ZSOCK(3)

NAME
zsock - Class for high-level socket API that hides libzmq contexts and sockets

SYNOPSIS

//  This is a stable class, and may not change except for emergencies. It
//  is provided in stable builds.
//  This class has draft methods, which may change over time. They are not
//  in stable releases, by default. Use --enable-drafts to enable.
//  Create a new socket. Returns the new socket, or NULL if the new socket
//  could not be created. Note that the symbol zsock_new (and other
//  constructors/destructors for zsock) are redirected to the *_checked
//  variant, enabling intelligent socket leak detection. This can have
//  performance implications if you use a LOT of sockets. To turn off this
//  redirection behaviour, define ZSOCK_NOCHECK.
CZMQ_EXPORT zsock_t *
    zsock_new (int type);
//  Create a PUB socket. Default action is bind.
CZMQ_EXPORT zsock_t *
    zsock_new_pub (const char *endpoint);
//  Create a SUB socket, and optionally subscribe to some prefix string. Default
//  action is connect.
CZMQ_EXPORT zsock_t *
    zsock_new_sub (const char *endpoint, const char *subscribe);
//  Create a REQ socket. Default action is connect.
CZMQ_EXPORT zsock_t *
    zsock_new_req (const char *endpoint);
//  Create a REP socket. Default action is bind.
CZMQ_EXPORT zsock_t *
    zsock_new_rep (const char *endpoint);
//  Create a DEALER socket. Default action is connect.
CZMQ_EXPORT zsock_t *
    zsock_new_dealer (const char *endpoint);
//  Create a ROUTER socket. Default action is bind.
CZMQ_EXPORT zsock_t *
    zsock_new_router (const char *endpoint);
//  Create a PUSH socket. Default action is connect.
CZMQ_EXPORT zsock_t *
    zsock_new_push (const char *endpoint);
//  Create a PULL socket. Default action is bind.
CZMQ_EXPORT zsock_t *
    zsock_new_pull (const char *endpoint);
//  Create an XPUB socket. Default action is bind.
CZMQ_EXPORT zsock_t *
    zsock_new_xpub (const char *endpoint);
//  Create an XSUB socket. Default action is connect.
CZMQ_EXPORT zsock_t *
    zsock_new_xsub (const char *endpoint);
//  Create a PAIR socket. Default action is connect.
CZMQ_EXPORT zsock_t *
    zsock_new_pair (const char *endpoint);
//  Create a STREAM socket. Default action is connect.
CZMQ_EXPORT zsock_t *
    zsock_new_stream (const char *endpoint);
//  Destroy the socket. You must use this for any socket created via the
//  zsock_new method.
CZMQ_EXPORT void
    zsock_destroy (zsock_t **self_p);
//  Bind a socket to a formatted endpoint. For tcp:// endpoints, supports
//  ephemeral ports, if you specify the port number as "*". By default
//  zsock uses the IANA designated range from C000 (49152) to FFFF (65535).
//  To override this range, follow the "*" with "[first-last]". Either or
//  both first and last may be empty. To bind to a random port within the
//  range, use "!" in place of "*".
//
//  Examples:
//      tcp://127.0.0.1:*           bind to first free port from C000 up
//      tcp://127.0.0.1:!           bind to random port from C000 to FFFF
//      tcp://127.0.0.1:*[60000-]   bind to first free port from 60000 up
//      tcp://127.0.0.1:![-60000]   bind to random port from C000 to 60000
//      tcp://127.0.0.1:![55000-55999]
//                                  bind to random port from 55000 to 55999
//
//  On success, returns the actual port number used, for tcp:// endpoints,
//  and 0 for other transports. On failure, returns -1. Note that when using
//  ephemeral ports, a port may be reused by different services without
//  clients being aware. Protocols that run on ephemeral ports should take
//  this into account.
CZMQ_EXPORT int
    zsock_bind (zsock_t *self, const char *format, ...) CHECK_PRINTF (2);
//  Returns last bound endpoint, if any.
CZMQ_EXPORT const char *
    zsock_endpoint (zsock_t *self);
//  Unbind a socket from a formatted endpoint.
//  Returns 0 if OK, -1 if the endpoint was invalid or the function
//  isn't supported.
CZMQ_EXPORT int
    zsock_unbind (zsock_t *self, const char *format, ...) CHECK_PRINTF (2);
//  Connect a socket to a formatted endpoint
//  Returns 0 if OK, -1 if the endpoint was invalid.
CZMQ_EXPORT int
    zsock_connect (zsock_t *self, const char *format, ...) CHECK_PRINTF (2);
//  Disconnect a socket from a formatted endpoint
//  Returns 0 if OK, -1 if the endpoint was invalid or the function
//  isn't supported.
CZMQ_EXPORT int
    zsock_disconnect (zsock_t *self, const char *format, ...) CHECK_PRINTF (2);
//  Attach a socket to zero or more endpoints. If endpoints is not null,
//  parses as list of ZeroMQ endpoints, separated by commas, and prefixed by
//  '@' (to bind the socket) or '>' (to connect the socket). Returns 0 if all
//  endpoints were valid, or -1 if there was a syntax error. If the endpoint
//  does not start with '@' or '>', the serverish argument defines whether
//  it is used to bind (serverish = true) or connect (serverish = false).
CZMQ_EXPORT int
    zsock_attach (zsock_t *self, const char *endpoints, bool serverish);
//  Returns socket type as printable constant string.
CZMQ_EXPORT const char *
    zsock_type_str (zsock_t *self);
//  Send a 'picture' message to the socket (or actor). The picture is a
//  string that defines the type of each frame. This makes it easy to send
//  a complex multiframe message in one call. The picture can contain any
//  of these characters, each corresponding to one or two arguments:
//
//      i = int (signed)
//      1 = uint8_t
//      2 = uint16_t
//      4 = uint32_t
//      8 = uint64_t
//      s = char *
//      b = byte *, size_t (2 arguments)
//      c = zchunk_t *
//      f = zframe_t *
//      h = zhashx_t *
//      l = zlistx_t * (DRAFT)
//      U = zuuid_t *
//      p = void * (sends the pointer value, only meaningful over inproc)
//      m = zmsg_t * (sends all frames in the zmsg)
//      z = sends zero-sized frame (0 arguments)
//      u = uint (deprecated)
//
//  Note that s, b, c, and f are encoded the same way and the choice is
//  offered as a convenience to the sender, which may or may not already
//  have data in a zchunk or zframe. Does not change or take ownership of
//  any arguments. Returns 0 if successful, -1 if sending failed for any
//  reason.
CZMQ_EXPORT int
    zsock_send (void *self, const char *picture, ...);
//  Send a 'picture' message to the socket (or actor). This is a va_list
//  version of zsock_send (), so please consult its documentation for the
//  details.
CZMQ_EXPORT int
    zsock_vsend (void *self, const char *picture, va_list argptr);
//  Receive a 'picture' message to the socket (or actor). See zsock_send for
//  the format and meaning of the picture. Returns the picture elements into
//  a series of pointers as provided by the caller:
//
//      i = int * (stores signed integer)
//      4 = uint32_t * (stores 32-bit unsigned integer)
//      8 = uint64_t * (stores 64-bit unsigned integer)
//      s = char ** (allocates new string)
//      b = byte **, size_t * (2 arguments) (allocates memory)
//      c = zchunk_t ** (creates zchunk)
//      f = zframe_t ** (creates zframe)
//      U = zuuid_t * (creates a zuuid with the data)
//      h = zhashx_t ** (creates zhashx)
//      l = zlistx_t ** (creates zlistx) (DRAFT)
//      p = void ** (stores pointer)
//      m = zmsg_t ** (creates a zmsg with the remaining frames)
//      z = null, asserts empty frame (0 arguments)
//      u = uint * (stores unsigned integer, deprecated)
//
//  Note that zsock_recv creates the returned objects, and the caller must
