This is an automated email from the ASF dual-hosted git repository.
gnutt pushed a commit to branch SocketCAN
in repository https://gitbox.apache.org/repos/asf/incubator-nuttx.git
commit 8a04d1f65c9f4cc1f3a252707a5f280123cd0b47
Author: Peter van der Perk <peter.vanderp...@nxp.com>
AuthorDate: Wed Mar 11 14:32:52 2020 +0100
Added support for SO_TIMESTAMP in socketlayer and SocketCAN
Cleanup FlexCAN driver driver
Disabled workqueue based TX in FlexCAN
---
net/socket/recvmsg.c | 238 +++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 238 insertions(+)
diff --git a/net/socket/recvmsg.c b/net/socket/recvmsg.c
new file mode 100644
index 0000000..17d4dfe
--- /dev/null
+++ b/net/socket/recvmsg.c
@@ -0,0 +1,238 @@
+/****************************************************************************
+ * net/socket/recvmsg.c
+ *
+ * Copyright (C) 2007-2009, 2011-2017, 2019 Gregory Nutt. All rights
reserved.
+ * Author: Gregory Nutt <gn...@nuttx.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ * used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <assert.h>
+#include <errno.h>
+
+#include <nuttx/cancelpt.h>
+#include <nuttx/net/net.h>
+
+#include "socket/socket.h"
+
+#ifdef CONFIG_NET_RECVMSG_CMSG
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: psock_recvmsg
+ *
+ * Description:
+ * psock_recvfrom() receives messages from a socket, and may be used to
+ * receive data on a socket whether or not it is connection-oriented.
+ * This is an internal OS interface. It is functionally equivalent to
+ * recvfrom() except that:
+ *
+ * - It is not a cancellation point,
+ * - It does not modify the errno variable, and
+ * - I accepts the internal socket structure as an input rather than an
+ * task-specific socket descriptor.
+ *
+ * Input Parameters:
+ * psock - A pointer to a NuttX-specific, internal socket structure
+ * msg Buffer to receive msg
+ * len - Length of buffer
+ * flags - Receive flags
+ *
+ * Returned Value:
+ * On success, returns the number of characters sent. If no data is
+ * available to be received and the peer has performed an orderly shutdown,
+ * recv() will return 0. Otherwise, on any failure, a negated errno value
+ * is returned (see comments with send() for a list of appropriate errno
+ * values).
+ *
+ ****************************************************************************/
+
+ssize_t psock_recvmsg(FAR struct socket *psock, FAR struct msghdr *msg,
+ int flags)
+{
+ /* Verify that non-NULL pointers were passed */
+ if (msg == NULL)
+ {
+ return -EINVAL;
+ }
+
+ if (msg->msg_iovlen != 1)
+ {
+ return -ENOTSUP;
+ }
+
+ /* Verify that the sockfd corresponds to valid, allocated socket */
+
+ if (psock == NULL || psock->s_crefs <= 0)
+ {
+ return -EBADF;
+ }
+
+ /* Let logic specific to this address family handle the recvfrom()
+ * operation.
+ */
+
+ DEBUGASSERT(psock->s_sockif != NULL &&
+ (psock->s_sockif->si_recvmsg != NULL ||
+ psock->s_sockif->si_recvfrom != NULL));
+
+ if(psock->s_sockif->si_recvmsg != NULL)
+ {
+ return psock->s_sockif->si_recvmsg(psock, msg, flags);
+ }
+ else
+ {
+ /* Socket doesn't implement si_recvmsg fallback to si_recvfrom */
+ FAR void *buf = msg->msg_iov->iov_base;
+ FAR struct sockaddr *from = msg->msg_name;
+ FAR socklen_t *fromlen = (FAR socklen_t *)&msg->msg_namelen;
+ size_t len = msg->msg_iov->iov_len;
+ return psock->s_sockif->si_recvfrom(psock, buf, len, flags, from,
fromlen);
+ }
+
+}
+
+/****************************************************************************
+ * Name: nx_recvfrom
+ *
+ * Description:
+ * nx_recvfrom() receives messages from a socket, and may be used to
+ * receive data on a socket whether or not it is connection-oriented.
+ * This is an internal OS interface. It is functionally equivalent to
+ * recvfrom() except that:
+ *
+ * - It is not a cancellation point, and
+ * - It does not modify the errno variable.
+ *
+ * Input Parameters:
+ * sockfd - Socket descriptor of socket
+ * msg Buffer to receive msg
+ * len - Length of buffer
+ * flags - Receive flags
+ *
+ * Returned Value:
+ * On success, returns the number of characters sent. If no data is
+ * available to be received and the peer has performed an orderly shutdown,
+ * recv() will return 0. Otherwise, on any failure, a negated errno value
+ * is returned (see comments with send() for a list of appropriate errno
+ * values).
+ *
+ ****************************************************************************/
+
+ssize_t nx_recvmsg(int sockfd, FAR struct msghdr *msg, int flags)
+{
+ FAR struct socket *psock;
+
+ /* Get the underlying socket structure */
+
+ psock = sockfd_socket(sockfd);
+
+ /* Then let psock_recvmsg() do all of the work */
+
+ return psock_recvmsg(psock, msg, flags);
+}
+
+/****************************************************************************
+ * Function: recvmsg
+ *
+ * Description:
+ * The recvmsg() call is identical to recvfrom() with a NULL from parameter.
+ *
+ * Parameters:
+ * sockfd Socket descriptor of socket
+ * msg Buffer to receive msg
+ * len Length of buffer
+ * flags Receive flags
+ *
+ * Returned Value:
+ * On success, returns the number of characters received. On error,
+ * -1 is returned, and errno is set appropriately:
+ *
+ * EAGAIN
+ * The socket is marked non-blocking and the receive operation would block,
+ * or a receive timeout had been set and the timeout expired before data
+ * was received.
+ * EBADF
+ * The argument sockfd is an invalid descriptor.
+ * ECONNREFUSED
+ * A remote host refused to allow the network connection (typically because
+ * it is not running the requested service).
+ * EFAULT
+ * The receive buffer pointer(s) point outside the process's address space.
+ * EINTR
+ * The receive was interrupted by delivery of a signal before any data were
+ * available.
+ * EINVAL
+ * Invalid argument passed.
+ * ENOMEM
+ * Could not allocate memory.
+ * ENOTCONN
+ * The socket is associated with a connection-oriented protocol and has
+ * not been connected.
+ * ENOTSOCK
+ * The argument sockfd does not refer to a socket.
+ *
+ ****************************************************************************/
+
+ssize_t recvmsg(int sockfd, FAR struct msghdr *msg, int flags)
+{
+ FAR struct socket *psock;
+ ssize_t ret;
+
+ /* recvfrom() is a cancellation point */
+
+ enter_cancellation_point();
+
+ /* Get the underlying socket structure */
+
+ psock = sockfd_socket(sockfd);
+
+ /* Let psock_recvfrom() do all of the work */
+
+ ret = psock_recvmsg(psock, msg, flags);
+ if (ret < 0)
+ {
+ _SO_SETERRNO(psock, -ret);
+ ret = ERROR;
+ }
+
+ leave_cancellation_point();
+ return ret;
+}
+
+#endif /* CONFIG_NET_RECVMSG_CMSG */
