A socket of type ZMQ::Socket::Pair can only be connected to a single peer at any one time. No message routing or filtering is performed on messages sent over a ZMQ::Socket::Pair socket.
When a ZMQ::Socket::Pair socket enters an exceptional state due to having reached the high water mark for the connected peer, or if no peer is connected, then any ZMQ::Socket#send operations on the socket shall block until the peer becomes available for sending; messages are not discarded.
Bidirectional
Unrestricted
N/A
N/A
Block
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