diff options
Diffstat (limited to 'nuttx/net/net_close.c')
-rw-r--r-- | nuttx/net/net_close.c | 330 |
1 files changed, 0 insertions, 330 deletions
diff --git a/nuttx/net/net_close.c b/nuttx/net/net_close.c deleted file mode 100644 index dce87ba47..000000000 --- a/nuttx/net/net_close.c +++ /dev/null @@ -1,330 +0,0 @@ -/**************************************************************************** - * net/net_close.c - * - * Copyright (C) 2007-2012 Gregory Nutt. All rights reserved. - * Author: Gregory Nutt <gnutt@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> -#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 <nuttx/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_interrupt - * - * Description: - * Handle uIP callback events. - * - * 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: psock_close - * - * Description: - * Performs the close operation on a socket instance - * - * Parameters: - * psock Socket instance - * - * Returned Value: - * 0 on success; -1 on error with errno set appropriately. - * - * Assumptions: - * - ****************************************************************************/ - -int psock_close(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 psock_close(sockfd_socket(sockfd)); -} - -#endif /* CONFIG_NET */ |