The 0MQ lightweight messaging kernel is a library which extends the standard socket interfaces with features traditionally provided by specialised messaging middleware products. 0MQ sockets provide an abstraction of asynchronous message queues, multiple messaging patterns, message filtering (subscriptions), seamless access to multiple transport protocols and more.This repository is used for making stable releases. Please do not send pull requests here unless they are specifically and only for this fork. Rather, send them to libzmq/master. Issues with test cases may be back ported to this repository by its maintainers.