72e03e53ea
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@3384 42af7a65-404d-4744-a932-0658087f49c3
331 lines
9.5 KiB
C
331 lines
9.5 KiB
C
/****************************************************************************
|
|
* net/net_close.c
|
|
*
|
|
* Copyright (C) 2007-2011 Gregory Nutt. All rights reserved.
|
|
* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
|
|
*
|
|
* 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>
|
|
#ifdef CONFIG_NET
|
|
|
|
#include <sys/types.h>
|
|
#include <sys/socket.h>
|
|
#include <stdint.h>
|
|
#include <errno.h>
|
|
#include <debug.h>
|
|
|
|
#include <arch/irq.h>
|
|
#include <net/uip/uip-arch.h>
|
|
|
|
#include "net_internal.h"
|
|
#include "uip/uip_internal.h"
|
|
|
|
/****************************************************************************
|
|
* Private Types
|
|
****************************************************************************/
|
|
|
|
#ifdef CONFIG_NET_TCP
|
|
struct tcp_close_s
|
|
{
|
|
FAR struct socket *cl_psock; /* Reference to the TCP socket */
|
|
FAR struct uip_callback_s *cl_cb; /* Reference to TCP callback instance */
|
|
sem_t cl_sem; /* Semaphore signals disconnect completion */
|
|
};
|
|
#endif
|
|
|
|
/****************************************************************************
|
|
* Private Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Function: netclose_disconnect
|
|
*
|
|
* Description:
|
|
* Break any current TCP connection
|
|
*
|
|
* Parameters:
|
|
* conn - uIP TCP connection structure
|
|
*
|
|
* Returned Value:
|
|
* None
|
|
*
|
|
* Assumptions:
|
|
* Called from normal user-level logic
|
|
*
|
|
****************************************************************************/
|
|
|
|
#ifdef CONFIG_NET_TCP
|
|
static uint16_t netclose_interrupt(struct uip_driver_s *dev, void *pvconn,
|
|
void *pvpriv, uint16_t flags)
|
|
{
|
|
struct tcp_close_s *pstate = (struct tcp_close_s *)pvpriv;
|
|
|
|
nllvdbg("flags: %04x\n", flags);
|
|
|
|
if (pstate)
|
|
{
|
|
/* UIP_CLOSE: The remote host has closed the connection
|
|
* UIP_ABORT: The remote host has aborted the connection
|
|
*/
|
|
|
|
if ((flags & (UIP_CLOSE|UIP_ABORT)) != 0)
|
|
{
|
|
/* The disconnection is complete */
|
|
|
|
pstate->cl_cb->flags = 0;
|
|
pstate->cl_cb->priv = NULL;
|
|
pstate->cl_cb->event = NULL;
|
|
sem_post(&pstate->cl_sem);
|
|
nllvdbg("Resuming\n");
|
|
}
|
|
else
|
|
{
|
|
/* Drop data received in this state and make sure that UIP_CLOSE
|
|
* is set in the response
|
|
*/
|
|
|
|
dev->d_len = 0;
|
|
return (flags & ~UIP_NEWDATA) | UIP_CLOSE;
|
|
}
|
|
}
|
|
|
|
return flags;
|
|
}
|
|
#endif /* CONFIG_NET_TCP */
|
|
|
|
/****************************************************************************
|
|
* Function: netclose_disconnect
|
|
*
|
|
* Description:
|
|
* Break any current TCP connection
|
|
*
|
|
* Parameters:
|
|
* conn - uIP TCP connection structure
|
|
*
|
|
* Returned Value:
|
|
* None
|
|
*
|
|
* Assumptions:
|
|
* Called from normal user-level logic
|
|
*
|
|
****************************************************************************/
|
|
|
|
#ifdef CONFIG_NET_TCP
|
|
static inline void netclose_disconnect(FAR struct socket *psock)
|
|
{
|
|
struct tcp_close_s state;
|
|
uip_lock_t flags;
|
|
|
|
/* Interrupts are disabled here to avoid race conditions */
|
|
|
|
flags = uip_lock();
|
|
|
|
/* Is the TCP socket in a connected state? */
|
|
|
|
if (_SS_ISCONNECTED(psock->s_flags))
|
|
{
|
|
struct uip_conn *conn = (struct uip_conn*)psock->s_conn;
|
|
|
|