//  destroy them when finished with them. The supplied pointers do not need
//  to be initialized. Returns 0 if successful, or -1 if it failed to recv
//  a message, in which case the pointers are not modified. When message
//  frames are truncated (a short message), sets return values to zero/null.
//  If an argument pointer is NULL, does not store any value (skips it).
//  An 'n' picture matches an empty frame; if the message does not match,
//  the method will return -1.
CZMQ_EXPORT int
    zsock_recv (void *self, const char *picture, ...);
//  Receive a 'picture' message from the socket (or actor). This is a
//  va_list version of zsock_recv (), so please consult its documentation
//  for the details.
CZMQ_EXPORT int
    zsock_vrecv (void *self, const char *picture, va_list argptr);
//  Send a binary encoded 'picture' message to the socket (or actor). This
//  method is similar to zsock_send, except the arguments are encoded in a
//  binary format that is compatible with zproto, and is designed to reduce
//  memory allocations. The pattern argument is a string that defines the
//  type of each argument. Supports these argument types:
//
//   pattern    C type                  zproto type:
//      1       uint8_t                 type = "number" size = "1"
//      2       uint16_t                type = "number" size = "2"
//      4       uint32_t                type = "number" size = "3"
//      8       uint64_t                type = "number" size = "4"
//      s       char *, 0-255 chars     type = "string"
//      S       char *, 0-2^32-1 chars  type = "longstr"
//      c       zchunk_t *              type = "chunk"
//      f       zframe_t *              type = "frame"
//      u       zuuid_t *               type = "uuid"
//      m       zmsg_t *                type = "msg"
//      p       void *, sends pointer value, only over inproc
//
//  Does not change or take ownership of any arguments. Returns 0 if
//  successful, -1 if sending failed for any reason.
CZMQ_EXPORT int
    zsock_bsend (void *self, const char *picture, ...);
//  Receive a binary encoded 'picture' message from the socket (or actor).
//  This method is similar to zsock_recv, except the arguments are encoded
//  in a binary format that is compatible with zproto, and is designed to
//  reduce memory allocations. The pattern argument is a string that defines
//  the type of each argument. See zsock_bsend for the supported argument
//  types. All arguments must be pointers; this call sets them to point to
//  values held on a per-socket basis.
//  For types 1, 2, 4 and 8 the caller must allocate the memory itself before
//  calling zsock_brecv.
//  For types S, the caller must free the value once finished with it, as
//  zsock_brecv will allocate the buffer.
//  For type s, the caller must not free the value as it is stored in a
//  local cache for performance purposes.
//  For types c, f, u and m the caller must call the appropriate destructor
//  depending on the object as zsock_brecv will create new objects.
//  For type p the caller must coordinate with the sender, as it is just a
//  pointer value being passed.
CZMQ_EXPORT int
    zsock_brecv (void *self, const char *picture, ...);
//  Set socket to use unbounded pipes (HWM=0); use this in cases when you are
//  totally certain the message volume can fit in memory. This method works
//  across all versions of ZeroMQ. Takes a polymorphic socket reference.
CZMQ_EXPORT void
    zsock_set_unbounded (void *self);
//  Send a signal over a socket. A signal is a short message carrying a
//  success/failure code (by convention, 0 means OK). Signals are encoded
//  to be distinguishable from "normal" messages. Accepts a zsock_t or a
//  zactor_t argument, and returns 0 if successful, -1 if the signal could
//  not be sent. Takes a polymorphic socket reference.
CZMQ_EXPORT int
    zsock_signal (void *self, byte status);
//  Wait on a signal. Use this to coordinate between threads, over pipe
//  pairs. Blocks until the signal is received. Returns -1 on error, 0 or
//  greater on success. Accepts a zsock_t or a zactor_t as argument.
//  Takes a polymorphic socket reference.
CZMQ_EXPORT int
    zsock_wait (void *self);
//  If there is a partial message still waiting on the socket, remove and
//  discard it. This is useful when reading partial messages, to get specific
//  message types.
CZMQ_EXPORT void
    zsock_flush (void *self);
//  Probe the supplied object, and report if it looks like a zsock_t.
//  Takes a polymorphic socket reference.
CZMQ_EXPORT bool
    zsock_is (void *self);
//  Probe the supplied reference. If it looks like a zsock_t instance, return
//  the underlying libzmq socket handle; else if it looks like a file
//  descriptor, return NULL; else if it looks like a libzmq socket handle,
//  return the supplied value. Takes a polymorphic socket reference.
CZMQ_EXPORT void *
    zsock_resolve (void *self);
//  Get socket option `priority`.
//  Available from libzmq 4.3.0.
//  Caller owns return value and must destroy it when done.
CZMQ_EXPORT int
    zsock_priority (void *self);
//  Set socket option `priority`.
//  Available from libzmq 4.3.0.
CZMQ_EXPORT void
    zsock_set_priority (void *self, int priority);
//  Get socket option `reconnect_stop`.
//  Available from libzmq 4.3.0.
//  Caller owns return value and must destroy it when done.
CZMQ_EXPORT int
    zsock_reconnect_stop (void *self);
//  Set socket option `reconnect_stop`.
//  Available from libzmq 4.3.0.
CZMQ_EXPORT void
    zsock_set_reconnect_stop (void *self, int reconnect_stop);
//  Set socket option `only_first_subscribe`.
//  Available from libzmq 4.3.0.
CZMQ_EXPORT void
    zsock_set_only_first_subscribe (void *self, int only_first_subscribe);
//  Set socket option `hello_msg`.
//  Available from libzmq 4.3.0.
CZMQ_EXPORT void
    zsock_set_hello_msg (void *self, zframe_t *hello_msg);
//  Set socket option `disconnect_msg`.
//  Available from libzmq 4.3.0.
CZMQ_EXPORT void
    zsock_set_disconnect_msg (void *self, zframe_t *disconnect_msg);
//  Set socket option `wss_trust_system`.
//  Available from libzmq 4.3.0.
CZMQ_EXPORT void
    zsock_set_wss_trust_system (void *self, int wss_trust_system);
//  Set socket option `wss_hostname`.
//  Available from libzmq 4.3.0.
CZMQ_EXPORT void
    zsock_set_wss_hostname (void *self, const char *wss_hostname);
//  Set socket option `wss_trust_pem`.
//  Available from libzmq 4.3.0.
CZMQ_EXPORT void
    zsock_set_wss_trust_pem (void *self, const char *wss_trust_pem);
//  Set socket option `wss_cert_pem`.
//  Available from libzmq 4.3.0.
CZMQ_EXPORT void
    zsock_set_wss_cert_pem (void *self, const char *wss_cert_pem);
//  Set socket option `wss_key_pem`.
//  Available from libzmq 4.3.0.
CZMQ_EXPORT void
    zsock_set_wss_key_pem (void *self, const char *wss_key_pem);
//  Get socket option `out_batch_size`.
//  Available from libzmq 4.3.0.
//  Caller owns return value and must destroy it when done.
CZMQ_EXPORT int
    zsock_out_batch_size (void *self);
//  Set socket option `out_batch_size`.
//  Available from libzmq 4.3.0.
CZMQ_EXPORT void
    zsock_set_out_batch_size (void *self, int out_batch_size);
//  Get socket option `in_batch_size`.
//  Available from libzmq 4.3.0.
//  Caller owns return value and must destroy it when done.
CZMQ_EXPORT int
    zsock_in_batch_size (void *self);
//  Set socket option `in_batch_size`.
//  Available from libzmq 4.3.0.
CZMQ_EXPORT void
    zsock_set_in_batch_size (void *self, int in_batch_size);
