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Recognize also I2P addresses in the form `base32hashofpublickey.b32.i2p`
from `CNetAddr::SetSpecial()`.
This makes `Lookup()` support them, which in turn makes it possible to
manually connect to an I2P node by using
`-proxy=i2p_socks5_proxy:port -addnode=i2p_address.b32.i2p:port`
Co-authored-by: Lucas Ontivero <lucasontivero@gmail.com>
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39b43298d9c54f9c18bef36f3d5934f57aefd088 test: add test for banning of non-IP addresses (Vasil Dimov)
94d335da7f8232bc653c9b08b0a33b517b4c98ad net: allow CSubNet of non-IP networks (Vasil Dimov)
Pull request description:
Allow creation of valid `CSubNet` objects of non-IP networks and only
match the single address they were created from (like /32 for IPv4 or
/128 for IPv6).
This fixes a deficiency in `CConnman::DisconnectNode(const CNetAddr& addr)`
and in `BanMan` which assume that creating a subnet from any address
using the `CSubNet(CNetAddr)` constructor would later match that address
only. Before this change a non-IP subnet would be invalid and would not
match any address.
ACKs for top commit:
jonatack:
Code review re-ACK 39b43298d9c54f9c18bef36f3d5934f57aefd088 per `git diff 5e95ce6 39b4329`; only change since last review is improvements to the functional test; verified the test fails on master @ 616eace0 where expected (`assert(self.is_banned(node, tor_addr))` fails and unban unfails)
laanwj:
code review ACK 39b43298d9c54f9c18bef36f3d5934f57aefd088
Tree-SHA512: 3239b26d0f2fa2d1388b4fdbc1d05ce4ac1980be699c6ec46049409baefcb2006b1e72b889871e2210e897f6725c48e873f68457eea7e6e4958ab4f959d20297
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Allow creation of valid `CSubNet` objects of non-IP networks and only
match the single address they were created from (like /32 for IPv4 or
/128 for IPv6).
This fixes a deficiency in `CConnman::DisconnectNode(const CNetAddr& addr)`
and in `BanMan` which assume that creating a subnet from any address
using the `CSubNet(CNetAddr)` constructor would later match that address
only. Before this change a non-IP subnet would be invalid and would not
match any address.
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Co-authored-by: Peter Yordanov <ppyordanov@yahoo.com>
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remove template (followup to #19845)
89836a82eec63f93bbe6c3bd6a52be26e71ab54d style: minor improvements as a followup to #19845 (Vasil Dimov)
Pull request description:
Address suggestions:
https://github.com/bitcoin/bitcoin/pull/19845#discussion_r495486760
https://github.com/bitcoin/bitcoin/pull/19845#discussion_r495488051
https://github.com/bitcoin/bitcoin/pull/19845#discussion_r495730125
ACKs for top commit:
jonatack:
re-ACK 89836a8 change since previous review is replacing std::runtime_error with std::exception, built/ran unit tests with gcc debian 10.2.0-15, then broke a few v3 net_tests involving `BOOST_CHECK_EXCEPTION`, rebuilt, ran `src/test/test_bitcoin -t net_tests -l all` and checked the error reporting.
hebasto:
re-ACK 89836a82eec63f93bbe6c3bd6a52be26e71ab54d
theStack:
ACK 89836a82eec63f93bbe6c3bd6a52be26e71ab54d
Tree-SHA512: 36477fdccabe5a8ad91fbabb4655cc363a3a7ca237a98ae6dd4a9fae4a4113762040f864d4ca13a47d081f7d16e5bd487edbfb61ab50a37e4a0424e9bec30b24
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Address suggestions:
https://github.com/bitcoin/bitcoin/pull/19845#discussion_r495486760
https://github.com/bitcoin/bitcoin/pull/19845#discussion_r495488051
https://github.com/bitcoin/bitcoin/pull/19845#discussion_r495730125
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886be97af5d4aba338b23a7b20b8560be8156231 Ignore incorrectly-serialized banlist.dat entries (Pieter Wuille)
883cea7dea3cedc9b45b6191f7d4e7be2d9a11ca Restore compatibility with old CSubNet serialization (Pieter Wuille)
Pull request description:
#19628 changed CSubNet for IPv4 netmasks, using the first 4 bytes of `netmask` rather than the last 4 to store the actual mask. Unfortunately, CSubNet objects are serialized on disk in banlist.dat, breaking compatibility with existing banlists (and bringing them into an inconsistent state where entries reported in `listbanned` cannot be removed).
