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Currently we always deliver inbound TCP packets to the guest's most
recent observed IP address. This has the odd side effect that if the
guest changes its IP address with active TCP connections we might
deliver packets from old connections to the new address. That won't
work; it will probably result in an RST from the guest. Worse, if the
guest added a new address but also retains the old one, then we could
break those old connections by redirecting them to the new address.
Now that we maintain flowside information, we have a record of the correct
guest side address and can just use it.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
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Some information we explicitly store in the TCP connection is now
duplicated in the common flow structure. Access it from there instead, and
remove it from the TCP specific structure. With that done we can reorder
both the "tap" and "splice" TCP structures a bit to get better packing for
the new combined flow table entries.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
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Move all the TCP parts using internal buffers to tcp_buf.c
and keep generic TCP management functions in tcp.c.
Add tcp_internal.h to export needed functions from tcp.c and
tcp_buf.h from tcp_buf.c
With this change we can use existing TCP functions with a
different kind of memory storage as for instance the shared
memory provided by the guest via vhost-user.
Signed-off-by: Laurent Vivier <lvivier@redhat.com>
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
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