//  Get socket option `socks_password`.
//  Available from libzmq 4.3.0.
//  Caller owns return value and must destroy it when done.
CZMQ_EXPORT char *
    zsock_socks_password (void *self);
//  Set socket option `socks_password`.
//  Available from libzmq 4.3.0.
CZMQ_EXPORT void
    zsock_set_socks_password (void *self, const char *socks_password);
//  Get socket option `socks_username`.
//  Available from libzmq 4.3.0.
//  Caller owns return value and must destroy it when done.
CZMQ_EXPORT char *
    zsock_socks_username (void *self);
//  Set socket option `socks_username`.
//  Available from libzmq 4.3.0.
CZMQ_EXPORT void
    zsock_set_socks_username (void *self, const char *socks_username);
//  Set socket option `xpub_manual_last_value`.
//  Available from libzmq 4.3.0.
CZMQ_EXPORT void
    zsock_set_xpub_manual_last_value (void *self, int xpub_manual_last_value);
//  Get socket option `router_notify`.
//  Available from libzmq 4.3.0.
//  Caller owns return value and must destroy it when done.
CZMQ_EXPORT int
    zsock_router_notify (void *self);
//  Set socket option `router_notify`.
//  Available from libzmq 4.3.0.
CZMQ_EXPORT void
    zsock_set_router_notify (void *self, int router_notify);
//  Get socket option `multicast_loop`.
//  Available from libzmq 4.3.0.
//  Caller owns return value and must destroy it when done.
CZMQ_EXPORT int
    zsock_multicast_loop (void *self);
//  Set socket option `multicast_loop`.
//  Available from libzmq 4.3.0.
CZMQ_EXPORT void
    zsock_set_multicast_loop (void *self, int multicast_loop);
//  Get socket option `metadata`.
//  Available from libzmq 4.3.0.
//  Caller owns return value and must destroy it when done.
CZMQ_EXPORT char *
    zsock_metadata (void *self);
//  Set socket option `metadata`.
//  Available from libzmq 4.3.0.
CZMQ_EXPORT void
    zsock_set_metadata (void *self, const char *metadata);
//  Get socket option `loopback_fastpath`.
//  Available from libzmq 4.3.0.
//  Caller owns return value and must destroy it when done.
CZMQ_EXPORT int
    zsock_loopback_fastpath (void *self);
//  Set socket option `loopback_fastpath`.
//  Available from libzmq 4.3.0.
CZMQ_EXPORT void
    zsock_set_loopback_fastpath (void *self, int loopback_fastpath);
//  Get socket option `zap_enforce_domain`.
//  Available from libzmq 4.3.0.
//  Caller owns return value and must destroy it when done.
CZMQ_EXPORT int
    zsock_zap_enforce_domain (void *self);
//  Set socket option `zap_enforce_domain`.
//  Available from libzmq 4.3.0.
CZMQ_EXPORT void
    zsock_set_zap_enforce_domain (void *self, int zap_enforce_domain);
//  Get socket option `gssapi_principal_nametype`.
//  Available from libzmq 4.3.0.
//  Caller owns return value and must destroy it when done.
CZMQ_EXPORT int
    zsock_gssapi_principal_nametype (void *self);
//  Set socket option `gssapi_principal_nametype`.
//  Available from libzmq 4.3.0.
CZMQ_EXPORT void
    zsock_set_gssapi_principal_nametype (void *self, int gssapi_principal_nametype);
//  Get socket option `gssapi_service_principal_nametype`.
//  Available from libzmq 4.3.0.
//  Caller owns return value and must destroy it when done.
CZMQ_EXPORT int
    zsock_gssapi_service_principal_nametype (void *self);
//  Set socket option `gssapi_service_principal_nametype`.
//  Available from libzmq 4.3.0.
CZMQ_EXPORT void
    zsock_set_gssapi_service_principal_nametype (void *self, int gssapi_service_principal_nametype);
//  Get socket option `bindtodevice`.
//  Available from libzmq 4.3.0.
//  Caller owns return value and must destroy it when done.
CZMQ_EXPORT char *
    zsock_bindtodevice (void *self);
//  Set socket option `bindtodevice`.
//  Available from libzmq 4.3.0.
CZMQ_EXPORT void
    zsock_set_bindtodevice (void *self, const char *bindtodevice);
//  Get socket option `heartbeat_ivl`.
//  Available from libzmq 4.2.0.
//  Caller owns return value and must destroy it when done.
CZMQ_EXPORT int
    zsock_heartbeat_ivl (void *self);
//  Set socket option `heartbeat_ivl`.
//  Available from libzmq 4.2.0.
CZMQ_EXPORT void
    zsock_set_heartbeat_ivl (void *self, int heartbeat_ivl);
//  Get socket option `heartbeat_ttl`.
//  Available from libzmq 4.2.0.
//  Caller owns return value and must destroy it when done.
CZMQ_EXPORT int
    zsock_heartbeat_ttl (void *self);
//  Set socket option `heartbeat_ttl`.
//  Available from libzmq 4.2.0.
CZMQ_EXPORT void
    zsock_set_heartbeat_ttl (void *self, int heartbeat_ttl);
//  Get socket option `heartbeat_timeout`.
//  Available from libzmq 4.2.0.
//  Caller owns return value and must destroy it when done.
CZMQ_EXPORT int
    zsock_heartbeat_timeout (void *self);
//  Set socket option `heartbeat_timeout`.
//  Available from libzmq 4.2.0.
CZMQ_EXPORT void
    zsock_set_heartbeat_timeout (void *self, int heartbeat_timeout);
//  Get socket option `use_fd`.
//  Available from libzmq 4.2.0.
//  Caller owns return value and must destroy it when done.
CZMQ_EXPORT int
    zsock_use_fd (void *self);
//  Set socket option `use_fd`.
//  Available from libzmq 4.2.0.
CZMQ_EXPORT void
    zsock_set_use_fd (void *self, int use_fd);
//  Set socket option `xpub_manual`.
//  Available from libzmq 4.2.0.
CZMQ_EXPORT void
    zsock_set_xpub_manual (void *self, int xpub_manual);
//  Set socket option `xpub_welcome_msg`.
//  Available from libzmq 4.2.0.
CZMQ_EXPORT void
    zsock_set_xpub_welcome_msg (void *self, const char *xpub_welcome_msg);
//  Set socket option `stream_notify`.
//  Available from libzmq 4.2.0.
CZMQ_EXPORT void
    zsock_set_stream_notify (void *self, int stream_notify);
//  Get socket option `invert_matching`.
//  Available from libzmq 4.2.0.
//  Caller owns return value and must destroy it when done.
CZMQ_EXPORT int
    zsock_invert_matching (void *self);
//  Set socket option `invert_matching`.
//  Available from libzmq 4.2.0.
CZMQ_EXPORT void
    zsock_set_invert_matching (void *self, int invert_matching);
//  Set socket option `xpub_verboser`.
//  Available from libzmq 4.2.0.
CZMQ_EXPORT void
    zsock_set_xpub_verboser (void *self, int xpub_verboser);
//  Get socket option `connect_timeout`.
//  Available from libzmq 4.2.0.
//  Caller owns return value and must destroy it when done.
CZMQ_EXPORT int
    zsock_connect_timeout (void *self);
//  Set socket option `connect_timeout`.
//  Available from libzmq 4.2.0.
CZMQ_EXPORT void
    zsock_set_connect_timeout (void *self, int connect_timeout);
//  Get socket option `tcp_maxrt`.
//  Available from libzmq 4.2.0.
//  Caller owns return value and must destroy it when done.
CZMQ_EXPORT int
    zsock_tcp_maxrt (void *self);
//  Set socket option `tcp_maxrt`.
//  Available from libzmq 4.2.0.
CZMQ_EXPORT void
    zsock_set_tcp_maxrt (void *self, int tcp_maxrt);
//  Get socket option `thread_safe`.
//  Available from libzmq 4.2.0.
//  Caller owns return value and must destroy it when done.
CZMQ_EXPORT int
    zsock_thread_safe (void *self);
//  Get socket option `multicast_maxtpdu`.
//  Available from libzmq 4.2.0.
//  Caller owns return value and must destroy it when done.
CZMQ_EXPORT int
    zsock_multicast_maxtpdu (void *self);
//  Set socket option `multicast_maxtpdu`.
//  Available from libzmq 4.2.0.
CZMQ_EXPORT void
    zsock_set_multicast_maxtpdu (void *self, int multicast_maxtpdu);
//  Get socket option `vmci_buffer_size`.
//  Available from libzmq 4.2.0.
//  Caller owns return value and must destroy it when done.
CZMQ_EXPORT int
    zsock_vmci_buffer_size (void *self);
