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