diff options
Diffstat (limited to 'nuttx/net/uip/uip_igmpleave.c')
| -rw-r--r-- | nuttx/net/uip/uip_igmpleave.c | 182 |
1 files changed, 0 insertions, 182 deletions
diff --git a/nuttx/net/uip/uip_igmpleave.c b/nuttx/net/uip/uip_igmpleave.c deleted file mode 100644 index 4e08df576..000000000 --- a/nuttx/net/uip/uip_igmpleave.c +++ /dev/null @@ -1,182 +0,0 @@ -/**************************************************************************** - * net/uip/uip_igmpleave.c - * - * Copyright (C) 2010-2011 Gregory Nutt. All rights reserved. - * Author: Gregory Nutt <gnutt@nuttx.org> - * - * The NuttX implementation of IGMP was inspired by the IGMP add-on for the - * lwIP TCP/IP stack by Steve Reynolds: - * - * Copyright (c) 2002 CITEL Technologies Ltd. - * All rights reserved. - * - * 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 of CITEL Technologies Ltd 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 CITEL TECHNOLOGIES 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 CITEL TECHNOLOGIES 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> - -#include <wdog.h> -#include <assert.h> -#include <debug.h> - -#include <nuttx/net/uip/uipopt.h> -#include <nuttx/net/uip/uip.h> -#include <nuttx/net/uip/uip-igmp.h> - -#include "uip_internal.h" - -#ifdef CONFIG_NET_IGMP - -/**************************************************************************** - * Pre-processor Definitions - ****************************************************************************/ - -/**************************************************************************** - * Private Functions - ****************************************************************************/ - -/**************************************************************************** - * Public Functions - ****************************************************************************/ - -/**************************************************************************** - * Name: igmp_leavegroup - * - * Description: - * Remove the specified group address to the group. - * - * RFC 2236, 3. Protocol Description: - * - * "When a host leaves a multicast group, if it was the last host to - * reply to a Query with a Membership Report for that group, it SHOULD - * send a Leave Group message to the all-routers multicast group - * (224.0.0.2). If it was not the last host to reply to a Query, it MAY - * send nothing as there must be another member on the subnet. This is - * an optimization to reduce traffic; a host without sufficient storage - * to remember whether or not it was the last host to reply MAY always - * send a Leave Group message when it leaves a group. Routers SHOULD - * accept a Leave Group message addressed to the group being left, in - * order to accommodate implementations of an earlier version of this - * standard. Leave Group messages are addressed to the all-routers - * group because other group members have no need to know that a host - * has left the group, but it does no harm to address the message to the - * group." - * - * ________________ - * | | - * | | - * | | - * | | - * +--------->| Non-Member |<---------+ - * | | | | - * | | | | - * | | | | - * | |________________| | - * | | | - * | leave group | join group | leave group - * | (stop timer, |(send report, | (send leave - * | send leave if | set flag, | if flag set) - * | flag set) | start timer) | - * ________|________ | ________|________ - * | |<---------+ | | - * | | | | - * | |<-------------------| | - * | | query received | | - * | Delaying Member | (start timer) | Idle Member | - * +---->| |------------------->| | - * | | | report received | | - * | | | (stop timer, | | - * | | | clear flag) | | - * | |_________________|------------------->|_________________| - * | query received | timer expired - * | (reset timer if | (send report, - * | Max Resp Time | set flag) - * | < current timer) | - * +-------------------+ - * - * Assumptions: - * This function cannot be called from interrupt handling logic! - * - ****************************************************************************/ - -int igmp_leavegroup(struct uip_driver_s *dev, FAR const struct in_addr *grpaddr) -{ - struct igmp_group_s *group; - uip_lock_t flags; - - DEBUGASSERT(dev && grpaddr); - - /* Find the entry corresponding to the address leaving the group */ - - group = uip_grpfind(dev, &grpaddr->s_addr); - ndbg("Leaving group: %p\n", group); - if (group) - { - /* Cancel the timer and discard any queued Membership Reports. Canceling - * the timer will prevent any new Membership Reports from being sent; - * clearing the flags will discard any pending Membership Reports that - * could interfere with the Leave Group. - */ - - flags = uip_lock(); - wd_cancel(group->wdog); - CLR_SCHEDMSG(group->flags); - CLR_WAITMSG(group->flags); - uip_unlock(flags); - - IGMP_STATINCR(uip_stat.igmp.leaves); - - /* Send a leave if the flag is set according to the state diagram */ - - if (IS_LASTREPORT(group->flags)) - { - ndbg("Schedule Leave Group message\n"); - IGMP_STATINCR(uip_stat.igmp.leave_sched); - uip_igmpwaitmsg(group, IGMP_LEAVE_GROUP); - } - - /* Free the group structure (state is now Non-Member */ - - uip_grpfree(dev, group); - - /* And remove the group address from the ethernet drivers MAC filter set */ - - uip_removemcastmac(dev, (FAR uip_ipaddr_t *)&grpaddr->s_addr); - return OK; - } - - /* Return ENOENT if the address is not a member of the group */ - - nvdbg("Return -ENOENT\n"); - return -ENOENT; -} - -#endif /* CONFIG_NET_IGMP */ |