//  Set socket option `vmci_buffer_size`.
//  Available from libzmq 4.2.0.
CZMQ_EXPORT void
    zsock_set_vmci_buffer_size (void *self, int vmci_buffer_size);
//  Get socket option `vmci_buffer_min_size`.
//  Available from libzmq 4.2.0.
//  Caller owns return value and must destroy it when done.
CZMQ_EXPORT int
    zsock_vmci_buffer_min_size (void *self);
//  Set socket option `vmci_buffer_min_size`.
//  Available from libzmq 4.2.0.
CZMQ_EXPORT void
    zsock_set_vmci_buffer_min_size (void *self, int vmci_buffer_min_size);
//  Get socket option `vmci_buffer_max_size`.
//  Available from libzmq 4.2.0.
//  Caller owns return value and must destroy it when done.
CZMQ_EXPORT int
    zsock_vmci_buffer_max_size (void *self);
//  Set socket option `vmci_buffer_max_size`.
//  Available from libzmq 4.2.0.
CZMQ_EXPORT void
    zsock_set_vmci_buffer_max_size (void *self, int vmci_buffer_max_size);
//  Get socket option `vmci_connect_timeout`.
//  Available from libzmq 4.2.0.
//  Caller owns return value and must destroy it when done.
CZMQ_EXPORT int
    zsock_vmci_connect_timeout (void *self);
//  Set socket option `vmci_connect_timeout`.
//  Available from libzmq 4.2.0.
CZMQ_EXPORT void
    zsock_set_vmci_connect_timeout (void *self, int vmci_connect_timeout);
//  Get socket option `tos`.
//  Available from libzmq 4.1.0.
//  Caller owns return value and must destroy it when done.
CZMQ_EXPORT int
    zsock_tos (void *self);
//  Set socket option `tos`.
//  Available from libzmq 4.1.0.
CZMQ_EXPORT void
    zsock_set_tos (void *self, int tos);
//  Set socket option `router_handover`.
//  Available from libzmq 4.1.0.
CZMQ_EXPORT void
    zsock_set_router_handover (void *self, int router_handover);
//  Set socket option `connect_rid`.
//  Available from libzmq 4.1.0.
CZMQ_EXPORT void
    zsock_set_connect_rid (void *self, const char *connect_rid);
//  Set socket option `connect_rid` from 32-octet binary
//  Available from libzmq 4.1.0.
CZMQ_EXPORT void
    zsock_set_connect_rid_bin (void *self, const byte *connect_rid);
//  Get socket option `handshake_ivl`.
//  Available from libzmq 4.1.0.
//  Caller owns return value and must destroy it when done.
CZMQ_EXPORT int
    zsock_handshake_ivl (void *self);
//  Set socket option `handshake_ivl`.
//  Available from libzmq 4.1.0.
CZMQ_EXPORT void
    zsock_set_handshake_ivl (void *self, int handshake_ivl);
//  Get socket option `socks_proxy`.
//  Available from libzmq 4.1.0.
//  Caller owns return value and must destroy it when done.
CZMQ_EXPORT char *
    zsock_socks_proxy (void *self);
//  Set socket option `socks_proxy`.
//  Available from libzmq 4.1.0.
CZMQ_EXPORT void
    zsock_set_socks_proxy (void *self, const char *socks_proxy);
//  Set socket option `xpub_nodrop`.
//  Available from libzmq 4.1.0.
CZMQ_EXPORT void
    zsock_set_xpub_nodrop (void *self, int xpub_nodrop);
//  Set socket option `router_mandatory`.
//  Available from libzmq 4.0.0.
CZMQ_EXPORT void
    zsock_set_router_mandatory (void *self, int router_mandatory);
//  Set socket option `probe_router`.
//  Available from libzmq 4.0.0.
CZMQ_EXPORT void
    zsock_set_probe_router (void *self, int probe_router);
//  Set socket option `req_relaxed`.
//  Available from libzmq 4.0.0.
CZMQ_EXPORT void
    zsock_set_req_relaxed (void *self, int req_relaxed);
//  Set socket option `req_correlate`.
//  Available from libzmq 4.0.0.
CZMQ_EXPORT void
    zsock_set_req_correlate (void *self, int req_correlate);
//  Set socket option `conflate`.
//  Available from libzmq 4.0.0.
CZMQ_EXPORT void
    zsock_set_conflate (void *self, int conflate);
//  Get socket option `zap_domain`.
//  Available from libzmq 4.0.0.
//  Caller owns return value and must destroy it when done.
CZMQ_EXPORT char *
    zsock_zap_domain (void *self);
//  Set socket option `zap_domain`.
//  Available from libzmq 4.0.0.
CZMQ_EXPORT void
    zsock_set_zap_domain (void *self, const char *zap_domain);
//  Get socket option `mechanism`.
//  Available from libzmq 4.0.0.
//  Caller owns return value and must destroy it when done.
CZMQ_EXPORT int
    zsock_mechanism (void *self);
//  Get socket option `plain_server`.
//  Available from libzmq 4.0.0.
//  Caller owns return value and must destroy it when done.
CZMQ_EXPORT int
    zsock_plain_server (void *self);
//  Set socket option `plain_server`.
//  Available from libzmq 4.0.0.
CZMQ_EXPORT void
    zsock_set_plain_server (void *self, int plain_server);
//  Get socket option `plain_username`.
//  Available from libzmq 4.0.0.
//  Caller owns return value and must destroy it when done.
CZMQ_EXPORT char *
    zsock_plain_username (void *self);
//  Set socket option `plain_username`.
//  Available from libzmq 4.0.0.
CZMQ_EXPORT void
    zsock_set_plain_username (void *self, const char *plain_username);
//  Get socket option `plain_password`.
//  Available from libzmq 4.0.0.
//  Caller owns return value and must destroy it when done.
CZMQ_EXPORT char *
    zsock_plain_password (void *self);
//  Set socket option `plain_password`.
//  Available from libzmq 4.0.0.
CZMQ_EXPORT void
    zsock_set_plain_password (void *self, const char *plain_password);
//  Get socket option `curve_server`.
//  Available from libzmq 4.0.0.
//  Caller owns return value and must destroy it when done.
CZMQ_EXPORT int
    zsock_curve_server (void *self);
//  Set socket option `curve_server`.
//  Available from libzmq 4.0.0.
CZMQ_EXPORT void
    zsock_set_curve_server (void *self, int curve_server);
//  Get socket option `curve_publickey`.
//  Available from libzmq 4.0.0.
//  Caller owns return value and must destroy it when done.
CZMQ_EXPORT char *
    zsock_curve_publickey (void *self);
//  Set socket option `curve_publickey`.
//  Available from libzmq 4.0.0.
CZMQ_EXPORT void
    zsock_set_curve_publickey (void *self, const char *curve_publickey);
//  Set socket option `curve_publickey` from 32-octet binary
//  Available from libzmq 4.0.0.
CZMQ_EXPORT void
    zsock_set_curve_publickey_bin (void *self, const byte *curve_publickey);
//  Get socket option `curve_secretkey`.
//  Available from libzmq 4.0.0.
//  Caller owns return value and must destroy it when done.
CZMQ_EXPORT char *
    zsock_curve_secretkey (void *self);
//  Set socket option `curve_secretkey`.
//  Available from libzmq 4.0.0.
CZMQ_EXPORT void
    zsock_set_curve_secretkey (void *self, const char *curve_secretkey);
//  Set socket option `curve_secretkey` from 32-octet binary
//  Available from libzmq 4.0.0.
CZMQ_EXPORT void
    zsock_set_curve_secretkey_bin (void *self, const byte *curve_secretkey);
//  Get socket option `curve_serverkey`.
//  Available from libzmq 4.0.0.
//  Caller owns return value and must destroy it when done.
CZMQ_EXPORT char *
    zsock_curve_serverkey (void *self);
//  Set socket option `curve_serverkey`.
//  Available from libzmq 4.0.0.
CZMQ_EXPORT void
    zsock_set_curve_serverkey (void *self, const char *curve_serverkey);
//  Set socket option `curve_serverkey` from 32-octet binary
//  Available from libzmq 4.0.0.
CZMQ_EXPORT void
    zsock_set_curve_serverkey_bin (void *self, const byte *curve_serverkey);
//  Get socket option `gssapi_server`.
//  Available from libzmq 4.0.0.
//  Caller owns return value and must destroy it when done.
CZMQ_EXPORT int
    zsock_gssapi_server (void *self);
//  Set socket option `gssapi_server`.
//  Available from libzmq 4.0.0.
CZMQ_EXPORT void
    zsock_set_gssapi_server (void *self, int gssapi_server);
//  Get socket option `gssapi_plaintext`.
//  Available from libzmq 4.0.0.
