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Commit aa379b44 authored by Ben Pfaff's avatar Ben Pfaff

ofproto: Ignore generation ID for role change to "equal".

The OpenFlow specification says that only role changes to slave or master
check the generation ID, so this is a bug fix.

OpenFlow 1.2 section A.3.9 phrases the requirement this way:

    Additionally, if the role value in the message is OFPCR_ROLE_MASTER
    or OFPCR_ROLE_SLAVE, the switch must validate generation_id to check
    for stale messages.

Found by OFTest.
Signed-off-by: default avatarBen Pfaff <>
parent 378af564
......@@ -5255,7 +5255,8 @@ handle_role_request(struct ofconn *ofconn, const struct ofp_header *oh)
if (request.role != OFPCR12_ROLE_NOCHANGE) {
if (request.have_generation_id
if (request.role != OFPCR12_ROLE_EQUAL
&& request.have_generation_id
&& !ofconn_set_master_election_id(ofconn, request.generation_id)) {
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