Provided by: mosquitto_2.0.20-1_amd64 
NAME
mosquitto_ctrl - a tool for initialising/configuring a Mosquitto broker instance
SYNOPSIS
mosquitto_ctrl [connection-options | -o config-file] module-name module-command
[command-options]
connection-options:
{[-h hostname] [--unix socket path] [-p port-number] [-u username] [-P password]
| -L URL} [-A bind-address] [-c] [-d] [-i client-id] [-q message-QoS]
[--quiet] [-V protocol-version]
[[{--cafile file | --capath dir} [--cert file] [--key file] [--ciphers ciphers] [--tls-version version] [--tls-alpn protocol] [--tls-engine engine] [--keyform {pem | engine}] [--tls-engine-kpass-sha1 kpass-sha1] [--insecure]]
|
[--psk hex-key --psk-identity identity [--ciphers ciphers] [--tls-version version]]]
[--proxy socks-url]
mosquitto_ctrl [--help]
DESCRIPTION
mosquitto_ctrl is a tool for helping configure a Mosquitto broker instance.
ENCRYPTED CONNECTIONS
mosquitto_ctrl supports TLS encrypted connections. It is strongly recommended that you use
an encrypted connection for all remote use of mosquitto_ctrl.
To enable TLS connections when using x509 certificates, one of either --cafile or --capath
must be provided as an option.
To enable TLS connections when using TLS-PSK, you must use the --psk and the
--psk-identity options.
MODULES
Dynamic security
Authentication, and role based access control with users and groups. Uses the dynsec
module name. See: mosquitto_ctrl_dynsec(1)
External modules
mosquitto_ctrl has the ability to load external modules in the form of shared
libraries. For example using the module name example will try to load the external
module mosquitto_ctrl_example.so or mosquitto_ctrl_example.dll, depending on platform.
This allows new functionality to be added to Mosquitto by combining a plugin and
mosquitto_ctrl module, without having to recompile any Mosquitto source code.
CONNECTION OPTIONS
The options below may be given on the command line, but may also be placed in a config
file located at $XDG_CONFIG_HOME/mosquitto_ctrl or $HOME/.config/mosquitto_ctrl.
The config file may be specified manually with the -o config-file option.
The config file should have one pair of -option value per line. The values in the config
file will be used as defaults and can be overridden by using the command line. The
exceptions to this are the message type options, of which only one can be specified. Note
also that currently some options cannot be negated, e.g. -S. Config file lines that have
a # as the first character are treated as comments and not processed any further.
-A
Bind the outgoing connection to a local ip address/hostname. Use this argument if you
need to restrict network communication to a particular interface.
--cafile
Define the path to a file containing PEM encoded CA certificates that are trusted.
Used to enable SSL communication.
See also --capath
--capath
Define the path to a directory containing PEM encoded CA certificates that are
trusted. Used to enable SSL communication.
For --capath to work correctly, the certificate files must have ".crt" as the file
ending and you must run "openssl rehash <path to capath>" each time you add/remove a
certificate.
See also --cafile
--cert
Define the path to a file containing a PEM encoded certificate for this client, if
required by the server.
See also --key.
--ciphers
An openssl compatible list of TLS ciphers to support in the client. See ciphers(1) for
more information.
-d, --debug
Enable debug messages.
-D, --property
Use an MQTT v5 property with this publish. If you use this option, the client will be
set to be an MQTT v5 client. This option has two forms:
-D command identifier value
-D command identifier name value
command is the MQTT command/packet identifier and can be one of CONNECT, PUBLISH,
PUBREL, DISCONNECT, AUTH, or WILL. The properties available for each command are
listed in the Properties section.
identifier is the name of the property to add. This is as described in the
specification, but with '-' as a word separator. For example:
payload-format-indicator. More details are in the Properties section.
value is the value of the property to add, with a data type that is property specific.
name is only used for the user-property property as the first of the two strings in
the string pair. In that case, value is the second of the strings in the pair.
--help
Display usage information.
-h, --host
Specify the host to connect to. Defaults to localhost.
