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21 lines
1.2 KiB
Markdown
21 lines
1.2 KiB
Markdown
P2P and network changes
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-----------------------
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- Fix a possible leak of the originator's IP address for transactions sent with
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`sendrawtransaction` RPC when `-privatebroadcast=1`. When Bitcoin Core connects
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to a peer, if that peer has been advertised to support P2P protocol v2, then
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Bitcoin Core tries to use the v2 protocol and if that fails it retries the
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connection using the v1 protocol. When the private broadcast is about to send a
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transaction to an IPv4 or IPv6 peer it overrides the normal proxy selection and
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forces the connection through the Tor proxy (and thus through the Tor network,
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protecting the sender's IP address). However if v2 protocol is tried and it
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fails, then the v1 retry connection would be made disregarding the "override
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proxy" request, possibly making an IPv4 or IPv6 direct connection. In other
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words, for this to happen the following must be true:
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1. An IPv4 or IPv6 address has been advertised to the sender, indicating v2
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support.
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2. The sender must have Tor configured.
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3. The sender's configuration must be such that connections to IPv4 or IPv6
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are made directly (no `-proxy=` is used for IPv4 or IPv6).
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4. The recipient does not support v2 (the flags from 1. are bogus). (#35319)
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