tipc: guarantee group unicast doesn't bypass group broadcast

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Group unicast messages don't follow the same path as broadcast messages,
and there is a high risk that unicasts sent from a socket might bypass
previously sent broadcasts from the same socket.

We fix this by letting all unicast messages carry the sequence number of
the next sent broadcast from the same node, but without updating this
number at the receiver. This way, a receiver can check and if necessary
re-order such messages before they are added to the socket receive buffer.

Signed-off-by: Jon Maloy <jon.maloy@ericsson.com>
Acked-by: Ying Xue <ying.xue@windriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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Jon Maloy 2017-10-13 11:04:30 +02:00 • committed by David S. Miller

parent 5b8dddb637

commit b87a5ea31c

2 changed files with 74 additions and 15 deletions

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89

net/tipc/group.c

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2

net/tipc/socket.c

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