msgid, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
|
|
offset += 2;
|
|
|
|
for(mqtt_msg_len -= 2; mqtt_msg_len > 0;)
|
2014-04-06 20:31:53 +00:00
|
|
|
{
|
|
|
|
mqtt_str_len = tvb_get_ntohs(tvb, offset);
|
2016-09-08 19:26:12 +00:00
|
|
|
proto_tree_add_item(mqtt_tree, hf_mqtt_topic_len, tvb, offset, 2, ENC_BIG_ENDIAN);
|
2014-04-23 17:15:26 +00:00
|
|
|
offset += 2;
|
2014-04-06 20:31:53 +00:00
|
|
|
mqtt_msg_len -= 2;
|
|
|
|
|
2016-09-08 19:26:12 +00:00
|
|
|
proto_tree_add_item(mqtt_tree, hf_mqtt_topic, tvb, offset, mqtt_str_len, ENC_UTF_8|ENC_NA);
|
2014-04-06 20:31:53 +00:00
|
|
|
offset += mqtt_str_len;
|
|
|
|
mqtt_msg_len -= mqtt_str_len;
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
|
|
|
|
case MQTT_SUBACK:
|
2017-10-15 09:15:13 +00:00
|
|
|
/* The SUBACK message contains a list of granted QoS levels that come
|
|
|
|
* after the Message Id field. The size of each QoS entry is 1 byte.
|
2014-04-06 20:31:53 +00:00
|
|
|
*/
|
2016-09-08 19:26:12 +00:00
|
|
|
proto_tree_add_item(mqtt_tree, hf_mqtt_msgid, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
|
|
offset += 2;
|
2017-11-04 12:25:45 +00:00
|
|
|
|
|
|
|
if (mqtt->runtime_proto_version == MQTT_PROTO_V50)
|
|
|
|
{
|
|
|
|
offset += dissect_mqtt_properties(tvb, mqtt_tree, offset);
|
|
|
|
}
|
|
|
|
|
2016-09-08 19:26:12 +00:00
|
|
|
for(mqtt_msg_len -= 2; mqtt_msg_len > 0; mqtt_msg_len--)
|
2014-04-06 20:31:53 +00:00
|
|
|
{
|
2016-09-08 19:26:12 +00:00
|
|
|
proto_tree_add_item(mqtt_tree, hf_mqtt_suback_qos, tvb, offset, 1, ENC_BIG_ENDIAN);
|
2014-04-23 17:15:26 +00:00
|
|
|
offset += 1;
|
2014-04-06 20:31:53 +00:00
|
|
|
}
|
|
|
|
break;
|
|
|
|
|
|
|
|
case MQTT_PUBACK:
|
|
|
|
case MQTT_PUBREC:
|
|
|
|
case MQTT_PUBREL:
|
|
|
|
case MQTT_PUBCOMP:
|
2017-11-04 12:25:45 +00:00
|
|
|
proto_tree_add_item(mqtt_tree, hf_mqtt_msgid, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
|
|
offset += 2;
|
|
|
|
/* FALLTHROUGH */
|
|
|
|
case MQTT_DISCONNECT:
|
|
|
|
if (mqtt->runtime_proto_version == MQTT_PROTO_V50)
|
|
|
|
{
|
|
|
|
proto_tree_add_item(mqtt_tree, hf_mqtt_reason_code, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
|
|
offset += 1;
|
|
|
|
|
|
|
|
offset += dissect_mqtt_properties(tvb, mqtt_tree, offset);
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
|
2014-04-06 20:31:53 +00:00
|
|
|
case MQTT_UNSUBACK:
|
2016-09-08 19:26:12 +00:00
|
|
|
proto_tree_add_item(mqtt_tree, hf_mqtt_msgid, tvb, offset, 2, ENC_BIG_ENDIAN);
|
2017-11-04 12:25:45 +00:00
|
|
|
offset += 2;
|
|
|
|
|
|
|
|
if (mqtt->runtime_proto_version == MQTT_PROTO_V50)
|
|
|
|
{
|
|
|
|
offset += dissect_mqtt_properties(tvb, mqtt_tree, offset);
|
|
|
|
}
|
2014-04-06 20:31:53 +00:00
|
|
|
break;
|
|
|
|
|
|
|
|
/* The following messages don't have variable header */
|
|
|
|
case MQTT_PINGREQ:
|
|
|
|
case MQTT_PINGRESP:
|
2017-11-04 12:25:45 +00:00
|
|
|
break;
|
|
|
|
|
|
|
|
case MQTT_AUTH:
|
|
|
|
/* MQTT v5.0: The Reason Code and Property Length can be omitted if
|
|
|
|
* the Reason Code is 0x00 (Success) and there are no Properties.