-i, --id
The id to use for this client. If not given, a client id will be generated depending
on the MQTT version being used. For v3.1.1/v3.1, the client generates a client id in
the format mosq-XXXXXXXXXXXXXXXXXX, where the X are replaced with random alphanumeric
characters. For v5.0, the client sends a zero length client id, and the server will
generate a client id for the client.
This option cannot be used at the same time as the --id-prefix argument.
--insecure
When using certificate based encryption, this option disables verification of the
server hostname in the server certificate. This can be useful when testing initial
server configurations but makes it possible for a malicious third party to impersonate
your server through DNS spoofing, for example. Use this option in testing only. If you
need to resort to using this option in a production environment, your setup is at
fault and there is no point using encryption.
--key
Define the path to a file containing a PEM encoded private key for this client, if
required by the server.
See also --cert.
--keyform
Specifies the type of private key in use when making TLS connections.. This can be
"pem" or "engine". This parameter is useful when a TPM module is being used and the
private key has been created with it. Defaults to "pem", which means normal private
key files are used.
See also --tls-engine.
-L, --url
Specify specify user, password, hostname, port and topic at once as a URL. The URL
must be in the form: mqtt(s)://[username[:password]@]host[:port]/topic
If the scheme is mqtt:// then the port defaults to 1883. If the scheme is mqtts://
then the port defaults to 8883.
--nodelay
Disable Nagle's algorithm for the socket. This means that latency of sent messages is
reduced, which is particularly noticeable for small, reasonably infrequent messages.
Using this option may result in more packets being sent than would normally be
necessary.
-o config-file
Provide a path to a config file to load options from. The config file should have one
pair of -option value per line. The values in the config file will be used as defaults
and can be overridden by using the command line. The exceptions to this are the
message type options, of which only one can be specified. Note also that currently
some options cannot be negated, e.g. -S. Config file lines that have a # as the first
character are treated as comments and not processed any further.
-p, --port
Connect to the port specified. If not given, the default of 1883 for plain MQTT or
8883 for MQTT over TLS will be used.
-P, --pw
Provide a password to be used for authenticating with the broker. Using this argument
without also specifying a username is invalid when using MQTT v3.1 or v3.1.1. See also
the --username option.
--proxy
Specify a SOCKS5 proxy to connect through. "None" and "username" authentication types
are supported. The socks-url must be of the form
socks5h://[username[:password]@]host[:port]. The protocol prefix socks5h means that
hostnames are resolved by the proxy. The symbols %25, %3A and %40 are URL decoded into
%, : and @ respectively, if present in the username or password.
If username is not given, then no authentication is attempted. If the port is not
given, then the default of 1080 is used.
More SOCKS versions may be available in the future, depending on demand, and will use
different protocol prefixes as described in curl(1).
--psk
Provide the hexadecimal (no leading 0x) pre-shared-key matching the one used on the
broker to use TLS-PSK encryption support. --psk-identity must also be provided to
enable TLS-PSK.
--psk-identity
The client identity to use with TLS-PSK support. This may be used instead of a
username if the broker is configured to do so.
-q, --qos
Specify the quality of service to use for messages, from 0, 1 and 2. Defaults to 1.
--quiet
If this argument is given, no runtime errors will be printed. This excludes any error
messages given in case of invalid user input (e.g. using --port without a port).
--tls-alpn
Provide a protocol to use when connecting to a broker that has multiple protocols
available on a single port, e.g. MQTT and WebSockets.
--tls-engine
A valid openssl engine id. These can be listed with openssl engine command.
See also --keyform.
--tls-engine-kpass-sha1
SHA1 of the private key password when using an TLS engine. Some TLS engines such as
the TPM engine may require the use of a password in order to be accessed. This option
allows a hex encoded SHA1 hash of the password to the engine directly, instead of the
user being prompted for the password.
See also --tls-engine.
--tls-version
Choose which TLS protocol version to use when communicating with the broker. Valid
options are tlsv1.3, tlsv1.2 and tlsv1.1. The default value is tlsv1.2. Must match the
protocol version used by the broker.