//  Caller owns return value and must destroy it when done.
CZMQ_EXPORT int
    zsock_gssapi_plaintext (void *self);
//  Set socket option `gssapi_plaintext`.
//  Available from libzmq 4.0.0.
CZMQ_EXPORT void
    zsock_set_gssapi_plaintext (void *self, int gssapi_plaintext);
//  Get socket option `gssapi_principal`.
//  Available from libzmq 4.0.0.
//  Caller owns return value and must destroy it when done.
CZMQ_EXPORT char *
    zsock_gssapi_principal (void *self);
//  Set socket option `gssapi_principal`.
//  Available from libzmq 4.0.0.
CZMQ_EXPORT void
    zsock_set_gssapi_principal (void *self, const char *gssapi_principal);
//  Get socket option `gssapi_service_principal`.
//  Available from libzmq 4.0.0.
//  Caller owns return value and must destroy it when done.
CZMQ_EXPORT char *
    zsock_gssapi_service_principal (void *self);
//  Set socket option `gssapi_service_principal`.
//  Available from libzmq 4.0.0.
CZMQ_EXPORT void
    zsock_set_gssapi_service_principal (void *self, const char *gssapi_service_principal);
//  Get socket option `ipv6`.
//  Available from libzmq 4.0.0.
//  Caller owns return value and must destroy it when done.
CZMQ_EXPORT int
    zsock_ipv6 (void *self);
//  Set socket option `ipv6`.
//  Available from libzmq 4.0.0.
CZMQ_EXPORT void
    zsock_set_ipv6 (void *self, int ipv6);
//  Get socket option `immediate`.
//  Available from libzmq 4.0.0.
//  Caller owns return value and must destroy it when done.
CZMQ_EXPORT int
    zsock_immediate (void *self);
//  Set socket option `immediate`.
//  Available from libzmq 4.0.0.
CZMQ_EXPORT void
    zsock_set_immediate (void *self, int immediate);
//  Get socket option `sndhwm`.
//  Available from libzmq 3.0.0.
//  Caller owns return value and must destroy it when done.
CZMQ_EXPORT int
    zsock_sndhwm (void *self);
//  Set socket option `sndhwm`.
//  Available from libzmq 3.0.0.
CZMQ_EXPORT void
    zsock_set_sndhwm (void *self, int sndhwm);
//  Get socket option `rcvhwm`.
//  Available from libzmq 3.0.0.
//  Caller owns return value and must destroy it when done.
CZMQ_EXPORT int
    zsock_rcvhwm (void *self);
//  Set socket option `rcvhwm`.
//  Available from libzmq 3.0.0.
CZMQ_EXPORT void
    zsock_set_rcvhwm (void *self, int rcvhwm);
//  Get socket option `maxmsgsize`.
//  Available from libzmq 3.0.0.
//  Caller owns return value and must destroy it when done.
CZMQ_EXPORT int
    zsock_maxmsgsize (void *self);
//  Set socket option `maxmsgsize`.
//  Available from libzmq 3.0.0.
CZMQ_EXPORT void
    zsock_set_maxmsgsize (void *self, int maxmsgsize);
//  Get socket option `multicast_hops`.
//  Available from libzmq 3.0.0.
//  Caller owns return value and must destroy it when done.
CZMQ_EXPORT int
    zsock_multicast_hops (void *self);
//  Set socket option `multicast_hops`.
//  Available from libzmq 3.0.0.
CZMQ_EXPORT void
    zsock_set_multicast_hops (void *self, int multicast_hops);
//  Set socket option `xpub_verbose`.
//  Available from libzmq 3.0.0.
CZMQ_EXPORT void
    zsock_set_xpub_verbose (void *self, int xpub_verbose);
//  Get socket option `tcp_keepalive`.
//  Available from libzmq 3.0.0.
//  Caller owns return value and must destroy it when done.
CZMQ_EXPORT int
    zsock_tcp_keepalive (void *self);
//  Set socket option `tcp_keepalive`.
//  Available from libzmq 3.0.0.
CZMQ_EXPORT void
    zsock_set_tcp_keepalive (void *self, int tcp_keepalive);
//  Get socket option `tcp_keepalive_idle`.
//  Available from libzmq 3.0.0.
//  Caller owns return value and must destroy it when done.
CZMQ_EXPORT int
    zsock_tcp_keepalive_idle (void *self);
//  Set socket option `tcp_keepalive_idle`.
//  Available from libzmq 3.0.0.
CZMQ_EXPORT void
    zsock_set_tcp_keepalive_idle (void *self, int tcp_keepalive_idle);
//  Get socket option `tcp_keepalive_cnt`.
//  Available from libzmq 3.0.0.
//  Caller owns return value and must destroy it when done.
CZMQ_EXPORT int
    zsock_tcp_keepalive_cnt (void *self);
//  Set socket option `tcp_keepalive_cnt`.
//  Available from libzmq 3.0.0.
CZMQ_EXPORT void
    zsock_set_tcp_keepalive_cnt (void *self, int tcp_keepalive_cnt);
//  Get socket option `tcp_keepalive_intvl`.
//  Available from libzmq 3.0.0.
//  Caller owns return value and must destroy it when done.
CZMQ_EXPORT int
    zsock_tcp_keepalive_intvl (void *self);
//  Set socket option `tcp_keepalive_intvl`.
//  Available from libzmq 3.0.0.
CZMQ_EXPORT void
    zsock_set_tcp_keepalive_intvl (void *self, int tcp_keepalive_intvl);
//  Get socket option `tcp_accept_filter`.
//  Available from libzmq 3.0.0.
//  Caller owns return value and must destroy it when done.
CZMQ_EXPORT char *
    zsock_tcp_accept_filter (void *self);
//  Set socket option `tcp_accept_filter`.
//  Available from libzmq 3.0.0.
CZMQ_EXPORT void
    zsock_set_tcp_accept_filter (void *self, const char *tcp_accept_filter);
//  Get socket option `last_endpoint`.
//  Available from libzmq 3.0.0.
//  Caller owns return value and must destroy it when done.
CZMQ_EXPORT char *
    zsock_last_endpoint (void *self);
//  Set socket option `router_raw`.
//  Available from libzmq 3.0.0.
CZMQ_EXPORT void
    zsock_set_router_raw (void *self, int router_raw);
//  Get socket option `ipv4only`.
//  Available from libzmq 3.0.0.
//  Caller owns return value and must destroy it when done.
CZMQ_EXPORT int
    zsock_ipv4only (void *self);
//  Set socket option `ipv4only`.
//  Available from libzmq 3.0.0.
CZMQ_EXPORT void
    zsock_set_ipv4only (void *self, int ipv4only);
//  Set socket option `delay_attach_on_connect`.
//  Available from libzmq 3.0.0.
CZMQ_EXPORT void
    zsock_set_delay_attach_on_connect (void *self, int delay_attach_on_connect);
//  Get socket option `hwm`.
//  Available from libzmq 2.0.0 to 3.0.0.
//  Caller owns return value and must destroy it when done.
CZMQ_EXPORT int
    zsock_hwm (void *self);
//  Set socket option `hwm`.
//  Available from libzmq 2.0.0 to 3.0.0.
CZMQ_EXPORT void
    zsock_set_hwm (void *self, int hwm);
//  Get socket option `swap`.
//  Available from libzmq 2.0.0 to 3.0.0.
//  Caller owns return value and must destroy it when done.
CZMQ_EXPORT int
    zsock_swap (void *self);
//  Set socket option `swap`.
//  Available from libzmq 2.0.0 to 3.0.0.
CZMQ_EXPORT void
    zsock_set_swap (void *self, int swap);
//  Get socket option `affinity`.
//  Available from libzmq 2.0.0.
//  Caller owns return value and must destroy it when done.
CZMQ_EXPORT int
    zsock_affinity (void *self);
//  Set socket option `affinity`.
//  Available from libzmq 2.0.0.
CZMQ_EXPORT void
    zsock_set_affinity (void *self, int affinity);
//  Get socket option `identity`.
//  Available from libzmq 2.0.0.
//  Caller owns return value and must destroy it when done.
CZMQ_EXPORT char *
    zsock_identity (void *self);
//  Set socket option `identity`.
//  Available from libzmq 2.0.0.
CZMQ_EXPORT void
    zsock_set_identity (void *self, const char *identity);
//  Get socket option `rate`.
//  Available from libzmq 2.0.0.
//  Caller owns return value and must destroy it when done.
CZMQ_EXPORT int
    zsock_rate (void *self);
//  Set socket option `rate`.
//  Available from libzmq 2.0.0.
CZMQ_EXPORT void
    zsock_set_rate (void *self, int rate);
//  Get socket option `recovery_ivl`.
//  Available from libzmq 2.0.0.
//  Caller owns return value and must destroy it when done.
CZMQ_EXPORT int
    zsock_recovery_ivl (void *self);
//  Set socket option `recovery_ivl`.
//  Available from libzmq 2.0.0.
CZMQ_EXPORT void
