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<title>rt-thread.git/components/net/sal/include/sal_low_lvl.h, branch master</title>
<subtitle>Unnamed repository; edit this file 'description' to name the repository.</subtitle>
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<updated>2026-08-17T09:15:34Z</updated>
<entry>
<title>Add AF_UNIX sockets implementation (#11681)</title>
<updated>2026-08-17T09:15:34Z</updated>
<author>
<name>Bernard Xiong</name>
<email>bernard.xiong@gmail.com</email>
</author>
<published>2026-08-17T09:15:34Z</published>
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<id>urn:sha1:991f0ffca6ca475adcffc7833876bb8151f16e9c</id>
<content type='text'>
* components/dfs: support unix socket nodes

AF_UNIX pathname binding and descriptor passing require DFSv2 socket
nodes and retained open file descriptions across fd tables.

Add socket-node creation for tmpfs and devtmpfs, fd reference helpers,
and socket F_SETFL forwarding.

Impact: DFSv2 socket nodes and descriptor reference handling.
Validation: git diff --cached --check.

* components/net/sal: support local protocol providers

Local IPC protocol families do not have a backing network device.
Store the selected provider in each SAL socket and add a local provider
registry while preserving netdev checks for Internet sockets.

Handle DFSv2 close semantics, socketpair flags, and MSG_CTRUNC for
AF_UNIX integration.

Impact: SAL protocol dispatch for all socket families.
Validation: git diff --cached --check.

* components/lwp: support unix socket messages

Musl AF_UNIX addresses and ancillary data require explicit ABI and
user-memory conversion at the LWP syscall boundary.

Add the musl msghdr layout, bounded address and message copying,
control-message level conversion, and MSG_CTRUNC translation. Correct
receive buffer allocation and copy lengths while handling messages.

Impact: LWP socket syscalls when SAL is enabled.
Validation: git diff --cached --check.

* components/net/af_unix: add local sockets

Add an opt-in AF_UNIX provider for pathname-based local IPC without
a synthetic network device.

Support datagram and stream sockets, blocking and nonblocking I/O,
timeouts, poll, socketpair, and SCM_RIGHTS descriptor passing. Include
bounded Kconfig settings, component documentation, and utest coverage.

Impact: enabled only by RT_USING_AF_UNIX and requires SAL POSIX with
DFSv2.
Validation: git diff --cached --check.

* Fix AF_UNIX CI checks

Apply the repository clang-format rules to the affected source lines.
Suppress the cppcheck false positive for the devtmpfs list iterator.

No functional behavior is changed.

* components/lwp: preserve NULL optional msghdr buffers

When msg_name or msg_control is NULL, keep the kernel pointer NULL
instead of substituting an uninitialized buffer. Reject a NULL control
buffer with a nonzero length as EFAULT.

Impact: LWP sendmsg/recvmsg conversion on MMU targets.
Validation: git diff --cached --check.

* components/net/af_unix: fix poll UAF, namespace leak, and SCM_RIGHTS cycles

Poll only the local wait queue and wake writers from the receiver.
Free namespace entries on detach, and reject AF_UNIX descriptors in
SCM_RIGHTS until cycle collection exists.

Impact: AF_UNIX poll, bind lifetime, and descriptor passing.
Validation: git diff --cached --check.

* components/dfs: add DFSv2 AF_UNIX utest suite

Add opt-in tests under dfs/utest/v2/af_unix for socket nodes, IPC,
poll peer-close, namespace cleanup, and SCM_RIGHTS rejection.

Sources are built only when RT_UTEST_TC_USING_DFS_V2_AF_UNIX and the
selected test groups are enabled.

Impact: DFS utest menu and build; no production AF_UNIX behavior change.
Validation: git diff --cached --check.</content>
</entry>
<entry>
<title>[SAL] Update SAL，Add socketpair sendmsg recvmsg function (#8293)</title>
<updated>2023-11-28T05:56:06Z</updated>
<author>
<name>rcitachi</name>
<email>68690849+rcitachi@users.noreply.github.com</email>
</author>
<published>2023-11-28T05:56:06Z</published>
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</entry>
<entry>
<title>[DFS] prepare for dfs_v2.0 (#7200)</title>
<updated>2023-04-08T14:25:51Z</updated>
<author>
<name>Bernard Xiong</name>
<email>bernard.xiong@gmail.com</email>
</author>
<published>2023-04-08T14:25:51Z</published>
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<id>urn:sha1:9600b75b55dace1c4efef8551059df3d673b21ad</id>
<content type='text'>
* [DFS] prepare for dfs_v2. dfs_fd -&gt; dfs_file; dfs_fnode -&gt; dfs_vnode.

* [BSP] fix code analysis warning

* [smart] fix the pointer overflow.

* code format

* [smart] fix the lwp-&gt;lwp_obj checking.</content>
</entry>
<entry>
<title>rename sal.h as sal_low_lvl.h</title>
<updated>2022-05-16T02:02:22Z</updated>
<author>
<name>Meco Man</name>
<email>920369182@qq.com</email>
</author>
<published>2022-05-16T01:05:50Z</published>
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