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Kernel+LibC+UserspaceEmulator: Add SO_TIMESTAMP, and cmsg definitions

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When SO_TIMESTAMP is set as an option on a SOCK_DGRAM socket, then
recvmsg() will return a SCM_TIMESTAMP control message that
contains a struct timeval with the system time that was current
when the socket was received.
This commit is contained in:
Nico Weber 2020-09-16 12:32:45 -04:00 • committed by Andreas Kling
parent ae5ba4074d
commit 47b3e98af8
6 changed files with 94 additions and 2 deletions
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20
Kernel/Net/Socket.cpp
View file

@ -133,6 +133,17 @@ KResult Socket::setsockopt(int level, int option, Userspace<const void*> user_va
case SO_KEEPALIVE:
// FIXME: Obviously, this is not a real keepalive.
return KSuccess;
case SO_TIMESTAMP:
if (user_value_size != sizeof(int))
return KResult(-EINVAL);
if (!copy_from_user(&m_timestamp, static_ptr_cast<const int*>(user_value)))
return KResult(-EFAULT);
if (m_timestamp && (domain() != AF_INET || type() == SOCK_STREAM)) {
// FIXME: Support SO_TIMESTAMP for more protocols?
m_timestamp = 0;
return KResult(-ENOTSUP);
}
return KSuccess;
default:
dbg() << "setsockopt(" << option << ") at SOL_SOCKET not implemented.";
return KResult(-ENOPROTOOPT);
@ -196,6 +207,15 @@ KResult Socket::getsockopt(FileDescription&, int level, int option, Userspace<vo
return KResult(-EFAULT);
}
case SO_TIMESTAMP:
if (size < sizeof(int))
return KResult(-EINVAL);
if (!copy_to_user(static_ptr_cast<int*>(value), &m_timestamp))
return KResult(-EFAULT);
size = sizeof(int);
if (!copy_to_user(value_size, &size))
return KResult(-EFAULT);
return KSuccess;
default:
dbg() << "getsockopt(" << option << ") at SOL_SOCKET not implemented.";
return KResult(-ENOPROTOOPT);

3
Kernel/Net/Socket.h
View file

@ -135,6 +135,8 @@ public:
bool has_send_timeout() const { return m_send_timeout.tv_sec || m_send_timeout.tv_usec; }
const timeval& send_timeout() const { return m_send_timeout; }
bool wants_timestamp() const { return m_timestamp; }
protected:
Socket(int domain, int type, int protocol);
@ -172,6 +174,7 @@ private:
timeval m_receive_timeout { 0, 0 };
timeval m_send_timeout { 0, 0 };
int m_timestamp { 0 };
NonnullRefPtrVector<Socket> m_pending;
};