|
|
|
|
* In this case the AUTH has a Remaining Length of 0.
|
|
|
|
*/
|
|
|
|
if (mqtt->runtime_proto_version == MQTT_PROTO_V50 && mqtt_msg_len > 0)
|
|
|
|
{
|
|
|
|
proto_tree_add_item(mqtt_tree, hf_mqtt_reason_code, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
|
|
offset += 1;
|
|
|
|
|
|
|
|
offset += dissect_mqtt_properties(tvb, mqtt_tree, offset);
|
|
|
|
}
|
|
|
|
|
2014-04-06 20:31:53 +00:00
|
|
|
break;
|
|
|
|
}
|
2017-10-15 10:18:38 +00:00
|
|
|
|
|
|
|
return tvb_captured_length(tvb);
|
2014-04-06 20:31:53 +00:00
|
|
|
}
|
|
|
|
|
2014-05-23 15:42:49 +00:00
|
|
|
/**
|
|
|
|
"The minimum size of MQTT Packet is 2 bytes(Ping Req, Ping Rsp,
|
|
|
|
Disconnect), and the maximum size is 256MB. Hence minimum fixed
|
|
|
|
length should be 2 bytes for tcp_dissect_pdu.
|
|
|
|
|
|
|
|
If the length filed is spread across two TCP segments, then we have a
|
|
|
|
problem, because exception will be raised. So long as MQTT length
|
|
|
|
field(although spread over 4 bytes) is present within single TCP
|
|
|
|
segment we shouldn't have any issue by calling tcp_dissect_pdu with
|
|
|
|
minimum length set to 2."
|
|
|
|
|
|
|
|
XXX: ToDo: Commit a fix for the case of the length field spread across TCP segments.
|
|
|
|
**/
|
|
|
|
|
2014-04-06 20:31:53 +00:00
|
|
|
static int dissect_mqtt_data(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data)
|
|
|
|
{
|
2015-03-20 19:24:34 +00:00
|
|
|
col_clear(pinfo->cinfo, COL_INFO);
|
|
|
|
|
2014-04-06 20:31:53 +00:00
|
|
|
tcp_dissect_pdus(tvb, pinfo, tree,
|
|
|
|
reassemble_mqtt_over_tcp,
|
2014-05-23 15:42:49 +00:00
|
|
|
2, /* Length can be determined within 5 bytes */
|
2014-04-06 20:31:53 +00:00
|
|
|
get_mqtt_pdu_len,
|
|
|
|
dissect_mqtt, data);
|
|
|
|
|
|
|
|
return tvb_captured_length(tvb);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Register the protocol with Wireshark
|
|
|
|
*/
|
|
|
|
void proto_register_mqtt(void)
|
|
|
|
{
|
|
|
|
static hf_register_info hf_mqtt[] = {
|
|
|
|
{ &hf_mqtt_msg_len,
|
|
|
|
{ "Msg Len", "mqtt.len",
|
|
|
|
FT_UINT64, BASE_DEC, NULL, 0,
|
|
|
|
NULL, HFILL }},
|
|
|
|
{ &hf_mqtt_hdrflags,
|
|
|
|
{ "Header Flags", "mqtt.hdrflags",
|
2016-09-08 19:26:12 +00:00
