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prevent duplicate connections from PUB sockets also (see https://gith… (#3117)

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* Update zmq_connect documentation to mention issue of multiple connects to the same endpoint
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Bill Torpey 2018-05-22 11:05:32 -04:00 committed by Luca Boccassi
parent c178193c50
commit 8ad0d5896e
1 changed files with 8 additions and 0 deletions
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doc/zmq_connect.txt
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@ -49,6 +49,14 @@ linkzmq:zmq_socket[3]. A ZMQ_ROUTER socket enters its normal 'ready' state
for a specific peer only when handshaking is complete for that peer, which
may take an arbitrary time.
NOTE: for some socket types, multiple connections to the same endpoint
don't really make sense
(see https://github.com/zeromq/libzmq/issues/788).
For those socket types, any attempt to connect to an already connected endpoint
is silently ignored (i.e., returns zero). This behavior applies to ZMQ_DEALER,
ZMQ_SUB, ZMQ_PUB, and ZMQ_REQ socket types.
RETURN VALUE
------------
The _zmq_connect()_ function returns zero if successful. Otherwise it returns