652 lines
22 KiB
C
652 lines
22 KiB
C
/****************************************************************************
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* net/socket/pkt_sockif.c
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*
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* Copyright (C) 2017-2018 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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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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#include <sys/types.h>
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#include <sys/socket.h>
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#include <stdbool.h>
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#include <string.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 <netpacket/packet.h>
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#include <nuttx/net/net.h>
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#include <nuttx/net/netdev.h>
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#include "netdev/netdev.h"
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#include <socket/socket.h>
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#include "pkt/pkt.h"
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#ifdef CONFIG_NET_PKT
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/****************************************************************************
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* Private Function Prototypes
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****************************************************************************/
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static int pkt_setup(FAR struct socket *psock, int protocol);
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static sockcaps_t pkt_sockcaps(FAR struct socket *psock);
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static void pkt_addref(FAR struct socket *psock);
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static int pkt_bind(FAR struct socket *psock,
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FAR const struct sockaddr *addr, socklen_t addrlen);
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static int pkt_getsockname(FAR struct socket *psock,
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FAR struct sockaddr *addr, FAR socklen_t *addrlen);
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static int pkt_getpeername(FAR struct socket *psock,
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FAR struct sockaddr *addr, FAR socklen_t *addrlen);
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static int pkt_listen(FAR struct socket *psock, int backlog);
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static int pkt_connect(FAR struct socket *psock,
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FAR const struct sockaddr *addr, socklen_t addrlen);
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static int pkt_accept(FAR struct socket *psock,
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FAR struct sockaddr *addr, FAR socklen_t *addrlen,
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FAR struct socket *newsock);
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static int pkt_poll_local(FAR struct socket *psock,
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FAR struct pollfd *fds, bool setup);
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static ssize_t pkt_send(FAR struct socket *psock, FAR const void *buf,
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size_t len, int flags);
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static ssize_t pkt_sendto(FAR struct socket *psock, FAR const void *buf,
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size_t len, int flags, FAR const struct sockaddr *to,
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socklen_t tolen);
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static int pkt_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_pkt_sockif =
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{
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pkt_setup, /* si_setup */
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pkt_sockcaps, /* si_sockcaps */
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pkt_addref, /* si_addref */
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pkt_bind, /* si_bind */
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pkt_getsockname, /* si_getsockname */
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pkt_getpeername, /* si_getpeername */
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pkt_listen, /* si_listen */
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pkt_connect, /* si_connect */
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pkt_accept, /* si_accept */
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pkt_poll_local, /* si_poll */
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pkt_send, /* si_send */
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pkt_sendto, /* si_sendto */
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#ifdef CONFIG_NET_SENDFILE
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NULL, /* si_sendfile */
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#endif
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pkt_recvfrom, /* si_recvfrom */
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pkt_close /* si_close */
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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: pkt_sockif_alloc
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*
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* Description:
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* Allocate and attach a raw packet connection structure.
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*
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****************************************************************************/
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static int pkt_sockif_alloc(FAR struct socket *psock)
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{
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/* Allocate the packet socket connection structure and save in the new
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* socket instance.
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*/
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FAR struct pkt_conn_s *conn = pkt_alloc();
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if (conn == NULL)
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{
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/* Failed to reserve a connection structure */
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return -ENOMEM;
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}
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/* Set the reference count on the connection structure. This reference
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* count will be incremented only if the socket is dup'ed
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*/
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DEBUGASSERT(conn->crefs == 0);
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conn->crefs = 1;
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/* Save the pre-allocated connection in the socket structure */
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psock->s_conn = conn;
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return OK;
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}
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/****************************************************************************
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* Name: pkt_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 pkt_setup(FAR struct socket *psock, int protocol)
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{
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/* Allocate the appropriate connection structure. This reserves the
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* the connection structure is is unallocated at this point. It will
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* not actually be initialized until the socket is connected.
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*
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* Only SOCK_RAW is supported.
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*/
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if (psock->s_type == SOCK_RAW)
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{
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return pkt_sockif_alloc(psock);
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}
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else
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{
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return -EPROTONOSUPPORT;
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}
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}
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/****************************************************************************
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* Name: pkt_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 set of socket capabilities is returned.
