These constants define socket option codes for ZSocket::setOption() and ZSocket::getOption(). More...

Variables
const	Qore::ZMQ::ZMQ_AFFINITY = ZMQ_AFFINITY
	Set I/O thread affinity. More...

const	Qore::ZMQ::ZMQ_BACKLOG = ZMQ_BACKLOG
	Set maximum length of the queue of outstanding connections. More...

const	Qore::ZMQ::ZMQ_CONFLATE = ZMQ_CONFLATE
	Keep only last message. More...

const	Qore::ZMQ::ZMQ_CONNECT_RID = ZMQ_CONNECT_RID
	Assign the next outbound connection id. More...

const	Qore::ZMQ::ZMQ_CONNECT_TIMEOUT = ZMQ_CONNECT_TIMEOUT
	Set connect timeout. More...

const	Qore::ZMQ::ZMQ_CURVE_PUBLICKEY = ZMQ_CURVE_PUBLICKEY
	Set CURVE public key. More...

const	Qore::ZMQ::ZMQ_CURVE_SECRETKEY = ZMQ_CURVE_SECRETKEY
	Set CURVE secret key. More...

const	Qore::ZMQ::ZMQ_CURVE_SERVER = ZMQ_CURVE_SERVER
	Set CURVE server role. More...

const	Qore::ZMQ::ZMQ_CURVE_SERVERKEY = ZMQ_CURVE_SERVERKEY
	Set CURVE server key. More...

const	Qore::ZMQ::ZMQ_GSSAPI_PLAINTEXT = ZMQ_GSSAPI_PLAINTEXT
	Disable GSSAPI encryption. More...

const	Qore::ZMQ::ZMQ_GSSAPI_PRINCIPAL = ZMQ_GSSAPI_PRINCIPAL
	Set name of GSSAPI principal. More...

const	Qore::ZMQ::ZMQ_GSSAPI_SERVER = ZMQ_GSSAPI_SERVER
	Set GSSAPI server role. More...

const	Qore::ZMQ::ZMQ_GSSAPI_SERVICE_PRINCIPAL = ZMQ_GSSAPI_SERVICE_PRINCIPAL
	Set name of GSSAPI service principal. More...

const	Qore::ZMQ::ZMQ_HANDSHAKE_IVL = ZMQ_HANDSHAKE_IVL
	Set maximum handshake interval. More...

const	Qore::ZMQ::ZMQ_HEARTBEAT_IVL = ZMQ_HEARTBEAT_IVL
	Set interval between sending ZMTP heartbeats. More...

const	Qore::ZMQ::ZMQ_HEARTBEAT_TIMEOUT = ZMQ_HEARTBEAT_TIMEOUT
	Set timeout for ZMTP heartbeats. More...

const	Qore::ZMQ::ZMQ_HEARTBEAT_TTL = ZMQ_HEARTBEAT_TTL
	Set the TTL value for ZMTP heartbeats. More...

const	Qore::ZMQ::ZMQ_IDENTITY = ZMQ_IDENTITY
	Set socket identity. More...

const	Qore::ZMQ::ZMQ_IMMEDIATE = ZMQ_IMMEDIATE
	Queue messages only to completed connections. More...

const	Qore::ZMQ::ZMQ_INVERT_MATCHING = ZMQ_INVERT_MATCHING
	Invert message filtering. More...

const	Qore::ZMQ::ZMQ_IPV6 = ZMQ_IPV6
	Enable IPv6 on socket. More...

const	Qore::ZMQ::ZMQ_LINGER = ZMQ_LINGER
	Set linger period for socket shutdown. More...

const	Qore::ZMQ::ZMQ_MAXMSGSIZE = ZMQ_MAXMSGSIZE
	Maximum acceptable inbound message size. More...

const	Qore::ZMQ::ZMQ_MULTICAST_HOPS = ZMQ_MULTICAST_HOPS
	Maximum network hops for multicast packets. More...

const	Qore::ZMQ::ZMQ_MULTICAST_MAXTPDU = ZMQ_MULTICAST_MAXTPDU
	Maximum transport data unit size for multicast packets. More...

const	Qore::ZMQ::ZMQ_PLAIN_PASSWORD = ZMQ_PLAIN_PASSWORD
	Set PLAIN security password. More...

const	Qore::ZMQ::ZMQ_PLAIN_SERVER = ZMQ_PLAIN_SERVER
	Set PLAIN server role. More...

const	Qore::ZMQ::ZMQ_PLAIN_USERNAME = ZMQ_PLAIN_USERNAME
	Set PLAIN security username. More...

const	Qore::ZMQ::ZMQ_PROBE_ROUTER = ZMQ_PROBE_ROUTER
	bootstrap connections to ROUTER sockets More...

const	Qore::ZMQ::ZMQ_RATE = ZMQ_RATE
	Set multicast data rate. More...

const	Qore::ZMQ::ZMQ_RCVBUF = ZMQ_RCVBUF
	Set kernel receive buffer size. More...

const	Qore::ZMQ::ZMQ_RCVHWM = ZMQ_RCVHWM
	Set high water mark for inbound messages. More...

const	Qore::ZMQ::ZMQ_RCVTIMEO = ZMQ_RCVTIMEO
	Maximum time before a recv operation returns with `EAGAIN`. More...

const	Qore::ZMQ::ZMQ_RECONNECT_IVL = ZMQ_RECONNECT_IVL
	Set reconnection interval. More...

const	Qore::ZMQ::ZMQ_RECONNECT_IVL_MAX = ZMQ_RECONNECT_IVL_MAX
	Set maximum reconnection interval. More...

const	Qore::ZMQ::ZMQ_RECOVERY_IVL = ZMQ_RECOVERY_IVL
	Set multicast recovery interval. More...

const	Qore::ZMQ::ZMQ_REQ_CORRELATE = ZMQ_REQ_CORRELATE
	match replies with requests More...

const	Qore::ZMQ::ZMQ_REQ_RELAXED = ZMQ_REQ_RELAXED
	relax strict alternation between request and reply More...

const	Qore::ZMQ::ZMQ_ROUTER_HANDOVER = ZMQ_ROUTER_HANDOVER
	handle duplicate client identities on ROUTER sockets More...

const	Qore::ZMQ::ZMQ_ROUTER_MANDATORY = ZMQ_ROUTER_MANDATORY
	accept only routable messages on ROUTER sockets More...

const	Qore::ZMQ::ZMQ_SNDBUF = ZMQ_SNDBUF
	Set kernel transmit buffer size. More...