Fix this by reverting to the old format (just for serialization). Also add a sanity check to the deserializer so that nonsensical banlist.dat entries are ignored (which would otherwise be possible if someone added IPv4 entries after #19628 but without this PR).
Reported by Greg Maxwell.
ACKs for top commit:
laanwj:
Code review ACK 886be97af5d4aba338b23a7b20b8560be8156231
vasild:
ACK 886be97af
Tree-SHA512: d3fb91e8ecd933406e527187974f22770374ee2e12a233e7870363f52ecda471fb0b7bae72420e8ff6b6b1594e3037a5115984c023dbadf38f86aeaffcd681e7
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3984b78cd7f49e409377f2175a56e8e4bd71d1d8 test: Add tests for CNode::ConnectedThroughNetwork (Hennadii Stepanov)
49fba9c1aa699d3aa47ea4dafe07b47c8d0aac6e net: Add CNode::ConnectedThroughNetwork member function (Hennadii Stepanov)
d4dde24034d7467883b290111da60527ab8048f8 net: Add CNode::m_inbound_onion data member (Hennadii Stepanov)
Pull request description:
This PR:
- adds `CNode::ConnectedThroughNetwork` member function
- is based on #19991, and only last two commits belong to it
- is required for https://github.com/bitcoin-core/gui/pull/86 and #20002
ACKs for top commit:
jonatack:
re-ACK 3984b78cd7f49e409377f2175a56e8e4bd71d1d8 per `git diff 3989fcf 3984b78c`
laanwj:
Code review ACK 3984b78cd7f49e409377f2175a56e8e4bd71d1d8
Tree-SHA512: 23a9c8bca8dca75113b5505fe443b294f2d42d03c98c7e34919da12d8396beb8d0ada3a58ae16e3da04b7044395f72cf9c216625afc078256cd6c897ac42bf3d
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dcf0cb477699d11afd0ff37c8bfb2b1b4f7f1ee5 tor: make a TORv3 hidden service instead of TORv2 (Vasil Dimov)
353a3fdaad055eea42a0baf7326bdd591f541170 net: advertise support for ADDRv2 via new message (Vasil Dimov)
201a4596d92d640d5eb7e76cc8d959228fa09dbb net: CAddress & CAddrMan: (un)serialize as ADDRv2 (Vasil Dimov)
1d3ec2a1fda7446323786a52da1fd109c01aa6fb Support bypassing range check in ReadCompactSize (Pieter Wuille)
Pull request description:
This PR contains the two remaining commits from #19031 to complete the [BIP155](https://github.com/bitcoin/bips/blob/master/bip-0155.mediawiki) implementation:
`net: CAddress & CAddrMan: (un)serialize as ADDRv2`
`net: advertise support for ADDRv2 via new message`
plus one more commit:
`tor: make a TORv3 hidden service instead of TORv2`
ACKs for top commit:
jonatack:
re-ACK dcf0cb477699d11afd0ff37c8bfb2b1b4f7f1ee5 per `git diff 9b56a68 dcf0cb4` only change since last review is an update to the release notes which partially picked up the suggested text. Running a node on this branch and addnode-ing to 6 other Tor v3 nodes, I see "addrv2" and "sendaddrv2" messages in getpeerinfo in both the "bytesrecv_per_msg" and "bytessent_per_msg" JSON objects.
sipa:
ACK dcf0cb477699d11afd0ff37c8bfb2b1b4f7f1ee5
hebasto:
re-ACK dcf0cb477699d11afd0ff37c8bfb2b1b4f7f1ee5, the node works flawlessly in all of the modes: Tor-only, clearnet-only, mixed.