|
|
|
FT_UINT8, BASE_HEX, NULL, 0,
|
2014-04-06 20:31:53 +00:00
|
|
|
NULL, HFILL }},
|
|
|
|
{ &hf_mqtt_msg_type,
|
|
|
|
{ "Message Type", "mqtt.msgtype",
|
2014-04-23 17:15:26 +00:00
|
|
|
FT_UINT8, BASE_DEC | BASE_EXT_STRING, &mqtt_msgtype_vals_ext, MQTT_MASK_MSG_TYPE,
|
2014-04-06 20:31:53 +00:00
|
|
|
NULL, HFILL }},
|
2017-10-15 10:18:38 +00:00
|
|
|
{ &hf_mqtt_reserved,
|
|
|
|
{ "Reserved", "mqtt.hdr_reserved",
|
|
|
|
FT_UINT8, BASE_DEC, NULL, MQTT_MASK_HDR_RESERVED,
|
|
|
|
"Fixed Header Reserved Field", HFILL }},
|
2017-10-22 19:28:05 +00:00
|
|
|
{ &hf_mqtt_retain_reserved,
|
|
|
|
{ "Reserved", "mqtt.retain_reserved",
|
|
|
|
FT_UINT8, BASE_DEC, NULL, MQTT_MASK_RETAIN,
|
2017-10-15 10:18:38 +00:00
|
|
|
"Fixed Header Reserved Field", HFILL }},
|
2014-04-06 20:31:53 +00:00
|
|
|
{ &hf_mqtt_dup_flag,
|
|
|
|
{ "DUP Flag", "mqtt.dupflag",
|
|
|
|
FT_BOOLEAN, 8, TFS(&tfs_set_notset), MQTT_MASK_DUP_FLAG,
|
|
|
|
NULL, HFILL }},
|
|
|
|
{ &hf_mqtt_qos_level,
|
2016-09-08 19:26:12 +00:00
|
|
|
{ "QoS Level", "mqtt.qos",
|
2014-04-06 20:31:53 +00:00
|
|
|
FT_UINT8, BASE_DEC, VALS(mqtt_qos_vals), MQTT_MASK_QOS,
|
|
|
|
NULL, HFILL }},
|
|
|
|
{ &hf_mqtt_retain,
|
|
|
|
{ "Retain", "mqtt.retain",
|
|
|
|
FT_BOOLEAN, 8, TFS(&tfs_set_notset), MQTT_MASK_RETAIN,
|
|
|
|
NULL, HFILL }},
|
|
|
|
/* Conn-Ack */
|
2017-10-22 19:28:05 +00:00
|
|
|
{ &hf_mqtt_conack_reserved,
|
|
|
|
{ "Reserved", "mqtt.conack.flags.reserved",
|
|
|
|
FT_BOOLEAN, 8, TFS(&tfs_set_notset), 0,
|
|
|
|
NULL, HFILL }},
|
2016-09-08 19:26:12 +00:00
|
|
|
{ &hf_mqtt_conack_flags,
|
|
|
|
{ "Acknowledge Flags", "mqtt.conack.flags",
|
|
|
|
FT_UINT8, BASE_HEX, NULL, 0,
|
|
|
|
NULL, HFILL }},
|
|
|
|
{ &hf_mqtt_conackflag_reserved,
|
|
|
|
{ "Reserved", "mqtt.conack.flags.reserved",
|
|
|
|
FT_BOOLEAN, 8, TFS(&tfs_set_notset), MQTT_CONACKMASK_RESERVED,
|
|
|
|
NULL, HFILL }},
|
|
|
|
{ &hf_mqtt_conackflag_sp,
|
|
|
|
{ "Session Present", "mqtt.conack.flags.sp",
|
|
|
|
FT_BOOLEAN, 8, TFS(&tfs_set_notset), MQTT_CONACKMASK_SP,
|
|
|
|
"Session Present (version 3.1.1)", HFILL }},
|
|
|
|
{ &hf_mqtt_conack_code,
|
|
|
|
{ "Return Code", "mqtt.conack.val",
|
|
|
|
FT_UINT8, BASE_DEC, VALS(mqtt_conack_vals), 0,
