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Kernel: Use Userspace<T> for the getsockopt syscall and Socket interface

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The way getsockopt is implemented for socket types requires us to push
down Userspace<T> using into those interfaces. This change does so, and
utilizes proper copy implementations instead of the kind of haphazard
pointer dereferencing that was occurring there before.
This commit is contained in:
Brian Gianforcaro 2020-08-07 02:29:05 -07:00 • committed by Andreas Kling
parent 6920d5f423
commit 30b2c0dc85
9 changed files with 69 additions and 43 deletions
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20
Kernel/Net/LocalSocket.cpp
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@ -344,24 +344,30 @@ String LocalSocket::absolute_path(const FileDescription& description) const
return builder.to_string();
}
KResult LocalSocket::getsockopt(FileDescription& description, int level, int option, void* value, socklen_t* value_size)
KResult LocalSocket::getsockopt(FileDescription& description, int level, int option, Userspace<void*> value, Userspace<socklen_t*> value_size)
{
if (level != SOL_SOCKET)
return Socket::getsockopt(description, level, option, value, value_size);
socklen_t size;
if (!Process::current()->validate_read_and_copy_typed(&size, value_size))
return KResult(-EFAULT);
switch (option) {
case SO_PEERCRED: {
if (*value_size < sizeof(ucred))
if (size < sizeof(ucred))
return KResult(-EINVAL);
auto& creds = *(ucred*)value;
switch (role(description)) {
case Role::Accepted:
creds = m_origin;
*value_size = sizeof(ucred);
copy_to_user(static_ptr_cast<ucred*>(value), &m_origin);
size = sizeof(ucred);
copy_to_user(value_size, &size);
return KSuccess;
case Role::Connected:
creds = m_acceptor;
*value_size = sizeof(ucred);
copy_to_user(static_ptr_cast<ucred*>(value), &m_acceptor);
size = sizeof(ucred);
copy_to_user(value_size, &size);
return KSuccess;
case Role::Connecting:
return KResult(-ENOTCONN);