0) Adjust BIP16 & BIP30 enforcement values
1) Reduce amount that peers can adjust our time to eliminate an attack vector. Thanks to
coblee for this fix.
2) Zeitgeist2 patch - thanks to Lolcust and ArtForz. This fixes an issue where a
51% attack can change difficulty at will. Go back the full period unless it's the
first retarget after genesis.
3) Avoid overflow in CalculateNextWorkRequired(). Thanks to pooler for the overflow fix.
4) SegWit ContextualCheckBlockHeader adjustment and extra coverage
5) Reject peer proto version below 70002. Thanks to wtogami for this patch.
6) Adjust default settings for Litecoin
4fcb915 Update release notes for 0.15.1 (MeshCollider)
Pull request description:
Adds info for the more notable changes since 0.15.0.1 to the release notes.
~Still needs the list of commits added too.~ (added in 2ce9e586d5)
Tree-SHA512: 54d30b1f0105d0d9d86a0dba017471bfa13b6bdd39fc4ee785cb515958c0f72874fb2d1e967076ac61762a16ff7b23b0eebc016f2ab0fb0aa9d6941fd6662042
8195cb0d7 rpc: further constrain the libevent workaround (Cory Fields)
34153a7e4 rpc: work-around an upstream libevent bug (Cory Fields)
fc308a6cd Add unit test for stale tip checking (Suhas Daftuar)
2ed0647ac Add CConnmanTest to mutate g_connman in tests (João Barbosa)
a607a95d8 Connect to an extra outbound peer if our tip is stale (Suhas Daftuar)
459f2db42 Track tip update time and last new block announcement from each peer (Suhas Daftuar)
49bf09018 net: Allow connecting to extra outbound peers (Suhas Daftuar)
bb83fe190 Add release notes describing blockmaxweight deprecation (Matt Corallo)
4c82cea99 Use a sensible default for blockmaxweight (Matt Corallo)
7871a7d3b Deprecate confusing blockmaxsize, fix getmininginfo output (Matt Corallo)
6baa317b5 Fix minchainwork test for 0.15 backport (Suhas Daftuar)
55b7abfa8 Make p2p-acceptablock not an extended test (Matt Corallo)
5bec7744d [qa] test that invalid blocks on an invalid chain get a disconnect (Matt Corallo)
92d6105c4 Reject headers building on invalid chains by tracking invalidity (Matt Corallo)
51001d684 Accept unrequested blocks with work equal to our tip (Matt Corallo)
c6e4d0ce8 Stop always storing blocks from whitelisted peers (Matt Corallo)
e976c36dd Rewrite p2p-acceptblock in preparation for slight behavior changes (Matt Corallo)
ec8dedff4 net: Add missing lock in ProcessHeadersMessage(...) (practicalswift)
59b210d9a Disconnect outbound peers relaying invalid headers (Suhas Daftuar)
fc966bbd2 moveonly: factor out headers processing into separate function (Suhas Daftuar)
e3272242e Add unit test for outbound peer eviction (Suhas Daftuar)
9961abf9e Permit disconnection of outbound peers on bad/slow chains (Suhas Daftuar)
bf191a718 Disconnecting from bad outbound peers in IBD (Suhas Daftuar)
d570aa429 Fix uninitialized g_connman crash in Shutdown() (MeshCollider)
0a5477c7e net: stop both net/net_processing before destroying them (Cory Fields)
b4136f21c net: drop unused connman param (Cory Fields)
dc897e53d net: use an interface class rather than signals for message processing (Cory Fields)
8aee55af3 net: pass CConnman via pointer rather than reference (Cory Fields)
6f279652b Rename fAddnode to a more-descriptive "manual_connection" (Matt Corallo)
ffb6ea4e5 Add comment explaining forced processing of compact blocks (Suhas Daftuar)
2df65eeb9 qa: add test for minchainwork use in acceptblock (Suhas Daftuar)
3acec3878 Don't process unrequested, low-work blocks (Suhas Daftuar)
0e9d04bf0 [qa] Test nMinimumChainWork (Suhas Daftuar)
da4908c3a Allow setting nMinimumChainWork on command line (Suhas Daftuar)
41088795d qa: Remove never used return value of sync_with_ping (MarcoFalke)
f3457d0e8 qa: Make tmpdir option an absolute path (MarcoFalke)
9c8006dc3 Avoid opening copied wallet databases simultaneously (Russell Yanofsky)
de7053f11 [wallet] Fix leak in CDB constructor (João Barbosa)
fd79ed6b2 Ensure backupwallet fails when attempting to backup to source file (Tomas van der Wansem)
d94fc336c scripted-diff: rename assert_raises_jsonrpc to assert_raises_rpc error (John Newbery)
623de0acb [tests] do not allow assert_raises_message to be called with JSONRPCException (John Newbery)
5b728c8e9 [tests] remove direct testing on JSONRPCException from individual test cases (John Newbery)
Pull request description:
Tree-SHA512: 9fdb5c47844a899271023d8d445f7fc728e3ad71916490cd9783464684967594b07cda05dd644b722bfcea9fade74d06cfc501e1a68abf118d6d03fbbf7d7707
A rare race condition may trigger while awaiting the body of a message, see
upsteam commit 5ff8eb26371c4dc56f384b2de35bea2d87814779 for details.