|
2014-04-06 20:31:53 +00:00
|
|
|
NULL, HFILL }},
|
|
|
|
/* Publish-Ack / Publish-Rec / Publish-Rel / Publish-Comp / Unsubscribe-Ack */
|
|
|
|
{ &hf_mqtt_msgid,
|
|
|
|
{ "Message Identifier", "mqtt.msgid",
|
2016-09-08 19:26:12 +00:00
|
|
|
FT_UINT16, BASE_DEC, NULL, 0,
|
|
|
|
NULL, HFILL }},
|
|
|
|
{ &hf_mqtt_sub_qos,
|
|
|
|
{ "Requested QoS", "mqtt.sub.qos",
|
2016-09-11 18:27:50 +00:00
|
|
|
FT_UINT8, BASE_DEC, VALS(mqtt_qos_vals), 0,
|
2014-04-06 20:31:53 +00:00
|
|
|
NULL, HFILL }},
|
2016-09-08 19:26:12 +00:00
|
|
|
{ &hf_mqtt_suback_qos,
|
|
|
|
{ "Granted QoS", "mqtt.suback.qos",
|
|
|
|
FT_UINT8, BASE_DEC, VALS(mqtt_subqos_vals), 0,
|
|
|
|
NULL, HFILL }},
|
|
|
|
{ &hf_mqtt_topic_len,
|
|
|
|
{ "Topic Length", "mqtt.topic_len",
|
|
|
|
FT_UINT16, BASE_DEC, NULL, 0,
|
2014-04-06 20:31:53 +00:00
|
|
|
NULL, HFILL }},
|
|
|
|
{ &hf_mqtt_topic,
|
|
|
|
{ "Topic", "mqtt.topic",
|
|
|
|
FT_STRING, BASE_NONE, NULL, 0,
|
|
|
|
NULL, HFILL }},
|
2016-09-08 19:26:12 +00:00
|
|
|
{ &hf_mqtt_will_topic_len,
|
|
|
|
{ "Will Topic Length", "mqtt.willtopic_len",
|
|
|
|
FT_UINT16, BASE_DEC, NULL, 0,
|
|
|
|
NULL, HFILL }},
|
2014-04-06 20:31:53 +00:00
|
|
|
{ &hf_mqtt_will_topic,
|
|
|
|
{ "Will Topic", "mqtt.willtopic",
|
|
|
|
FT_STRING, BASE_NONE, NULL, 0,
|
|
|
|
NULL, HFILL }},
|
|
|
|
{ &hf_mqtt_will_msg,
|
|
|
|
{ "Will Message", "mqtt.willmsg",
|
|
|
|
FT_STRING, BASE_NONE, NULL, 0,
|
|
|
|
NULL, HFILL }},
|
2016-09-08 19:26:12 +00:00
|
|
|
{ &hf_mqtt_will_msg_len,
|
|
|
|
{ "Will Message Length", "mqtt.willmsg_len",
|
|
|
|
FT_UINT16, BASE_DEC, NULL, 0,
|
|
|
|
NULL, HFILL }},
|
|
|
|
{ &hf_mqtt_username_len,
|
|
|
|
{ "User Name Length", "mqtt.username_len",
|
|
|
|
FT_UINT16, BASE_DEC, NULL, 0,
|
|
|
|
NULL, HFILL }},
|
2014-04-06 20:31:53 +00:00
|
|
|
{ &hf_mqtt_username,
|
|
|
|
{ "User Name", "mqtt.username",
|
|
|
|
FT_STRING, BASE_NONE, NULL, 0,
|
|
|
|
NULL, HFILL }},
|
2016-09-08 19:26:12 +00:00
|
|
|
{ &hf_mqtt_passwd_len,
|
|
|
|
{ "Password Length", "mqtt.passwd_len",
|
|
|
|
FT_UINT16, BASE_DEC, NULL, 0,
|
|
|
|
NULL, HFILL }},
|
2014-04-06 20:31:53 +00:00
|
|
|
{ &hf_mqtt_passwd,
|
|
|
|
{ "Password", "mqtt.passwd",
|
|