const	Qore::ZMQ::ZMQ_SNDHWM = ZMQ_SNDHWM
	Set the high water mark for outbound messages. More...

const	Qore::ZMQ::ZMQ_SNDTIMEO = ZMQ_SNDTIMEO
	Maximum time before a send operation returns with `EAGAIN`. More...

const	Qore::ZMQ::ZMQ_SOCKS_PROXY = ZMQ_SOCKS_PROXY
	Set SOCKS5 proxy address. More...

const	Qore::ZMQ::ZMQ_STREAM_NOTIFY = ZMQ_STREAM_NOTIFY
	send connect and disconnect notifications More...

const	Qore::ZMQ::ZMQ_SUBSCRIBE = ZMQ_SUBSCRIBE
	Establish message filter. More...

const	Qore::ZMQ::ZMQ_TCP_KEEPALIVE = ZMQ_TCP_KEEPALIVE
	Override `SO_KEEPALIVE` socket option. More...

const	Qore::ZMQ::ZMQ_TCP_KEEPALIVE_CNT = ZMQ_TCP_KEEPALIVE_CNT
	Override `TCP_KEEPCNT` socket option. More...

const	Qore::ZMQ::ZMQ_TCP_KEEPALIVE_IDLE = ZMQ_TCP_KEEPALIVE_IDLE
	Override `TCP_KEEPIDLE` (or `TCP_KEEPALIVE` on some OSes) More...

const	Qore::ZMQ::ZMQ_TCP_KEEPALIVE_INTVL = ZMQ_TCP_KEEPALIVE_INTVL
	Override `TCP_KEEPINTVL` socket option. More...

const	Qore::ZMQ::ZMQ_TCP_MAXRT = ZMQ_TCP_MAXRT
	Set TCP Maximum Retransmit Timeout. More...

const	Qore::ZMQ::ZMQ_TOS = ZMQ_TOS
	Set the Type-of-Service on socket. More...

const	Qore::ZMQ::ZMQ_UNSUBSCRIBE = ZMQ_UNSUBSCRIBE
	Remove message filter. More...

const	Qore::ZMQ::ZMQ_XPUB_MANUAL = ZMQ_XPUB_MANUAL
	change the subscription handling to manual More...

const	Qore::ZMQ::ZMQ_XPUB_NODROP = ZMQ_XPUB_NODROP
	do not silently drop messages if `SENDHWM` is reached More...

const	Qore::ZMQ::ZMQ_XPUB_VERBOSE = ZMQ_XPUB_VERBOSE
	pass subscribe messages on an XPUB socket More...

const	Qore::ZMQ::ZMQ_XPUB_VERBOSER = ZMQ_XPUB_VERBOSER
	pass subscribe and unsubscribe messages on XPUB socket More...

const	Qore::ZMQ::ZMQ_XPUB_WELCOME_MSG = ZMQ_XPUB_WELCOME_MSG
	Set welcome message that will be received by subscriber when connecting. More...

const	Qore::ZMQ::ZMQ_ZAP_DOMAIN = ZMQ_ZAP_DOMAIN
	Set RFC 27 authentication domain. More...

const	Qore::ZMQ::ZmqOptionCodeMap
	ZeroMQ option map mapping option codes to strings.

const	Qore::ZMQ::ZmqOptionStringMap
	ZeroMQ option map mapping strings to option codes.

Detailed Description

These constants define socket option codes for ZSocket::setOption() and ZSocket::getOption().

Variable Documentation

◆ ZMQ_AFFINITY

const Qore::ZMQ::ZMQ_AFFINITY = ZMQ_AFFINITY

Set I/O thread affinity.

The ZMQ_AFFINITY option shall set the I/O thread affinity for newly created connections on the specified socket.

Affinity determines which threads from the ØMQ I/O thread pool associated with the socket's context shall handle newly created connections. A value of zero specifies no affinity, meaning that work shall be distributed fairly among all ØMQ I/O threads in the thread pool. For non-zero values, the lowest bit corresponds to thread 1, second lowest bit to thread 2 and so on. For example, a value of 3 specifies that subsequent connections on socket shall be handled exclusively by I/O threads 1 and 2.

0MQ Socket Option Information

Property	Description
Option value type	uint64_t
Option value unit	N/A (bitmap)
Default value	0
Applicable socket types	N/A

◆ ZMQ_BACKLOG

const Qore::ZMQ::ZMQ_BACKLOG = ZMQ_BACKLOG

Set maximum length of the queue of outstanding connections.

The ZMQ_BACKLOG option shall set the maximum length of the queue of outstanding peer connections for the specified socket; this only applies to connection-oriented transports. For details refer to your operating system documentation for the listen function.

0MQ Socket Option Information

Property	Description
Option value type	int
Option value unit	connections
Default value	100
Applicable socket types	all, only for connection-oriented transports.

◆ ZMQ_CONFLATE

const Qore::ZMQ::ZMQ_CONFLATE = ZMQ_CONFLATE

Keep only last message.

If set, a socket shall keep only one message in its inbound/outbound queue, this message being the last message received/the last message to be sent. Ignores ZMQ_RCVHWM and ZMQ_SNDHWM options. Does not support multi-part messages, in particular, only one part of it is kept in the socket internal queue.

0MQ Socket Option Information

Property	Description
Option value type	int
Option value unit	boolean
Default value	0 (false)
Applicable socket types	ZSocketPull, ZSocketPush, ZSocketSub, ZSocketPub, ZSocketDealer

◆ ZMQ_CONNECT_RID

const Qore::ZMQ::ZMQ_CONNECT_RID = ZMQ_CONNECT_RID

Assign the next outbound connection id.

The ZMQ_CONNECT_RID option sets the peer id of the next host connected via the ZSocket::connect() call, and immediately readies that connection for data transfer with the named id. This option applies only to the first subsequent call to ZSocket::connect(), calls thereafter use default connection behaviour.

Typical use is to set this socket option ahead of each ZSocket::connect() attempt to a new host. Each connection MUST be assigned a unique name. Assigning a name that is already in use is not allowed.

Useful when connecting ROUTER to ROUTER, or STREAM to STREAM, as it allows for immediate sending to peers. Outbound id framing requirements for ROUTER and STREAM sockets apply.

The peer id should be from 1 to 255 bytes long and MAY NOT start with binary zero.

