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zmq: Add support to listen on multiple interfaces

Description

zmq: Add support to listen on multiple interfaces

Summary:

This PR adds support for ZeroMQ to listen on multiple interfaces, just like the RPC server.
Currently, if you specify more than one e.g. zmqpubhashblock paramter, only the first one will be used. Therefore a user may be forced to listen on all interfaces (e.g. zmqpubhashblock=0.0.0.0:28332), which can result in an increased attack surface.
With this PR a user can specify multiple interfaces to listen on, e.g.
-zmqpubhashblock=tcp://127.0.0.1:28332 -zmqpubhashblock=tcp://192.168.1.123:28332.

This is a backport of core#18309

Test Plan: ninja all check-all

Reviewers: #bitcoin_abc, Fabien

Reviewed By: #bitcoin_abc, Fabien

Differential Revision: https://reviews.bitcoinabc.org/D10339

Details

Provenance
Nicolas Thumann <me@n-thumann.de>Authored on Mar 10 2020, 15:29
PiRKCommitted on Thu, Oct 14, 11:44
PiRKPushed on Thu, Oct 14, 11:44
Reviewer
Restricted Project
Differential Revision
D10339: zmq: Add support to listen on multiple interfaces
Parents
rABCe5c8cc0be46d: [avalanche] Sign the avalanche proof
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