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author | MarcoFalke <falke.marco@gmail.com> | 2021-05-09 07:01:20 +0200 |
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committer | MarcoFalke <falke.marco@gmail.com> | 2021-05-09 07:01:26 +0200 |
commit | 5925f1e652768a9502831b9ccf78d16cf3c37d29 (patch) | |
tree | 054b67cdf7a917fe6bd558879449eab1b9246950 /src | |
parent | 8d5a0583c497a67baa3db25fc4b359cf76685d83 (diff) | |
parent | 09205b33aa74e385caa2803aa6febc18ad1efa32 (diff) | |
download | bitcoin-5925f1e652768a9502831b9ccf78d16cf3c37d29.tar.xz |
Merge bitcoin/bitcoin#21872: net: Sanitize message type for logging
09205b33aa74e385caa2803aa6febc18ad1efa32 net: Clarify message header validation errors (W. J. van der Laan)
955eee76803c098978cf0bbc7f1f6d3c230544e2 net: Sanitize message type for logging (W. J. van der Laan)
Pull request description:
- Use `SanitizeString` when logging message errors to make sure that the message type is sanitized. I have checked all logging in `net.cpp`.
- For the `MESSAGESTART` error don't inspect and log header details at all: receiving invalid start bytes makes it likely that the packet isn't even formatted as valid P2P message. Logging the four unexpected start bytes (as hex) should be enough.
- Update `p2p_invalid_messages.py` test to check this.
- Improve error messages in a second commit.
Issue reported by gmaxwell.
ACKs for top commit:
MarcoFalke:
re-ACK 09205b33aa74e385caa2803aa6febc18ad1efa32 only change is log message fixup 🔂
practicalswift:
re-ACK 09205b33aa74e385caa2803aa6febc18ad1efa32
Tree-SHA512: 8fe5326af135cfcf39ea953d9074a8c966b9b85a810b06a2c45b8a745cf115de4f321e72fc769709d6bbecfc5953aab83176db6735b04c0bc6796f59272cadce
Diffstat (limited to 'src')
-rw-r--r-- | src/net.cpp | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/src/net.cpp b/src/net.cpp index f55d3e2418..ce38c140ce 100644 --- a/src/net.cpp +++ b/src/net.cpp @@ -681,19 +681,19 @@ int V1TransportDeserializer::readHeader(Span<const uint8_t> msg_bytes) hdrbuf >> hdr; } catch (const std::exception&) { - LogPrint(BCLog::NET, "HEADER ERROR - UNABLE TO DESERIALIZE, peer=%d\n", m_node_id); + LogPrint(BCLog::NET, "Header error: Unable to deserialize, peer=%d\n", m_node_id); return -1; } // Check start string, network magic if (memcmp(hdr.pchMessageStart, m_chain_params.MessageStart(), CMessageHeader::MESSAGE_START_SIZE) != 0) { - LogPrint(BCLog::NET, "HEADER ERROR - MESSAGESTART (%s, %u bytes), received %s, peer=%d\n", hdr.GetCommand(), hdr.nMessageSize, HexStr(hdr.pchMessageStart), m_node_id); + LogPrint(BCLog::NET, "Header error: Wrong MessageStart %s received, peer=%d\n", HexStr(hdr.pchMessageStart), m_node_id); return -1; } // reject messages larger than MAX_SIZE or MAX_PROTOCOL_MESSAGE_LENGTH if (hdr.nMessageSize > MAX_SIZE || hdr.nMessageSize > MAX_PROTOCOL_MESSAGE_LENGTH) { - LogPrint(BCLog::NET, "HEADER ERROR - SIZE (%s, %u bytes), peer=%d\n", hdr.GetCommand(), hdr.nMessageSize, m_node_id); + LogPrint(BCLog::NET, "Header error: Size too large (%s, %u bytes), peer=%d\n", SanitizeString(hdr.GetCommand()), hdr.nMessageSize, m_node_id); return -1; } @@ -746,7 +746,7 @@ std::optional<CNetMessage> V1TransportDeserializer::GetMessage(const std::chrono // Check checksum and header command string if (memcmp(hash.begin(), hdr.pchChecksum, CMessageHeader::CHECKSUM_SIZE) != 0) { - LogPrint(BCLog::NET, "CHECKSUM ERROR (%s, %u bytes), expected %s was %s, peer=%d\n", + LogPrint(BCLog::NET, "Header error: Wrong checksum (%s, %u bytes), expected %s was %s, peer=%d\n", SanitizeString(msg->m_command), msg->m_message_size, HexStr(Span<uint8_t>(hash.begin(), hash.begin() + CMessageHeader::CHECKSUM_SIZE)), HexStr(hdr.pchChecksum), @@ -754,8 +754,8 @@ std::optional<CNetMessage> V1TransportDeserializer::GetMessage(const std::chrono out_err_raw_size = msg->m_raw_message_size; msg = std::nullopt; } else if (!hdr.IsCommandValid()) { - LogPrint(BCLog::NET, "HEADER ERROR - COMMAND (%s, %u bytes), peer=%d\n", - hdr.GetCommand(), msg->m_message_size, m_node_id); + LogPrint(BCLog::NET, "Header error: Invalid message type (%s, %u bytes), peer=%d\n", + SanitizeString(hdr.GetCommand()), msg->m_message_size, m_node_id); out_err_raw_size = msg->m_raw_message_size; msg.reset(); } |