0MQ Socket Option Information

Property	Description
Option value type	binary data
N/A
nothing
ROUTER, STREAM

◆ ZMQ_CONNECT_TIMEOUT

const Qore::ZMQ::ZMQ_CONNECT_TIMEOUT = ZMQ_CONNECT_TIMEOUT

Set connect timeout.

Sets how long to wait before timing-out a connect() system call. The connect() system call normally takes a long time before it returns a time out error. Setting this option allows the library to time out the call at an earlier interval.

0MQ Socket Option Information

Property	Description
Option value type	int
Option value unit	milliseconds
Default value	0 (disabled)
Applicable socket types	all, when using TCP transports.

◆ ZMQ_CURVE_PUBLICKEY

const Qore::ZMQ::ZMQ_CURVE_PUBLICKEY = ZMQ_CURVE_PUBLICKEY

Set CURVE public key.

Sets the socket's long term public key. You must set this on CURVE client sockets. You can provide the key as 32 binary bytes, or as a 40-character string encoded in the Z85 encoding format and terminated in a null byte. The public key must always be used with the matching secret key. To generate a public/secret key pair, use zmq_curve_keypair(). To derive the public key from a secret key, use zmq_curve_public().

0MQ Socket Option Information

Property	Description
Option value type	binary data or Z85 text string
Option value size	32 (binary) or 40 (byte character string)
Default value	nothing
Applicable socket types	all, when using TCP transport

◆ ZMQ_CURVE_SECRETKEY

const Qore::ZMQ::ZMQ_CURVE_SECRETKEY = ZMQ_CURVE_SECRETKEY

Set CURVE secret key.

Sets the socket's long term secret key. You must set this on both CURVE client and server sockets. You can provide the key as 32 binary bytes, or as a 40-character string encoded in the Z85 encoding format and terminated in a null byte. To generate a public/secret key pair, use zmq_curve_keypair(). To derive the public key from a secret key, use zmq_curve_public().

0MQ Socket Option Information

Property	Description
Option value type	binary data or Z85 text string
Option value size	32 (binary) or 40 (byte character string)
Default value	nothing
Applicable socket types	all, when using TCP transport

◆ ZMQ_CURVE_SERVER

const Qore::ZMQ::ZMQ_CURVE_SERVER = ZMQ_CURVE_SERVER

Set CURVE server role.

Defines whether the socket will act as server for CURVE security. A value of 1 means the socket will act as CURVE server. A value of 0 means the socket will not act as CURVE server, and its security role then depends on other option settings. Setting this to 0 shall reset the socket security to NULL. When you set this you must also set the server's secret key using the ZMQ_CURVE_SECRETKEY option. A server socket does not need to know its own public key.

0MQ Socket Option Information

Property	Description
Option value type	bool
Option value unit	True, False
Default value	False
Applicable socket types	all, when using TCP transport

◆ ZMQ_CURVE_SERVERKEY

const Qore::ZMQ::ZMQ_CURVE_SERVERKEY = ZMQ_CURVE_SERVERKEY

Set CURVE server key.

Sets the socket's long term server key. You must set this on CURVE client sockets. You can provide the key as 32 binary bytes, or as a 40-character string encoded in the Z85 encoding format and terminated in a null byte. This key must have been generated together with the server's secret key. To generate a public/secret key pair, use zmq_curve_keypair().

0MQ Socket Option Information

Property	Description
Option value type	binary data or Z85 text string
Option value size	32 (binary) or 40 (byte character string)
Default value	NULL
Applicable socket types	all, when using TCP transport

◆ ZMQ_GSSAPI_PLAINTEXT

const Qore::ZMQ::ZMQ_GSSAPI_PLAINTEXT = ZMQ_GSSAPI_PLAINTEXT

Disable GSSAPI encryption.

Defines whether communications on the socket will be encrypted. A value of 1 means that communications will be plaintext. A value of 0 means communications will be encrypted.

0MQ Socket Option Information

Property	Description
Option value type	bool
Option value unit	True, False
Default value	False
Applicable socket types	all, when using TCP transport

◆ ZMQ_GSSAPI_PRINCIPAL

const Qore::ZMQ::ZMQ_GSSAPI_PRINCIPAL = ZMQ_GSSAPI_PRINCIPAL

Set name of GSSAPI principal.

Sets the name of the principal for whom GSSAPI credentials should be acquired.

0MQ Socket Option Information

Property	Description
Option value type	character string
Option value unit	N/A
Default value	not set
Applicable socket types	all, when using TCP transport

◆ ZMQ_GSSAPI_SERVER

const Qore::ZMQ::ZMQ_GSSAPI_SERVER = ZMQ_GSSAPI_SERVER

Set GSSAPI server role.

Defines whether the socket will act as server for GSSAPI security. A value of 1 means the socket will act as GSSAPI server. A value of 0 means the socket will act as GSSAPI client.

0MQ Socket Option Information

Property	Description
Option value type	bool
Option value unit	True, False
Default value	False
Applicable socket types	all, when using TCP transport

◆ ZMQ_GSSAPI_SERVICE_PRINCIPAL

const Qore::ZMQ::ZMQ_GSSAPI_SERVICE_PRINCIPAL = ZMQ_GSSAPI_SERVICE_PRINCIPAL

Set name of GSSAPI service principal.

Sets the name of the principal of the GSSAPI server to which a GSSAPI client intends to connect.

0MQ Socket Option Information

Property	Description
Option value type	character string
Option value unit	N/A
Default value	not set
Applicable socket types	all, when using TCP transport

◆ ZMQ_HANDSHAKE_IVL

const Qore::ZMQ::ZMQ_HANDSHAKE_IVL = ZMQ_HANDSHAKE_IVL

Set maximum handshake interval.

The ZMQ_HANDSHAKE_IVL option shall set the maximum handshake interval for the specified socket. Handshaking is the exchange of socket configuration information (socket type, identity, security) that occurs when a connection is first opened, only for connection-oriented transports. If handshaking does not complete within the configured time, the connection shall be closed. The value 0 means no handshake time limit.

0MQ Socket Option Information

Property	Description
Option value type	int
Option value unit	milliseconds
Default value	30000
Applicable socket types	all but STREAM, only for connection-oriented transports

◆ ZMQ_HEARTBEAT_IVL

const Qore::ZMQ::ZMQ_HEARTBEAT_IVL = ZMQ_HEARTBEAT_IVL

Set interval between sending ZMTP heartbeats.

