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This reverts commit 512f3a604924fec9d89e2b4bfd6f73aa66309fa7.
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Implements SP protocol versioning, legacy protocol support, and the
following pattern protocol versions:
PAIR: v2
PUBSUB: v1 (legacy), v3
REQREP: v1
PIPELINE: v2
SURVEY: v1
Engine support is only for stream_engine_t at this stage.
Signed-off-by: Martin Lucina <martin@lucina.net>
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Survey pattern is "multicast with reply". There are two roles:
surveyor and respondent. Surveyor publishes a survey which gets
delivered to all connected respondents. Each repondent can send
a response to the survey. All the responses are delivered to
the original surveyor. Once the surveyor decides that the survey
is over (e.g. deadline was reached) it can send initiate survey.
Late responses from old surveys are automatically discarded by
the surveyor socket.
Socket types: SURVEYOR, XSURVEYOR, RESPONDENT, XRESPONDENT
Patch also includes a test program with surveoyr, two respondents
and an intermediary device.
Signed-off-by: Martin Sustrik <sustrik@250bpm.com>
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