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https://reviews.apache.org/r/58224/
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(Updated May 4, 2017, 3:52 p.m.)


Review request for mesos and Benjamin Mahler.


Changes
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Added documentation.


Bugs: MESOS-7401
    https://issues.apache.org/jira/browse/MESOS-7401


Repository: mesos


Description
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In general, libprocess is unable to validate that a peer
is a legitimate owner of the UPID it claims in a libprocess
message. This change adds a check that the IP address in the
UPID matches the peer address. This makes spoofing the UPID
harder (eg. to send authenticated messages), but also breaks
some legitimate configurations, particularly on multihomed
hosts.


Diffs (updated)
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  3rdparty/libprocess/src/process.cpp f5b666f894215cb1861c244c94b382e0739bc5c9 
  docs/configuration.md 79cada3c9403881bf257d653f721d32e55607a7f 


Diff: https://reviews.apache.org/r/58224/diff/7/

Changes: https://reviews.apache.org/r/58224/diff/6-7/


Testing
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make check (Fedora 25). Light manual testing.

With LIBPROCESS_require_peer_address_ip_match=true, all Mesos tests pass except 
``ExamplesTest.DiskFullFramework``, however enabling this will definitely break 
some libprocess APIs (though not in the way that Mesos uses them) and 
legitimate multi-homed configurations. Note that setting 
LIBPROCESS_ip=127.0.0.1 makes you multihomed for this purpose, which is why 
``ExamplesTest.DiskFullFramework`` breaks.


Thanks,

James Peach

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