The ZMQ_HEARTBEAT_IVL option shall set the interval between sending ZMTP heartbeats for the specified socket. If this option is set and is greater than 0, then a PING ZMTP command will be sent every ZMQ_HEARTBEAT_IVL milliseconds.

0MQ Socket Option Information

Property	Description
Option value type	int
Option value unit	milliseconds
Default value	0
Applicable socket types	all, when using connection-oriented transports

◆ ZMQ_HEARTBEAT_TIMEOUT

const Qore::ZMQ::ZMQ_HEARTBEAT_TIMEOUT = ZMQ_HEARTBEAT_TIMEOUT

Set timeout for ZMTP heartbeats.

The ZMQ_HEARTBEAT_TIMEOUT option shall set how long to wait before timing-out a connection after sending a PING command and not receiving any traffic. This option is only valid if ZMQ_HEARTBEAT_IVL is also set, and is greater than 0. The connection will time out if there is no traffic received after sending the PING command, but the received traffic does not have to be a PONG command - any received traffic will cancel the timeout.

0MQ Socket Option Information

Property	Description
Option value type	int
Option value unit	milliseconds
Default value	0
Applicable socket types	all, when using connection-oriented transports

◆ ZMQ_HEARTBEAT_TTL

const Qore::ZMQ::ZMQ_HEARTBEAT_TTL = ZMQ_HEARTBEAT_TTL

Set the TTL value for ZMTP heartbeats.

The ZMQ_HEARTBEAT_TTL option shall set the timeout on the remote peer for ZMTP heartbeats. If this option is greater than 0, the remote side shall time out the connection if it does not receive any more traffic within the TTL period. This option does not have any effect if ZMQ_HEARTBEAT_IVL is not set or is 0. Internally, this value is rounded down to the nearest decisecond, any value less than 100 will have no effect.

0MQ Socket Option Information

Property	Description
Option value type	int
Option value unit	milliseconds
Default value	0
Applicable socket types	all, when using connection-oriented transports

◆ ZMQ_IDENTITY

const Qore::ZMQ::ZMQ_IDENTITY = ZMQ_IDENTITY

Set socket identity.

The ZMQ_IDENTITY option shall set the identity of the specified socket when connecting to a ROUTER socket. The identity should be from 1 to 255 bytes long and may contain any values.

If two clients use the same identity when connecting to a ROUTER, the results shall depend on the ZMQ_ROUTER_HANDOVER option setting. If that is not set (or set to the default of zero), the ROUTER socket shall reject clients trying to connect with an already-used identity. If that option is set to 1, the ROUTER socket shall hand-over the connection to the new client and disconnect the existing one.

0MQ Socket Option Information

Property	Description
Option value type	binary data
Option value unit	N/A
Default value	NULL
Applicable socket types	REQ, REP, ROUTER, DEALER.

See also

◆ ZMQ_IMMEDIATE

const Qore::ZMQ::ZMQ_IMMEDIATE = ZMQ_IMMEDIATE

Queue messages only to completed connections.

By default queues will fill on outgoing connections even if the connection has not completed. This can lead to "lost" messages on sockets with round-robin routing (REQ, PUSH, DEALER). If this option is set to True, messages shall be queued only to completed connections. This will cause the socket to block if there are no other connections, but will prevent queues from filling on pipes awaiting connection.

0MQ Socket Option Information

Property	Description
Option value type	bool
Option value unit	True, False
Default value	False
Applicable socket types	all, only for connection-oriented transports.

◆ ZMQ_INVERT_MATCHING

const Qore::ZMQ::ZMQ_INVERT_MATCHING = ZMQ_INVERT_MATCHING

Invert message filtering.

Reverses the filtering behavior of PUB-SUB sockets, when set to True.

On PUB and XPUB sockets, this causes messages to be sent to all connected sockets except those subscribed to a prefix that matches the message. On SUB sockets, this causes only incoming messages that do not match any of the socket's subscriptions to be received by the user.

Whenever ZMQ_INVERT_MATCHING is set to True on a PUB socket, all SUB sockets connecting to it must also have the option set to 1. Failure to do so will have the SUB sockets reject everything the PUB socket sends them. XSUB sockets do not need to do this because they do not filter incoming messages.

0MQ Socket Option Information

Property	Description
Option value type	bool
Option value unit	True, False
Default value	False
Applicable socket types	PUB, XPUB, SUB

◆ ZMQ_IPV6

const Qore::ZMQ::ZMQ_IPV6 = ZMQ_IPV6

Enable IPv6 on socket.

Set the IPv6 option for the socket. A value of True means IPv6 is enabled on the socket, while False means the socket will use only IPv4. When IPv6 is enabled the socket will connect to, or accept connections from, both IPv4 and IPv6 hosts.

0MQ Socket Option Information

Property	Description
Option value type	bool
Option value unit	True, False
Default value	False
Applicable socket types	all, when using TCP transports.

◆ ZMQ_LINGER

const Qore::ZMQ::ZMQ_LINGER = ZMQ_LINGER

Set linger period for socket shutdown.

The ZMQ_LINGER option shall set the linger period for the specified socket. The linger period determines how long pending messages which have yet to be sent to a peer shall linger in memory after a socket is disconnected and further affects the termination of the socket's context.

he following outlines the different behaviours:

-1: specifies an infinite linger period. Pending messages shall not be discarded after a disconnect or close; attempting to terminate the socket's context shall block until all pending messages have been sent to a peer.
0: specifies no linger period. Pending messages shall be discarded immediately after a disconnect or close.
positive values: specify an upper bound for the linger period in milliseconds. Pending messages shall not be discarded after a disconnect or close; attempting to terminate the socket's context shall block until either all pending messages have been sent to a peer, or the linger period expires, after which any pending messages shall be discarded.

0MQ Socket Option Information

Property	Description
Option value type	int
Option value unit	milliseconds
Default value	30000 (thirty seconds)
Applicable socket types	all

◆ ZMQ_MAXMSGSIZE

const Qore::ZMQ::ZMQ_MAXMSGSIZE = ZMQ_MAXMSGSIZE

Maximum acceptable inbound message size.

Limits the size of the inbound message. If a peer sends a message larger than ZMQ_MAXMSGSIZE it is disconnected. Value of -1 means no limit.

0MQ Socket Option Information

Property	Description
Option value type	int64_t
Option value unit	bytes
Default value	-1
Applicable socket types	all

◆ ZMQ_MULTICAST_HOPS

const Qore::ZMQ::ZMQ_MULTICAST_HOPS = ZMQ_MULTICAST_HOPS

Maximum network hops for multicast packets.

