260 lines
7.4 KiB
C
260 lines
7.4 KiB
C
/****************************************************************************
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* net/usrsock/usrsock_sockif.c
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#if defined(CONFIG_NET) && defined(CONFIG_NET_USRSOCK)
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <stdbool.h>
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#include <assert.h>
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#include <errno.h>
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#include <debug.h>
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#include <nuttx/net/net.h>
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#include "usrsock/usrsock.h"
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#include "socket/socket.h"
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/****************************************************************************
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* Private Function Prototypes
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****************************************************************************/
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static int usrsock_sockif_setup(FAR struct socket *psock,
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int protocol);
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static sockcaps_t usrsock_sockif_sockcaps(FAR struct socket *psock);
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static void usrsock_sockif_addref(FAR struct socket *psock);
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static int usrsock_sockif_close(FAR struct socket *psock);
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/****************************************************************************
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* Public Data
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****************************************************************************/
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const struct sock_intf_s g_usrsock_sockif =
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{
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usrsock_sockif_setup, /* si_setup */
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usrsock_sockif_sockcaps, /* si_sockcaps */
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usrsock_sockif_addref, /* si_addref */
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usrsock_bind, /* si_bind */
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usrsock_getsockname, /* si_getsockname */
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usrsock_getpeername, /* si_getpeername */
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usrsock_listen, /* si_listen */
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usrsock_connect, /* si_connect */
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usrsock_accept, /* si_accept */
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usrsock_poll, /* si_poll */
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usrsock_sendmsg, /* si_sendmsg */
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usrsock_recvmsg, /* si_recvmsg */
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usrsock_sockif_close, /* si_close */
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usrsock_ioctl /* si_ioctl */
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};
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/****************************************************************************
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* Name: usrsock_sockif_setup
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*
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* Description:
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* Called for socket() to verify that the provided socket type and
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* protocol are usable by this address family. Perform any family-
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* specific socket fields.
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*
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* Input Parameters:
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* psock - A pointer to a user allocated socket structure to be
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* initialized.
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* protocol - (see sys/socket.h)
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*
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* Returned Value:
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* Zero (OK) is returned on success. Otherwise, a negated errno value is
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* returned.
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*
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****************************************************************************/
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static int usrsock_sockif_setup(FAR struct socket *psock, int protocol)
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{
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int domain = psock->s_domain;
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int type = psock->s_type;
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int ret;
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#ifdef CONFIG_NET_USRSOCK_NO_INET
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if (domain == PF_INET)
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{
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return -ENETDOWN;
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}
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#endif
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#ifdef CONFIG_NET_USRSOCK_NO_INET6
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if (domain == PF_INET6)
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{
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return -ENETDOWN;
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}
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#endif
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if (domain == PF_INET || domain == PF_INET6)
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{
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#ifndef CONFIG_NET_USRSOCK_UDP
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if (type == SOCK_DGRAM)
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{
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return -ENETDOWN;
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}
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#endif
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#ifndef CONFIG_NET_USRSOCK_TCP
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if (type == SOCK_STREAM)
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{
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return -ENETDOWN;
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}
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#endif
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}
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else
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{
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#ifndef CONFIG_NET_USRSOCK_OTHER
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return -ENETDOWN;
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#endif
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}
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psock->s_type = PF_UNSPEC;
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psock->s_conn = NULL;
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/* Let the user socket logic handle the setup...
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*
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* A return value of zero means that the operation was
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* successfully handled by usrsock. A negative value means that
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* an error occurred. The special error value -ENETDOWN means
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* that usrsock daemon is not running. The caller should attempt
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* to open socket with kernel networking stack in this case.
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*/
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ret = usrsock_socket(domain, type, protocol, psock);
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if (ret == -ENETDOWN)
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{
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nwarn("WARNING: usrsock daemon is not running\n");
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}
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return ret;
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}
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/****************************************************************************
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* Name: usrsock_sockif_sockcaps
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*
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* Description:
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* Return the bit encoded capabilities of this socket.
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*
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* Input Parameters:
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* psock - Socket structure of the socket whose capabilities are being
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* queried.
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*
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* Returned Value:
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* The non-negative set of socket cababilities is returned.
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*
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****************************************************************************/
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static sockcaps_t usrsock_sockif_sockcaps(FAR struct socket *psock)
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{
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return SOCKCAP_NONBLOCKING;
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}
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/****************************************************************************
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* Name: usrsock_sockif_addref
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*
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* Description:
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* Increment the reference count on the underlying connection structure.
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*
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* Input Parameters:
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* psock - Socket structure of the socket whose reference count will be
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* incremented.
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*
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* Returned Value:
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* None
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*
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****************************************************************************/
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static void usrsock_sockif_addref(FAR struct socket *psock)
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{
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FAR struct usrsock_conn_s *conn;
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DEBUGASSERT(psock != NULL && psock->s_conn != NULL);
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conn = psock->s_conn;
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DEBUGASSERT(conn->crefs > 0 && conn->crefs < 255);
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conn->crefs++;
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}
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/****************************************************************************
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* Name: usrsock_sockif_close
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*
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* Description:
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* Performs the close operation on an USRSOCK socket instance
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*
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* Input Parameters:
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* psock Socket instance
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*
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* Returned Value:
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* 0 on success; -1 on error with errno set appropriately.
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*
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****************************************************************************/
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static int usrsock_sockif_close(FAR struct socket *psock)
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{
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FAR struct usrsock_conn_s *conn = psock->s_conn;
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int ret;
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/* Perform some pre-close operations for the USRSOCK socket type. */
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/* Is this the last reference to the connection structure (there
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* could be more if the socket was dup'ed).
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*/
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if (conn->crefs <= 1)
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{
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/* Yes... inform user-space daemon of socket close. */
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ret = usrsock_close(conn);
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/* Free the connection structure */
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conn->crefs = 0;
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usrsock_free(psock->s_conn);
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if (ret < 0)
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{
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/* Return with error code, but free resources. */
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nerr("ERROR: usrsock_close failed: %d\n", ret);
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return ret;
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}
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}
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else
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{
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/* No.. Just decrement the reference count */
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conn->crefs--;
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}
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return OK;
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}
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#endif /* CONFIG_NET && CONFIG_NET_USRSOCK */
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