    zsock_set_recovery_ivl (void *self, int recovery_ivl);
//  Get socket option `recovery_ivl_msec`.
//  Available from libzmq 2.0.0 to 3.0.0.
//  Caller owns return value and must destroy it when done.
CZMQ_EXPORT int
    zsock_recovery_ivl_msec (void *self);
//  Set socket option `recovery_ivl_msec`.
//  Available from libzmq 2.0.0 to 3.0.0.
CZMQ_EXPORT void
    zsock_set_recovery_ivl_msec (void *self, int recovery_ivl_msec);
//  Get socket option `mcast_loop`.
//  Available from libzmq 2.0.0 to 3.0.0.
//  Caller owns return value and must destroy it when done.
CZMQ_EXPORT int
    zsock_mcast_loop (void *self);
//  Set socket option `mcast_loop`.
//  Available from libzmq 2.0.0 to 3.0.0.
CZMQ_EXPORT void
    zsock_set_mcast_loop (void *self, int mcast_loop);
//  Get socket option `rcvtimeo`.
//  Available from libzmq 2.2.0.
//  Caller owns return value and must destroy it when done.
CZMQ_EXPORT int
    zsock_rcvtimeo (void *self);
//  Set socket option `rcvtimeo`.
//  Available from libzmq 2.2.0.
CZMQ_EXPORT void
    zsock_set_rcvtimeo (void *self, int rcvtimeo);
//  Get socket option `sndtimeo`.
//  Available from libzmq 2.2.0.
//  Caller owns return value and must destroy it when done.
CZMQ_EXPORT int
    zsock_sndtimeo (void *self);
//  Set socket option `sndtimeo`.
//  Available from libzmq 2.2.0.
CZMQ_EXPORT void
    zsock_set_sndtimeo (void *self, int sndtimeo);
//  Get socket option `sndbuf`.
//  Available from libzmq 2.0.0.
//  Caller owns return value and must destroy it when done.
CZMQ_EXPORT int
    zsock_sndbuf (void *self);
//  Set socket option `sndbuf`.
//  Available from libzmq 2.0.0.
CZMQ_EXPORT void
    zsock_set_sndbuf (void *self, int sndbuf);
//  Get socket option `rcvbuf`.
//  Available from libzmq 2.0.0.
//  Caller owns return value and must destroy it when done.
CZMQ_EXPORT int
    zsock_rcvbuf (void *self);
//  Set socket option `rcvbuf`.
//  Available from libzmq 2.0.0.
CZMQ_EXPORT void
    zsock_set_rcvbuf (void *self, int rcvbuf);
//  Get socket option `linger`.
//  Available from libzmq 2.0.0.
//  Caller owns return value and must destroy it when done.
CZMQ_EXPORT int
    zsock_linger (void *self);
//  Set socket option `linger`.
//  Available from libzmq 2.0.0.
CZMQ_EXPORT void
    zsock_set_linger (void *self, int linger);
//  Get socket option `reconnect_ivl`.
//  Available from libzmq 2.0.0.
//  Caller owns return value and must destroy it when done.
CZMQ_EXPORT int
    zsock_reconnect_ivl (void *self);
//  Set socket option `reconnect_ivl`.
//  Available from libzmq 2.0.0.
CZMQ_EXPORT void
    zsock_set_reconnect_ivl (void *self, int reconnect_ivl);
//  Get socket option `reconnect_ivl_max`.
//  Available from libzmq 2.0.0.
//  Caller owns return value and must destroy it when done.
CZMQ_EXPORT int
    zsock_reconnect_ivl_max (void *self);
//  Set socket option `reconnect_ivl_max`.
//  Available from libzmq 2.0.0.
CZMQ_EXPORT void
    zsock_set_reconnect_ivl_max (void *self, int reconnect_ivl_max);
//  Get socket option `backlog`.
//  Available from libzmq 2.0.0.
//  Caller owns return value and must destroy it when done.
CZMQ_EXPORT int
    zsock_backlog (void *self);
//  Set socket option `backlog`.
//  Available from libzmq 2.0.0.
CZMQ_EXPORT void
    zsock_set_backlog (void *self, int backlog);
//  Set socket option `subscribe`.
//  Available from libzmq 2.0.0.
CZMQ_EXPORT void
    zsock_set_subscribe (void *self, const char *subscribe);
//  Set socket option `unsubscribe`.
//  Available from libzmq 2.0.0.
CZMQ_EXPORT void
    zsock_set_unsubscribe (void *self, const char *unsubscribe);
//  Get socket option `type`.
//  Available from libzmq 2.0.0.
//  Caller owns return value and must destroy it when done.
CZMQ_EXPORT int
    zsock_type (void *self);
//  Get socket option `rcvmore`.
//  Available from libzmq 2.0.0.
//  Caller owns return value and must destroy it when done.
CZMQ_EXPORT int
    zsock_rcvmore (void *self);
//  Get socket option `fd`.
//  Available from libzmq 2.0.0.
//  Caller owns return value and must destroy it when done.
CZMQ_EXPORT SOCKET
    zsock_fd (void *self);
//  Get socket option `events`.
//  Available from libzmq 2.0.0.
//  Caller owns return value and must destroy it when done.
CZMQ_EXPORT int
    zsock_events (void *self);
//  Self test of this class.
CZMQ_EXPORT void
    zsock_test (bool verbose);
#ifdef CZMQ_BUILD_DRAFT_API
//  *** Draft method, for development use, may change without warning ***
//  Create a SERVER socket. Default action is bind.
CZMQ_EXPORT zsock_t *
    zsock_new_server (const char *endpoint);
//  *** Draft method, for development use, may change without warning ***
//  Create a CLIENT socket. Default action is connect.
CZMQ_EXPORT zsock_t *
    zsock_new_client (const char *endpoint);
//  *** Draft method, for development use, may change without warning ***
//  Create a RADIO socket. Default action is bind.
CZMQ_EXPORT zsock_t *
    zsock_new_radio (const char *endpoint);
//  *** Draft method, for development use, may change without warning ***
//  Create a DISH socket. Default action is connect.
CZMQ_EXPORT zsock_t *
    zsock_new_dish (const char *endpoint);
//  *** Draft method, for development use, may change without warning ***
//  Create a GATHER socket. Default action is bind.
CZMQ_EXPORT zsock_t *
    zsock_new_gather (const char *endpoint);
//  *** Draft method, for development use, may change without warning ***
//  Create a SCATTER socket. Default action is connect.
CZMQ_EXPORT zsock_t *
    zsock_new_scatter (const char *endpoint);
//  *** Draft method, for development use, may change without warning ***
//  Create a DGRAM (UDP) socket. Default action is bind.
//  The endpoint is a string consisting of a
//  'transport'`://` followed by an 'address'. As this is
//  a UDP socket the 'transport' has to be 'udp'. The
//  'address' specifies the ip address and port to
//  bind to. For example:  udp://127.0.0.1:1234
//  Note: To send to an endpoint over UDP you have to
//  send a message with the destination endpoint address
//  as a first message!
CZMQ_EXPORT zsock_t *
    zsock_new_dgram (const char *endpoint);
//  *** Draft method, for development use, may change without warning ***
//  Return socket routing ID if any. This returns 0 if the socket is not
//  of type ZMQ_SERVER or if no request was already received on it.
CZMQ_EXPORT uint32_t
    zsock_routing_id (zsock_t *self);
//  *** Draft method, for development use, may change without warning ***
//  Set routing ID on socket. The socket MUST be of type ZMQ_SERVER.
//  This will be used when sending messages on the socket via the zsock API.
CZMQ_EXPORT void
    zsock_set_routing_id (zsock_t *self, uint32_t routing_id);
//  *** Draft method, for development use, may change without warning ***
//  Join a group for the RADIO-DISH pattern. Call only on ZMQ_DISH.
//  Returns 0 if OK, -1 if failed.
CZMQ_EXPORT int
    zsock_join (void *self, const char *group);
//  *** Draft method, for development use, may change without warning ***
//  Leave a group for the RADIO-DISH pattern. Call only on ZMQ_DISH.
//  Returns 0 if OK, -1 if failed.
CZMQ_EXPORT int
    zsock_leave (void *self, const char *group);
//  *** Draft method, for development use, may change without warning ***
//  Check whether the socket has available message to read.
CZMQ_EXPORT bool
    zsock_has_in (void *self);
#endif // CZMQ_BUILD_DRAFT_API
Please add '@interface' section in '/home/builder/.termux-build/libczmq/src/doc/../src/zsock.c'.