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*
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****************************************************************************/
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static sockcaps_t pkt_sockcaps(FAR struct socket *psock)
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{
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return 0;
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}
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/****************************************************************************
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* Name: pkt_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 pkt_addref(FAR struct socket *psock)
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{
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FAR struct pkt_conn_s *conn;
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DEBUGASSERT(psock != NULL && psock->s_conn != NULL &&
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psock->s_type == SOCK_RAW);
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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: pkt_connect
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*
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* Description:
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* pkt_connect() connects the local socket referred to by the structure
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* 'psock' to the address specified by 'addr'. The addrlen argument
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* specifies the size of 'addr'. The format of the address in 'addr' is
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* determined by the address space of the socket 'psock'.
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*
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* If the socket 'psock' is of type SOCK_DGRAM then 'addr' is the address
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* to which datagrams are sent by default, and the only address from which
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* datagrams are received. If the socket is of type SOCK_STREAM or
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* SOCK_SEQPACKET, this call attempts to make a connection to the socket
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* that is bound to the address specified by 'addr'.
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*
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* Generally, connection-based protocol sockets may successfully
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* pkt_connect() only once; connectionless protocol sockets may use
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* pkt_connect() multiple times to change their association.
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* Connectionless sockets may dissolve the association by connecting to
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* an address with the sa_family member of sockaddr set to AF_UNSPEC.
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*
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* Input Parameters:
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* psock Pointer to a socket structure initialized by psock_socket()
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* addr Server address (form depends on type of socket)
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* addrlen Length of actual 'addr'
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*
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* Returned Value:
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* 0 on success; a negated errno value on failure. See connect() for the
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* list of appropriate errno values to be returned.
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*
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****************************************************************************/
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static int pkt_connect(FAR struct socket *psock,
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FAR const struct sockaddr *addr, socklen_t addrlen)
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{
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return -EAFNOSUPPORT;
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}
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/****************************************************************************
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* Name: pkt_accept
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*
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* Description:
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* The pkt_accept function is used with connection-based socket types
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* (SOCK_STREAM, SOCK_SEQPACKET and SOCK_RDM). It extracts the first
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* connection request on the queue of pending connections, creates a new
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* connected socket with mostly the same properties as 'sockfd', and
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* allocates a new socket descriptor for the socket, which is returned. The
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* newly created socket is no longer in the listening state. The original
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* socket 'sockfd' is unaffected by this call. Per file descriptor flags
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* are not inherited across an pkt_accept.
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*
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* The 'sockfd' argument is a socket descriptor that has been created with
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* socket(), bound to a local address with bind(), and is listening for
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* connections after a call to listen().
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*
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* On return, the 'addr' structure is filled in with the address of the
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* connecting entity. The 'addrlen' argument initially contains the size
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* of the structure pointed to by 'addr'; on return it will contain the
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* actual length of the address returned.
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*
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* If no pending connections are present on the queue, and the socket is
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* not marked as non-blocking, pkt_accept blocks the caller until a
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* connection is present. If the socket is marked non-blocking and no
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* pending connections are present on the queue, pkt_accept returns
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* EAGAIN.
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*
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* Input Parameters:
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* psock Reference to the listening socket structure
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* addr Receives the address of the connecting client
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* addrlen Input: allocated size of 'addr', Return: returned size of
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* 'addr'
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* newsock Location to return the accepted socket information.
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*
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* Returned Value:
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* Returns 0 (OK) on success. On failure, it returns a negated errno
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* value. See accept() for a desrciption of the appropriate error value.
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*
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* Assumptions:
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* The network is locked.
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*
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****************************************************************************/
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static int pkt_accept(FAR struct socket *psock, FAR struct sockaddr *addr,
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FAR socklen_t *addrlen, FAR struct socket *newsock)
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{
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return -EAFNOSUPPORT;
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}
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/****************************************************************************
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* Name: pkt_bind
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*
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* Description:
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* pkt_bind() gives the socket 'psock' the local address 'addr'. 'addr'
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* is 'addrlen' bytes long. Traditionally, this is called "assigning a
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* name to a socket." When a socket is created with socket(), it exists
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* in a name space (address family) but has no name assigned.
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*
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* Input Parameters:
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* psock Socket structure of the socket to bind
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* addr Socket local address
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* addrlen Length of 'addr'
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*
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* Returned Value:
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* 0 on success; A negated errno value is returned on failure. See
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* bind() for a list a appropriate error values.
