This introduces several options for public node operators to limit their
nodes usage by 3rd parties, this is aimed at usage of resource-hungry
areas.
We allow limiting the amount of connections any single IP can keep open
with us.
We limit the amount of reconnects we allow in a short number of seconds.
We allow limiting the number of addresses (or scriptHashes) a peer can
register for the node to scan.
The last one is for both the addressMonitorService as well as for the
getBlock filters.
For node operators these items become available using command line
options or config-file options. By default these limits are unlimited as
we assume default usage to be private.
This implements the sendTransaction command using the async framework,
allowing clients to benefit from multi-core systems to process
transactions in parallel when being submitted to the Hub.
This fixes the logic that finds out it should resume an interrupted
process. The code had false positives in case of a message split over
multiple TCP frames.
The NetworkManager now has more mature flow-control which means that we
send our buffers more regularly and we delay parsing received data if the
sending takes too long.
The direct effect should be that creating of a large number of messages
in response to incoming messages is no longer a problem in many cases.
The asio stuff is quite broken when it comes to, ironically,
concurrency.
Connecting to peers lead to lots of 'canceled' (sic) errors being
generated internally in asio and other such issues.
Even though they were called on separate objects.
Adding a mutex around the async_connect calls made the amount of
failures go down dramatically.
This patch also includes upgrading boost::mutex to the std-lib
versions.
Avoid deleting and creating connections, which is really a rather rare
event anyway, and simply remember the connection object and reuse it
when a new one is requested.
The NetworkManager usage was mostly for low connection counts and this
made defaults selection easy.
With more usages it is important to allow the NWM-connection to be more
configurable about memory usage and leaner in general.
This changes the headers-buffers (used to create envelopes) to not be per
connection anymore but per thread using the tread_local keyword.
This changes the ring-buffers to become configurable using
NetworkConnections::setMessageQueueSizes().
Also removing some include statements where they were not really needed
in the P2PNet lib.
This changes handling to also remove peers that fail with:
"Cannot assign requested address"
An error seen in a Docker container on a system supporting IPv6.
Additionally we now always assign a error level so an unknown error will
still cause the node to be banned after 5 attempts.
Allow user to shutdown a connection, making it instantly invalid.
Allow user to register a callback for errors.
And fix pinging to be disabled on legacyP2P style connections.
The API changes in boost between 1.66 and later was the need
for the boost_compat.h header file.
Its been a long time since Flowee started demanding 1.67 minimum
for boost, making this compat obsolete.
Move some globals and all stuff pulling in crypto to the
server/serverutil.cpp file
Remove dead code.
Move several items that were used in only one place to the respective
files using them.
Move the class WaitUntilFinishedHelper into its own file.
Made sure no header includes utils.h
remove a handfull of files including utils.h for nothing.
tomFlowee
TomZ