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Kernel: Properly implement SO_ERROR option

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This fixes the placeholder stub for the SO_ERROR via getsockopt. It
leverages the m_so_error value that each socket maintains. The SO_ERROR
option obtains and then clears this field, which is useful when checking
for errors that occur between socket calls. This uses an integer value
to return the SO_ERROR status.

Resolves #146
This commit is contained in:
brapru 2021-08-01 16:36:28 -04:00 committed by Andreas Kling
parent 0095c7cb7d
commit 342e1f0a84
Notes: sideshowbarker 2024-07-18 07:09:26 +09:00 
Author: https://github.com/brapru
Commit: https://github.com/SerenityOS/serenity/commit/342e1f0a84f
Pull-request: https://github.com/SerenityOS/serenity/pull/9216
Issue: https://github.com/SerenityOS/serenity/issues/146
Reviewed-by: https://github.com/bgianfo ✅
2 changed files with 3 additions and 5 deletions
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3
Kernel/Net/LocalSocket.cpp
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@ -343,9 +343,8 @@ KResultOr<size_t> LocalSocket::recvfrom(FileDescription& description, UserOrKern
}
} else if (!can_read(description, 0)) {
auto unblock_flags = Thread::FileDescriptionBlocker::BlockFlags::None;
if (Thread::current()->block<Thread::ReadBlocker>({}, description, unblock_flags).was_interrupted()) {
if (Thread::current()->block<Thread::ReadBlocker>({}, description, unblock_flags).was_interrupted())
return set_so_error(EINTR);
}
}
if (!has_attached_peer(description) && socket_buffer->is_empty())
return 0;

5
Kernel/Net/Socket.cpp
View file

@ -181,14 +181,13 @@ KResult Socket::getsockopt(FileDescription&, int level, int option, Userspace<vo
case SO_ERROR: {
if (size < sizeof(int))
return EINVAL;
dbgln("getsockopt(SO_ERROR): FIXME!");
int errno = 0;
int errno = so_error().error();
if (!copy_to_user(static_ptr_cast<int*>(value), &errno))
return EFAULT;
size = sizeof(int);
if (!copy_to_user(value_size, &size))
return EFAULT;
return KSuccess;
return set_so_error(KSuccess);
}
case SO_BINDTODEVICE:
if (size < IFNAMSIZ)