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2024-07-16Merge bitcoin/bitcoin#30394: net: fix race condition in self-connect detectionglozow
16bd283b3ad05daa41259a062aee0fc05b463fa6 Reapply "test: p2p: check that connecting to ourself leads to disconnect" (Sebastian Falbesoner) 0dbcd4c14855fe2cba15a32245572b693dc18c4e net: prevent sending messages in `NetEventsInterface::InitializeNode` (Sebastian Falbesoner) 66673f1c1302c986e344c7f44bb0b352213d5dc8 net: fix race condition in self-connect detection (Sebastian Falbesoner) Pull request description: This PR fixes a recently discovered race condition in the self-connect detection (see #30362 and #30368). Initiating an outbound network connection currently involves the following steps after the socket connection is established (see [`CConnman::OpenNetworkConnection`](https://github.com/bitcoin/bitcoin/blob/bd5d1688b4311e21c0e0ff89a3ae02ef7d0543b8/src/net.cpp#L2923-L2930) method): 1. set up node state 2. queue VERSION message (both steps 1 and 2 happen in [`InitializeNode`](https://github.com/bitcoin/bitcoin/blob/bd5d1688b4311e21c0e0ff89a3ae02ef7d0543b8/src/net_processing.cpp#L1662-L1683)) 3. add new node to vector `m_nodes` If we connect to ourself, it can happen that the sent VERSION message (step 2) is received and processed locally *before* the node object is added to the connection manager's `m_nodes` vector (step 3). In this case, the self-connect remains undiscovered, as the detection doesn't find the outbound peer in `m_nodes` yet (see `CConnman::CheckIncomingNonce`). Fix this by swapping the order of 2. and 3., by taking the `PushNodeVersion` call out of `InitializeNode` and doing that in the `SendMessages` method instead, which is only called for `CNode` instances in `m_nodes`. The temporarily reverted test introduced in #30362 is readded. Fixes #30368. Thanks go to vasild, mzumsande and dergoegge for suggestions on how to fix this (see https://github.com/bitcoin/bitcoin/issues/30368#issuecomment-2200625017 ff. and https://github.com/bitcoin/bitcoin/pull/30394#discussion_r1668290789). ACKs for top commit: naiyoma: tested ACK [https://github.com/bitcoin/bitcoin/pull/30394/commits/16bd283b3ad05daa41259a062aee0fc05b463fa6](https://github.com/bitcoin/bitcoin/pull/30394/commits/16bd283b3ad05daa41259a062aee0fc05b463fa6), built and tested locally, test passes successfully. mzumsande: ACK 16bd283b3ad05daa41259a062aee0fc05b463fa6 tdb3: ACK 16bd283b3ad05daa41259a062aee0fc05b463fa6 glozow: ACK 16bd283b3ad05daa41259a062aee0fc05b463fa6 dergoegge: ACK 16bd283b3ad05daa41259a062aee0fc05b463fa6 Tree-SHA512: 5b8aced6cda8deb38d4cd3fe4980b8af505d37ffa0925afaa734c5d81efe9d490dc48a42e1d0d45dd2961c0e1172a3d5b6582ae9a2d642f2592a17fbdc184445
2024-07-09net: fix race condition in self-connect detectionSebastian Falbesoner
Initiating an outbound network connection currently involves the following steps after the socket connection is established (see `CConnman::OpenNetworkConnection` method): 1. set up node state 2. queue VERSION message 3. add new node to vector `m_nodes` If we connect to ourself, it can happen that the sent VERSION message (step 2) is received and processed locally *before* the node object is added to the connection manager's `m_nodes` vector (step 3). In this case, the self-connect remains undiscovered, as the detection doesn't find the outbound peer in `m_nodes` yet (see `CConnman::CheckIncomingNonce`). Fix this by swapping the order of 2. and 3., by taking the `PushNodeVersion` call out of `InitializeNode` and doing that in the `SendMessages` method instead, which is only called for `CNode` instances in `m_nodes`. Thanks go to vasild, mzumsande, dergoegge and sipa for suggestions on how to fix this.
2024-07-05refactor: Use designated initializerHodlinator
Block was recently touched (e2d1f84858485650ff743753ffa5c679f210a992) and the codebase recently switched to C++20 which allows this to improve robustness.