|
|
FT_STRING, BASE_NONE, NULL, 0,
|
|
|
|
NULL, HFILL }},
|
|
|
|
{ &hf_mqtt_pubmsg,
|
|
|
|
{ "Message", "mqtt.msg",
|
|
|
|
FT_STRING, BASE_NONE, NULL, 0,
|
|
|
|
NULL, HFILL }},
|
2017-10-31 10:28:05 +00:00
|
|
|
{ &hf_mqtt_pubmsg_decoded,
|
|
|
|
{ "Message decoded as", "mqtt.msg_decoded_as",
|
|
|
|
FT_STRING, BASE_NONE, NULL, 0,
|
|
|
|
NULL, HFILL }},
|
2016-09-08 19:26:12 +00:00
|
|
|
{ &hf_mqtt_proto_len,
|
|
|
|
{ "Protocol Name Length", "mqtt.proto_len",
|
|
|
|
FT_UINT16, BASE_DEC, NULL, 0,
|
|
|
|
NULL, HFILL }},
|
2014-04-06 20:31:53 +00:00
|
|
|
{ &hf_mqtt_proto_name,
|
|
|
|
{ "Protocol Name", "mqtt.protoname",
|
|
|
|
FT_STRING, BASE_NONE, NULL, 0,
|
|
|
|
NULL, HFILL }},
|
2016-09-08 19:26:12 +00:00
|
|
|
{ &hf_mqtt_client_id_len,
|
|
|
|
{ "Client ID Length", "mqtt.clientid_len",
|
|
|
|
FT_UINT16, BASE_DEC, NULL, 0,
|
|
|
|
NULL, HFILL }},
|
2014-04-06 20:31:53 +00:00
|
|
|
{ &hf_mqtt_client_id,
|
|
|
|
{ "Client ID", "mqtt.clientid",
|
|
|
|
FT_STRING, BASE_NONE, NULL, 0,
|
|
|
|
NULL, HFILL }},
|
|
|
|
{ &hf_mqtt_proto_ver,
|
|
|
|
{ "Version", "mqtt.ver",
|
2017-10-16 05:11:48 +00:00
|
|
|
FT_UINT8, BASE_DEC, VALS(mqtt_protocol_version_vals), 0,
|
|
|
|
"MQTT version", HFILL }},
|
2014-04-06 20:31:53 +00:00
|
|
|
/* Connect Flags */
|
|
|
|
{ &hf_mqtt_conflags,
|
|
|
|
{ "Connect Flags", "mqtt.conflags",
|
2016-09-08 19:26:12 +00:00
|
|
|
FT_UINT8, BASE_HEX, NULL, 0,
|
2014-04-06 20:31:53 +00:00
|
|
|
NULL, HFILL }},
|
|
|
|
{ &hf_mqtt_conflag_user,
|
|
|
|
{ "User Name Flag", "mqtt.conflag.uname",
|
|
|
|
FT_BOOLEAN, 8, TFS(&tfs_set_notset), MQTT_CONMASK_USER,
|
|
|
|
NULL, HFILL }},
|
|
|
|
{ &hf_mqtt_conflag_passwd,
|
|
|
|
{ "Password Flag", "mqtt.conflag.passwd",
|
|
|
|
FT_BOOLEAN, 8, TFS(&tfs_set_notset), MQTT_CONMASK_PASSWD,
|
|
|
|
NULL, HFILL }},
|
|
|
|
{ &hf_mqtt_conflag_will_retain,
|
|
|
|
{ "Will Retain", "mqtt.conflag.retain",
|
|
|
|
FT_BOOLEAN, 8, TFS(&tfs_set_notset), MQTT_CONMASK_RETAIN,
|
|
|
|
NULL, HFILL }},
|
|
|
|
{ &hf_mqtt_conflag_will_qos,
|
2016-09-08 19:26:12 +00:00
|
|
|
{ "QoS Level", "mqtt.conflag.qos",
|
2014-04-06 20:31:53 +00:00
|
|
|
FT_UINT8, BASE_DEC, VALS(mqtt_qos_vals), MQTT_CONMASK_QOS,
|
|
|
|