laanwj:
Edit: I have to retract this ACK for now, I'm having some problems with this PR on a FreeBSD node. It drops all outgoing connections with this dcf0cb477699d11afd0ff37c8bfb2b1b4f7f1ee5 merged on master (12a1c3ad1a43634d2a98717e49e3f02c4acea2fe).
ariard:
Code Review ACK dcf0cb4
Tree-SHA512: 28d4d0d817b8664d2f4b18c0e0f31579b2f0f2d23310ed213f1f436a4242afea14dfbf99e07e15889bc5c5c71ad50056797e9307ff8a90e96704f588a6171308
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Introduce a new message `sendaddrv2` to signal support for ADDRv2.
Send the new message immediately after sending the `VERACK` message.
Add support for receiving and parsing ADDRv2 messages.
Send ADDRv2 messages (instead of ADDR) to a peer if he has
advertised support for it.
Co-authored-by: Carl Dong <contact@carldong.me>
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Recognizing addresses from those networks allows us to accept and gossip
them, even though we don't know how to connect to them (yet).
Co-authored-by: eriknylund <erik@daychanged.com>
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Co-authored-by: Carl Dong <contact@carldong.me>
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Before this change `CNetAddr::ip` was a fixed-size array of 16 bytes,
not being able to store larger addresses (e.g. TORv3) and encoded
smaller ones as 16-byte IPv6 addresses.
Change its type to `prevector`, so that it can hold larger addresses and
do not disguise non-IPv6 addresses as IPv6. So the IPv4 address
`1.2.3.4` is now encoded as `01020304` instead of
`00000000000000000000FFFF01020304`.
Rename `CNetAddr::ip` to `CNetAddr::m_addr` because it is not an "IP" or
"IP address" (TOR addresses are not IP addresses).
In order to preserve backward compatibility with serialization (where
e.g. `1.2.3.4` is serialized as `00000000000000000000FFFF01020304`)
introduce `CNetAddr` dedicated legacy serialize/unserialize methods.
Adjust `CSubNet` accordingly. Still use `CSubNet::netmask[]` of fixed 16
bytes, but use the first 4 for IPv4 (not the last 4). Only allow
subnetting for IPv4 and IPv6.
Co-authored-by: Carl Dong <contact@carldong.me>
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Before this change, we would analyze the contents of `CNetAddr::ip[16]`
in order to tell which type is an address. Change this by introducing a
new member `CNetAddr::m_net` that explicitly tells the type of the
address.
This is necessary because in BIP155 we will not be able to tell the
address type by just looking at its raw representation (e.g. both TORv3
and I2P are "seemingly random" 32 bytes).
As a side effect of this change we no longer need to store IPv4
addresses encoded as IPv6 addresses - we can store them in proper 4
bytes (will be done in a separate commit). Also the code gets
somewhat simplified - instead of
`memcmp(ip, pchIPv4, sizeof(pchIPv4)) == 0` we can use
`m_net == NET_IPV4`.
Co-authored-by: Carl Dong <contact@carldong.me>
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Do not access `CNetAddr::ip` directly from `CService` methods.
This improvement will help later when we change the type of
`CNetAddr::ip` (in the BIP155 implementation).
Co-authored-by: Carl Dong <contact@carldong.me>
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1cabbddbca615b26aa4510c75f459c28d6fe0afd refactor: Use uint16_t instead of unsigned short (Aaron Hook)
Pull request description:
I wanted to see if the `up for grabs` label works and looked at PR #17822 originally opend by ahook I saw it had many acks for example by jonatack and practicalswift but needed rebasing.
So I checked out the remote branch rebased it resolved three conflicts and continued the rebase.
Hope everything is as expected (:
ACKs for top commit:
sipsorcery:
ACK 1cabbddbca615b26aa4510c75f459c28d6fe0afd.
practicalswift:
ACK 1cabbddbca615b26aa4510c75f459c28d6fe0afd -- patch looks correct :)
laanwj:
ACK 1cabbddbca615b26aa4510c75f459c28d6fe0afd
hebasto:
ACK 1cabbddbca615b26aa4510c75f459c28d6fe0afd, I have reviewed the code and it looks OK, I agree it can be merged.
