diff options
Diffstat (limited to 'nuttx/net/uip/uip_tcpbacklog.c')
| -rw-r--r-- | nuttx/net/uip/uip_tcpbacklog.c | 403 |
1 files changed, 0 insertions, 403 deletions
diff --git a/nuttx/net/uip/uip_tcpbacklog.c b/nuttx/net/uip/uip_tcpbacklog.c deleted file mode 100644 index 459d54312..000000000 --- a/nuttx/net/uip/uip_tcpbacklog.c +++ /dev/null @@ -1,403 +0,0 @@ -/**************************************************************************** - * net/uip/uip_tcpbacklog.c - * - * Copyright (C) 2008-2009, 2011-2012 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/net/uip/uipopt.h> -#if defined(CONFIG_NET) && defined(CONFIG_NET_TCP) && defined(CONFIG_NET_TCPBACKLOG) - -#include <stdint.h> -#include <stdbool.h> -#include <stdlib.h> -#include <queue.h> -#include <debug.h> - -#include <nuttx/net/uip/uip.h> -#include <nuttx/net/uip/uip-tcp.h> - -#include "uip_internal.h" - -/**************************************************************************** - * Private Data - ****************************************************************************/ - -/**************************************************************************** - * Private Functions - ****************************************************************************/ - -/**************************************************************************** - * Public Functions - ****************************************************************************/ - -/**************************************************************************** - * Function: uip_backlogcreate - * - * Description: - * Called from the listen() logic to setup the backlog as specified in the - * the listen arguments. - * - * Assumptions: - * Called from normal user code. Interrupts may be disabled. - * - ****************************************************************************/ - -int uip_backlogcreate(FAR struct uip_conn *conn, int nblg) -{ - FAR struct uip_backlog_s *bls = NULL; - FAR struct uip_blcontainer_s *blc; - uip_lock_t flags; - int size; - int offset; - int i; - - nllvdbg("conn=%p nblg=%d\n", conn, nblg); - -#ifdef CONFIG_DEBUG - if (!conn) - { - return -EINVAL; - } -#endif - - /* Then allocate the backlog as requested */ - - if (nblg > 0) - { - /* Align the list of backlog structures to 32-bit boundaries. This - * may be excessive on 24-16-bit address machines; and insufficient - * on 64-bit address machines -- REVISIT - */ - - offset = (sizeof(struct uip_backlog_s) + 3) & ~3; - - /* Then determine the full size of the allocation include the - * uip_backlog_s, a pre-allocated array of struct uip_blcontainer_s - * and alignement padding - */ - - size = offset + nblg * sizeof(struct uip_blcontainer_s); - - /* Then allocate that much */ - - bls = (FAR struct uip_backlog_s *)zalloc(size); - if (!bls) - { - nlldbg("Failed to allocate backlog\n"); - return -ENOMEM; - } - - /* Then add all of the pre-allocated containers to the free list */ - - blc = (FAR struct uip_blcontainer_s*)(((FAR uint8_t*)bls) + offset); - for (i = 0; i < nblg; i++) - { - sq_addfirst(&blc->bc_node, &bls->bl_free); - } - } - - /* Destroy any existing backlog (shouldn't be any) */ - - flags = uip_lock(); - uip_backlogdestroy(conn); - - /* Now install the backlog tear-off in the connection. NOTE that bls may - * actually be NULL if nblg is <= 0; In that case, we are disabling backlog - * support. Since interrupts are disabled, destroying the old backlog and - * replace it with the new is an atomic operation - */ - - conn->backlog = bls; - uip_unlock(flags); - return OK; -} - -/**************************************************************************** - * Function: uip_backlogdestroy - * - * Description: - * (1) Called from uip_tcpfree() whenever a connection is freed. - * (2) Called from uip_backlogcreate() to destroy any old backlog - * - * NOTE: This function may re-enter uip_tcpfree when a connection that - * is freed that has pending connections. - * - * Assumptions: - * The caller has disabled interrupts so that there can be no conflict - * with ongoing, interrupt driven activity - * - ****************************************************************************/ - -int uip_backlogdestroy(FAR struct uip_conn *conn) -{ - FAR struct uip_backlog_s *blg; - FAR struct uip_blcontainer_s *blc; - FAR struct uip_conn *blconn; - - nllvdbg("conn=%p\n", conn); - -#ifdef CONFIG_DEBUG - if (!conn) - { - return -EINVAL; - } -#endif - - /* Make sure that the connection has a backlog to be destroyed */ - - if (conn->backlog) - { - /* Remove the backlog structure reference from the connection */ - - blg = conn->backlog; - conn->backlog = NULL; - - /* Handle any pending connections in the backlog */ - - while ((blc = (FAR struct uip_blcontainer_s*)sq_remfirst(&blg->bl_pending)) != NULL) - { - blconn = blc->bc_conn; - if (blconn) - { - /* REVISIT -- such connections really need to be gracefully closed */ - - blconn->blparent = NULL; - blconn->backlog = NULL; - blconn->crefs = 