-u, --username
Provide a username to be used for authenticating with the broker. See also the --pw
argument.
--unix
Connect to a broker through a local unix domain socket instead of a TCP socket. This
is a replacement for -h and -L. For example: mosquitto_ctrl --unix /tmp/mosquitto.sock
...
See the socket_domain option in mosquitto.conf(5) to configure Mosquitto to listen on
a unix socket.
-V, --protocol-version
Specify which version of the MQTT protocol should be used when connecting to the
rmeote broker. Can be 5, 311, 31, or the more verbose mqttv5, mqttv311, or mqttv31.
Defaults to 311.
PROPERTIES
The -D / --property option allows adding properties to different stages of the
mosquitto_ctrl run. The properties supported for each command are as follows:
Connect
• authentication-data (binary data - note treated as a string in mosquitto_ctrl)
• authentication-method (UTF-8 string pair)
• maximum-packet-size (32-bit unsigned integer)
• receive-maximum (16-bit unsigned integer)
• request-problem-information (8-bit unsigned integer)
• request-response-information (8-bit unsigned integer)
• session-expiry-interval (32-bit unsigned integer, note use -x instead)
• topic-alias-maximum (16-bit unsigned integer)
• user-property (UTF-8 string pair)
Publish
• content-type (UTF-8 string)
• correlation-data (binary data - note treated as a string in mosquitto_ctrl)
• message-expiry-interval (32-bit unsigned integer)
• payload-format-indicator (8-bit unsigned integer)
• response-topic (UTF-8 string)
• topic-alias (16-bit unsigned integer)
• user-property (UTF-8 string pair)
Disconnect
• session-expiry-interval (32-bit unsigned integer)
• user-property (UTF-8 string pair)
Will properties
• content-type (UTF-8 string)
• correlation-data (binary data - note treated as a string in mosquitto_ctrl)
• message-expiry-interval (32-bit unsigned integer)
• payload-format-indicator (8-bit unsigned integer)
• response-topic (UTF-8 string)
• user-property (UTF-8 string pair)
• will-delay-interval (32-bit unsigned integer)
EXIT STATUS
mosquitto_sub returns zero on success, or non-zero on error. If the connection is refused
by the broker at the MQTT level, then the exit code is the CONNACK reason code. If another
error occurs, the exit code is a libmosquitto return value.
MQTT v3.1.1 CONNACK codes:
• 0 Success
• 1 Connection refused: Bad protocol version
• 2 Connection refused: Identifier rejected
• 3 Connection refused: Server unavailable
• 4 Connection refused: Bad username/password
• 5 Connection refused: Not authorized
MQTT v5 CONNACK codes:
• 0 Success
• 128 Unspecified error
• 129 Malformed packet
• 130 Protocol error
• 131 Implementation specific error
• 132 Unsupported protocol version
• 133 Client ID not valid
• 134 Bad username or password
• 135 Not authorized
• 136 Server unavailable
• 137 Server busy
• 138 Banned
• 139 Server shutting down
• 140 Bad authentication method
• 141 Keep alive timeout
• 142 Session taken over
• 143 Topic filter invalid
• 144 Topic name invalid
• 147 Receive maximum exceeded
• 148 Topic alias invalid
• 149 Packet too large
• 148 Message rate too high
• 151 Quota exceeded
• 152 Administrative action
• 153 Payload format invalid
• 154 Retain not supported
• 155 QoS not supported
• 156 Use another server
• 157 Server moved
• 158 Shared subscriptions not supported
• 159 Connection rate exceeded
• 160 Maximum connect time
• 161 Subscription IDs not supported
• 162 Wildcard subscriptions not supported
BUGS
mosquitto bug information can be found at https://github.com/eclipse/mosquitto/issues
SEE ALSO
mqtt(7), mosquitto_rr(1), mosquitto_pub(1), mosquitto_sub(1), mosquitto(8),
libmosquitto(3), mosquitto-tls(7)
AUTHOR
Roger Light <roger@atchoo.org>