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Ran 20 Jul 2016 06:49AM UTC

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Committed 20 Jul 2016 06:07AM UTC coverage: 64.435%. First build

Job # TOX_ENV=py34

Build Type

push

travis-ci

Committed by

iwaseyusuke

Commit Message

stplib: Handle the port state not changed events

According to OpenFlow Spec 1.3.5, OFPT_PORT_STATUS messages with
the reason value OFPPR_MODIFY should be sent the BOTH port state
and config have changed.
On the other hand, OVS does not send OFPT_PORT_STATUS messages
when the port config has changed and only sends when the port
state has changed.
But, other switch implementation, e.g. Lagopus, sends messages
when the both port state and config have changed.
Therefore, simple_switch_stp_13.py will overproduce the topology
recalculation events and will fail to recalculate the topology.

This patch checks the port state in OFPT_PORT_STATUS messages
and ignores the message if the port state is not changed.

Reported-by: Hong Panha <c011361065@edu.teu.ac.jp>
Signed-off-by: IWASE Yusuke <iwase.yusuke0@gmail.com>

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