- objectsKnownToThem is supposed to track if it's necessary to send inv
commands to a peer
- it is supposed to enter garbage collection after 1 hour
(ObjectTracker.trackingExpires)
- due to peer not announcing all objects, or announcing them before we
announce, this contains excessive number of entries after connection
is fully established.
- profiling revealed that this creates unnecessary memory to be kept
allocated
- this patch will prevent tracking of entries sent during bigInv,
reducing the memory "leak"
- it is possible, in theory, that this does have some negative effect,
like increased bandwidth or neglecting to announce some invs. It
probably doesn't though as my review of objectsKnownToThem occurrences
didn't reveal any such case, and since the dict didn't track fully
accurately anyway (so it would have already been broken if it was a
problem), I consider it an acceptable risk at the moment. If it indeed
causes problems, they can be solved separately
- I tested this on one of the bootstrap servers with little memory, and
it increased the number of connections than can be handled by a factor
of about 3.5
- dandelion fixes
- try to wait as long as possible before expiration if there are no
outbound connections
- expire in invThread rather than singleCleaner thread
- deduplication of code in inv and dinv command methods
- turn on by default, seems to work correctly now
- turn off dandelion if outbound connections are disabled
- start tracking downloads earlier, and faster download loop
- remove some obsolete lines
- minor PEP8 updates
- will try to report "Server full" over protocol for 10 extra
connections over limit, instead of simply dropping them
- if connected to the same host inbound and outbound, handle as server
full (prevents duplicate connections)
- fixes and feedback from @gfanti and @amiller
- addresses #1049
- minor refactoring
- two global child stems with fixed mapping between parent and
child stem
- allow child stems which don't support dandelion
- only allow outbound connections to be stems
- adjust stems if opening/closing outbound connections (should
allow partial dandelion functionality when not enough outbound
connections are available instead of breaking)
- get rid of per-connection writeQueue/receiveQueue, and instead use
strings and locking
- minor code cleanup
- all state handlers now should set expectBytes
- almost all data processing happens in ReceiveDataThread, and
AsyncoreThread is almost only I/O (plus TLS). AsyncoreThread simply
puts the connection object into the queue when it has some data for
processing
- allow poll, epoll and kqueue handlers. kqueue is untested and
unoptimised, poll and epoll seem to work ok (linux)
- stack depth threshold handler in decode_payload_content, this is
recursive and I think was causing occasional RuntimeErrors. Fixes#964
- longer asyncore loops, as now data is handled in ReceiveDataThread
- randomise node order when deciding what to download. Should prevent
retries being stuck to the same node
- socks cleanup (socks5 works ok, socks4a untested but should work too)
- implemented by ignoring getdata during the delay rather than sleeping
as it was in the threaded model
- it can happen that a valid getdata request is received during the
delay. A node should be implemented in a way that retries to download,
that may not be the case with older PyBitmessage versions or other
implementations
- outbound peers now have a rating
- it's also shown in the network status tab
- currently it's between -1 to +1, changes by 0.1 steps and uses a
hyperbolic function 0.05/(1.0 - rating) to convert rating to
probability with which we should connect to that node when randomly
chosen
- it increases when we successfully establish a full outbound connection
to a node, and decreases when we fail to do that
- onion nodes have priority when using SOCKS
- should prevent the same object being re-requested indefinitely
- locking for object tracking
- move SSL-specific error handling to TLSDispatcher
- observe maximum connection limit when accepting a new connection
- stack depth test (for debugging purposes)
- separate download thread
- connection pool init moved to main thread
- asyncore is now on by default
- inv announcements implemented
- bandwidth limit implemented / fixed
- stats on download / upload speed now work
- make prints into logger
- limit knownNodes to 20k as it was before
- green light fixed
- other minor fixes
- bm headers and commands are only read up to expected length.
On a very fast connection (e.g. local VM), reading verack
also read a part of the TLS handshake
- some debugging info moved from print to logger.debug
- tls handshake cleanup
- bugfixes
- UDP socket for local peer discovery
- new function assembleAddr to unify creating address command
- open port checker functionality (inactive)
- sendBigInv is done in a thread separate from the network IO
thread