0; - uip_tcpfree(blconn); - } - } - - /* Then free the entire backlog structure */ - - free(blg); - } - - return OK; -} - -/**************************************************************************** - * Function: uip_backlogadd - * - * Description: - * Called uip_listen when a new connection is made with a listener socket - * but when there is no accept() in place to receive the connection. This - * function adds the new connection to the backlog. - * - * Assumptions: - * Called from the interrupt level with interrupts disabled - * - ****************************************************************************/ - -int uip_backlogadd(FAR struct uip_conn *conn, FAR struct uip_conn *blconn) -{ - FAR struct uip_backlog_s *bls; - FAR struct uip_blcontainer_s *blc; - int ret = -EINVAL; - - nllvdbg("conn=%p blconn=%p\n", conn, blconn); - -#ifdef CONFIG_DEBUG - if (!conn) - { - return -EINVAL; - } -#endif - - bls = conn->backlog; - if (bls && blconn) - { - /* Allocate a container for the connection from the free list */ - - blc = (FAR struct uip_blcontainer_s *)sq_remfirst(&bls->bl_free); - if (!blc) - { - nlldbg("Failed to allocate container\n"); - ret = -ENOMEM; - } - else - { - /* Save the connection reference in the container and put the - * container at the end of the pending connection list (FIFO). - */ - - blc->bc_conn = blconn; - sq_addlast(&blc->bc_node, &bls->bl_pending); - ret = OK; - } - } - return ret; -} - -/**************************************************************************** - * Function: uip_backlogremove - * - * Description: - * Called from poll(). Before waiting for a new connection, poll will - * call this API to see if there are pending connections in the backlog. - * - * Assumptions: - * Called from normal user code, but with interrupts disabled, - * - ****************************************************************************/ - -#ifndef CONFIG_DISABLE_POLL -bool uip_backlogavailable(FAR struct uip_conn *conn) -{ - return (conn && conn->backlog && !sq_empty(&conn->backlog->bl_pending)); -} -#endif - -/**************************************************************************** - * Function: uip_backlogremove - * - * Description: - * Called from accept(). Before waiting for a new connection, accept will - * call this API to see if there are pending connections in the backlog. - * - * Assumptions: - * Called from normal user code, but with interrupts disabled, - * - ****************************************************************************/ - -struct uip_conn *uip_backlogremove(FAR struct uip_conn *conn) -{ - FAR struct uip_backlog_s *bls; - FAR struct uip_blcontainer_s *blc; - FAR struct uip_conn *blconn = NULL; - -#ifdef CONFIG_DEBUG - if (!conn) - { - return NULL; - } -#endif - - bls = conn->backlog; - if (bls) - { - /* Remove the a container at the head of the pending connection list - * (FIFO) - */ - - blc = (FAR struct uip_blcontainer_s *)sq_remfirst(&bls->bl_pending); - if (blc) - { - /* Extract the connection reference from the container and put - * container in the free list - */ - - blconn = blc->bc_conn; - blc->bc_conn = NULL; - sq_addlast(&blc->bc_node, &bls->bl_free); - } - } - - nllvdbg("conn=%p, returning %p\n", conn, blconn); - return blconn; -} - -/**************************************************************************** - * Function: uip_backlogdelete - * - * Description: - * Called from uip_tcpfree() when a connection is freed that this also - * retained in the pending connectino list of a listener. We simply need - * to remove the defunct connecton from the list. - * - * Assumptions: - * Called from the interrupt level with interrupts disabled - * - ****************************************************************************/ - -int uip_backlogdelete(FAR struct uip_conn *conn, FAR struct uip_conn *blconn) -{ - FAR struct uip_backlog_s *bls; - FAR struct uip_blcontainer_s *blc; - FAR struct uip_blcontainer_s *prev; - - nllvdbg("conn=%p blconn=%p\n", conn, blconn); - -#ifdef CONFIG_DEBUG - if (!conn) - { - return -EINVAL; - } -#endif - - bls = conn->backlog; - if (bls) - { - /* Find the container hold the connection */ - - for (blc = (FAR struct uip_blcontainer_s *)sq_peek(&bls->bl_pending), prev = NULL; - blc; - prev = blc, blc = (FAR struct uip_blcontainer_s *)sq_next(&blc->bc_node)) - { - if (blc->bc_conn == blconn) - { - if (prev) - { - /* Remove the a container from the middle of the list of - * pending connections - */ - - (void)sq_remafter(&prev->bc_node, &bls->bl_pending); - } - else - { - /* Remove the a container from the head of the list of - * pending connections - */ - - (void)sq_remfirst(&bls->bl_pending); - } - - /* Put container in the free list */ - - blc->bc_conn = NULL; - sq_addlast(&blc->bc_node, &bls->bl_free); - return OK; - } - } - - nlldbg("Failed to find pending connection\n"); - return -EINVAL; - } - return OK; -} - -#endif /* CONFIG_NET && CONFIG_NET_TCP && CONFIG_NET_TCPBACKLOG */ |