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Wladimir J. van der Laan 416efcb7ab
Merge #19728: Increase the ip address relay branching factor for unreachable networks 
86d4cf42d9 Increase the ip address relay branching factor for unreachable networks (Pieter Wuille)

Pull request description:

  Onion addresses propagate very badly among the IPv4/IPv6 network, resulting
  in difficulty for those to find each other.

  The branching factor 1 is probably so low that propagations die out before
  they reach another onion peer. Increase it to 1.5 on average.

ACKs for top commit:
  practicalswift:
    ACK 86d4cf42d9 -- patch looks correct
  naumenkogs:
    ACK 86d4cf4
  jonatack:
    ACK 86d4cf42d9. Code review, built and running with some sanity check logging. `RelayAddress()` is called by `ProcessMessage() ADDR` msg handling, from within the loop while processing each new address to relay it to a limited number of other nodes. According to git blame, the line setting `nRelayNodes` hasn't been touched since 2016 in e736772c56 *Move network-msg-processing code out of main to its own file*, which moved the line but otherwise did not change it. Running a mixed clearnet/onion node with this patch and the logging below, I'm only seeing values of `fReachable 1, nRelayNodes 2`. IIUC, I need to use the settings in `init.cpp` that call `SetReachable(*, false)`. *Edit:* with `onlynet=onion` am now seeing entries of `fReachable 0` with `nRelayNodes` values of 1 and 2.
  vasild:
    ACK 86d4cf42d

Tree-SHA512: 22391e16d60bcfdec9a9336728da39d68a24a183b3d1b0e8fbc038d265ca6ddf71d16db018f3678745fd9f3e9281049e42197fa0a29124833c50a9170ed6f793
2020-09-05 14:08:16 +02:00
.github doc: Remove label from good first issue template 2020-08-24 09:31:24 +02:00
.tx tx: Bump transifex slug to 020x 2020-03-16 10:52:55 +01:00
build-aux/m4 Merge #17396: build: modest Android improvements 2020-08-24 21:27:29 +08:00
build_msvc Move Win32 defines to configure.ac to ensure they are globally defined 2020-08-20 17:55:06 +00:00
ci util: Hard code previous release tarball checksums 2020-08-29 11:28:53 +03:00
contrib scripted-diff: Move previous_release.py to test/get_previous_releases.py 2020-08-29 11:26:25 +03:00
depends Merge #19685: depends: CMake invocation cleanup 2020-09-02 21:03:05 +08:00
doc Merge #19405: rpc, cli: add network in/out connections to getnetworkinfo and -getinfo 2020-09-04 15:09:37 +02:00
share doc: Use precise permission flags where possible 2020-07-10 15:37:42 +02:00
src Merge #19728: Increase the ip address relay branching factor for unreachable networks 2020-09-05 14:08:16 +02:00
test Merge #19405: rpc, cli: add network in/out connections to getnetworkinfo and -getinfo 2020-09-04 15:09:37 +02:00
.appveyor.yml Update the vcpkg checkout commit ID in appveyor config. 2020-08-31 08:10:02 +01:00
.cirrus.yml ci: Set cirrus RAM to 8GB 2020-08-17 11:53:31 +02:00
.fuzzbuzz.yml ci: Add fuzzbuzz integration 2020-04-14 16:38:26 +00:00
.gitattributes Separate protocol versioning from clientversion 2014-10-29 00:24:40 -04:00
.gitignore build: Add missed fuzz.coverage/ directory to .gitignore 2020-08-08 23:52:18 +03:00
.python-version .python-version: Specify full version 3.5.6 2019-03-02 12:06:26 -05:00
.style.yapf test: .style.yapf: Set column_limit=160 2019-03-04 18:28:13 -05:00
.travis.yml ci: Run valgrind fuzzer on cirrus 2020-08-17 11:52:02 +02:00
autogen.sh scripted-diff: Bump copyright of files changed in 2019 2019-12-30 10:42:20 +13:00
configure.ac Merge #19803: Bugfix: Define and use HAVE_FDATASYNC correctly outside LevelDB 2020-08-31 13:07:24 +08:00
CONTRIBUTING.md Replace hidden service with onion service 2020-08-07 14:55:02 +02:00
COPYING doc: Update license year range to 2020 2019-12-26 23:11:21 +01:00
INSTALL.md Update INSTALL landing redirection notice for build instructions. 2016-10-06 12:27:23 +13:00
libbitcoinconsensus.pc.in build: remove libcrypto as internal dependency in libbitcoinconsensus.pc 2019-11-19 15:03:44 +01:00
Makefile.am build: add /usr/local/ to LCOV_FILTER_PATTERN for macOS builds 2020-09-02 15:17:13 -04:00
README.md doc: Mention repo split in the READMEs 2020-06-08 10:06:14 -04:00
SECURITY.md doc: Remove explicit mention of version from SECURITY.md 2019-06-14 06:39:17 -04:00

README.md

Bitcoin Core integration/staging tree

https://bitcoincore.org

What is Bitcoin?

Bitcoin is an experimental digital currency that enables instant payments to anyone, anywhere in the world. Bitcoin uses peer-to-peer technology to operate with no central authority: managing transactions and issuing money are carried out collectively by the network. Bitcoin Core is the name of open source software which enables the use of this currency.

For more information, as well as an immediately usable, binary version of the Bitcoin Core software, see https://bitcoincore.org/en/download/, or read the original whitepaper.

License

Bitcoin Core is released under the terms of the MIT license. See COPYING for more information or see https://opensource.org/licenses/MIT.

Development Process

The master branch is regularly built (see doc/build-*.md for instructions) and tested, but it is not guaranteed to be completely stable. Tags are created regularly from release branches to indicate new official, stable release versions of Bitcoin Core.

The https://github.com/bitcoin-core/gui repository is used exclusively for the development of the GUI. Its master branch is identical in all monotree repositories. Release branches and tags do not exist, so please do not fork that repository unless it is for development reasons.

The contribution workflow is described in CONTRIBUTING.md and useful hints for developers can be found in doc/developer-notes.md.

Testing

Testing and code review is the bottleneck for development; we get more pull requests than we can review and test on short notice. Please be patient and help out by testing other people's pull requests, and remember this is a security-critical project where any mistake might cost people lots of money.

Automated Testing

Developers are strongly encouraged to write unit tests for new code, and to submit new unit tests for old code. Unit tests can be compiled and run (assuming they weren't disabled in configure) with: make check. Further details on running and extending unit tests can be found in /src/test/README.md.

There are also regression and integration tests, written in Python, that are run automatically on the build server. These tests can be run (if the test dependencies are installed) with: test/functional/test_runner.py

The Travis CI system makes sure that every pull request is built for Windows, Linux, and macOS, and that unit/sanity tests are run automatically.

Manual Quality Assurance (QA) Testing

Changes should be tested by somebody other than the developer who wrote the code. This is especially important for large or high-risk changes. It is useful to add a test plan to the pull request description if testing the changes is not straightforward.

Translations

Changes to translations as well as new translations can be submitted to Bitcoin Core's Transifex page.

Translations are periodically pulled from Transifex and merged into the git repository. See the translation process for details on how this works.

Important: We do not accept translation changes as GitHub pull requests because the next pull from Transifex would automatically overwrite them again.

Translators should also subscribe to the mailing list.