399 lines
13 KiB
C
399 lines
13 KiB
C
/****************************************************************************
|
|
* net/usrsock/usrsock_sockif.c
|
|
*
|
|
* Copyright (C) 2017 Haltian Ltd. All rights reserved.
|
|
* Author: Jussi Kivilinna <jussi.kivilinna@haltian.com>
|
|
*
|
|
* 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>
|
|
#if defined(CONFIG_NET) && defined(CONFIG_NET_USRSOCK)
|
|
|
|
#include <sys/types.h>
|
|
#include <sys/socket.h>
|
|
#include <stdbool.h>
|
|
#include <assert.h>
|
|
#include <errno.h>
|
|
#include <debug.h>
|
|
|
|
#include <nuttx/net/net.h>
|
|
|
|
#include "usrsock/usrsock.h"
|
|
#include "socket/socket.h"
|
|
|
|
/****************************************************************************
|
|
* Private Function Prototypes
|
|
****************************************************************************/
|
|
|
|
static int usrsock_sockif_setup(FAR struct socket *psock, int protocol);
|
|
static sockcaps_t usrsock_sockif_sockcaps(FAR struct socket *psock);
|
|
static void usrsock_sockif_addref(FAR struct socket *psock);
|
|
static int usrsock_sockif_listen(FAR struct socket *psock, int backlog);
|
|
static int usrsock_sockif_accept(FAR struct socket *psock,
|
|
FAR struct sockaddr *addr,
|
|
FAR socklen_t *addrlen,
|
|
FAR struct socket *newsock);
|
|
static ssize_t usrsock_sockif_send(FAR struct socket *psock,
|
|
FAR const void *buf, size_t len,
|
|
int flags);
|
|
static int usrsock_sockif_close(FAR struct socket *psock);
|
|
|
|
/****************************************************************************
|
|
* Public Data
|
|
****************************************************************************/
|
|
|
|
const struct sock_intf_s g_usrsock_sockif =
|
|
{
|
|
usrsock_sockif_setup, /* si_setup */
|
|
usrsock_sockif_sockcaps, /* si_sockcaps */
|
|
usrsock_sockif_addref, /* si_addref */
|
|
usrsock_bind, /* si_bind */
|
|
usrsock_getsockname, /* si_getsockname */
|
|
usrsock_sockif_listen, /* si_listen */
|
|
usrsock_connect, /* si_connect */
|
|
usrsock_sockif_accept, /* si_accept */
|
|
#ifndef CONFIG_DISABLE_POLL
|
|
usrsock_poll, /* si_poll */
|
|
#endif
|
|
usrsock_sockif_send, /* si_send */
|
|
usrsock_sendto, /* si_sendto */
|
|
#ifdef CONFIG_NET_SENDFILE
|
|
NULL, /* si_sendfile */
|
|
#endif
|
|
usrsock_recvfrom, /* si_recvfrom */
|
|
usrsock_sockif_close /* si_close */
|
|
};
|
|
|
|
/****************************************************************************
|
|
* Private Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Name: inet_setup
|
|
*
|
|
* Description:
|
|
* Called for socket() to verify that the provided socket type and
|
|
* protocol are usable by this address family. Perform any family-
|
|
* specific socket fields.
|
|
*
|
|
* Parameters:
|
|
* psock A pointer to a user allocated socket structure to be initialized.
|
|
* protocol (see sys/socket.h)
|
|
*
|
|
* Returned Value:
|
|
* Zero (OK) is returned on success. Otherwise, a negater errno value is
|
|
* returned.
|
|
*
|
|
****************************************************************************/
|
|
|
|
static int usrsock_sockif_setup(FAR struct socket *psock, int protocol)
|
|
{
|
|
int domain = psock->s_domain;
|
|
int type = psock->s_type;
|
|
int ret;
|
|
|
|
#ifdef CONFIG_NET_USRSOCK_NO_INET
|
|
if (domain == PF_INET)
|
|
{
|
|
return -ENETDOWN;
|
|
}
|
|
#endif
|
|
|
|
#ifdef CONFIG_NET_USRSOCK_NO_INET6
|
|
if (domain == PF_INET6)
|
|
{
|
|
return -ENETDOWN;
|
|
}
|
|
#endif
|
|
|
|
if (domain == PF_INET || domain == PF_INET6)
|
|
{
|
|
#ifndef CONFIG_NET_USRSOCK_UDP
|
|
if (type == SOCK_DGRAM)
|
|
{
|
|
return -ENETDOWN;
|
|
}
|
|
#endif
|
|
#ifndef CONFIG_NET_USRSOCK_TCP
|
|
if (type == SOCK_STREAM)
|
|
{
|
|
return -ENETDOWN;
|
|
}
|
|
#endif
|
|
}
|
|
else
|
|
{
|
|
#ifndef CONFIG_NET_USRSOCK_OTHER
|
|
return -ENETDOWN;
|
|
#endif
|
|
}
|
|
|
|
psock->s_type = PF_UNSPEC;
|
|
psock->s_conn = NULL;
|
|
|
|
/* Let the user socket logic handle the setup...
