ee1128ead8 doc: update stack-clash-protection comment re mingw-w64 (fanquake)
bf47448f15 test: drop check for Windows < 10 (fanquake)
35b898c47f release: target Windows 10 or later (fanquake)
398754e70b depends: target Windows 10 when building for mingw-w64 (fanquake)
Pull request description:
Follows up to https://github.com/bitcoin/bitcoin/pull/31048#discussion_r1803165670.
We definitely cannot claim that Bitcoin Core is "supported and extensively tested on" on Windows 7.
Note that #30997 is also increasing the minimum required Windows version (for the GUI) to 10.
ACKs for top commit:
hodlinator:
cr-ACK ee1128ead8
davidgumberg:
ACK ee1128ead8
achow101:
ACK ee1128ead8
hebasto:
re-ACK ee1128ead8, only rebased, a commit message and a comment have been amended since my recent [review](https://github.com/bitcoin/bitcoin/pull/31172#pullrequestreview-2415452160).
TheCharlatan:
ACK ee1128ead8
Tree-SHA512: 245e0bac3d63414d919a1948661fef4ff79359faaacaf19d64abd91cc62e822797fb1cf3379e340bfdf9a85c0b88fd99a90eda450dd4218b6213ab78aefb1374
915640e191 depends: zeromq: don't install .pc files and remove patches for them (Cory Fields)
6b8a74463b cmake: Add `FindZeroMQ` module (Hennadii Stepanov)
Pull request description:
This PR introduces the `FindZeroMQ` module, which first attempts to find the `libzmq` library using CMake's `find_package()` and falls back to `pkg_check_modules()` if unsuccessful.
Addresses https://github.com/bitcoin/bitcoin/issues/30876 for the ZeroMQ package.
ACKs for top commit:
fanquake:
ACK 915640e191
Tree-SHA512: 2f17bae21be5d3f280a13425d22f5d1b2e23837a8aaf5ec89c433767509de030a42d598b261e102bdb5b860d8ede98013c124c3d25e081e956d4ee3a81b2584f
40e5f26a3f mapport: remove dead code in DispatchMapPort (Antoine Poinsot)
38fdf7c1fb mapport: drop outdated comments (Antoine Poinsot)
b7b2435290 doc: add release note for #31130 (Antoine Poinsot)
1b6dec98da depends: drop miniupnpc (Antoine Poinsot)
953533d021 doc: remove mentions of UPnP (Antoine Poinsot)
94ad614482 ci: remove UPnP options (Antoine Poinsot)
a9598e5eaa build: drop miniupnpc dependency (Antoine Poinsot)
a5fcfb7385 interfaces: remove now unused 'use_upnp' arg from 'mapPort' (Antoine Poinsot)
038bbe7b20 daemon: remove UPnP support (Antoine Poinsot)
844770b05e qt: remove UPnP settings (Antoine Poinsot)
Pull request description:
This PR removes UPnP IGD support and drops our [miniupnp](https://github.com/miniupnp/miniupnp) dependency.
Miniupnpc is a C library (somewhat) maintained by a single person which had several vulnerabilities in the past (a couple dozens are listed [here](https://cve.mitre.org/cgi-bin/cvekey.cgi?keyword=miniupnp)), some of which directly affected our software ([RCE in 2015](https://bitcoincore.org/en/2024/07/03/disclose_upnp_rce/), [OOM in 2020](https://bitcoincore.org/en/2024/07/31/disclose-upnp-oom/)).
The main purpose of this functionality is to have more (non-data-center) reachable nodes on the network. For a non-technical user running Bitcoin Core at home, the software would automatically open a port on their router to receive incoming connections. This way, users not able to manually open a port on their router would still provide the network with more resources and enhance its diversity.
However, due to past vulnerabilities (and a worry about unknown future ones) in miniupnpc this feature was disabled by default in https://github.com/bitcoin/bitcoin/pull/6795. Having it disabled by default kills (most of?) the purpose of having this functionality in the first place: someone technical enough to understand the `-upnp` startup option or the "enable UPnP" setting is most likely able to open a port on his box in the first place.
In addition, laanwj implemented PCP with a NAT-PMP fallback directly in Bitcoin Core in https://github.com/bitcoin/bitcoin/pull/30043. If we ever want to re-enable automatic NAT traversal by default in Bitcoin Core, this is the best option (and in my opinion the only sane one). The NAT-PMP fallback makes it so compatibility shouldn't be (much of) an issue.
On balance, i believe that keeping this functionality and this barely maintained C dependency has higher costs than benefits. Therefore i propose that we get rid of it.
ACKs for top commit:
jarolrod:
ACK 40e5f26a3f
1440000bytes:
Code Review ACK 40e5f26a3f
laanwj:
Code review ACK 40e5f26a3f
i-am-yuvi:
Tested ACK 40e5f26a3f
Tree-SHA512: 9ea48662775510f5ec6de7af65790f7c8d211603398e9d8c634a86387be81b28081419a95b4d6680d3d7fe6a9f16cec99f16516548201dc7e49781909899a657
5c7cacf649 ci: Remove natpmp build option and libnatpmp dependency (laanwj)
7e7ec984da doc: Remove mention of natpmp build options (laanwj)
061c3e32a2 depends: Drop natpmp and associated option from depends (laanwj)
20a18bf6aa build: Drop libnatpmp from build system (laanwj)
7b04709862 qt: Changes for built-in PCP+NAT-PMP (laanwj)
52f8ef66c6 net: Replace libnatpmp with built-in NATPMP+PCP implementation in mapport (laanwj)
97c97177cd net: Add PCP and NATPMP implementation (laanwj)
d72df63d16 net: Use GetLocalAddresses in Discover (laanwj)
e02030432b net: Add netif utility (laanwj)
754e425438 crypto: Add missing WriteBE16 function (laanwj)
Pull request description:
Continues #30005. Closes #17012..