2024-07-01random: make GetRand() support entire range (incl. max)Pieter Wuille
The existing code uses GetRand(nMax), with a default value for nMax, where nMax is the range of values (not the maximum!) that the output is allowed to take. This will always miss the last possible value (e.g. GetRand<uint32_t>() will never return 0xffffffff). Fix this, by moving the functionality largely in RandomMixin, and also adding a separate RandomMixin::rand function, which returns a value in the entire (non-negative) range of an integer.
2023-11-20refactor: NetMsg::Make() without nVersionMarcoFalke
The nVersion field is unused, so remove it. This is also required for future commits. Also, add PushMessage aliases in PeerManagerImpl to make calling code less verbose. Co-Authored-By: Anthony Towns <aj@erisian.com.au>
2023-10-30Allow unit tests to access additional CConnman membersJon Atack
that are otherwise private: - CConnman::m_nodes - CConnman::ConnectNodes() - CConnman::AlreadyConnectedToAddress() and update the #include headers per iwyu.
2023-09-14scripted-diff: use SER_PARAMS_OPFUNCAnthony Towns
-BEGIN VERIFY SCRIPT- sed -i 's/WithParams(\(CAddress::V[12]_[A-Z]*\) *, */\1(/g' $(git grep -l 'WithParams' src/) sed -i 's/WithParams(\(CNetAddr::V[12]\) *, */\1(/g' $(git grep -l 'WithParams' src/) sed -i 's@\(CNetAddr::V1.CService{}.*\) //@\1 //@' src/test/util/net.cpp -END VERIFY SCRIPT-
2023-09-07net: add have_next_message argument to Transport::GetBytesToSend()Pieter Wuille
Before this commit, there are only two possibly outcomes for the "more" prediction in Transport::GetBytesToSend(): * true: the transport itself has more to send, so the answer is certainly yes. * false: the transport has nothing further to send, but if vSendMsg has more message(s) left, that still will result in more wire bytes after the next SetMessageToSend(). For the BIP324 v2 transport, there will arguably be a third state: * definitely not: the transport has nothing further to send, but even if vSendMsg has more messages left, they can't be sent (right now). This happens before the handshake is complete. To implement this, we move the entire decision logic to the Transport, by adding a boolean to GetBytesToSend(), called have_next_message, which informs the transport whether more messages are available. The return values are still true and false, but they mean "definitely yes" and "definitely no", rather than "yes" and "maybe".
2023-09-05Use serialization parameters for CAddress serializationMarcoFalke
This also cleans up the addrman (de)serialization code paths to only allow `Disk` serialization. Some unit tests previously forced a `Network` serialization, which does not make sense, because Bitcoin Core in production will always `Disk` serialize. This cleanup idea was suggested by Pieter Wuille and implemented by Anthony Towns. Co-authored-by: Pieter Wuille <pieter@wuille.net> Co-authored-by: Anthony Towns <aj@erisian.com.au>
2023-08-23net: move message conversion to wire bytes from PushMessage to SocketSendDataPieter Wuille
This furthers transport abstraction by removing the assumption that a message can always immediately be converted to wire bytes. This assumption does not hold for the v2 transport proposed by BIP324, as no messages can be sent before the handshake completes. This is done by only keeping (complete) CSerializedNetMsg objects in vSendMsg, rather than the resulting bytes (for header and payload) that need to be sent. In SocketSendData, these objects are handed to the transport as permitted by it, and sending out the bytes the transport tells us to send. This also removes the nSendOffset member variable in CNode, as keeping track of how much has been sent is now a responsability of the transport. This is not a pure refactor, and has the following effects even for the current v1 transport: * Checksum calculation now happens in SocketSendData rather than PushMessage. For non-optimistic-send messages, that means this computation now happens in the network thread rather than the message handler thread (generally a good thing, as the message handler thread is more of a computational bottleneck). * Checksum calculation now happens while holding the cs_vSend lock. This is technically unnecessary for the v1 transport, as messages are encoded independent from one another, but is untenable for the v2 transport anyway. * Statistics updates about per-message sent bytes now happen when those bytes are actually handed to the OS, rather than at PushMessage time.