|
|
*
|
|
* A return value of zero means that the operation was
|
|
* successfully handled by usrsock. A negative value means that
|
|
* an error occurred. The special error value -ENETDOWN means
|
|
* that usrsock daemon is not running. The caller should attempt
|
|
* to open socket with kernel networking stack in this case.
|
|
*/
|
|
|
|
ret = usrsock_socket(domain, type, protocol, psock);
|
|
if (ret == -ENETDOWN)
|
|
{
|
|
nwarn("WARNING: usrsock daemon is not running\n");
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: usrsock_sockif_sockcaps
|
|
*
|
|
* Description:
|
|
* Return the bit encoded capabilities of this socket.
|
|
*
|
|
* Parameters:
|
|
* psock - Socket structure of the socket whose capabilities are being
|
|
* queried.
|
|
*
|
|
* Returned Value:
|
|
* The non-negative set of socket cababilities is returned.
|
|
*
|
|
****************************************************************************/
|
|
|
|
static sockcaps_t usrsock_sockif_sockcaps(FAR struct socket *psock)
|
|
{
|
|
return SOCKCAP_NONBLOCKING;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: usrsock_sockif_addref
|
|
*
|
|
* Description:
|
|
* Increment the reference count on the underlying connection structure.
|
|
*
|
|
* Parameters:
|
|
* psock - Socket structure of the socket whose reference count will be
|
|
* incremented.
|
|
*
|
|
* Returned Value:
|
|
* None
|
|
*
|
|
****************************************************************************/
|
|
|
|
static void usrsock_sockif_addref(FAR struct socket *psock)
|
|
{
|
|
FAR struct usrsock_conn_s *conn;
|
|
|
|
DEBUGASSERT(psock != NULL && psock->s_conn != NULL);
|
|
|
|
conn = psock->s_conn;
|
|
DEBUGASSERT(conn->crefs > 0 && conn->crefs < 255);
|
|
conn->crefs++;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: usrsock_sockif_listen
|
|
*
|
|
* Description:
|
|
* To accept connections, a socket is first created with psock_socket(), a
|
|
* willingness to accept incoming connections and a queue limit for
|
|
* incoming connections are specified with psock_listen(), and then the
|
|
* connections are accepted with psock_accept(). For the case of AFINET
|
|
* and AFINET6 sockets, psock_listen() calls this function. The
|
|
* psock_listen() call applies only to sockets of type SOCK_STREAM or
|
|
* SOCK_SEQPACKET.
|
|
*
|
|
* Parameters:
|
|
* psock Reference to an internal, boound socket structure.
|
|
* backlog The maximum length the queue of pending connections may grow.
|
|
* If a connection request arrives with the queue full, the client
|
|
* may receive an error with an indication of ECONNREFUSED or,
|
|
* if the underlying protocol supports retransmission, the request
|
|
* may be ignored so that retries succeed.
|
|
*
|
|
* Returned Value:
|
|
* On success, zero is returned. On error, a negated errno value is
|
|
* returned. See list() for the set of appropriate error values.
|
|
*
|
|
****************************************************************************/
|
|
|
|
int usrsock_sockif_listen(FAR struct socket *psock, int backlog)
|
|
{
|
|
#warning "Missing logic for USRSOCK listen"
|
|
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: usrsock_sockif_accept
|
|
*
|
|
* Description:
|
|
* The usrsock_sockif_accept function is used with connection-based socket
|
|
* types (SOCK_STREAM, SOCK_SEQPACKET and SOCK_RDM). It extracts the first
|
|
* connection request on the queue of pending connections, creates a new
|
|
* connected socket with mostly the same properties as 'sockfd', and
|
|
* allocates a new socket descriptor for the socket, which is returned. The
|
|
* newly created socket is no longer in the listening state. The original
|
|
* socket 'sockfd' is unaffected by this call. Per file descriptor flags
|
|
* are not inherited across an inet_accept.