NULL, HFILL }},
|
|
|
|
{ &hf_mqtt_conflag_will_flag,
|
|
|
|
{ "Will Flag", "mqtt.conflag.willflag",
|
|
|
|
FT_BOOLEAN, 8, TFS(&tfs_set_notset), MQTT_CONMASK_WILLFLAG,
|
|
|
|
NULL, HFILL }},
|
|
|
|
{ &hf_mqtt_conflag_clean_sess,
|
|
|
|
{ "Clean Session Flag", "mqtt.conflag.cleansess",
|
|
|
|
FT_BOOLEAN, 8, TFS(&tfs_set_notset), MQTT_CONMASK_CLEANSESS,
|
|
|
|
NULL, HFILL }},
|
2014-04-23 17:15:26 +00:00
|
|
|
{ &hf_mqtt_conflag_reserved,
|
|
|
|
{ "(Reserved)", "mqtt.conflag.reserved",
|
|
|
|
FT_BOOLEAN, 8, TFS(&tfs_set_notset), MQTT_CONMASK_RESERVED,
|
|
|
|
NULL, HFILL }},
|
2014-04-06 20:31:53 +00:00
|
|
|
{ &hf_mqtt_keep_alive,
|
|
|
|
{ "Keep Alive", "mqtt.kalive",
|
|
|
|
FT_UINT16, BASE_DEC, NULL, 0,
|
2017-11-04 12:25:45 +00:00
|
|
|
NULL, HFILL }},
|
|
|
|
/* xxx */
|
|
|
|
{ &hf_mqtt_subscription_options,
|
|
|
|
{ "Subscription Options", "mqtt.subscription_options",
|
|
|
|
FT_UINT8, BASE_HEX, NULL, 0,
|
|
|
|
NULL, HFILL }},
|
|
|
|
{ &hf_mqtt_reason_code,
|
|
|
|
{ "Reason Code", "mqtt.reason_code",
|
|
|
|
FT_UINT8, BASE_DEC, NULL, 0,
|
|
|
|
NULL, HFILL }},
|
|
|
|
{ &hf_mqtt_property_len,
|
|
|
|
{ "Property Length", "mqtt.property_len",
|
|
|
|
FT_UINT64, BASE_DEC, NULL, 0,
|
|
|
|
NULL, HFILL }},
|
|
|
|
{ &hf_mqtt_property,
|
|
|
|
{ "Property", "mqtt.property",
|
|
|
|
FT_STRING, BASE_NONE, NULL, 0,
|
|
|
|
NULL, HFILL }},
|
2014-04-06 20:31:53 +00:00
|
|
|
};
|
|
|
|
|
|
|
|
/* Setup protocol subtree arrays */
|
|
|
|
static gint* ett_mqtt[] = {
|
|
|
|
&ett_mqtt_hdr,
|
|
|
|
&ett_mqtt_msg,
|
|
|
|
&ett_mqtt_hdr_flags,
|
2016-09-08 19:26:12 +00:00
|
|
|
&ett_mqtt_con_flags,
|
|
|
|
&ett_mqtt_conack_flags
|
2014-04-06 20:31:53 +00:00
|
|
|
};
|
|
|
|
|
2017-10-31 10:28:05 +00:00
|
|
|
static uat_field_t mqtt_message_decode_flds[] = {
|
|
|
|
UAT_FLD_VS(message_decode, match_criteria, "Match criteria", match_criteria, "Match criteria"),
|
|
|
|
UAT_FLD_CSTRING(message_decode, topic_pattern, "Topic pattern", "Pattern to match for the topic"),
|
|
|
|
UAT_FLD_PROTO(message_decode, payload_proto, "Payload protocol",
|
|
|
|
"Protocol to be used for the message part of the matching topic"),
|
|
|
|
UAT_END_FIELDS
|
|
|
|
};
|
|
|
|
|
|
|
|
