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[/] [openrisc/] [trunk/] [rtos/] [freertos-6.1.1/] [Demo/] [Common/] [ethernet/] [lwIP_132/] [src/] [include/] [ipv4/] [lwip/] [igmp.h] - Blame information for rev 606

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Line No. Rev Author Line
1 606 jeremybenn
/*
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 * Copyright (c) 2002 CITEL Technologies Ltd.
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 * All rights reserved.
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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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 * 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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 * This file is a contribution to the lwIP TCP/IP stack.
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 * The Swedish Institute of Computer Science and Adam Dunkels
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 * are specifically granted permission to redistribute this
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 * source code.
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*/
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#ifndef __LWIP_IGMP_H__
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#define __LWIP_IGMP_H__
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#include "lwip/opt.h"
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#include "lwip/ip_addr.h"
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#include "lwip/netif.h"
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#include "lwip/pbuf.h"
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#if LWIP_IGMP /* don't build if not configured for use in lwipopts.h */
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#ifdef __cplusplus
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extern "C" {
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#endif
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/*
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 * IGMP constants
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 */
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#define IP_PROTO_IGMP                  2
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#define IGMP_TTL                       1
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#define IGMP_MINLEN                    8
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#define ROUTER_ALERT                   0x9404
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#define ROUTER_ALERTLEN                4
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/*
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 * IGMP message types, including version number.
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 */
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#define IGMP_MEMB_QUERY                0x11 /* Membership query         */
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#define IGMP_V1_MEMB_REPORT            0x12 /* Ver. 1 membership report */
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#define IGMP_V2_MEMB_REPORT            0x16 /* Ver. 2 membership report */
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#define IGMP_LEAVE_GROUP               0x17 /* Leave-group message      */
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/* IGMP timer */
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#define IGMP_TMR_INTERVAL              100 /* Milliseconds */
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#define IGMP_V1_DELAYING_MEMBER_TMR   (1000/IGMP_TMR_INTERVAL)
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#define IGMP_JOIN_DELAYING_MEMBER_TMR (500 /IGMP_TMR_INTERVAL)
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/* MAC Filter Actions */
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#define IGMP_DEL_MAC_FILTER            0
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#define IGMP_ADD_MAC_FILTER            1
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/* Group  membership states */
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#define IGMP_GROUP_NON_MEMBER          0
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#define IGMP_GROUP_DELAYING_MEMBER     1
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#define IGMP_GROUP_IDLE_MEMBER         2
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/*
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 * IGMP packet format.
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 */
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#ifdef PACK_STRUCT_USE_INCLUDES
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#  include "arch/bpstruct.h"
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#endif
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PACK_STRUCT_BEGIN
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struct igmp_msg {
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 PACK_STRUCT_FIELD(u8_t           igmp_msgtype);
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 PACK_STRUCT_FIELD(u8_t           igmp_maxresp);
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 PACK_STRUCT_FIELD(u16_t          igmp_checksum);
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 PACK_STRUCT_FIELD(struct ip_addr igmp_group_address);
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} PACK_STRUCT_STRUCT;
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PACK_STRUCT_END
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#ifdef PACK_STRUCT_USE_INCLUDES
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#  include "arch/epstruct.h"
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#endif
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/*
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 * now a group structure - there is
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 * a list of groups for each interface
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 * these should really be linked from the interface, but
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 * if we keep them separate we will not affect the lwip original code
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 * too much
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 *
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 * There will be a group for the all systems group address but this
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 * will not run the state machine as it is used to kick off reports
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 * from all the other groups
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 */
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struct igmp_group {
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  struct igmp_group *next;
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  struct netif      *interface;
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  struct ip_addr     group_address;
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  u8_t               last_reporter_flag; /* signifies we were the last person to report */
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  u8_t               group_state;
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  u16_t              timer;
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  u8_t               use; /* counter of simultaneous uses */
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};
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/*  Prototypes */
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void   igmp_init(void);
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err_t  igmp_start( struct netif *netif);
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err_t  igmp_stop( struct netif *netif);
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void   igmp_report_groups( struct netif *netif);
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struct igmp_group *igmp_lookfor_group( struct netif *ifp, struct ip_addr *addr);
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struct igmp_group *igmp_lookup_group( struct netif *ifp, struct ip_addr *addr);
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err_t  igmp_remove_group( struct igmp_group *group);
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void   igmp_input( struct pbuf *p, struct netif *inp, struct ip_addr *dest);
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err_t  igmp_joingroup( struct ip_addr *ifaddr, struct ip_addr *groupaddr);
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err_t  igmp_leavegroup( struct ip_addr *ifaddr, struct ip_addr *groupaddr);
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void   igmp_tmr(void);
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void   igmp_timeout( struct igmp_group *group);
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void   igmp_start_timer( struct igmp_group *group, u8_t max_time);
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void   igmp_stop_timer( struct igmp_group *group);
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void   igmp_delaying_member( struct igmp_group *group, u8_t maxresp);
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err_t  igmp_ip_output_if( struct pbuf *p, struct ip_addr *src, struct ip_addr *dest, u8_t ttl, u8_t proto, struct netif *netif);
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void   igmp_send( struct igmp_group *group, u8_t type);
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#ifdef __cplusplus
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}
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#endif
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#endif /* LWIP_IGMP */
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#endif /* __LWIP_IGMP_H__ */

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