Sets the time-to-live field in every multicast packet sent from this socket. The default is 1 which means that the multicast packets don't leave the local network.

0MQ Socket Option Information

Property	Description
Option value type	int
Option value unit	network hops
Default value	1
Applicable socket types	all, when using multicast transports

◆ ZMQ_MULTICAST_MAXTPDU

const Qore::ZMQ::ZMQ_MULTICAST_MAXTPDU = ZMQ_MULTICAST_MAXTPDU

Maximum transport data unit size for multicast packets.

Sets the maximum transport data unit size used for outbound multicast packets.

This must be set at or below the minimum Maximum Transmission Unit (MTU) for all network paths over which multicast reception is required.

0MQ Socket Option Information

Property	Description
Option value type	int
Option value unit	bytes
Default value	1500
Applicable socket types	all, when using multicast transports

◆ ZMQ_PLAIN_PASSWORD

const Qore::ZMQ::ZMQ_PLAIN_PASSWORD = ZMQ_PLAIN_PASSWORD

Set PLAIN security password.

Sets the password for outgoing connections over TCP or IPC. If you set this to a non-null value, the security mechanism used for connections shall be PLAIN. If you set this to a null value, the security mechanism used for connections shall be NULL.

0MQ Socket Option Information

Property	Description
Option value type	character string
Option value unit	N/A
Default value	not set
Applicable socket types	all, when using TCP transport

◆ ZMQ_PLAIN_SERVER

const Qore::ZMQ::ZMQ_PLAIN_SERVER = ZMQ_PLAIN_SERVER

Set PLAIN server role.

Defines whether the socket will act as server for PLAIN security, see zmq_plain(7). A value of 1 means the socket will act as PLAIN server. A value of 0 means the socket will not act as PLAIN server, and its security role then depends on other option settings. Setting this to 0 shall reset the socket security to NULL.

0MQ Socket Option Information

Property	Description
Option value type	bool
Option value unit	True, False
Default value	False
Applicable socket types	all, when using TCP transport

◆ ZMQ_PLAIN_USERNAME

const Qore::ZMQ::ZMQ_PLAIN_USERNAME = ZMQ_PLAIN_USERNAME

Set PLAIN security username.

Sets the username for outgoing connections over TCP or IPC. If you set this to a non-null value, the security mechanism used for connections shall be PLAIN. If you set this to a null value, the security mechanism used for connections shall be NULL.

0MQ Socket Option Information

Property	Description
Option value type	character string
Option value unit	N/A
Default value	not set
Applicable socket types	all, when using TCP transport

◆ ZMQ_PROBE_ROUTER

const Qore::ZMQ::ZMQ_PROBE_ROUTER = ZMQ_PROBE_ROUTER

bootstrap connections to ROUTER sockets

When set to True, the socket will automatically send an empty message when a new connection is made or accepted. You may set this on ROUTER, DEALER, or ROUTER sockets connected to a ROUTER socket. The application must filter such empty messages. The ZMQ_PROBE_ROUTER option in effect provides the ROUTER application with an event signaling the arrival of a new peer.

0MQ Socket Option Information

Property	Description
Option value type	bool
Option value unit	True, False
Default value	False
Applicable socket types	ROUTER, DEALER, REQ

Note: Do not set this option on a socket that talks to any other socket types: the results are undefined.

◆ ZMQ_RATE

const Qore::ZMQ::ZMQ_RATE = ZMQ_RATE

Set multicast data rate.

The ZMQ_RATE option shall set the maximum send or receive data rate for multicast transports such as zmq_pgm(7) using the specified socket.

0MQ Socket Option Information

Property	Description
Option value type	int
Option value unit	kilobits per second
Default value	100
Applicable socket types	all, when using multicast transports

◆ ZMQ_RCVBUF

const Qore::ZMQ::ZMQ_RCVBUF = ZMQ_RCVBUF

Set kernel receive buffer size.

The ZMQ_RCVBUF option shall set the underlying kernel receive buffer size for the socket to the specified size in bytes. A value of -1 means leave the OS default unchanged. For details refer to your operating system documentation for the SO_RCVBUF socket option.

0MQ Socket Option Information

Property	Description
Option value type	int
Option value unit	bytes
Default value	-1
Applicable socket types	all

◆ ZMQ_RCVHWM

const Qore::ZMQ::ZMQ_RCVHWM = ZMQ_RCVHWM

Set high water mark for inbound messages.

The ZMQ_RCVHWM option shall set the high water mark for inbound messages on the specified socket. The high water mark is a hard limit on the maximum number of outstanding messages ØMQ shall queue in memory for any single peer that the specified socket is communicating with. A value of zero means no limit.

If this limit has been reached the socket shall enter an exceptional state and depending on the socket type, ØMQ shall take appropriate action such as blocking or dropping sent messages. Refer to the individual socket descriptions for details on the exact action taken for each socket type.

0MQ Socket Option Information

Property	Description
Option value type	int
Option value unit	messages
Default value	1000
Applicable socket types	all

◆ ZMQ_RCVTIMEO

const Qore::ZMQ::ZMQ_RCVTIMEO = ZMQ_RCVTIMEO

Maximum time before a recv operation returns with EAGAIN.

Sets the timeout for receive operation on the socket. If the value is 0, a receive operation will return immediately with an EAGAIN error if there is no message to receive. If the value is -1, it will block until a message is available. For all other values, it will wait for a message for that amount of time before returning with an EAGAIN error.

0MQ Socket Option Information

Property	Description
Option value type	int
Option value unit	milliseconds
Default value	-1 (infinite)
Applicable socket types	all

See also

◆ ZMQ_RECONNECT_IVL

const Qore::ZMQ::ZMQ_RECONNECT_IVL = ZMQ_RECONNECT_IVL

Set reconnection interval.

The ZMQ_RECONNECT_IVL option shall set the initial reconnection interval for the specified socket. The reconnection interval is the period ØMQ shall wait between attempts to reconnect disconnected peers when using connection-oriented transports. The value -1 means no reconnection.

The reconnection interval may be randomized by ØMQ to prevent reconnection storms in topologies with a large number of peers per socket.

0MQ Socket Option Information

Property	Description
Option value type	int
Option value unit	milliseconds
Default value	100
Applicable socket types	all, only for connection-oriented transports

◆ ZMQ_RECONNECT_IVL_MAX

const Qore::ZMQ::ZMQ_RECONNECT_IVL_MAX = ZMQ_RECONNECT_IVL_MAX

Set maximum reconnection interval.