This may fix some reported rpc hangs/crashes.
Github-Pull: #11593
Rebased-From: 6b58360f9b
If our tip hasn't updated in a while, that may be because our peers are
not relaying blocks to us that we would consider valid. Allow connection
to an additional outbound peer in that circumstance.
Also, periodically check to see if we are exceeding our target number of
outbound peers, and disconnect the one which has least recently
announced a new block to us (choosing the newest such peer in the case
of tie).
Github-Pull: #11560
Rebased-From: ac7b37cd2b
No sensible user will ever keep the default settings here, so not
having sensible defaults only serves to screw users who are
paying less attention, which makes for terrible defaults.
Github-Pull: #11100
Rebased-From: 3dc263c9b9
* This removes block-size-limiting code in favor of GBT clients
doing the limiting themselves (if at all).
* -blockmaxsize is deprecated and only used to calculate an implied
blockmaxweight, addressing confusion from multiple users.
* getmininginfo's currentblocksize return value was returning
garbage values, and has been removed, also removing a
GetSerializeSize call in some block generation inner loops and
potentially addressing some performance edge cases.
Github-Pull: #11100
Rebased-From: ba206d2c63
This tracks the set of all known invalid-themselves blocks (ie
blocks which we attempted to connect but which were found to be
invalid). This is used to cheaply check if new headers build on an
invalid chain.
While we're at it we also resolve an edge-case in invalidateblock
on pruned nodes which results in them needing a reindex if they
fail to reorg.
Github-Pull: #11531
Rebased-From: 015a5258ad
This is a simple change that makes our accept requirements the
same as our request requirements, (ever so slightly) further
decoupling our consensus logic from our FindNextBlocksToDownload
logic in net_processing.
Github-Pull: #11531
Rebased-From: 932f118e6a
There is no reason to wish to store blocks on disk always just
because a peer is whitelisted. This appears to be a historical
quirk to avoid breaking things when the accept limits were added.
Github-Pull: #11531
Rebased-From: 3d9c70ca0f
Removes checking whitelisted behavior (which will be removed, the
difference in behavior here makes little sense) and no longer
requires that blocks at the same work as our tip be dropped if not
requested (in part because we *do* request those blocks).
Github-Pull: #11531
Rebased-From: 3b4ac43bc3
Reading the variable mapBlockIndex requires holding the mutex cs_main.
The new "Disconnect outbound peers relaying invalid headers" code
added in commit 37886d5e2f and merged
as part of #11568 two days ago did not lock cs_main prior to accessing
mapBlockIndex.
Github-Pull: #11578
Rebased-From: 2530bf27b7
ProcessMessages will now return earlier when processing headers
messages, rather than continuing on (and do nothing).
Github-Pull: #11568
Rebased-From: 4637f18522
Currently we have no rotation of outbound peers. If an outbound peer
stops serving us blocks, or is on a consensus-incompatible chain with
less work than our tip (but otherwise valid headers), then we will never
disconnect that peer, even though that peer is using one of our 8
outbound connection slots. Because we rely on our outbound peers to
find an honest node in order to reach consensus, allowing an
incompatible peer to occupy one of those slots is undesirable,
particularly if it is possible for all such slots to be occupied by such
peers.
Protect against this by always checking to see if a peer's best known
block has less work than our tip, and if so, set a 20 minute timeout --
if the peer is still not known to have caught up to a chain with as much
work as ours after 20 minutes, then send a single getheaders message,
wait 2 more minutes, and if a better header hasn't been received by then,
disconnect that peer.
Note:
- we do not require that our peer sync to the same tip as ours, just an
equal or greater work tip. (Doing otherwise would risk partitioning the
network in the event of a chain split, and is also unnecessary.)
- we pick 4 of our outbound peers and do not subject them to this logic,
to be more conservative. We don't wish to permit temporary network
issues (or an attacker) to excessively disrupt network topology.
Github-Pull: #11490
Rebased-From: 5a6d00c6de
When in IBD, we'd like to use all our outbound peers to help us
sync the chain. Disconnect any outbound peers whose headers have
insufficient work.
Github-Pull: #11490
Rebased-From: c60fd71a65
Drop boost signals in favor of a stateful class. This will allow the message
processing loop to actually move to net_processing in a future step.
Github-Pull: #10756
Rebased-From: 8ad663c1fa
There are a few too many edge-cases here to make this a scripted diff.
The following commits will move a few functions into PeerLogicValidation, where
the local connman instance can be used. This change prepares for that usage.
Github-Pull: #10756
Rebased-From: 28f11e9406
A peer could try to waste our resources by sending us unrequested blocks with
low work, eg to fill up our disk. Since
e2652002b6 we no longer request blocks until we
know we're on a chain with more than nMinimumChainWork (our anti-DoS
threshold), but we would still process unrequested blocks that had more work
than our tip. This commit fixes that behavior.
Github-Pull: #11458
Rebased-From: ce8cd7a7da
Nodes don't consider themselves out of "initial block download" until
their active chain has more work than nMinimumChainWork.
While in initial block download, nodes won't relay blocks to their
peers, so test that this parameter functions as intended by verifying
that block relay only succeeds past a given node once its
nMinimumChainWork has been exceeded.
Github-Pull: #10357
Rebased-From: eac64bb7a3
Adrian Gallagher