Tree-SHA512: 0e6bf64f274aae5dacb188358b4d5f65ccb207d4f70922f039bc4ed7934709418ddad19f8bfb7462517427837c3d2bb3f86ef284bb40e87119aad2a1e148d9d6
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This patch improves performance and resource usage around IP
addresses that are banned for misbehavior. They're already not
actually banned, as connections from them are still allowed,
but they are preferred for eviction if the inbound connection
slots are full.
Stop treating these like manually banned IP ranges, and instead
just keep them in a rolling Bloom filter of misbehaving nodes,
which isn't persisted to disk or exposed through the ban
framework. The effect remains the same: preferred for eviction,
avoided for outgoing connections, and not relayed to other peers.
Also change the name of this mechanism to better reflect reality;
they're not banned, just discouraged.
Contains release notes and several interface improvements by
John Newbery.
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removed trailing whitespace to make linter happy
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f9ee0f37c28f604bc82dab502ce229c66ef5b3b9 Add comments to CustomUintFormatter (Pieter Wuille)
4eb5643e3538863c9d2ff261f49a9a1b248de243 Convert everything except wallet/qt to new serialization (Pieter Wuille)
2b1f85e8c52c8bc5a17eae4c809eaf61d724af98 Convert blockencodings_tests to new serialization (Pieter Wuille)
73747afbbeb013669faf4c4d2c0903cec4526fb0 Convert merkleblock to new serialization (Pieter Wuille)
d06fedd1bc26bf5bf2b203d4445aeaebccca780e Add SER_READ and SER_WRITE for read/write-dependent statements (Russell Yanofsky)
6f9a1e5ad0a270d3b5a715f3e3ea0911193bf244 Extend CustomUintFormatter to support enums (Russell Yanofsky)
769ee5fa0011ae658770586442715452a656559d Merge BigEndian functionality into CustomUintFormatter (Pieter Wuille)
Pull request description:
The next step of changes from #10785.
This:
* Adds support for enum serialization to `CustomUintFormatter`, used in `CAddress` for service flags.
* Merges `BigEndian` into `CustomUintFormatter`, used in `CNetAddr` for port numbers.
* Converts everything (except wallet and gui) to use the new serialization framework.
ACKs for top commit:
MarcoFalke:
re-ACK f9ee0f37c2, only change is new documentation commit for CustomUintFormatter š
ryanofsky:
Code review ACK f9ee0f37c28f604bc82dab502ce229c66ef5b3b9. Just new commit adding comment since last review
jonatack:
Code review re-ACK f9ee0f37c28f604bc82dab502ce229c6 only change since last review is an additional commit adding Doxygen documentation for `CustomUintFormatter`.
Tree-SHA512: e7a0a36afae592d5a4ff8c81ae04d858ac409388e361f2bc197d9a78abca45134218497ab2dfd6d031e0cce0ca586cf857077b7c6ce17fccf67e2d367c1b6cd4
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748977690e0519110cda9628162a7ccf73a5934b Add asmap_direct fuzzer that tests Interpreter directly (Pieter Wuille)
7cf97fda154ba837933eb05be5aeecfb69a06641 Make asmap Interpreter errors fatal and fuzz test it (Pieter Wuille)
c81aefc5377888c7ac4f29f570249fd6c2fdb352 Add additional effiency checks to sanity checker (Pieter Wuille)
fffd8dca2de39ad4a683f0dce57cdca55ed2f600 Add asmap sanity checker (Pieter Wuille)
5feefbe6e7b6cdd809eba4074d41dc95a7035f7e Improve asmap Interpret checks and document failures (Pieter Wuille)
2b3dbfa5a63cb5a6625ec00294ebd933800f0255 Deal with decoding failures explicitly in asmap Interpret (Pieter Wuille)
1479007a335ab43af46f527d0543e254fc2a8e86 Introduce Instruction enum in asmap (Pieter Wuille)
Pull request description:
This improves/documents the failure cases inside the asmap interpreter. None of the changes are bug fixes (they only change behavior for corrupted asmap files), but they may make things easier to follow.