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*
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****************************************************************************/
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static int pkt_bind(FAR struct socket *psock,
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FAR const struct sockaddr *addr, socklen_t addrlen)
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{
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int ifindex;
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/* Verify that a valid address has been provided */
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if (addr->sa_family != AF_PACKET || addrlen < sizeof(struct sockaddr_ll))
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{
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nerr("ERROR: Invalid address length: %d < %d\n",
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addrlen, sizeof(struct sockaddr_ll));
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return -EBADF;
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}
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/* Bind a raw socket to an network device. */
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if (psock->s_type == SOCK_RAW)
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{
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FAR struct pkt_conn_s *conn = (FAR struct pkt_conn_s *)psock->s_conn;
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FAR struct net_driver_s *dev;
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/* Look at the addr and identify network interface */
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ifindex = ((FAR struct sockaddr_ll *)addr)->sll_ifindex;
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/* Get the MAC address of that interface */
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dev = netdev_findbyindex(ifindex);
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if (dev == NULL)
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{
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return -EADDRNOTAVAIL;
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}
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/* Only Ethernet is supported */
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if (dev->d_lltype != NET_LL_ETHERNET &&
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dev->d_lltype != NET_LL_IEEE80211)
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{
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return -EAFNOSUPPORT;
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}
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/* Put ifindex and mac address into connection */
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conn->ifindex = ifindex;
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memcpy(conn->lmac, dev->d_mac.ether.ether_addr_octet, 6);
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return OK;
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}
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else
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{
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return -EBADF;
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}
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}
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/****************************************************************************
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* Name: pkt_getsockname
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*
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* Description:
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* The pkt_getsockname() function retrieves the locally-bound name of the
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* specified packet socket, stores this address in the sockaddr structure
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* pointed to by the 'addr' argument, and stores the length of this
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* address in the object pointed to by the 'addrlen' argument.
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*
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* If the actual length of the address is greater than the length of the
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* supplied sockaddr structure, the stored address will be truncated.
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*
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* If the socket has not been bound to a local name, the value stored in
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* the object pointed to by address is unspecified.
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*
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* Input Parameters:
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* psock Socket structure of the socket to be queried
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* addr sockaddr structure to receive data [out]
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* addrlen Length of sockaddr structure [in/out]
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*
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* Returned Value:
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* On success, 0 is returned, the 'addr' argument points to the address
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* of the socket, and the 'addrlen' argument points to the length of the
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* address. Otherwise, a negated errno value is returned. See
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* getsockname() for the list of appropriate error numbers.
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*
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****************************************************************************/
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static int pkt_getsockname(FAR struct socket *psock,
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FAR struct sockaddr *addr, FAR socklen_t *addrlen)
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{
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return -EAFNOSUPPORT;
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}
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/****************************************************************************
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* Name: pkt_getpeername
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*
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* Description:
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* The pkt_getpeername() function retrieves the remote-connected name of
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* the specified packet socket, stores this address in the sockaddr
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* structure pointed to by the 'addr' argument, and stores the length of
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* this address in the object pointed to by the 'addrlen' argument.
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*
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* If the actual length of the address is greater than the length of the
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* supplied sockaddr structure, the stored address will be truncated.
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*
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* If the socket has not been bound to a local name, the value stored in
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* the object pointed to by address is unspecified.
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*
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* Parameters:
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* psock Socket structure of the socket to be queried
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* addr sockaddr structure to receive data [out]
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* addrlen Length of sockaddr structure [in/out]
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*
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* Returned Value:
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* On success, 0 is returned, the 'addr' argument points to the address
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* of the socket, and the 'addrlen' argument points to the length of the
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* address. Otherwise, a negated errno value is returned. See
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* getpeername() for the list of appropriate error numbers.
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*
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****************************************************************************/
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static int pkt_getpeername(FAR struct socket *psock,
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FAR struct sockaddr *addr, FAR socklen_t *addrlen)
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{
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return -EAFNOSUPPORT;
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}
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/****************************************************************************
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* Name: pkt_listen
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*
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* Description:
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* To accept connections, a socket is first created with psock_socket(), a
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* willingness to accept incoming connections and a queue limit for
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* incoming connections are specified with psock_listen(), and then the
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* connections are accepted with psock_accept(). For the case of raw
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* packet sockets, psock_listen() calls this function. The psock_listen()
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* call applies only to sockets of type SOCK_STREAM or SOCK_SEQPACKET.
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*
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* Input Parameters:
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* psock Reference to an internal, boound socket structure.
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* backlog The maximum length the queue of pending connections may grow.
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* If a connection request arrives with the queue full, the client
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* may receive an error with an indication of ECONNREFUSED or,
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* if the underlying protocol supports retransmission, the request
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* may be ignored so that retries succeed.
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*
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* Returned Value:
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* On success, zero is returned. On error, a negated errno value is
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* returned. See list() for the set of appropriate error values.