This PR adds PCP (Port Control Protocol) from [RFC6887](https://datatracker.ietf.org/doc/html/rfc6887). This adds, in addition to the existing IPv4 port mapping (which now uses PCP, with fallback to NAT-PMP), support for IPv6 pinholing-that is, opening a port on the firewall to make it reachable.
PCP, like NAT-PMP is a simple UDP-based protocol, and the implementation is self-contained, so this gets rid of lthe libnatpnp dependency without adding a new one. It should otherwise be a drop-in replacement. NAT-PMP fallback is implemented so this will not make router support worse.
For now it is disabled by default, though in the future (not in this PR) we could consider enable it by default to increase the number of connectable nodes without adding significant attack surface.
To test:
```bash
bitcoind -regtest -natpmp=1 -debug=net
```
(most of the changes in this PR are, ironically, removing the libnatpmp dependency and associated build system and build docs)
## TODO
- [x] Default gateway discovery on Linux / FreeBSD
- [x] Default gateway discovery on Windows
- [x] Default gateway discovery on MacOS
- [x] Either solve FreeBSD compile issue (probably upstream issue) or remove FreeBSD support
## Things to consider for follow-up PRs
- https://github.com/bitcoin/bitcoin/pull/30043#discussion_r1658764974 avoid unreachable nets (not given to -onlynet=)
- https://github.com/bitcoin/bitcoin/pull/30043#discussion_r1658949236 could announce an addr:port where we do not listen (no -bind)
- https://github.com/bitcoin/bitcoin/pull/30043#discussion_r1684368824 could announce the wrong port because it uses GetListenPort()
- https://github.com/bitcoin/bitcoin/pull/30043#discussion_r1679709347 if we requested one port but another was assigned, then which one to use in the renewal?
- https://github.com/bitcoin/bitcoin/pull/30043#discussion_r1772017020 Use `GetAdapterAddresses` to discover local addresses for Windows
ACKs for top commit:
Sjors:
ACK 5c7cacf649
achow101:
ACK 5c7cacf649
vasild:
ACK 5c7cacf649
Tree-SHA512: e35b69e56d5f5449a3d48a799f9b7b65107c65eeb3e245c2c1e9d42221e469ca5ead90afae423160601cd664dd553a51c859e04f4492f335b064aae3bf23e3bc
Currently, builds of libevent in depends, using CMake, fail on some
systems, like Alpine, with the following:
```bash
/bitcoin/depends/work/build/aarch64-unknown-linux-musl/libevent/2.1.12-stable-1516ed47ea8/evmap.c: In function 'evmap_signal_add_':
/bitcoin/depends/work/build/aarch64-unknown-linux-musl/libevent/2.1.12-stable-1516ed47ea8/evmap.c:456:31: error: 'NSIG' undeclared (first use in this function)
456 | if (sig < 0 || sig >= NSIG)
```
From what I can tell the `_GNU_SOURCE` "detection" in libevents CMake build
system, never? really worked, and it's not clear what a nice fix is.
For now, always use `_GNU_SOURCE` when building libevent in depends.
8c935e625e depends: Fix CMake-generated `libevent*.pc` files (Hennadii Stepanov)
Pull request description:
Broken out of #30454. This is a backport of the merged upstream PR: https://github.com/libevent/libevent/pull/1622.
Note that after #29835 we might end up dropping pkg-config and using the installed CMake files directly, but that depends on whether or not enough distros actually ship those files.
Either way, having fixed up .pc files won't hurt.
ACKs for top commit:
hebasto:
ACK 8c935e625e.
fanquake:
ACK 8c935e625e
Tree-SHA512: 259c2ad78fb9e90370a7205dc71c40acda1a872f6509435133bc1c4c2c3de57366e80679aa083e13ed85e7966883dc470c0147ee171a2ed0171a18cd5ffc99b3
0388ad0d65 depends: switch zmq to CMake (Cory Fields)
fefb3bbe5b depends: add zeromq no librt patch (fanquake)
a522ef1542 depends: add zeromq cmake minimum patch (fanquake)
cbbc229adf depends: add zeromq windows usage patch (fanquake)
2de68d6d38 depends: add zeromq builtin sha1 patch (fanquake)
0c8605253a depends: add zeromq mktemp macos patch (fanquake)
Pull request description:
This picks up a change, which is a switch to building zeromq with CMake. It includes a number of patches, some which have already been upstreamed (see each patch for details).
ACKs for top commit:
hebasto:
ACK 0388ad0d65.
Tree-SHA512: 5567e432b4e4e0446c41d502bd61810a80b329dea2399b5d9d9f6e79acc450d1c6ba861c8238ba895de98338cfc5dc44ad2bf86ee8c222ecb3fbf47d6eb60da4
The CMake WIN32_WINNT autodetection is broken, and must be set
manually. We may want to set is explicitly in any case, but the
brokenness should also be fixed upstream.
Also patch out depends paths, that would cause non-determinism.
Co-authored-by: fanquake <fanquake@gmail.com>
