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GENERIC allows to use 0MQ as a dumb networking framework. It provides user with connect/disconnect notifications. Also, each inbound message is labeled by ID of the connection it originated from. Outbound messages should be labeled by the ID of the connection to send them to. To distinguish connect/disconnect notifications from common messages, COMMAND flag was introduced. Signed-off-by: Martin Sustrik <sustrik@250bpm.com>
237 lines
7.7 KiB
C
237 lines
7.7 KiB
C
/*
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Copyright (c) 2007-2011 iMatix Corporation
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Copyright (c) 2007-2011 Other contributors as noted in the AUTHORS file
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This file is part of 0MQ.
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0MQ is free software; you can redistribute it and/or modify it under
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the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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0MQ is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef __ZMQ_H_INCLUDED__
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#define __ZMQ_H_INCLUDED__
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include <errno.h>
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#include <stddef.h>
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#if defined _WIN32
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#include <winsock2.h>
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#endif
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/* Handle DSO symbol visibility */
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#if defined _WIN32
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# if defined DLL_EXPORT
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# define ZMQ_EXPORT __declspec(dllexport)
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# else
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# define ZMQ_EXPORT __declspec(dllimport)
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# endif
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#else
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# if defined __SUNPRO_C || defined __SUNPRO_CC
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# define ZMQ_EXPORT __global
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# elif (defined __GNUC__ && __GNUC__ >= 4) || defined __INTEL_COMPILER
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# define ZMQ_EXPORT __attribute__ ((visibility("default")))
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# else
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# define ZMQ_EXPORT
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# endif
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#endif
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/******************************************************************************/
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/* 0MQ versioning support. */
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/******************************************************************************/
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/* Version macros for compile-time API version detection */
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#define ZMQ_VERSION_MAJOR 4
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#define ZMQ_VERSION_MINOR 0
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#define ZMQ_VERSION_PATCH 0
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#define ZMQ_MAKE_VERSION(major, minor, patch) \
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((major) * 10000 + (minor) * 100 + (patch))
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#define ZMQ_VERSION \
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ZMQ_MAKE_VERSION(ZMQ_VERSION_MAJOR, ZMQ_VERSION_MINOR, ZMQ_VERSION_PATCH)
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/* Run-time API version detection */
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ZMQ_EXPORT void zmq_version (int *major, int *minor, int *patch);
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/******************************************************************************/
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/* 0MQ errors. */
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/******************************************************************************/
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/* A number random enough not to collide with different errno ranges on */
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/* different OSes. The assumption is that error_t is at least 32-bit type. */
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#define ZMQ_HAUSNUMERO 156384712
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/* On Windows platform some of the standard POSIX errnos are not defined. */
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#ifndef ENOTSUP
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#define ENOTSUP (ZMQ_HAUSNUMERO + 1)
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#endif
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#ifndef EPROTONOSUPPORT
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#define EPROTONOSUPPORT (ZMQ_HAUSNUMERO + 2)
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#endif
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#ifndef ENOBUFS
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#define ENOBUFS (ZMQ_HAUSNUMERO + 3)
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#endif
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#ifndef ENETDOWN
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#define ENETDOWN (ZMQ_HAUSNUMERO + 4)
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#endif
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#ifndef EADDRINUSE
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#define EADDRINUSE (ZMQ_HAUSNUMERO + 5)
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#endif
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#ifndef EADDRNOTAVAIL
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#define EADDRNOTAVAIL (ZMQ_HAUSNUMERO + 6)
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#endif
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#ifndef ECONNREFUSED
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#define ECONNREFUSED (ZMQ_HAUSNUMERO + 7)
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#endif
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#ifndef EINPROGRESS
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#define EINPROGRESS (ZMQ_HAUSNUMERO + 8)
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#endif
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#ifndef ENOTSOCK
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#define ENOTSOCK (ZMQ_HAUSNUMERO + 9)
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#endif
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/* Native 0MQ error codes. */
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#define EFSM (ZMQ_HAUSNUMERO + 51)
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#define ENOCOMPATPROTO (ZMQ_HAUSNUMERO + 52)
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#define ETERM (ZMQ_HAUSNUMERO + 53)
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#define EMTHREAD (ZMQ_HAUSNUMERO + 54)
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/* This function retrieves the errno as it is known to 0MQ library. The goal */
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/* of this function is to make the code 100% portable, including where 0MQ */
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/* compiled with certain CRT library (on Windows) is linked to an */
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/* application that uses different CRT library. */
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ZMQ_EXPORT int zmq_errno (void);
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/* Resolves system errors and 0MQ errors to human-readable string. */
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ZMQ_EXPORT const char *zmq_strerror (int errnum);
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/******************************************************************************/
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/* 0MQ message definition. */
