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Kernel+LibC+UserspaceEmulator: Add SO_TIMESTAMP, and cmsg definitions
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.
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commit
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6 changed files with 94 additions and 2 deletions
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@ -133,6 +133,17 @@ KResult Socket::setsockopt(int level, int option, Userspace<const void*> user_va
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case SO_KEEPALIVE:
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// FIXME: Obviously, this is not a real keepalive.
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return KSuccess;
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case SO_TIMESTAMP:
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if (user_value_size != sizeof(int))
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return KResult(-EINVAL);
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if (!copy_from_user(&m_timestamp, static_ptr_cast<const int*>(user_value)))
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return KResult(-EFAULT);
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if (m_timestamp && (domain() != AF_INET || type() == SOCK_STREAM)) {
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// FIXME: Support SO_TIMESTAMP for more protocols?
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m_timestamp = 0;
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return KResult(-ENOTSUP);
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}
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return KSuccess;
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default:
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dbg() << "setsockopt(" << option << ") at SOL_SOCKET not implemented.";
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return KResult(-ENOPROTOOPT);
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@ -196,6 +207,15 @@ KResult Socket::getsockopt(FileDescription&, int level, int option, Userspace<vo
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return KResult(-EFAULT);
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}
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case SO_TIMESTAMP:
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if (size < sizeof(int))
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return KResult(-EINVAL);
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if (!copy_to_user(static_ptr_cast<int*>(value), &m_timestamp))
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return KResult(-EFAULT);
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size = sizeof(int);
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if (!copy_to_user(value_size, &size))
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return KResult(-EFAULT);
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return KSuccess;
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default:
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dbg() << "getsockopt(" << option << ") at SOL_SOCKET not implemented.";
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return KResult(-ENOPROTOOPT);
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@ -135,6 +135,8 @@ public:
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bool has_send_timeout() const { return m_send_timeout.tv_sec || m_send_timeout.tv_usec; }
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const timeval& send_timeout() const { return m_send_timeout; }
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bool wants_timestamp() const { return m_timestamp; }
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protected:
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Socket(int domain, int type, int protocol);
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@ -172,6 +174,7 @@ private:
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timeval m_receive_timeout { 0, 0 };
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timeval m_send_timeout { 0, 0 };
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int m_timestamp { 0 };
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NonnullRefPtrVector<Socket> m_pending;
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};
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@ -264,6 +264,23 @@ ssize_t Process::sys$recvmsg(int sockfd, Userspace<struct msghdr*> user_msg, int
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msg_flags |= MSG_TRUNC;
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}
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if (socket.wants_timestamp()) {
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struct {
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cmsghdr cmsg;
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timeval timestamp;
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} cmsg_timestamp;
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socklen_t control_length = sizeof(cmsg_timestamp);
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if (msg.msg_controllen < control_length) {
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msg_flags |= MSG_CTRUNC;
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} else {
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cmsg_timestamp = { { control_length, SOL_SOCKET, SCM_TIMESTAMP }, timestamp };
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if (!copy_to_user(msg.msg_control, &cmsg_timestamp, control_length))
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return -EFAULT;
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}
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if (!copy_to_user(&user_msg.unsafe_userspace_ptr()->msg_controllen, &control_length))
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return -EFAULT;
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}
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if (!copy_to_user(&user_msg.unsafe_userspace_ptr()->msg_flags, &msg_flags))
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return -EFAULT;
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@ -458,6 +458,7 @@ struct pollfd {
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#define SHUT_RDWR 3
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#define MSG_TRUNC 0x1
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#define MSG_CTRUNC 0x2
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#define MSG_DONTWAIT 0x40
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#define SOL_SOCKET 1
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@ -471,6 +472,11 @@ enum {
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SO_REUSEADDR,
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SO_BINDTODEVICE,
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SO_KEEPALIVE,
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SO_TIMESTAMP,
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};
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enum {
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SCM_TIMESTAMP,
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};
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#define IPPROTO_IP 0
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@ -556,6 +562,12 @@ struct iovec {
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size_t iov_len;
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};
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struct cmsghdr {
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socklen_t cmsg_len;
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int cmsg_level;
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int cmsg_type;
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};
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struct msghdr {
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void* msg_name;
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socklen_t msg_namelen;
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