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c276df775914e4e42993c76e172ef159e3b830d4 zmq: enable tcp keepalive (mruddy) Pull request description: This addresses https://github.com/bitcoin/bitcoin/issues/12754. These changes enable node operators to address the silent dropping (by network middle boxes) of long-lived low-activity ZMQ TCP connections via further operating system level TCP keepalive configuration. For example, ZMQ sockets that publish block hashes can be affected in this way due to the length of time it sometimes takes between finding blocks (e.g.- sometimes more than an hour). Prior to this patch, operating system level TCP keepalive configurations would not take effect since the SO_KEEPALIVE option was not enabled on the underlying socket. There are additional ZMQ socket options related to TCP keepalive that can be set. However, I decided not to implement those options in this changeset because doing so would require adding additional bitcoin node configuration options, and would not yield a better outcome. I preferred a small, easily reviewable patch that doesn't add a bunch of new config options, with the tradeoff that the fine tuning would have to be done via well-documented operating system specific configurations. I tested this patch by running a node with: `./src/qt/bitcoin-qt -regtest -txindex -datadir=/tmp/node -zmqpubhashblock=tcp://127.0.0.1:28332 &` and connecting to it with: `python3 ./contrib/zmq/zmq_sub.py` Without these changes, `ss -panto | grep 28332 | grep ESTAB | grep bitcoin` will report no keepalive timer information. With these changes, the output from the prior command will show keepalive timer information consistent with the configuration at the time of connection establishment, e.g.-: `timer:(keepalive,119min,0)`. I also tested with a non-TCP transport and did not witness any adverse effects: `./src/qt/bitcoin-qt -regtest -txindex -datadir=/tmp/node -zmqpubhashblock=ipc:///tmp/bitcoin.block &` ACKs for top commit: adamjonas: Just to summarize for those looking to review - as of c276df775914e4e42993c76e172ef159e3b830d4 there are 3 tACKs (n-thumann, Haaroon, and dlogemann), 1 "looks good to me" (laanwj) with no NACKs or any show-stopping concerns raised. jonasschnelli: utACK c276df775914e4e42993c76e172ef159e3b830d4 Tree-SHA512: b884c2c9814e97e666546a7188c48f9de9541499a11a934bd48dd16169a900c900fa519feb3b1cb7e9915fc7539aac2829c7806b5937b4e1409b4805f3ef6cd1 |
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| man | ||
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| assets-attribution.md | ||
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| bips.md | ||
| bitcoin_logo_doxygen.png | ||
| build-cross.md | ||
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| dash-conf.md | ||
| developer-notes.md | ||
| dnsseed-policy.md | ||
| Doxyfile.in | ||
| files.md | ||
| fuzzing.md | ||
| gitian-building.md | ||
| init.md | ||
| instantsend.md | ||
| JSON-RPC-interface.md | ||
| keepass.md | ||
| masternode-budget.md | ||
| productivity.md | ||
| psbt.md | ||
| README_windows.txt | ||
| README.md | ||
| reduce-memory.md | ||
| reduce-traffic.md | ||
| release-notes-13152.md | ||
| release-notes-14941.md | ||
| release-notes-14954.md | ||
| release-notes-17410.md | ||
| release-notes.md | ||
| release-process.md | ||
| REST-interface.md | ||
| shared-libraries.md | ||
| tor.md | ||
| translation_process.md | ||
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Dash Core
This is the official reference wallet for Dash digital currency and comprises the backbone of the Dash peer-to-peer network. You can download Dash Core or build it yourself using the guides below.
Running
The following are some helpful notes on how to run Dash Core on your native platform.
Unix
Unpack the files into a directory and run:
bin/dash-qt(GUI) orbin/dashd(headless)
Windows
Unpack the files into a directory, and then run dash-qt.exe.
macOS
Drag Dash Core to your applications folder, and then run Dash Core.
Need Help?
- See the Dash documentation for help and more information.
- Ask for help on Dash Discord
- Ask for help on the Dash Forum
Building
The following are developer notes on how to build Dash Core on your native platform. They are not complete guides, but include notes on the necessary libraries, compile flags, etc.
- macOS Build Notes
- Unix Build Notes
- Windows Build Notes
- OpenBSD Build Notes
- NetBSD Build Notes
- Gitian Building Guide
Development
The Dash Core repo's root README contains relevant information on the development process and automated testing.
- Developer Notes
- Productivity Notes
- Release Notes
- Release Process
- Source Code Documentation TODO
- Translation Process
- Translation Strings Policy
- Travis CI
- JSON-RPC Interface
- Unauthenticated REST Interface
- Shared Libraries
- BIPS
- Dnsseed Policy
- Benchmarking
Resources
- See the Dash Developer Documentation for technical specifications and implementation details.
- Discuss on the Dash Forum, in the Development & Technical Discussion board.
- Discuss on Dash Discord
- Discuss on Dash Developers Discord
Miscellaneous
- Assets Attribution
- dash.conf Configuration File
- Files
- Fuzz-testing
- Reduce Memory
- Reduce Traffic
- Tor Support
- Init Scripts (systemd/upstart/openrc)
- ZMQ
- PSBT support
License
Distributed under the MIT software license. This product includes software developed by the OpenSSL Project for use in the OpenSSL Toolkit. This product includes cryptographic software written by Eric Young (eay@cryptsoft.com), and UPnP software written by Thomas Bernard.