The ZMQ_RECONNECT_IVL_MAX option shall set the maximum reconnection interval for the specified socket. This is the maximum period ØMQ shall wait between attempts to reconnect. On each reconnect attempt, the previous interval shall be doubled until ZMQ_RECONNECT_IVL_MAX is reached. This allows for exponential backoff strategy. Default value means no exponential backoff is performed and reconnect interval calculations are only based on ZMQ_RECONNECT_IVL.

Values less than ZMQ_RECONNECT_IVL will be ignored.

0MQ Socket Option Information

Property	Description
Option value type	int
Option value unit	milliseconds
Default value	0 (only use ZMQ_RECONNECT_IVL)
Applicable socket types	all, only for connection-oriented transports

◆ ZMQ_RECOVERY_IVL

const Qore::ZMQ::ZMQ_RECOVERY_IVL = ZMQ_RECOVERY_IVL

Set multicast recovery interval.

The ZMQ_RECOVERY_IVL option shall set the recovery interval for multicast transports using the specified socket. The recovery interval determines the maximum time in milliseconds that a receiver can be absent from a multicast group before unrecoverable data loss will occur.

Exercise care when setting large recovery intervals as the data needed for recovery will be held in memory. For example, a 1 minute recovery interval at a data rate of 1Gbps requires a 7GB in-memory buffer.

0MQ Socket Option Information

Property	Description
Option value type	int
Option value unit	milliseconds
Default value	`10000`
Applicable socket types	all, when using multicast transports

◆ ZMQ_REQ_CORRELATE

const Qore::ZMQ::ZMQ_REQ_CORRELATE = ZMQ_REQ_CORRELATE

match replies with requests

The default behaviour of REQ sockets is to rely on the ordering of messages to match requests and responses and that is usually sufficient. When this option is set to 1, the REQ socket will prefix outgoing messages with an extra frame containing a request id. That means the full message is (request id, 0, user frames…). The REQ socket will discard all incoming messages that don't begin with these two frames.

0MQ Socket Option Information

Property	Description
Option value type	bool
Option value unit	True, False
Default value	False
Applicable socket types	REQ

◆ ZMQ_REQ_RELAXED

const Qore::ZMQ::ZMQ_REQ_RELAXED = ZMQ_REQ_RELAXED

relax strict alternation between request and reply

By default, a REQ socket does not allow initiating a new request with send() until the reply to the previous one has been received. When set to True, sending another message is allowed and previous replies will be discarded if any. The request-reply state machine is reset and a new request is sent to the next available peer.

If set to True, also enable ZMQ_REQ_CORRELATE to ensure correct matching of requests and replies. Otherwise a late reply to an aborted request can be reported as the reply to the superseding request.

0MQ Socket Option Information

Property	Description
Option value type	bool
Option value unit	True, False
Default value	False
Applicable socket types	REQ

◆ ZMQ_ROUTER_HANDOVER

const Qore::ZMQ::ZMQ_ROUTER_HANDOVER = ZMQ_ROUTER_HANDOVER

handle duplicate client identities on ROUTER sockets

If two clients use the same identity when connecting to a ROUTER, the results shall depend on the ZMQ_ROUTER_HANDOVER option setting. If that is not set (or set to the default of zero), the ROUTER socket shall reject clients trying to connect with an already-used identity. If that option is set to True, the ROUTER socket shall hand-over the connection to the new client and disconnect the existing one.

0MQ Socket Option Information

Property	Description
Option value type	bool
Option value unit	True, False
Default value	False
Applicable socket types	ROUTER

◆ ZMQ_ROUTER_MANDATORY

const Qore::ZMQ::ZMQ_ROUTER_MANDATORY = ZMQ_ROUTER_MANDATORY

accept only routable messages on ROUTER sockets

Sets the ROUTER socket behaviour when an unroutable message is encountered. A value of False is the default and discards the message silently when it cannot be routed or the peers SNDHWM is reached. A value of True returns an EHOSTUNREACH error code if the message cannot be routed or EAGAIN error code if the SNDHWM is reached and ZMQ_DONTWAIT was used. Without ZMQ_DONTWAIT it will block until the SNDTIMEO is reached or a spot in the send queue opens up.

0MQ Socket Option Information

Property	Description
Option value type	bool
Option value unit	True, False
Default value	False
Applicable socket types	ROUTER

See also: ZSocketRouter::setMandatory()

◆ ZMQ_SNDBUF

const Qore::ZMQ::ZMQ_SNDBUF = ZMQ_SNDBUF

Set kernel transmit buffer size.

The ZMQ_SNDBUF option shall set the underlying kernel transmit buffer size for the socket to the specified size in bytes. A value of -1 means leave the OS default unchanged. For details please refer to your operating system documentation for the SO_SNDBUF socket option.

0MQ Socket Option Information

Property	Description
Option value type	int
Option value unit	bytes
Default value	-1
Applicable socket types	all

◆ ZMQ_SNDHWM

const Qore::ZMQ::ZMQ_SNDHWM = ZMQ_SNDHWM

Set the high water mark for outbound messages.

If this limit has been reached the socket shall enter an exceptional state and depending on the socket type, ØMQ shall take appropriate action such as blocking or dropping sent messages. Refer to the individual socket descriptions for details on the exact action taken for each socket type.

ØMQ does not guarantee that the socket will accept as many messages as set here, and the actual limit may be as much as 60-70% lower depending on the flow of messages on the socket.

0MQ Socket Option Information

Property	Description
Option value type	int
Option value unit	messages
Default value	1000
Applicable socket types	all

◆ ZMQ_SNDTIMEO

const Qore::ZMQ::ZMQ_SNDTIMEO = ZMQ_SNDTIMEO

Maximum time before a send operation returns with EAGAIN.

Sets the timeout for send operation on the socket. If the value is 0, send operations will return immediately with an EAGAIN error if the message cannot be sent. If the value is -1, it will block until the message is sent. For all other values, it will try to send the message for that amount of time before returning with an EAGAIN error.

0MQ Socket Option Information

Property	Description
Option value type	int
Option value unit	milliseconds
Default value	-1 (infinite)
Applicable socket types	all

See also

◆ ZMQ_SOCKS_PROXY

const Qore::ZMQ::ZMQ_SOCKS_PROXY = ZMQ_SOCKS_PROXY

Set SOCKS5 proxy address.