/* Check for the case where the host beat us and disconnected first */
|
|
|
|
if (conn->tcpstateflags == UIP_ESTABLISHED)
|
|
{
|
|
/* Set up to receive TCP data event callbacks */
|
|
|
|
state.cl_cb = uip_tcpcallbackalloc(conn);
|
|
if (state.cl_cb)
|
|
{
|
|
state.cl_psock = psock;
|
|
sem_init(&state.cl_sem, 0, 0);
|
|
|
|
state.cl_cb->flags = UIP_NEWDATA|UIP_POLL|UIP_CLOSE|UIP_ABORT;
|
|
state.cl_cb->priv = (void*)&state;
|
|
state.cl_cb->event = netclose_interrupt;
|
|
|
|
/* Notify the device driver of the availaibilty of TX data */
|
|
|
|
netdev_txnotify(&conn->ripaddr);
|
|
|
|
/* Wait for the disconnect event */
|
|
|
|
(void)uip_lockedwait(&state.cl_sem);
|
|
|
|
/* We are now disconnected */
|
|
|
|
sem_destroy(&state.cl_sem);
|
|
uip_tcpcallbackfree(conn, state.cl_cb);
|
|
}
|
|
}
|
|
}
|
|
|
|
uip_unlock(flags);
|
|
}
|
|
#endif
|
|
|
|
/****************************************************************************
|
|
* Public Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Function: net_closesocket
|
|
*
|
|
* Description:
|
|
* Performs the close operation on asocket instance
|
|
*
|
|
* Parameters:
|
|
* psock Socket instance
|
|
*
|
|
* Returned Value:
|
|
* 0 on success; -1 on error with errno set appropriately.
|
|
*
|
|
* Assumptions:
|
|
*
|
|
****************************************************************************/
|
|
|
|
int net_closesocket(FAR struct socket *psock)
|
|
{
|
|
int err;
|
|
|
|
/* Verify that the sockfd corresponds to valid, allocated socket */
|
|
|
|
if (!psock || psock->s_crefs <= 0)
|
|
{
|
|
err = EBADF;
|
|
goto errout;
|
|
}
|
|
|
|
/* We perform the uIP close operation only if this is the last count on the socket.
|
|
* (actually, I think the socket crefs only takes the values 0 and 1 right now).
|
|
*/
|
|
|
|
if (psock->s_crefs <= 1)
|
|
{
|
|
/* Perform uIP side of the close depending on the protocol type */
|
|
|
|
switch (psock->s_type)
|
|
{
|
|
#ifdef CONFIG_NET_TCP
|
|
case SOCK_STREAM:
|
|
{
|
|
struct uip_conn *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 */
|
|
|
|
uip_unlisten(conn); /* No longer accepting connections */
|
|
netclose_disconnect(psock); /* Break any current connections */
|
|
conn->crefs = 0; /* No more references on the connection */
|
|
uip_tcpfree(conn); /* Free uIP resources */
|
|
}
|
|
else
|
|
{
|
|
/* No.. Just decrement the reference count */
|
|
|
|
conn->crefs--;
|
|
}
|
|
}
|
|
break;
|
|
#endif
|
|
|
|
#ifdef CONFIG_NET_UDP
|
|
case SOCK_DGRAM:
|
|
{
|
|
struct uip_udp_conn *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 */
|
|
uip_udpfree(psock->s_conn); /* Free uIP resources */
|
|
}
|
|
else
|
|
{
|
|
/* No.. Just decrement the reference count */
|
|
|
|
conn->crefs--;
|
|
}
|
|
}
|
|
break;
|
|
#endif
|
|
|
|
default:
|
|
err = EBADF;
|
|
goto errout;
|
|
}
|
|
}
|
|
|
|
/* Then release our reference on the socket structure containing the connection */
|
|
|
|
sock_release(psock);
|
|
return OK;
|
|
|
|
errout:
|
|
errno = err;
|
|
return ERROR;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Function: net_close
|
|
*
|
|
* Description:
|
|
* Performs the close operation on socket descriptors
|
|
*
|
|
* Parameters:
|
|
* sockfd Socket descriptor of socket
|
|
*
|
|
* Returned Value:
|
|
* 0 on success; -1 on error with errno set appropriately.
|
|
*
|
|
* Assumptions:
|
|
*
|
|
****************************************************************************/
|
|
|
|
int net_close(int sockfd)
|
|
{
|
|
return net_closesocket(sockfd_socket(sockfd));
|
|
}
|
|
|
|
#endif /* CONFIG_NET */
|