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/******************************************************************************/
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typedef unsigned char zmq_msg_t [32];
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typedef void (zmq_free_fn) (void *data, void *hint);
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ZMQ_EXPORT int zmq_msg_init (zmq_msg_t *msg);
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ZMQ_EXPORT int zmq_msg_init_size (zmq_msg_t *msg, size_t size);
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ZMQ_EXPORT int zmq_msg_init_data (zmq_msg_t *msg, void *data,
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size_t size, zmq_free_fn *ffn, void *hint);
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ZMQ_EXPORT int zmq_msg_close (zmq_msg_t *msg);
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ZMQ_EXPORT int zmq_msg_move (zmq_msg_t *dest, zmq_msg_t *src);
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ZMQ_EXPORT int zmq_msg_copy (zmq_msg_t *dest, zmq_msg_t *src);
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ZMQ_EXPORT void *zmq_msg_data (zmq_msg_t *msg);
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ZMQ_EXPORT size_t zmq_msg_size (zmq_msg_t *msg);
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/******************************************************************************/
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/* 0MQ infrastructure (a.k.a. context) initialisation & termination. */
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/******************************************************************************/
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ZMQ_EXPORT void *zmq_init (int io_threads);
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ZMQ_EXPORT int zmq_term (void *context);
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/******************************************************************************/
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/* 0MQ socket definition. */
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/******************************************************************************/
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/* Socket types. */
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#define ZMQ_PAIR 0
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#define ZMQ_PUB 1
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#define ZMQ_SUB 2
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#define ZMQ_REQ 3
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#define ZMQ_REP 4
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#define ZMQ_XREQ 5
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#define ZMQ_XREP 6
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#define ZMQ_PULL 7
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#define ZMQ_PUSH 8
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#define ZMQ_XPUB 9
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#define ZMQ_XSUB 10
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#define ZMQ_GENERIC 13
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/* Socket options. */
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#define ZMQ_AFFINITY 4
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#define ZMQ_SUBSCRIBE 6
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#define ZMQ_UNSUBSCRIBE 7
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#define ZMQ_RATE 8
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#define ZMQ_RECOVERY_IVL 9
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#define ZMQ_SNDBUF 11
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#define ZMQ_RCVBUF 12
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#define ZMQ_RCVMORE 13
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#define ZMQ_FD 14
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#define ZMQ_EVENTS 15
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#define ZMQ_TYPE 16
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#define ZMQ_LINGER 17
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#define ZMQ_RECONNECT_IVL 18
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#define ZMQ_BACKLOG 19
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#define ZMQ_RECONNECT_IVL_MAX 21
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#define ZMQ_MAXMSGSIZE 22
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#define ZMQ_SNDHWM 23
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#define ZMQ_RCVHWM 24
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#define ZMQ_MULTICAST_HOPS 25
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#define ZMQ_RCVTIMEO 27
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#define ZMQ_SNDTIMEO 28
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#define ZMQ_RCVLABEL 29
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#define ZMQ_RCVCMD 30
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/* Send/recv options. */
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#define ZMQ_DONTWAIT 1
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#define ZMQ_SNDMORE 2
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#define ZMQ_SNDLABEL 4
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#define ZMQ_SNDCMD 8
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ZMQ_EXPORT void *zmq_socket (void *context, int type);
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ZMQ_EXPORT int zmq_close (void *s);
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ZMQ_EXPORT int zmq_setsockopt (void *s, int option, const void *optval,
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size_t optvallen);
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ZMQ_EXPORT int zmq_getsockopt (void *s, int option, void *optval,
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size_t *optvallen);
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ZMQ_EXPORT int zmq_bind (void *s, const char *addr);
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ZMQ_EXPORT int zmq_connect (void *s, const char *addr);
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ZMQ_EXPORT int zmq_send (void *s, const void *buf, size_t len, int flags);
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ZMQ_EXPORT int zmq_recv (void *s, void *buf, size_t len, int flags);
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ZMQ_EXPORT int zmq_sendmsg (void *s, zmq_msg_t *msg, int flags);
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ZMQ_EXPORT int zmq_recvmsg (void *s, zmq_msg_t *msg, int flags);
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/******************************************************************************/
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/* I/O multiplexing. */
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/******************************************************************************/
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#define ZMQ_POLLIN 1
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#define ZMQ_POLLOUT 2
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#define ZMQ_POLLERR 4
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typedef struct
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{
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void *socket;
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#if defined _WIN32
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SOCKET fd;
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#else
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int fd;
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#endif
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short events;
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short revents;
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} zmq_pollitem_t;
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ZMQ_EXPORT int zmq_poll (zmq_pollitem_t *items, int nitems, long timeout);
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#undef ZMQ_EXPORT
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#ifdef __cplusplus
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}
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#endif
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#endif
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