Sets the SOCKS5 proxy address that shall be used by the socket for the TCP connection(s). Does not support SOCKS5 authentication. If the endpoints are domain names instead of addresses they shall not be resolved and they shall be forwarded unchanged to the SOCKS proxy service in the client connection request message (address type 0x03 domain name).

0MQ Socket Option Information

Property	Description
Option value type	character string
Option value unit	N/A
Default value	not set
Applicable socket types	all, when using TCP transport

◆ ZMQ_STREAM_NOTIFY

const Qore::ZMQ::ZMQ_STREAM_NOTIFY = ZMQ_STREAM_NOTIFY

send connect and disconnect notifications

Enables connect and disconnect notifications on a STREAM socket when set to True. When notifications are enabled, the socket delivers a zero-length message when a peer connects or disconnects.

0MQ Socket Option Information

Property	Description
Option value type	bool
Option value unit	True, False
Default value	False
Applicable socket types	STREAM

◆ ZMQ_SUBSCRIBE

const Qore::ZMQ::ZMQ_SUBSCRIBE = ZMQ_SUBSCRIBE

Establish message filter.

The ZMQ_SUBSCRIBE option shall establish a new message filter on a SUB socket. Newly created SUB sockets shall filter out all incoming messages, therefore you should call this option to establish an initial message filter.

An empty option_value of length zero shall subscribe to all incoming messages. A non-empty option_value shall subscribe to all messages beginning with the specified prefix. Multiple filters may be attached to a single SUB socket, in which case a message shall be accepted if it matches at least one filter.

0MQ Socket Option Information

Property	Description
Option value type	binary data
Option value unit	N/A
Default value	N/A
Applicable socket types	SUB

See also

◆ ZMQ_TCP_KEEPALIVE

const Qore::ZMQ::ZMQ_TCP_KEEPALIVE = ZMQ_TCP_KEEPALIVE

Override SO_KEEPALIVE socket option.

Override SO_KEEPALIVE socket option (where supported by OS). The default value of -1 means to skip any overrides and leave it to OS default.

0MQ Socket Option Information

Property	Description
Option value type	int
Option value unit	-1,0,1
Default value	-1 (leave to OS default)
Applicable socket types	all, when using TCP transports.

◆ ZMQ_TCP_KEEPALIVE_CNT

const Qore::ZMQ::ZMQ_TCP_KEEPALIVE_CNT = ZMQ_TCP_KEEPALIVE_CNT

Override TCP_KEEPCNT socket option.

Override TCP_KEEPCNT socket option (where supported by OS). The default value of -1 means to skip any overrides and leave it to OS default.

0MQ Socket Option Information

Property	Description
Option value type	int
Option value unit	-1,>0
Default value	-1 (leave to OS default)
Applicable socket types	all, when using TCP transports.

◆ ZMQ_TCP_KEEPALIVE_IDLE

const Qore::ZMQ::ZMQ_TCP_KEEPALIVE_IDLE = ZMQ_TCP_KEEPALIVE_IDLE

Override TCP_KEEPIDLE (or TCP_KEEPALIVE on some OSes)

Override TCP_KEEPIDLE (or TCP_KEEPALIVE on some OSes) socket option (where supported by OS). The default value of -1 means to skip any overrides and leave it to OS default.

0MQ Socket Option Information

Property	Description
Option value type	int
Option value unit	-1,>0
Default value	-1 (leave to OS default)
Applicable socket types	all, when using TCP transports.

◆ ZMQ_TCP_KEEPALIVE_INTVL

const Qore::ZMQ::ZMQ_TCP_KEEPALIVE_INTVL = ZMQ_TCP_KEEPALIVE_INTVL

Override TCP_KEEPINTVL socket option.

Override TCP_KEEPINTVL socket option(where supported by OS). The default value of -1 means to skip any overrides and leave it to OS default.

0MQ Socket Option Information

Property	Description
Option value type	int
Option value unit	-1,>0
Default value	-1 (leave to OS default)
Applicable socket types	all, when using TCP transports.

◆ ZMQ_TCP_MAXRT

const Qore::ZMQ::ZMQ_TCP_MAXRT = ZMQ_TCP_MAXRT

Set TCP Maximum Retransmit Timeout.

On OSes where it is supported, sets how long before an unacknowledged TCP retransmit times out. The system normally attempts many TCP retransmits following an exponential backoff strategy. This means that after a network outage, it may take a long time before the session can be re-established. Setting this option allows the timeout to happen at a shorter interval.

0MQ Socket Option Information

Property	Description
Option value type	int
Option value unit	milliseconds
Default value	0 (leave to OS default)
Applicable socket types	all, when using TCP transports.

◆ ZMQ_TOS

const Qore::ZMQ::ZMQ_TOS = ZMQ_TOS

Set the Type-of-Service on socket.

Sets the ToS fields (Differentiated services (DS) and Explicit Congestion Notification (ECN) field of the IP header. The ToS field is typically used to specify a packets priority. The availability of this option is dependent on intermediate network equipment that inspect the ToS field and provide a path for low-delay, high-throughput, highly-reliable service, etc.

0MQ Socket Option Information

Property	Description
Option value type	int
Option value unit	>0
Default value	0
Applicable socket types	all, only for connection-oriented transports

◆ ZMQ_UNSUBSCRIBE

const Qore::ZMQ::ZMQ_UNSUBSCRIBE = ZMQ_UNSUBSCRIBE

Remove message filter.

The ZMQ_UNSUBSCRIBE option shall remove an existing message filter on a SUB socket. The filter specified must match an existing filter previously established with the ZMQ_SUBSCRIBE option. If the socket has several instances of the same filter attached the ZMQ_UNSUBSCRIBE option shall remove only one instance, leaving the rest in place and functional.

0MQ Socket Option Information

Property	Description
Option value type	binary data
Option value unit	N/A
Default value	N/A
Applicable socket types	SUB

See also

ZMQ_SUBSCRIBE
ZSocketSub::subcribe()
ZSocketSub::unsubscribe()

◆ ZMQ_XPUB_MANUAL

const Qore::ZMQ::ZMQ_XPUB_MANUAL = ZMQ_XPUB_MANUAL

change the subscription handling to manual

Sets the XPUB socket subscription handling mode manual/automatic. A value of False is the default and subscription requests will be handled automatically. A value of True will change the subscription requests handling to manual, with manual mode subscription requests are not added to the subscription list. To add subscription the user needs to set the subscription on the socket manually by setting the ZMQ_SUBSCRIBE option on the XPUB socket with ZSocket::setOption().