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*
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****************************************************************************/
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int pkt_listen(FAR struct socket *psock, int backlog)
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{
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return -EOPNOTSUPP;
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}
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/****************************************************************************
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* Name: pkt_poll
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*
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* Description:
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* The standard poll() operation redirects operations on socket descriptors
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* to net_poll which, indiectly, calls to function.
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*
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* Input Parameters:
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* psock - An instance of the internal socket structure.
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* fds - The structure describing the events to be monitored, OR NULL if
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* this is a request to stop monitoring events.
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* setup - true: Setup up the poll; false: Teardown the poll
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*
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* Returned Value:
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* 0: Success; Negated errno on failure
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*
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****************************************************************************/
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static int pkt_poll_local(FAR struct socket *psock, FAR struct pollfd *fds,
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bool setup)
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{
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return -ENOSYS;
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}
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|
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/****************************************************************************
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* Name: pkt_send
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*
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* Description:
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* Socket send() method for the raw packet socket.
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*
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* Input Parameters:
|
|
* psock An instance of the internal socket structure.
|
|
* buf Data to send
|
|
* len Length of data to send
|
|
* flags Send flags
|
|
*
|
|
* Returned Value:
|
|
* On success, returns the number of characters sent. On error, a negated
|
|
* errno value is returned (see send() for the list of appropriate error
|
|
* values.
|
|
*
|
|
****************************************************************************/
|
|
|
|
static ssize_t pkt_send(FAR struct socket *psock, FAR const void *buf,
|
|
size_t len, int flags)
|
|
{
|
|
ssize_t ret;
|
|
|
|
/* Only SOCK_RAW is supported */
|
|
|
|
if (psock->s_type == SOCK_RAW)
|
|
{
|
|
/* Raw packet send */
|
|
|
|
ret = psock_pkt_send(psock, buf, len);
|
|
}
|
|
else
|
|
{
|
|
/* EDESTADDRREQ. Signifies that the socket is not connection-mode and
|
|
* no peer address is set.
|
|
*/
|
|
|
|
ret = -EDESTADDRREQ;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: pkt_sendto
|
|
*
|
|
* Description:
|
|
* Implements the sendto() operation for the case of the raw packet socket.
|
|
*
|
|
* Input Parameters:
|
|
* psock A pointer to a NuttX-specific, internal socket structure
|
|
* buf Data to send
|
|
* len Length of data to send
|
|
* flags Send flags
|
|
* to Address of recipient
|
|
* tolen The length of the address structure
|
|
*
|
|
* Returned Value:
|
|
* On success, returns the number of characters sent. On error, a negated
|
|
* errno value is returned (see send_to() for the list of appropriate error
|
|
* values.
|
|
*
|
|
****************************************************************************/
|
|
|
|
static ssize_t pkt_sendto(FAR struct socket *psock, FAR const void *buf,
|
|
size_t len, int flags,
|
|
FAR const struct sockaddr *to, socklen_t tolen)
|
|
{
|
|
nerr("ERROR: sendto() not supported for raw packet sockets\n");
|
|
return -EAFNOSUPPORT;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: pkt_close
|
|
*
|
|
* Description:
|
|
* Performs the close operation on a raw packet socket instance
|
|
*
|
|
* Input Parameters:
|
|
* psock Socket instance
|
|
*
|
|
* Returned Value:
|
|
* 0 on success; a negated errno value is returned on any failure.
|
|
*
|
|
* Assumptions:
|
|
*
|
|
****************************************************************************/
|
|
|
|
static int pkt_close(FAR struct socket *psock)
|
|
{
|
|
/* Perform some pre-close operations for the raw packet address type */
|
|
|
|
switch (psock->s_type)
|
|
{
|
|
case SOCK_RAW:
|
|
{
|
|
FAR struct pkt_conn_s *conn = psock->s_conn;
|
|
|
|
/* Is this the last reference to the connection structure (there
|
|
* could be more if the socket was dup'ed).
|
|
*/
|
|
|
|
if (conn->crefs <= 1)
|
|
{
|
|
/* Yes... free the connection structure */
|
|
|
|
conn->crefs = 0; /* No more references on the connection */
|
|
pkt_free(psock->s_conn); /* Free network resources */
|
|
}
|
|
else
|
|
{
|
|
/* No.. Just decrement the reference count */
|
|
|
|
conn->crefs--;
|
|
}
|
|
|
|
return OK;
|
|
}
|
|
|
|
default:
|
|
return -EBADF;
|
|
}
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Public Functions
|
|
****************************************************************************/
|
|
|
|
#endif /* CONFIG_NET_PKT */
|