In a second step, a sanity checker is added that effectively executes every potential code path through the asmap file, checking the same failure cases as the interpreter, and more. It takes around 30 ms to run for me for a 1.2 MB asmap file.
I've verified that this accepts asmap files constructed by https://github.com/sipa/asmap/blob/master/buildmap.py with a large dataset, and no longer accepts it with 1 bit changed in it.
ACKs for top commit:
practicalswift:
ACK 748977690e0519110cda9628162a7ccf73a5934b modulo feedback below.
jonatack:
ACK 748977690e0519110cda9628162a7ccf73a5934b code review, regular build/tests/ran bitcoin with -asmap, fuzz build/ran both fuzzers overnight.
fjahr:
ACK 748977690e0519110cda9628162a7ccf73a5934b
Tree-SHA512: d876df3859735795c857c83e7155ba6851ce839bdfa10c18ce2698022cc493ce024b5578c1828e2a94bcdf2552c2f46c392a251ed086691b41959e62a6970821
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-BEGIN VERIFY SCRIPT-
./contrib/devtools/copyright_header.py update ./
-END VERIFY SCRIPT-
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and remove redundant public declaration
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c86bc144081f960347232546f7d22deb65d27deb Make asmap Interpret tolerant of malicious map data (Pieter Wuille)
38c2395d7a905c87dc4630031849fd8e403e61bf Use ASNs for mapped IPv4 addresses correctly (Pieter Wuille)
6f8c93731203c111f86c39eaf2102f9a825d1706 Mark asmap const in statistics code (Pieter Wuille)
d58bcdc4b569a667b6974c3547b7ff6f665afce9 Avoid asmap copies in initialization (Pieter Wuille)
Pull request description:
Here are a few things to improve in the asmap implementation. The first two commits are just code improvements. The last one is a bugfix (the exsting code wouldn't correctly apply ASN lookups to mapped/embedded IPv4 addresses).
ACKs for top commit:
practicalswift:
ACK c86bc144081f960347232546f7d22deb65d27deb -- patch looks correct
naumenkogs:
utACK c86bc14
laanwj:
ACK c86bc144081f960347232546f7d22deb65d27deb
jonatack:
ACK c86bc144081f960347232546f7d22deb65d27deb code looks correct, built/ran tests, bitcoind with -asmap pointed to asmap/demo.map
Tree-SHA512: 1036f43152754d621bfbecfd3b7c7276e4670598fcaed42a3d275e51fa2cf3653e2c9e9cfa714f6c7719362541510e92171e076ac4169b55a0cc8908b2d514c0
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3c1bc40205a3fcab606e70b0e3c13d68b2860e34 Add extra logging of asmap use and bucketing (Gleb Naumenko)
e4658aa8eaf1629dd5af8cf7b9717a8e72028251 Return mapped AS in RPC call getpeerinfo (Gleb Naumenko)
ec45646de9e62b3d42c85716bfeb06d8f2b507dc Integrate ASN bucketing in Addrman and add tests (Gleb Naumenko)
8feb4e4b667361bf23344149c01594abebd56fdb Add asmap utility which queries a mapping (Gleb Naumenko)
Pull request description:
This PR attempts to solve the problem explained in #16599.
A particular attack which encouraged us to work on this issue is explained here [[Erebus Attack against Bitcoin Peer-to-Peer Network](https://erebus-attack.comp.nus.edu.sg/)] (by @muoitranduc)
Instead of relying on /16 prefix to diversify the connections every node creates, we would instead rely on the (ip -> ASN) mapping, if this mapping is provided.
A .map file can be created by every user independently based on a router dump, or provided along with the Bitcoin release. Currently we use the python scripts written by @sipa to create a .map file, which is no larger than 2MB (awesome!).