0MQ Socket Option Information

Property	Description
Option value type	bool
Option value unit	True, False
Default value	False
Applicable socket types	XPUB

◆ ZMQ_XPUB_NODROP

const Qore::ZMQ::ZMQ_XPUB_NODROP = ZMQ_XPUB_NODROP

do not silently drop messages if SENDHWM is reached

Sets the XPUB socket behaviour to return error EAGAIN if SENDHWM is reached and the message could not be sent.

A value of False is the default and drops the message silently when the peer's SNDHWM is reached. A value of True returns an EAGAIN error code if the SNDHWM is reached and ZMQ_DONTWAIT was used.

0MQ Socket Option Information

Property	Description
Option value type	bool
Option value unit	True, False
Default value	False
Applicable socket types	XPUB, PUB

◆ ZMQ_XPUB_VERBOSE

const Qore::ZMQ::ZMQ_XPUB_VERBOSE = ZMQ_XPUB_VERBOSE

pass subscribe messages on an XPUB socket

Sets the XPUB socket behaviour on new subscriptions. If enabled, the socket passes all subscribe messages to the caller. If disabled, these are not visible to the caller. The default is False (disabled).

0MQ Socket Option Information

Property	Description
Option value type	bool
Option value unit	True, False
Default value	False
Applicable socket types	XPUB

◆ ZMQ_XPUB_VERBOSER

const Qore::ZMQ::ZMQ_XPUB_VERBOSER = ZMQ_XPUB_VERBOSER

pass subscribe and unsubscribe messages on XPUB socket

Sets the XPUB socket behaviour on new subscriptions and ubsubscriptions. If enabled, the socket passes all subscribe and unsubscribe messages to the caller. If disabled, these are not visible to the caller. The default is False (disabled).

0MQ Socket Option Information

Property	Description
Option value type	bool
Option value unit	True, False
Default value	False
Applicable socket types	XPUB

◆ ZMQ_XPUB_WELCOME_MSG

const Qore::ZMQ::ZMQ_XPUB_WELCOME_MSG = ZMQ_XPUB_WELCOME_MSG

Set welcome message that will be received by subscriber when connecting.

Sets a welcome message the will be recieved by subscriber when connecting.

The subscriber must subscribe to the welcome message before connecting.

Welcome message will also be sent on reconnecting. For the welcome message to work well, the user must poll on incoming subscription messages on the XPUB socket and handle them.

Use NULL and length of zero to disable the welcome message.

0MQ Socket Option Information

Property	Description
Option value type	binary data
Option value unit	N/A
Default value	NULL
Applicable socket types	XPUB

◆ ZMQ_ZAP_DOMAIN

const Qore::ZMQ::ZMQ_ZAP_DOMAIN = ZMQ_ZAP_DOMAIN

Set RFC 27 authentication domain.

Sets the domain for ZAP (ZMQ RFC 27) authentication. For NULL security (the default on all tcp:// connections), ZAP authentication only happens if you set a non-empty domain.

For PLAIN and CURVE security, ZAP requests are always made, if there is a ZAP handler present. See http://rfc.zeromq.org/spec:27 for more details.

0MQ Socket Option Information

Property	Description
Option value type	character string
Option value unit	N/A
Default value	not set
Applicable socket types	all, when using TCP transport

Variables

Detailed Description

Variable Documentation

◆ ZMQ_AFFINITY

◆ ZMQ_BACKLOG

◆ ZMQ_CONFLATE

◆ ZMQ_CONNECT_RID

◆ ZMQ_CONNECT_TIMEOUT

◆ ZMQ_CURVE_PUBLICKEY

◆ ZMQ_CURVE_SECRETKEY

◆ ZMQ_CURVE_SERVER

◆ ZMQ_CURVE_SERVERKEY

◆ ZMQ_GSSAPI_PLAINTEXT

◆ ZMQ_GSSAPI_PRINCIPAL

◆ ZMQ_GSSAPI_SERVER

◆ ZMQ_GSSAPI_SERVICE_PRINCIPAL

◆ ZMQ_HANDSHAKE_IVL

◆ ZMQ_HEARTBEAT_IVL

◆ ZMQ_HEARTBEAT_TIMEOUT

◆ ZMQ_HEARTBEAT_TTL

◆ ZMQ_IDENTITY

◆ ZMQ_IMMEDIATE

◆ ZMQ_INVERT_MATCHING

◆ ZMQ_IPV6

◆ ZMQ_LINGER

◆ ZMQ_MAXMSGSIZE

◆ ZMQ_MULTICAST_HOPS

◆ ZMQ_MULTICAST_MAXTPDU

◆ ZMQ_PLAIN_PASSWORD

◆ ZMQ_PLAIN_SERVER

◆ ZMQ_PLAIN_USERNAME

◆ ZMQ_PROBE_ROUTER

◆ ZMQ_RATE

◆ ZMQ_RCVBUF

◆ ZMQ_RCVHWM

◆ ZMQ_RCVTIMEO

◆ ZMQ_RECONNECT_IVL

◆ ZMQ_RECONNECT_IVL_MAX

◆ ZMQ_RECOVERY_IVL

◆ ZMQ_REQ_CORRELATE

◆ ZMQ_REQ_RELAXED

◆ ZMQ_ROUTER_HANDOVER

◆ ZMQ_ROUTER_MANDATORY

◆ ZMQ_SNDBUF

◆ ZMQ_SNDHWM

◆ ZMQ_SNDTIMEO

◆ ZMQ_SOCKS_PROXY

◆ ZMQ_STREAM_NOTIFY

◆ ZMQ_SUBSCRIBE

◆ ZMQ_TCP_KEEPALIVE

◆ ZMQ_TCP_KEEPALIVE_CNT

◆ ZMQ_TCP_KEEPALIVE_IDLE

◆ ZMQ_TCP_KEEPALIVE_INTVL

◆ ZMQ_TCP_MAXRT

◆ ZMQ_TOS

◆ ZMQ_UNSUBSCRIBE

◆ ZMQ_XPUB_MANUAL

◆ ZMQ_XPUB_NODROP

◆ ZMQ_XPUB_VERBOSE

◆ ZMQ_XPUB_VERBOSER

◆ ZMQ_XPUB_WELCOME_MSG

◆ ZMQ_ZAP_DOMAIN