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We'll soon no longer have access to vRecvMsg, and this is more intuitive anyway.
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when vRecvMsg becomes a private buffer, it won't make sense to allow other
threads to mess with it anymore.
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These conditions are problematic to check without locking, and we shouldn't be
relying on the refcount to disconnect.
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Surprisingly this hasn't been causing me any issues while testing, probably
because it requires lots of large blocks to be flying around.
Send/Recv corks need tests!
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67ee4ec net: misc header cleanups (Cory Fields)
8b3159e net: make proxy receives interruptible (Cory Fields)
5cb0fce net: remove thread_interrupted catch (Cory Fields)
d3d7056 net: make net processing interruptible (Cory Fields)
0985052 net: make net interruptible (Cory Fields)
799df91 net: add CThreadInterrupt and InterruptibleSleep (Cory Fields)
7325b15 net: a few small cleanups before replacing boost threads (Cory Fields)
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Also now that net threads are interruptible, switch them to use std
threads/binds/mutexes/condvars.
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- Drop the interruption point directly after the pnode allocation. This would
be leaky if hit.
- Rearrange thread creation so that the socket handler comes first
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Edited via:
$ contrib/devtools/copyright_header.py update .
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Swap mapMultiArgs for a const-reference to a _mapMultiArgs which is
only accessed in util.cpp
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bdb922b Remove pnodeLocalHost. (Gregory Maxwell)
083f203 Remove fNetworkNode. (Gregory Maxwell)
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dfed983 Fix unlocked access to vNodes.size() (Matt Corallo)
3033522 Remove double brackets in addrman (Matt Corallo)
dbfaade Fix AddrMan locking (Matt Corallo)
047ea10 Make fImporting an std::atomic (Matt Corallo)
42071ca Make fDisconnect an std::atomic (Matt Corallo)
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Mostly a legacy of the long removed pub/sub system.
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Matt pointed out to me that this appeared to be doing nothing (except involving itself in data races).
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This fixes one of the last major layer violations in the networking stack.
The network side is no longer in charge of message serialization, so it is now
decoupled from Bitcoin structures. Only the header is serialized and attached
to the payload.
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19f46f1 Qt: New network_disabled icon (Luke Dashjr)
54cf997 RPC/Net: Use boolean consistently for networkactive, and remove from getinfo (Luke Dashjr)
b2b33d9 Overhaul network activity toggle (Jonas Schnelli)
32efa79 Qt: Add GUI feedback and control of network activity state. (Jon Lund Steffensen)
e38993b RPC: Add "togglenetwork" method to toggle network activity temporarily (Jon Lund Steffensen)
7c9a98a Allow network activity to be temporarily suspended. (Jon Lund Steffensen)
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fe1dc62 Hash P2P messages as they are received instead of at process-time (Matt Corallo)
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d32036a Use RelevantServices instead of node_network in AttemptToEvict. (Gregory Maxwell)
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This is now handled properly in realtime.
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Drop all of the old stuff.
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The changes here are dense and subtle, but hopefully all is more explicit
than before.
- CConnman is now in charge of sending data rather than the nodes themselves.
This is necessary because many decisions need to be made with all nodes in
mind, and a model that requires the nodes calling up to their manager quickly
turns to spaghetti.
- The per-node-serializer (ssSend) has been replaced with a (quasi-)const
send-version. Since the send version for serialization can only change once
per connection, we now explicitly tag messages with INIT_PROTO_VERSION if
they are sent before the handshake. With this done, there's no need to lock
for access to nSendVersion.
Also, a new stream is used for each message, so there's no need to lock
during the serialization process.
- This takes care of accounting for optimistic sends, so the
nOptimisticBytesWritten hack can be removed.
- -dropmessagestest and -fuzzmessagestest have not been preserved, as I suspect
they haven't been used in years.
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Use of node_network here is really meant to be a proxy of "likely to
send us blocks in the future". RelevantServices is the right criteria
now.
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fa1c3c2 [net] Remove assert(nMaxInbound > 0) (MarcoFalke)
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Otherwise it just responds to this obvious bit of configuration by
trying to connect to "0" in a loop.
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nMaxInbound might very well be 0 or -1, if the user prefers to keep
a small number of maxconnections.
Note: nMaxInbound of -1 means that the user set maxconnections
to 8 or less, but we still want to keep an additional slot for
the feeler connection.
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Add getNetworkActive()/setNetworkActive() method to client model.
Send network active status through NotifyNetworkActiveChanged.
Indicate in tool tip of gui status bar network indicator whether network activity is disabled.
Indicate in debug window whether network activity is disabled and add button to allow user to toggle network activity state.
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Added the function SetNetworkActive() which when called with argument set to false disconnects all nodes and sets the flag fNetworkActive to false. As long as this flag is false no new connections are attempted and no incoming connections are accepted. Network activity is reenabled by calling the function with argument true.
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services.
4630479 Make dnsseed's definition of acute need include relevant services. (Gregory Maxwell)
9583477 Be more aggressive in connecting to peers with relevant services. (Gregory Maxwell)
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We normally prefer to connect to peers offering the relevant services.
If we're not connected to enough peers with relevant services, we
probably don't know about them and could use dnsseed's help.
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5eaaa83 Kill insecure_random and associated global state (Wladimir J. van der Laan)
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1724a40 Display minimum ping in debug window. (R E Broadley)
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Only allow skipping relevant services until there are four outbound
connections up.
This avoids quickly filling up with peers lacking the relevant
services when addrman has few or none of them.
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This value can be significantly higher if the users uses addnode
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There are only a few uses of `insecure_random` outside the tests.
This PR replaces uses of insecure_random (and its accompanying global
state) in the core code with an FastRandomContext that is automatically
seeded on creation.
This is meant to be used for inner loops. The FastRandomContext
can be in the outer scope, or the class itself, then rand32() is used
inside the loop. Useful e.g. for pushing addresses in CNode or the fee
rounding, or randomization for coin selection.
As a context is created per purpose, thus it gets rid of
cross-thread unprotected shared usage of a single set of globals, this
should also get rid of the potential race conditions.
- I'd say TxMempool::check is not called enough to warrant using a special
fast random context, this is switched to GetRand() (open for
discussion...)
- The use of `insecure_rand` in ConnectThroughProxy has been replaced by
an atomic integer counter. The only goal here is to have a different
credentials pair for each connection to go on a different Tor circuit,
it does not need to be random nor unpredictable.
- To avoid having a FastRandomContext on every CNode, the context is
passed into PushAddress as appropriate.
There remains an insecure_random for test usage in `test_random.h`.
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Rather than doing a circle and re-resolving the node's IP, just use the one
from nodestats directly.
This requires syncing the addr field from CNode.
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In principle, the checksums of P2P packets are simply 4-byte blobs which
are the first four bytes of SHA256(SHA256(payload)).
Currently they are handled as little-endian 32-bit integers half of the
time, as blobs the other half, sometimes copying the one to the other,
resulting in somewhat confused code.
This PR changes the handling to be consistent both at packet creation
and receiving, making it (I think) easier to understand.
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d9ff591 Move static global randomizer seeds into CConnman (Pieter Wuille)
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f3552da net: fix maxuploadtarget setting (Cory Fields)
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