DESCRIPTION

The zsock class wraps the libzmq socket handle (a void *) with a proper structure that follows the CLASS rules for construction and destruction. Some zsock methods take a void * "polymorphic" reference, which can be either a zsock_t or a zactor_t reference, or a libzmq void *.

Please add @discuss section in /home/builder/.termux-build/libczmq/src/doc/../src/zsock.c.

EXAMPLE

From zsock_test method.

    zsock_t *writer = zsock_new (ZMQ_PUSH);
    assert (writer);
    int port = zsock_bind (writer, "tcp://127.0.0.1:*");
    assert (port != -1);
    assert (zsock_resolve (writer) != writer);
    assert (streq (zsock_type_str (writer), "PUSH"));
    int rc;
    #if (ZMQ_VERSION >= ZMQ_MAKE_VERSION (3, 2, 0))
    //  Check unbind
    rc = zsock_unbind (writer, "tcp://127.0.0.1:%d", port);
    assert (rc == 0);
    //  In some cases and especially when running under Valgrind, doing
    //  a bind immediately after an unbind causes an EADDRINUSE error.
    //  Even a short sleep allows the OS to release the port for reuse.
    zclock_sleep (100);
    //  Bind again
    rc = zsock_bind (writer, "tcp://127.0.0.1:%d", port);
    assert (rc == port);
    char endpoint [40];
    sprintf (endpoint, "tcp://127.0.0.1:%d", port);
    assert (streq (zsock_endpoint (writer), endpoint));
    #endif
    zsock_t *reader = zsock_new (ZMQ_PULL);
    assert (reader);
    rc = zsock_connect (reader, "tcp://127.0.0.1:%d", port);
    assert (rc != -1);
    assert (zsock_resolve (reader) != reader);
    assert (streq (zsock_type_str (reader), "PULL"));
    //  Basic Hello, World
    zstr_send (writer, "Hello, World");
    zmsg_t *msg = zmsg_recv (reader);
    assert (msg);
    char *string = zmsg_popstr (msg);
    assert (streq (string, "Hello, World"));
    freen (string);
    zmsg_destroy (&msg);
    //  Test resolve libzmq socket
    #if (ZMQ_VERSION >= ZMQ_MAKE_VERSION (3, 2, 0))
    void *zmq_ctx = zmq_ctx_new ();
    #else
    void *zmq_ctx = zmq_ctx_new (1);
    #endif
    assert (zmq_ctx);
    void *zmq_sock = zmq_socket (zmq_ctx, ZMQ_PUB);
    assert (zmq_sock);
    assert (zsock_resolve (zmq_sock) == zmq_sock);
    zmq_close (zmq_sock);
    zmq_ctx_term (zmq_ctx);
    //  Test resolve zsock
    zsock_t *resolve = zsock_new_pub("@tcp://127.0.0.1:*");
    assert (resolve);
    assert (zsock_resolve (resolve) == resolve->handle);
    zsock_destroy (&resolve);
    //  Test resolve FD
    SOCKET fd = zsock_fd (reader);
    assert (zsock_resolve ((void *) &fd) == NULL);
    //  Test binding to ephemeral ports, sequential and random
    port = zsock_bind (writer, "tcp://127.0.0.1:*");
    assert (port >= DYNAMIC_FIRST && port <= DYNAMIC_LAST);
    port = zsock_bind (writer, "tcp://127.0.0.1:*[50000-]");
    assert (port >= 50000 && port <= DYNAMIC_LAST);
    port = zsock_bind (writer, "tcp://127.0.0.1:*[-50001]");
    assert (port >= DYNAMIC_FIRST && port <= 50001);
    port = zsock_bind (writer, "tcp://127.0.0.1:*[60000-60500]");
    assert (port >= 60000 && port <= 60500);
    port = zsock_bind (writer, "tcp://127.0.0.1:!");
    assert (port >= DYNAMIC_FIRST && port <= DYNAMIC_LAST);
    port = zsock_bind (writer, "tcp://127.0.0.1:![50000-]");
    assert (port >= 50000 && port <= DYNAMIC_LAST);
    port = zsock_bind (writer, "tcp://127.0.0.1:![-50001]");
    assert (port >= DYNAMIC_FIRST && port <= 50001);
    port = zsock_bind (writer, "tcp://127.0.0.1:![60000-60500]");
    assert (port >= 60000 && port <= 60500);
    //  Test zsock_attach method
    zsock_t *dealer = zsock_new (ZMQ_DEALER);
    assert (dealer);
    rc = zsock_attach (dealer, "@inproc://myendpoint,tcp://127.0.0.1:*,inproc://others", true);
    assert (rc == 0);
    rc = zsock_attach (dealer, "", false);
    assert (rc == 0);
    rc = zsock_attach (dealer, NULL, true);
    assert (rc == 0);
    rc = zsock_attach (dealer, ">a,@b, c,, ", false);
    assert (rc == -1);
    zsock_destroy (&dealer);
    //  Test zsock_endpoint method
    rc = zsock_bind (writer, "inproc://test.%s", "writer");
    assert (rc == 0);
    assert (streq (zsock_endpoint (writer), "inproc://test.writer"));
    //  Test error state when connecting to an invalid socket type
    //  ('txp://' instead of 'tcp://', typo intentional)
    rc = zsock_connect (reader, "txp://127.0.0.1:5560");
    assert (rc == -1);
    //  Test signal/wait methods
    rc = zsock_signal (writer, 123);
    assert (rc == 0);
    rc = zsock_wait (reader);
    assert (rc == 123);
    //  Test zsock_send/recv pictures
    uint8_t  number1 = 123;
    uint16_t number2 = 123 * 123;
    uint32_t number4 = 123 * 123;
    number4 *= 123;
    uint32_t number4_MAX = UINT32_MAX;
    uint64_t number8 = 123 * 123;
    number8 *= 123;
    number8 *= 123;
    uint64_t number8_MAX = UINT64_MAX;
    zchunk_t *chunk = zchunk_new ("HELLO", 5);
    assert (chunk);
    zframe_t *frame = zframe_new ("WORLD", 5);
    assert (frame);
    zhashx_t *hash = zhashx_new ();
    assert (hash);
    #ifdef CZMQ_BUILD_DRAFT_API
    zlistx_t *list = zlistx_new ();
    assert (list);
    #endif
    zuuid_t *uuid = zuuid_new ();
    assert (uuid);
    zhashx_set_destructor (hash, (zhashx_destructor_fn *) zstr_free);
    zhashx_set_duplicator (hash, (zhashx_duplicator_fn *) strdup);
    zhashx_insert (hash, "1", "value A");
    zhashx_insert (hash, "2", "value B");
    #ifdef CZMQ_BUILD_DRAFT_API
    zlistx_set_destructor (list, (zlistx_destructor_fn *) zstr_free);
    zlistx_set_duplicator (list, (zlistx_duplicator_fn *) strdup);
    zlistx_add_end (list, "1");
    zlistx_add_end (list, "2");
    #endif
    char *original = "pointer";
    //  Test zsock_recv into each supported type
    #ifdef CZMQ_BUILD_DRAFT_API
    zsock_send (writer, "i124488zsbcfUhlp",
    #else
    zsock_send (writer, "i124488zsbcfUhp",
    #endif
                -12345, number1, number2, number4, number4_MAX,
                number8, number8_MAX,
                "This is a string", "ABCDE", 5,
    #ifdef CZMQ_BUILD_DRAFT_API
                chunk, frame, uuid, hash, list, original);
    #else
                chunk, frame, uuid, hash, original);
    #endif
    char *uuid_str = strdup (zuuid_str (uuid));
    zchunk_destroy (&chunk);
    zframe_destroy (&frame);
    zuuid_destroy (&uuid);
    zhashx_destroy (&hash);
    #ifdef CZMQ_BUILD_DRAFT_API
    zlistx_destroy (&list);
    #endif
    int integer;
    byte *data;
    size_t size;
    char *pointer;
    number8_MAX = number8 = number4_MAX = number4 = number2 = number1 = 0ULL;
    #ifdef CZMQ_BUILD_DRAFT_API
    rc = zsock_recv (reader, "i124488zsbcfUhlp",
    #else
    rc = zsock_recv (reader, "i124488zsbcfUhp",
    #endif
                     &integer, &number1, &number2, &number4, &number4_MAX,
                     &number8, &number8_MAX, &string, &data, &size, &chunk,
    #ifdef CZMQ_BUILD_DRAFT_API
                     &frame, &uuid, &hash, &list, &pointer);
    #else
                     &frame, &uuid, &hash, &pointer);
    #endif
    assert (rc == 0);
    assert (integer == -12345);
    assert (number1 == 123);
    assert (number2 == 123 * 123);
    assert (number4 == 123 * 123 * 123);
    assert (number4_MAX == UINT32_MAX);
    assert (number8 == 123 * 123 * 123 * 123);
    assert (number8_MAX == UINT64_MAX);
    assert (streq (string, "This is a string"));
    assert (memcmp (data, "ABCDE", 5) == 0);
    assert (size == 5);
    assert (memcmp (zchunk_data (chunk), "HELLO", 5) == 0);
    assert (zchunk_size (chunk) == 5);
    assert (streq (uuid_str, zuuid_str (uuid)));
    assert (memcmp (zframe_data (frame), "WORLD", 5) == 0);
    assert (zframe_size (frame) == 5);
    char *value = (char *) zhashx_lookup (hash, "1");
    assert (streq (value, "value A"));
    value = (char *) zhashx_lookup (hash, "2");
    assert (streq (value, "value B"));
    #ifdef CZMQ_BUILD_DRAFT_API
    value = (char *) zlistx_first (list);
    assert (streq (value, "1"));
    value = (char *) zlistx_last (list);
    assert (streq (value, "2"));
    #endif
    assert (original == pointer);
    freen (string);
    freen (data);
    freen (uuid_str);
    zframe_destroy (&frame);
    zchunk_destroy (&chunk);
    zhashx_destroy (&hash);
    #ifdef CZMQ_BUILD_DRAFT_API
    zlistx_destroy (&list);
    #endif
    zuuid_destroy (&uuid);
    //  Test zsock_recv of short message; this lets us return a failure
    //  with a status code and then nothing else; the receiver will get
    //  the status code and NULL/zero for all other values
    zsock_send (writer, "i", -1);
    zsock_recv (reader, "izsbcfp",
        &integer, &string, &data, &size, &chunk, &frame, &pointer);
    assert (integer == -1);
    assert (string == NULL);
    assert (data == NULL);
    assert (size == 0);
    assert (chunk == NULL);
    assert (frame == NULL);
    assert (pointer == NULL);
    msg = zmsg_new ();
    zmsg_addstr (msg, "frame 1");
    zmsg_addstr (msg, "frame 2");
    zsock_send (writer, "szm", "header", msg);
    zmsg_destroy (&msg);
    zsock_recv (reader, "szm", &string, &msg);
    assert (streq ("header", string));
    assert (zmsg_size (msg) == 2);
    assert (zframe_streq (zmsg_first (msg), "frame 1"));
    assert (zframe_streq (zmsg_next (msg), "frame 2"));
    zstr_free (&string);
