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Kernel: Support sending filedescriptors with sendmsg(2) and SCM_RIGHTS

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This is necessary to support the wayland protocol.
I also moved the CMSG_* macros to the kernel API since they are used in
both kernel and userspace.
this does not break ntpquery/SCM_TIMESTAMP.
This commit is contained in:
Peter Elliott 2023-02-13 16:01:13 -07:00 • committed by Linus Groh
parent ae5d7f542c
commit f20902deb3
5 changed files with 97 additions and 37 deletions
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20
Kernel/Net/LocalSocket.cpp
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@ -520,6 +520,26 @@ ErrorOr<NonnullLockRefPtr<OpenFileDescription>> LocalSocket::recvfd(OpenFileDesc
return queue.take_first();
}
ErrorOr<NonnullLockRefPtrVector<OpenFileDescription>> LocalSocket::recvfds(OpenFileDescription const& socket_description, int n)
{
MutexLocker locker(mutex());
NonnullLockRefPtrVector<OpenFileDescription> fds;
auto role = this->role(socket_description);
if (role != Role::Connected && role != Role::Accepted)
return set_so_error(EINVAL);
auto& queue = recvfd_queue_for(socket_description);
for (int i = 0; i < n; ++i) {
if (queue.is_empty())
break;
fds.append(queue.take_first());
}
return fds;
}
ErrorOr<void> LocalSocket::try_set_path(StringView path)
{
m_path = TRY(KString::try_create(path));