|
|
*
|
|
* The 'sockfd' argument is a socket descriptor that has been created with
|
|
* socket(), bound to a local address with bind(), and is listening for
|
|
* connections after a call to listen().
|
|
*
|
|
* On return, the 'addr' structure is filled in with the address of the
|
|
* connecting entity. The 'addrlen' argument initially contains the size
|
|
* of the structure pointed to by 'addr'; on return it will contain the
|
|
* actual length of the address returned.
|
|
*
|
|
* If no pending connections are present on the queue, and the socket is
|
|
* not marked as non-blocking, inet_accept blocks the caller until a
|
|
* connection is present. If the socket is marked non-blocking and no
|
|
* pending connections are present on the queue, inet_accept returns
|
|
* EAGAIN.
|
|
*
|
|
* Parameters:
|
|
* psock Reference to the listening socket structure
|
|
* addr Receives the address of the connecting client
|
|
* addrlen Input: allocated size of 'addr', Return: returned size of 'addr'
|
|
* newsock Location to return the accepted socket information.
|
|
*
|
|
* Returned Value:
|
|
* Returns 0 (OK) on success. On failure, it returns a negated errno
|
|
* value. See accept() for a desrciption of the approriate error value.
|
|
*
|
|
* Assumptions:
|
|
* The network is locked.
|
|
*
|
|
****************************************************************************/
|
|
|
|
static int usrsock_sockif_accept(FAR struct socket *psock,
|
|
FAR struct sockaddr *addr,
|
|
FAR socklen_t *addrlen,
|
|
FAR struct socket *newsock)
|
|
{
|
|
#warning "Missing logic for USRSOCK accept"
|
|
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: usrsock_sockif_send
|
|
*
|
|
* Description:
|
|
* The usrsock_sockif_send() call may be used only when the socket is in
|
|
* a connected state (so that the intended recipient is known).
|
|
*
|
|
* Parameters:
|
|
* psock An instance of the internal socket structure.
|
|
* buf Data to send
|
|
* len Length of data to send
|
|
* flags Send flags (ignored)
|
|
*
|
|
* 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 usrsock_sockif_send(FAR struct socket *psock,
|
|
FAR const void *buf,
|
|
size_t len, int flags)
|
|
{
|
|
return usrsock_sendto(psock, buf, len, flags, NULL, 0);
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: usrsock_sockif_close
|
|
*
|
|
* Description:
|
|
* Performs the close operation on an USRSOCK socket instance
|
|
*
|
|
* Parameters:
|
|
* psock Socket instance
|
|
*
|
|
* Returned Value:
|
|
* 0 on success; -1 on error with errno set appropriately.
|
|
*
|
|
* Assumptions:
|
|
*
|
|
****************************************************************************/
|
|
|
|
static int usrsock_sockif_close(FAR struct socket *psock)
|
|
{
|
|
FAR struct usrsock_conn_s *conn = psock->s_conn;
|
|
int ret;
|
|
|
|
/* Perform some pre-close operations for the USRSOCK socket type. */
|
|
|
|
/* Is this the last reference to the connection structure (there
|
|
* could be more if the socket was dup'ed).
|
|
*/
|
|
|
|
if (conn->crefs <= 1)
|
|
{
|
|
/* Yes... inform user-space daemon of socket close. */
|
|
|
|
ret = usrsock_close(conn);
|
|
|
|
/* Free the connection structure */
|
|
|
|
conn->crefs = 0;
|
|
usrsock_free(psock->s_conn);
|
|
|
|
if (ret < 0)
|
|
{
|
|
/* Return with error code, but free resources. */
|
|
|
|
nerr("ERROR: usrsock_close failed: %d\n", ret);
|
|
return ret;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/* No.. Just decrement the reference count */
|
|
|
|
conn->crefs--;
|
|
}
|
|
|
|
return OK;
|
|
}
|
|
|
|
#endif /* CONFIG_NET && CONFIG_NET_USRSOCK */
|