1 /** 2 * @file 3 * 4 * Multicast listener discovery for IPv6. Aims to be compliant with RFC 2710. 5 * No support for MLDv2. 6 */ 7 8 /* 9 * Copyright (c) 2010 Inico Technologies Ltd. 10 * All rights reserved. 11 * 12 * Redistribution and use in source and binary forms, with or without modification, 13 * are permitted provided that the following conditions are met: 14 * 15 * 1. Redistributions of source code must retain the above copyright notice, 16 * this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright notice, 18 * this list of conditions and the following disclaimer in the documentation 19 * and/or other materials provided with the distribution. 20 * 3. The name of the author may not be used to endorse or promote products 21 * derived from this software without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 24 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 25 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 26 * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 27 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 28 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 29 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 30 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 31 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 32 * OF SUCH DAMAGE. 33 * 34 * This file is part of the lwIP TCP/IP stack. 35 * 36 * Author: Ivan Delamer <delamer@inicotech.com> 37 * 38 * 39 * Please coordinate changes and requests with Ivan Delamer 40 * <delamer@inicotech.com> 41 */ 42 43 #ifndef LWIP_HDR_MLD6_H 44 #define LWIP_HDR_MLD6_H 45 46 #include "lwip/opt.h" 47 48 #if LWIP_IPV6_MLD && LWIP_IPV6 /* don't build if not configured for use in lwipopts.h */ 49 50 #include "lwip/pbuf.h" 51 #include "lwip/netif.h" 52 53 #ifdef __cplusplus 54 extern "C" { 55 #endif 56 57 /** MLD group */ 58 struct mld_group { 59 /** next link */ 60 struct mld_group *next; 61 /** multicast address */ 62 ip6_addr_t group_address; 63 /** signifies we were the last person to report */ 64 u8_t last_reporter_flag; 65 /** current state of the group */ 66 u8_t group_state; 67 /** timer for reporting */ 68 u16_t timer; 69 /** counter of simultaneous uses */ 70 u8_t use; 71 }; 72 73 #define MLD6_TMR_INTERVAL 100 /* Milliseconds */ 74 75 err_t mld6_stop(struct netif *netif); 76 void mld6_report_groups(struct netif *netif); 77 void mld6_tmr(void); 78 struct mld_group *mld6_lookfor_group(struct netif *ifp, const ip6_addr_t *addr); 79 void mld6_input(struct pbuf *p, struct netif *inp); 80 err_t mld6_joingroup(const ip6_addr_t *srcaddr, const ip6_addr_t *groupaddr); 81 err_t mld6_joingroup_netif(struct netif *netif, const ip6_addr_t *groupaddr); 82 err_t mld6_leavegroup(const ip6_addr_t *srcaddr, const ip6_addr_t *groupaddr); 83 err_t mld6_leavegroup_netif(struct netif *netif, const ip6_addr_t *groupaddr); 84 85 /** @ingroup mld6 86 * Get list head of MLD6 groups for netif. 87 * Note: The allnodes group IP is NOT in the list, since it must always 88 * be received for correct IPv6 operation. 89 * @see @ref netif_set_mld_mac_filter() 90 */ 91 #define netif_mld6_data(netif) ((struct mld_group *)netif_get_client_data(netif, LWIP_NETIF_CLIENT_DATA_INDEX_MLD6)) 92 93 #ifdef __cplusplus 94 } 95 #endif 96 97 #endif /* LWIP_IPV6_MLD && LWIP_IPV6 */ 98 99 #endif /* LWIP_HDR_MLD6_H */ 100