uat_t *message_uat = uat_new("Message Decoding",
|
|
|
|
sizeof(mqtt_message_decode_t),
|
|
|
|
"mqtt_message_decoding",
|
|
|
|
TRUE,
|
|
|
|
&mqtt_message_decodes,
|
|
|
|
&num_mqtt_message_decodes,
|
|
|
|
UAT_AFFECTS_DISSECTION, /* affects dissection of packets, but not set of named fields */
|
|
|
|
"ChMQTTMessageDecoding",
|
|
|
|
mqtt_message_decode_copy_cb,
|
|
|
|
mqtt_message_decode_update_cb,
|
|
|
|
mqtt_message_decode_free_cb,
|
|
|
|
NULL,
|
|
|
|
NULL,
|
|
|
|
mqtt_message_decode_flds);
|
|
|
|
|
|
|
|
module_t *mqtt_module;
|
|
|
|
|
2014-04-06 20:31:53 +00:00
|
|
|
/* Register protocol names and descriptions */
|
|
|
|
proto_mqtt = proto_register_protocol("MQ Telemetry Transport Protocol", "MQTT", "mqtt");
|
|
|
|
|
|
|
|
/* Register the dissector */
|
2015-12-09 04:04:01 +00:00
|
|
|
mqtt_handle = register_dissector("mqtt", dissect_mqtt_data, proto_mqtt);
|
2014-04-06 20:31:53 +00:00
|
|
|
|
|
|
|
proto_register_field_array(proto_mqtt, hf_mqtt, array_length(hf_mqtt));
|
|
|
|
proto_register_subtree_array(ett_mqtt, array_length(ett_mqtt));
|
2017-10-31 10:28:05 +00:00
|
|
|
|
|
|
|
mqtt_module = prefs_register_protocol(proto_mqtt, NULL);
|
|
|
|
|
|
|
|
prefs_register_uat_preference(mqtt_module, "message_decode_table",
|
|
|
|
"Message Decoding",
|
|
|
|
"A table that enumerates custom message decodes to be used for a certain topic",
|
|
|
|
message_uat);
|
2014-04-06 20:31:53 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Dissector Handoff
|
|
|
|
*/
|
|
|
|
void proto_reg_handoff_mqtt(void)
|
|
|
|
{
|
2016-10-07 20:25:01 +00:00
|
|
|
dissector_add_uint_with_preference("tcp.port", MQTT_DEFAULT_PORT, mqtt_handle);
|
2016-03-24 20:47:04 +00:00
|
|
|
ssl_dissector_add(MQTT_SSL_DEFAULT_PORT, mqtt_handle);
|
2014-04-06 20:31:53 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Editor modelines - http://www.wireshark.org/tools/modelines.html
|
|
|
|
*
|
|
|
|
* Local variables:
|
|
|
|
* c-basic-offset: 2
|
|
|
|
* tab-width: 8
|
|
|
|
* indent-tabs-mode: nil
|
|
|
|
* End:
|
|
|
|
*
|
2014-04-23 17:15:26 +00:00
|
|
|
* vi: set shiftwidth=2 tabstop=8 expandtab:
|
|
|
|
* :indentSize=2:tabSize=8:noTabs=true:
|
2014-04-06 20:31:53 +00:00
|
|
|
*/
|