2023-08-23net: abstract sending side of transport serialization furtherPieter Wuille
This makes the sending side of P2P transports mirror the receiver side: caller provides message (consisting of type and payload) to be sent, and then asks what bytes must be sent. Once the message has been fully sent, a new message can be provided. This removes the assumption that P2P serialization of messages follows a strict structure of header (a function of type and payload), followed by (unmodified) payload, and instead lets transports decide the structure themselves. It also removes the assumption that a message must always be sent at once, or that no bytes are even sent on the wire when there is no message. This opens the door for supporting traffic shaping mechanisms in the future.
2023-08-23refactor: merge transport serializer and deserializer into Transport classPieter Wuille
This allows state that is shared between both directions to be encapsulated into a single object. Specifically the v2 transport protocol introduced by BIP324 has sending state (the encryption keys) that depends on received messages (the DH key exchange). Having a single object for both means it can hide logic from callers related to that key exchange and other interactions.
2023-03-28Merge bitcoin/bitcoin#27324: net: #27257 follow-upsfanquake
cd0c8eeb0940790b6ba83786d1c9e362d4dc4829 [net] Pass nRecvFloodSize to CNode (dergoegge) 860402ef2ed728ef096dda4e65e77d566782209f [net] Remove trivial GetConnectionType() getter (dergoegge) b5a85b365a4abd98176b0935015dbb502cc3e6f6 [net] Delete CNetMessage copy constructor/assignment op (dergoegge) Pull request description: Follow-up PR for #27257 * Deletes the copy constructor/assignment operator of `CNetMessage` * Removes trivial getter for the connection type * Avoids passing `nRecvFloodSize` to CNode methods by passing it to `CNode` on creation ACKs for top commit: jnewbery: utACK cd0c8eeb0940790b6ba83786d1c9e362d4dc4829 theStack: ACK cd0c8eeb0940790b6ba83786d1c9e362d4dc4829 Tree-SHA512: 673a758668617f69fba77e61f0eaa1538da27a4849c82c98742436692baa2d7f001129af3e7a66b160e599d12109dac08137a146f10ff9b9ebdc5c2237311d41
2023-03-27[net] Pass nRecvFloodSize to CNodedergoegge
2023-03-27Merge bitcoin/bitcoin#26642: clang-tidy: Add more `performance-*` checks and ↵fanquake
related fixes 03ec5b6f9ca3af28c9ce25cf2393e28ae852d808 clang-tidy: Exclude `performance-*` checks rather including them (Hennadii Stepanov) 24004372302adfc0e7cb36f8db6830694bf050e9 clang-tidy: Add `performance-type-promotion-in-math-fn` check (Hennadii Stepanov) 7e975e6cf86617346c1d8e2568f74a0252c03857 clang-tidy: Add `performance-inefficient-vector-operation` check (Hennadii Stepanov) 516b75f66ec3ba7495fc028c750937bd66cc9bba clang-tidy: Add `performance-faster-string-find` check (Hennadii Stepanov) Pull request description: ACKs for top commit: martinus: ACK 03ec5b6f9ca3af28c9ce25cf2393e28ae852d808 TheCharlatan: re-ACK [03ec5b6](https://github.com/bitcoin/bitcoin/pull/26642/commits/03ec5b6f9ca3af28c9ce25cf2393e28ae852d808) Tree-SHA512: 2dfa52f9131da88826f32583bfd534a56a998477db9804b7333c0e7ac0b6b36141009755c7163b9f95d0ecbf5c2cb63f8a69ce4b114bb83423faed21b50cec67
2023-03-26clang-tidy: Add `performance-inefficient-vector-operation` checkHennadii Stepanov
https://clang.llvm.org/extra/clang-tidy/checks/performance/inefficient-vector-operation.html
2023-03-19[net] Deduplicate marking received message for processingdergoegge
2023-01-30net: simplify the call to vProcessMsg.splice()Vasil Dimov
At the time when ```cpp pnode->vProcessMsg.splice(pnode->vProcessMsg.end(), pnode->vRecvMsg, pnode->vRecvMsg.begin(), it); ``` is called, `it` is certainly `pnode->vRecvMsg.end()` which makes the call equivalent to: ```cpp pnode->vProcessMsg.splice(pnode->vProcessMsg.end(), pnode->vRecvMsg, pnode->vRecvMsg.begin(), pnode->vRecvMsg.end()); ``` which is equivalent to: ```cpp pnode->vProcessMsg.splice(pnode->vProcessMsg.end(), pnode->vRecvMsg); ``` Thus, use the latter. Further, maybe irrelevant, but the latter has constant complexity while the original code is `O(length of vRecvMsg)`.
