[164] | 1 | /*
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| 2 | * Copyright (c) 2002 CITEL Technologies Ltd.
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| 3 | * All rights reserved.
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| 4 | *
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| 5 | * Redistribution and use in source and binary forms, with or without
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| 6 | * modification, are permitted provided that the following conditions
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| 7 | * are met:
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| 8 | * 1. Redistributions of source code must retain the above copyright
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| 9 | * notice, this list of conditions and the following disclaimer.
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| 10 | * 2. Redistributions in binary form must reproduce the above copyright
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| 11 | * notice, this list of conditions and the following disclaimer in the
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| 12 | * documentation and/or other materials provided with the distribution.
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| 13 | * 3. Neither the name of CITEL Technologies Ltd nor the names of its contributors
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| 14 | * may be used to endorse or promote products derived from this software
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| 15 | * without specific prior written permission.
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| 16 | *
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| 17 | * THIS SOFTWARE IS PROVIDED BY CITEL TECHNOLOGIES AND CONTRIBUTORS ``AS IS''
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| 18 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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| 19 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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| 20 | * ARE DISCLAIMED. IN NO EVENT SHALL CITEL TECHNOLOGIES OR CONTRIBUTORS BE LIABLE
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| 21 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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| 22 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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| 23 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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| 24 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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| 25 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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| 26 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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| 27 | * SUCH DAMAGE.
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| 28 | *
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| 29 | * This file is a contribution to the lwIP TCP/IP stack.
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| 30 | * The Swedish Institute of Computer Science and Adam Dunkels
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| 31 | * are specifically granted permission to redistribute this
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| 32 | * source code.
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| 33 | */
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| 34 |
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| 35 | #ifndef __LWIP_IGMP_H__
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| 36 | #define __LWIP_IGMP_H__
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| 37 |
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| 38 | #include "lwip/opt.h"
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| 39 | #include "lwip/ip_addr.h"
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| 40 | #include "lwip/netif.h"
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| 41 | #include "lwip/pbuf.h"
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| 42 |
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| 43 | #if LWIP_IGMP /* don't build if not configured for use in lwipopts.h */
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| 44 |
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| 45 | #ifdef __cplusplus
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| 46 | extern "C" {
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| 47 | #endif
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| 48 |
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| 49 |
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| 50 | /* IGMP timer */
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| 51 | #define IGMP_TMR_INTERVAL 100 /* Milliseconds */
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| 52 | #define IGMP_V1_DELAYING_MEMBER_TMR (1000/IGMP_TMR_INTERVAL)
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| 53 | #define IGMP_JOIN_DELAYING_MEMBER_TMR (500 /IGMP_TMR_INTERVAL)
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| 54 |
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| 55 | /* MAC Filter Actions, these are passed to a netif's
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| 56 | * igmp_mac_filter callback function. */
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| 57 | #define IGMP_DEL_MAC_FILTER 0
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| 58 | #define IGMP_ADD_MAC_FILTER 1
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| 59 |
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| 60 |
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| 61 | /**
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| 62 | * igmp group structure - there is
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| 63 | * a list of groups for each interface
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| 64 | * these should really be linked from the interface, but
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| 65 | * if we keep them separate we will not affect the lwip original code
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| 66 | * too much
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| 67 | *
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| 68 | * There will be a group for the all systems group address but this
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| 69 | * will not run the state machine as it is used to kick off reports
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| 70 | * from all the other groups
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| 71 | */
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| 72 | struct igmp_group {
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| 73 | /** next link */
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| 74 | struct igmp_group *next;
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| 75 | /** interface on which the group is active */
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| 76 | struct netif *netif;
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| 77 | /** multicast address */
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| 78 | ip_addr_t group_address;
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| 79 | /** signifies we were the last person to report */
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| 80 | u8_t last_reporter_flag;
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| 81 | /** current state of the group */
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| 82 | u8_t group_state;
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| 83 | /** timer for reporting, negative is OFF */
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| 84 | u16_t timer;
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| 85 | /** counter of simultaneous uses */
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| 86 | u8_t use;
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| 87 | };
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| 88 |
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| 89 | /* Prototypes */
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| 90 | void igmp_init(void);
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| 91 | err_t igmp_start(struct netif *netif);
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| 92 | err_t igmp_stop(struct netif *netif);
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| 93 | void igmp_report_groups(struct netif *netif);
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| 94 | struct igmp_group *igmp_lookfor_group(struct netif *ifp, ip_addr_t *addr);
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| 95 | void igmp_input(struct pbuf *p, struct netif *inp, ip_addr_t *dest);
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| 96 | err_t igmp_joingroup(ip_addr_t *ifaddr, ip_addr_t *groupaddr);
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| 97 | err_t igmp_leavegroup(ip_addr_t *ifaddr, ip_addr_t *groupaddr);
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| 98 | void igmp_tmr(void);
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| 99 |
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| 100 | #ifdef __cplusplus
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| 101 | }
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| 102 | #endif
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| 103 |
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| 104 | #endif /* LWIP_IGMP */
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| 105 |
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| 106 | #endif /* __LWIP_IGMP_H__ */
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