5b7ef856a0
net/mld: The MLD logic now compiles and is much less toxic. It still is not a proper MLD implementation: (1) It is basically a port of IGMP, tweaked to work with IPv6 and ICMPv6 MLD messages, (2) it needs a proper analysis and comparison with RFC 3810, and (3) it is completely untested. For this reason, it will remain EXPERIMENTAL for some time. net/mld: Add some missing macros, more fixes related to IPv6 vs IPv4 types, net/mld: More compilation cleaning. Most fixups for IPv6 vs IPv4 types. net/mld: Hook crudely converted .c files into build system and resolve a few of the many, many compilation/design problems. net/mld: Add support for MLD statistics. net/mld: Hook in MLD poll and packet transmission logic. net/mld: Change references to IPv4 definitions to IPv6 definitions; Remove mld_input() since MLD piggybacks on ICMPv6 input. Add functions to catch MLD messages dispatched by ICMPv6 input logic. net/mld: As a starting point, copy all net/igmp/*.c files to net/mld/. and change all occurrences of igmp (or IGMP) to mld (or MLD). net/mld: More compilation cleaning. Most fixups for IPv6 vs IPv4 types. net/mld: Hook crudely converted .c files into build system and resolve a few of the many, many compilation/design problems. net/mld: Add support for MLD statistics. net/mld: Hook in MLD poll and packet transmission logic. net/mld: Change references to IPv4 definitions to IPv6 definitions; Remove mld_input() since MLD piggybacks on ICMPv6 input. Add functions to catch MLD messages dispatched by ICMPv6 input logic. net/mld: As a starting point, copy all net/igmp/*.c files to net/mld/. and change all occurrences of igmp (or IGMP) to mld (or MLD).
148 lines
5.2 KiB
C
148 lines
5.2 KiB
C
/****************************************************************************
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* net/mld/mld_report.c
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*
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* Copyright (C) 2018 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of CITEL Technologies Ltd nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY CITEL TECHNOLOGIES AND CONTRIBUTORS ``AS IS''
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL CITEL TECHNOLOGIES OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <assert.h>
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#include <debug.h>
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#include <nuttx/wdog.h>
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#include <nuttx/net/netstats.h>
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#include <nuttx/net/ip.h>
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#include <nuttx/net/mld.h>
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#include "devif/devif.h"
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#include "mld/mld.h"
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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#define IPv6BUF ((FAR struct ipv6_hdr_s *)&dev->d_buf[NET_LL_HDRLEN(dev)])
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: mld_report_v1
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*
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* Description:
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* Called from icmpv6_input() when a Version 1 or Version 2 Multicast
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* Listener Report is received.
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*
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****************************************************************************/
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int mld_report_v1(FAR struct net_driver_s *dev,
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FAR const struct mld_mcast_listen_report_v1_s *report)
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{
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FAR struct ipv6_hdr_s *ipv6 = IPv6BUF;
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FAR struct mld_group_s *group;
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ninfo("Version 1 Multicast Listener Report\n");
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ninfo("destipaddr: %04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x\n",
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ipv6->destipaddr[0], ipv6->destipaddr[1], ipv6->destipaddr[2],
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ipv6->destipaddr[3], ipv6->destipaddr[4], ipv6->destipaddr[5],
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ipv6->destipaddr[6], ipv6->destipaddr[7]);
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MLD_STATINCR(g_netstats.mld.v1report_received);
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/* Find the group (or create a new one) using the incoming IP address */
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group = mld_grpallocfind(dev, ipv6->destipaddr);
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if (group == NULL)
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{
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nerr("ERROR: Failed to allocate/find group\n");
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return -ENOENT;
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}
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if (!IS_MLD_IDLEMEMBER(group->flags))
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{
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/* This is on a specific group we have already looked up */
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wd_cancel(group->wdog);
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SET_MLD_IDLEMEMBER(group->flags);
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CLR_MLD_LASTREPORT(group->flags);
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}
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return OK;
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}
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/****************************************************************************
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* Name: mld_report_v2
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*
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* Description:
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* Called from icmpv6_input() when a Version 2 Multicast Listener Report is
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* received.
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*
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****************************************************************************/
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int mld_report_v2(FAR struct net_driver_s *dev,
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FAR const struct mld_mcast_listen_report_v2_s *report)
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{
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FAR struct ipv6_hdr_s *ipv6 = IPv6BUF;
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FAR struct mld_group_s *group;
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ninfo("Version 2 Multicast Listener Report\n");
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ninfo("destipaddr: %04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x\n",
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ipv6->destipaddr[0], ipv6->destipaddr[1], ipv6->destipaddr[2],
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ipv6->destipaddr[3], ipv6->destipaddr[4], ipv6->destipaddr[5],
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ipv6->destipaddr[6], ipv6->destipaddr[7]);
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MLD_STATINCR(g_netstats.mld.v2report_received);
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/* Find the group (or create a new one) using the incoming IP address */
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group = mld_grpallocfind(dev, ipv6->destipaddr);
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if (group == NULL)
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{
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nerr("ERROR: Failed to allocate/find group\n");
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return -ENOENT;
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}
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if (!IS_MLD_IDLEMEMBER(group->flags))
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{
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/* This is on a specific group we have already looked up */
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wd_cancel(group->wdog);
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SET_MLD_IDLEMEMBER(group->flags);
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CLR_MLD_LASTREPORT(group->flags);
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}
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return OK;
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}
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