Here I suggest adding a field to peers.dat which would represent a hash of asmap file used while serializing addrman (or 0 for /16 prefix legacy approach).
In this case, every time the file is updated (or grouping method changed), all buckets will be re-computed.
I believe that alternative selective re-bucketing for only updated ranges would require substantial changes.
TODO:
- ~~more unit tests~~
- ~~find a way to test the code without including >1 MB mapping file in the repo.~~
- find a way to check that mapping file is not corrupted (checksum?)
- comments and separate tests for asmap.cpp
- make python code for .map generation public
- figure out asmap distribution (?)
~Interesting corner case: Iām using std::hash to compute a fingerprint of asmap, and std::hash returns size_t. I guess if a user updates the OS to 64-bit, then the hash of asap will change? Does it even matter?~
ACKs for top commit:
laanwj:
re-ACK 3c1bc40205a3fcab606e70b0e3c13d68b2860e34
jamesob:
ACK 3c1bc40205a3fcab606e70b0e3c13d68b2860e34 ([`jamesob/ackr/16702.3.naumenkogs.p2p_supplying_and_using`](https://github.com/jamesob/bitcoin/tree/ackr/16702.3.naumenkogs.p2p_supplying_and_using))
jonatack:
ACK 3c1bc40205a3fcab606e70b0e3c13d68b2860e34
Tree-SHA512: e2dc6171188d5cdc2ab2c022fa49ed73a14a0acb8ae4c5ffa970172a0365942a249ad3d57e5fb134bc156a3492662c983f74bd21e78d316629dcadf71576800c
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If ASN bucketing is used, return a corresponding AS
used in bucketing for a given peer.
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-BEGIN VERIFY SCRIPT-
./contrib/devtools/copyright_header.py update ./
-END VERIFY SCRIPT-
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Instead of using /16 netgroups to bucket nodes in Addrman for connection
diversification, ASN, which better represents an actor in terms
of network-layer infrastructure, is used.
For testing, asmap.raw is used. It represents a minimal
asmap needed for testing purposes.
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The original ORCHID prefix was deprecated as of 2014-03, the new
ORCHIDv2 prefix was allocated by RFC7343 as of 2014-07. We did not
consider the original ORCHID prefix routable, and I don't see any reason
to consider the new one to be either.
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- Improve IsRFC methods docs
- Improve {Is,Set}Internal docs
- Add tor methods docs
- Add IsIPv{4,6} docs
- Add IsValid docs
- Add IsRoutable docs
- Improve GetGroup docs
- Add CService::GetSockAddr docs
- Add CService::GetKey docs
- Add CSubNet::Match docs
- Add NetmaskBits docs
- Add CNetAddr default constructor docs
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b7b36decaf878a8c1dcfdb4a27196c730043474b fix uninitialized read when stringifying an addrLocal (Kaz Wesley)
8ebbef016928811756e46b9086067d1c826797a8 add test demonstrating addrLocal UB (Kaz Wesley)
Pull request description:
Reachable from either place where SetIP is used when all of:
- our best-guess addrLocal for a peer is IPv4
- the peer tells us it's reaching us at an IPv6 address
- NET logging is enabled
In that case, SetIP turns an IPv4 address into an IPv6 address without
setting the scopeId, which is subsequently read in GetSockAddr during
CNetAddr::ToStringIP and passed to getnameinfo. Fix by ensuring every
constructor initializes the scopeId field with something.
Tree-SHA512: 8f0159750995e08b985335ccf60a273ebd09003990bcf2c3838b550ed8dc2659552ac7611650e6dd8e29d786fe52ed57674f5880f2e18dc594a7a863134739e3
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Reachable from either place where SetIP is used when our best-guess
addrLocal for a peer is IPv4, but the peer tells us it's reaching us at
an IPv6 address.
In that case, SetIP turns an IPv4 address into an IPv6 address without
setting the scopeId, which is subsequently read in GetSockAddr during
CNetAddr::ToStringIP and passed to getnameinfo. Fix by ensuring every
constructor initializes the scopeId field with something.
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