2022-12-24scripted-diff: Bump copyright headersHennadii Stepanov
-BEGIN VERIFY SCRIPT- ./contrib/devtools/copyright_header.py update ./ -END VERIFY SCRIPT- Commits of previous years: - 2021: f47dda2c58b5d8d623e0e7ff4e74bc352dfa83d7 - 2020: fa0074e2d82928016a43ca408717154a1c70a4db - 2019: aaaaad6ac95b402fe18d019d67897ced6b316ee0
2022-09-15net: drop cs_sendProcessingAnthony Towns
SendMessages() is now protected g_msgproc_mutex; so this additional per-node mutex is redundant.
2022-09-01net: make CNode::m_permissionFlags constAnthony Towns
2022-07-14[net processing] Remove CNode::nLocalServicesJohn Newbery
2022-07-14[net processing] Remove CNode::nServicesJohn Newbery
Use Peer::m_their_services instead
2022-07-14[net processing] Add m_our_services and m_their_services to PeerJohn Newbery
Track services offered by us and the peer in the Peer object.
2022-07-12move-only: InitializeNode to handshake helperMacroFake
2022-07-12move-only: Version handshake to libtest_utilMacroFake
2022-07-06[net] Move eviction logic to its own filedergoegge
2022-07-04[net] Add connection type to NodeEvictionCandidatedergoegge
2022-07-04[net] Add NoBan status to NodeEvictionCandidatedergoegge
2022-03-18scripted-diff: rename TxRelay membersJohn Newbery
-BEGIN VERIFY SCRIPT- ren() { sed -i "s:\<$1\>:$2:g" $(git grep -l "\<$1\>" ./src ./test); } ren cs_filter m_bloom_filter_mutex ren fRelayTxes m_relay_txs ren pfilter m_bloom_filter ren cs_tx_inventory m_tx_inventory_mutex ren filterInventoryKnown m_tx_inventory_known_filter ren setInventoryTxToSend m_tx_inventory_to_send ren fSendMempool m_send_mempool ren nNextInvSend m_next_inv_send_time ren minFeeFilter m_fee_filter_received ren lastSentFeeFilter m_fee_filter_sent -END VERIFY SCRIPT-
2021-12-30scripted-diff: Bump copyright headersHennadii Stepanov
-BEGIN VERIFY SCRIPT- ./contrib/devtools/copyright_header.py update ./ -END VERIFY SCRIPT- Commits of previous years: * 2020: fa0074e2d82928016a43ca408717154a1c70a4db * 2019: aaaaad6ac95b402fe18d019d67897ced6b316ee0
2021-12-13scripted-diff: Rename touched member variablesMarcoFalke
-BEGIN VERIFY SCRIPT- ren() { sed -i "s/\<$1\>/$2/g" $( git grep -l "$1" ./src/ ) ; } ren nLastBlockTime m_last_block_time ren nLastTXTime m_last_tx_time ren nTimeConnected m_connected -END VERIFY SCRIPT-
2021-12-13refactor: Use type-safe std::chrono in netMarcoFalke
2021-11-19scripted-diff: Use clang-tidy syntax for C++ named argumentsMarcoFalke
-BEGIN VERIFY SCRIPT- perl -0777 -pi -e 's:((\(|\{|,)(\n| )*)\/\* ?([^=* ]+) ?\*\/ ?:\1/*\4=*/:g' $( git ls-files ./src/test ./src/wallet/test ) -END VERIFY SCRIPT-
2021-07-06refactor: move GetRandomNodeEvictionCandidates() to test utilitiesJon Atack
Co-authored-by: Vasil Dimov <vd@FreeBSD.org>
2020-11-20net: Treat raw message bytes as uint8_tMarcoFalke
2020-10-02net: Use Span in ReceiveMsgBytesMarcoFalke
2020-04-05fuzz: Add process_messages harnessMarcoFalke
generated by cgit v1.2.3 (git 2.26.2) at 2025-03-17 16:31:17 +0000