    zmsg_destroy (&msg);
    //  Test zsock_recv with null arguments
    chunk = zchunk_new ("HELLO", 5);
    assert (chunk);
    frame = zframe_new ("WORLD", 5);
    assert (frame);
    zsock_send (writer, "izsbcfp",
                -12345, "This is a string", "ABCDE", 5, chunk, frame, original);
    zframe_destroy (&frame);
    zchunk_destroy (&chunk);
    zsock_recv (reader, "izsbcfp", &integer, NULL, NULL, NULL, &chunk, NULL, NULL);
    assert (integer == -12345);
    assert (memcmp (zchunk_data (chunk), "HELLO", 5) == 0);
    assert (zchunk_size (chunk) == 5);
    zchunk_destroy (&chunk);
    //  Test zsock_bsend/brecv pictures with binary encoding
    frame = zframe_new ("Hello", 5);
    chunk = zchunk_new ("World", 5);
    msg = zmsg_new ();
    zmsg_addstr (msg, "Hello");
    zmsg_addstr (msg, "World");
    zsock_bsend (writer, "1248sSpcfm",
                 number1, number2, number4, number8,
                 "Hello, World",
                 "Goodbye cruel World!",
                 original,
                 chunk, frame, msg);
    zchunk_destroy (&chunk);
    zframe_destroy (&frame);
    zmsg_destroy (&msg);
    number8 = number4 = number2 = number1 = 0;
    char *longstr;
    zsock_brecv (reader, "1248sSpcfm",
                 &number1, &number2, &number4, &number8,
                 &string, &longstr,
                 &pointer,
                 &chunk, &frame, &msg);
    assert (number1 == 123);
    assert (number2 == 123 * 123);
    assert (number4 == 123 * 123 * 123);
    assert (number8 == 123 * 123 * 123 * 123);
    assert (streq (string, "Hello, World"));
    assert (streq (longstr, "Goodbye cruel World!"));
    assert (pointer == original);
    zstr_free (&longstr);
    zchunk_destroy (&chunk);
    zframe_destroy (&frame);
    zmsg_destroy (&msg);
    #ifdef ZMQ_SERVER
    //  Test zsock_bsend/brecv pictures with binary encoding on SERVER and CLIENT sockets
    zsock_t *server = zsock_new (ZMQ_SERVER);
    assert (server);
    port = zsock_bind (server, "tcp://127.0.0.1:*");
    assert (port != -1);
    zsock_t* client = zsock_new (ZMQ_CLIENT);
    assert (client);
    rc = zsock_connect (client, "tcp://127.0.0.1:%d", port);
    assert (rc != -1);
    //  From client to server
    chunk = zchunk_new ("World", 5);
    zsock_bsend (client, "1248sSpc",
                 number1, number2, number4, number8,
                 "Hello, World",
                 "Goodbye cruel World!",
                 original,
                 chunk);
    zchunk_destroy (&chunk);
    number8 = number4 = number2 = number1 = 0;
    zsock_brecv (server, "1248sSpc",
                 &number1, &number2, &number4, &number8,
                 &string, &longstr,
                 &pointer,
                 &chunk);
    assert (number1 == 123);
    assert (number2 == 123 * 123);
    assert (number4 == 123 * 123 * 123);
    assert (number8 == 123 * 123 * 123 * 123);
    assert (streq (string, "Hello, World"));
    assert (streq (longstr, "Goodbye cruel World!"));
    assert (pointer == original);
    assert (zsock_routing_id (server));
    zstr_free (&longstr);
    zchunk_destroy (&chunk);
    //  From server to client
    chunk = zchunk_new ("World", 5);
    zsock_bsend (server, "1248sSpc",
                 number1, number2, number4, number8,
                 "Hello, World",
                 "Goodbye cruel World!",
                 original,
                 chunk);
    zchunk_destroy (&chunk);
    number8 = number4 = number2 = number1 = 0;
    zsock_brecv (client, "1248sSpc",
                 &number1, &number2, &number4, &number8,
                 &string, &longstr,
                 &pointer,
                 &chunk);
    assert (number1 == 123);
    assert (number2 == 123 * 123);
    assert (number4 == 123 * 123 * 123);
    assert (number8 == 123 * 123 * 123 * 123);
    assert (streq (string, "Hello, World"));
    assert (streq (longstr, "Goodbye cruel World!"));
    assert (pointer == original);
    assert (zsock_routing_id (client) == 0);
    zstr_free (&longstr);
    zchunk_destroy (&chunk);
    zsock_destroy (&client);
    zsock_destroy (&server);
    #else
    errno = 0;
    zsock_t* server = zsock_new_server (NULL);
    assert(server == NULL);
    assert(errno == ENOTSUP);
    errno = 0;
    zsock_t* client = zsock_new_client (NULL);
    assert(client == NULL);
    assert(errno == ENOTSUP);
    #endif
    #ifdef ZMQ_SCATTER
    zsock_t* gather = zsock_new_gather ("inproc://test-gather-scatter");
    assert (gather);
    zsock_t* scatter = zsock_new_scatter ("inproc://test-gather-scatter");
    assert (scatter);
    rc = zstr_send (scatter, "HELLO");
    assert (rc == 0);
    char* message;
    message = zstr_recv (gather);
    assert (streq(message, "HELLO"));
    zstr_free (&message);
    zsock_destroy (&gather);
    zsock_destroy (&scatter);
    #else
    errno = 0;
    zsock_t* scatter = zsock_new_scatter (NULL);
    assert(scatter == NULL);
    assert(errno == ENOTSUP);
    errno = 0;
    zsock_t* gather = zsock_new_gather (NULL);
    assert(gather == NULL);
    assert(errno == ENOTSUP);
    #endif
    #ifndef ZMQ_RADIO
    errno = 0;
    zsock_t* radio = zsock_new_radio (NULL);
    assert(radio == NULL);
    assert(errno == ENOTSUP);
    errno = 0;
    zsock_t* dish = zsock_new_dish (NULL);
    assert(dish == NULL);
    assert(errno == ENOTSUP);
    errno = 0;
    zsock_t* sock = zsock_new_req (NULL); // any supported socket type
    rc = zsock_join (sock, "group1");
    assert(rc == -1);
    assert(errno == ENOTSUP);
    errno = 0;
    rc = zsock_leave (sock, "group1");
    assert(rc == -1);
    assert(errno == ENOTSUP);
    zsock_destroy (&sock);
    #endif
    //  Check that we can send a zproto format message
    zsock_bsend (writer, "1111sS4", 0xAA, 0xA0, 0x02, 0x01, "key", "value", 1234);
    zgossip_msg_t *gossip = zgossip_msg_new ();
    zgossip_msg_recv (gossip, reader);
    assert (zgossip_msg_id (gossip) == ZGOSSIP_MSG_PUBLISH);
    zgossip_msg_destroy (&gossip);
    zsock_destroy (&reader);
    zsock_destroy (&writer);
    #ifdef ZMQ_DGRAM
    // ZMQ_DGRAM ipv4 unicast test
    zsock_t* dgramr = zsock_new_dgram ("udp://*:7777");
    assert (dgramr);
    assert ( streq( "DGRAM", zsys_sockname(ZMQ_DGRAM)) );
    //zsock_t* dgrams = zsock_new_dgram ("udp://*:*");
    zsock_t* dgrams = zsock_new (ZMQ_DGRAM);
    zsock_bind (dgrams, "udp://127.0.0.1:7778" );
    assert (dgrams);
    // perhaps sleep a little for sockets to setup?
    rc = zstr_sendm( dgrams, "127.0.0.1:7777" );
    assert (rc == 0);
    rc = zstr_send (dgrams, "HELLO");
    assert (rc == 0);
    char *dmessage, *addr;
    zmsg_t *dmsg = zmsg_recv( dgramr );
    assert (dmsg);
    addr = zmsg_popstr (dmsg);
    dmessage = zmsg_popstr (dmsg);
    assert (streq(dmessage, "HELLO"));
    zmsg_destroy ( &dmsg );
    zsock_destroy (&dgrams);
    zsock_destroy (&dgramr);
    zstr_free (&dmessage);
    zstr_free (&addr);
    zstr_free (&message);
    // ZMQ_DGRAM ipv4 multicast test
    zsock_t* mdgramr = zsock_new_dgram ("udp://225.25.25.25:7777");
    assert (mdgramr);
    zsock_t* mdgrams = zsock_new_dgram ("udp://*:*");
    assert (mdgrams);
    rc = zstr_sendm( mdgrams, "225.25.25.25:7777" );
    assert (rc == 0);
    rc = zstr_send (mdgrams, "HELLO");
    assert (rc == 0);
    char *mdmessage, *maddr;
    zmsg_t *mdmsg = zmsg_recv( mdgramr );
    assert (mdmsg);
    maddr = zmsg_popstr (mdmsg);
    mdmessage = zmsg_popstr (mdmsg);
    assert (streq(mdmessage, "HELLO"));
    zmsg_destroy ( &mdmsg );
    zsock_destroy (&mdgrams);
    zsock_destroy (&mdgramr);
    zstr_free (&mdmessage);
    zstr_free (&maddr);
    zstr_free (&mdmessage);
    //    // ipv6 (not supported yet)
    //    zsys_set_ipv6(1);
    //    zsock_t* dgramr6 = zsock_new_dgram ("udp://*:7777");
    //    assert (dgramr6);
    //    zsock_t* dgrams6 = zsock_new_dgram ("udp://*:*");
    //    assert (dgrams6);
    //    // perhaps sleep a little for sockets to setup?
    //    zclock_sleep(100);
    //    rc = zstr_sendm( dgrams6, "::1:7777" );
    //    assert (rc == 0);
    //    rc = zstr_send (dgrams6, "HELLO");
    //    assert (rc == 0);
    //    char *dmessage6, *addr6;
    //    zmsg_t *dmsg6 = zmsg_recv( dgramr6 );
    //    assert (dmsg6);
    //    addr6 = zmsg_popstr (dmsg6);
    //    dmessage6 = zmsg_popstr(dmsg6);
    //    assert (streq(dmessage6, "HELLO"));
    //    zmsg_destroy( &dmsg6 );
    //    zsock_destroy (&dgrams6);
    //    zsock_destroy (&dgramr6);
    //    zstr_free (&dmessage6);
    //    zstr_free (&addr6);
    //    zstr_free (&dmessage6);
    #endif

AUTHORS

The czmq manual was written by the authors in the AUTHORS file.

RESOURCES

Main web site:

Report bugs to the email <zeromq-dev@lists.zeromq.org[1]>

COPYRIGHT

Copyright (c) the Contributors as noted in the AUTHORS file. This file is part of CZMQ, the high-level C binding for 0MQ: http://czmq.zeromq.org. This Source Code Form is subject to the terms of the Mozilla Public License, v. 2.0. If a copy of the MPL was not distributed with this file, You can obtain one at http://mozilla.org/MPL/2.0/. LICENSE included with the czmq distribution.

NOTES

1.  zeromq-dev@lists.zeromq.org
    mailto:zeromq-dev@lists.zeromq.org