"Iterators pointing to an element between the new logical end and the physical
end of the range are still dereferenceable, but the elements themselves have
unspecified values (as per MoveAssignable post-condition)."
- http://en.cppreference.com/w/cpp/algorithm/remove
* A value should be considered announced if all good nodes up to a count of
TARGET_NODES have been tried in the search .
* Bug fix where SearchNode::isAnnounced criteria was not consistent with
announce operation.
The op token is renewed regularly (around every 30 minutes),
so SHA256 provides enough security for this non-sensitive token.
SHA256 takes 32 bytes instead of 64 bytes for SHA512,
and the token is included in every listen requests,
renewed every 30 seconds, and every answer to get.
In the context of limited bandwith usage, using SHA256 seems more appropriate.
This change is backward and forward compatible.
After a connectivity change, the DHT would enter the "connecting" state in order
to try to resolve good nodes. However, the previous algorithm would
probabilistically increase time for completion each time a node would fail to
resolve. We now avoid this by prioritizing non-expired nodes in the process.
Also, a subtle error would sensibly stop the process for 30 minutes due to using
the Node::NODE_EXPIRE_TIME constant instead of Node::MAX_RESPONSE_TIME.
We used to send values once to a given node,
however the receiving node may have canceled
or dropped the request since then,
so we now send the values for every socket and
the optimization will happen on the sending side.
Since the initial implementation of listen operation, multiple listen requests
from a single node on a same hash was not possible without singular
inconsistencies. The flaw was coming from the fact that nodes receiving listen
request could not differentiate between listen refresh request and a new
independent listen request.
This patch introduces the new net::Socket structure which in time will enable
remote nodes to send update for a storage while differentiating between
concurrent listen requests. A socket has a unique identifier which consists of a
transaction id as defined in the OpenDHT protocol.
Adrien Béraud
Simon Désaulniers
Simon Désaulniers
Istvan
Istvan