159 lines
4.7 KiB
C

/*
* Copyright (c) 2002 CITEL Technologies Ltd.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of CITEL Technologies Ltd nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY CITEL TECHNOLOGIES AND CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL CITEL TECHNOLOGIES OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* This file is a contribution to the lwIP TCP/IP stack.
* The Swedish Institute of Computer Science and Adam Dunkels
* are specifically granted permission to redistribute this
* source code.
*/
#ifndef IGMPH
#define IGMPH
#include "lwip/opt.h"
/* IGMP support available? */
#if defined(LWIP_IGMP) && (LWIP_IGMP > 0)
#ifdef __cplusplus
extern "C" {
#endif
/* Some routers are not happy with ROUTER ALERT make it defineable, 1 to enable */
#define USE_ROUTER_ALERT 0
/*
* IGMP packet format.
*/
struct igmpmsg {
u8_t igmp_msgtype;
u8_t igmp_maxresp;
u16_t igmp_checksum;
struct ip_addr igmp_group_address;
};
#define MCAST224 224
#define ALLROUTERS_GROUP 224,0,0,2
#define IGMP_MINLEN 8
/*
* Message types, including version number.
*/
#define IGMP_MEMB_QUERY 0x11 /* Membership query */
#define IGMP_V1_MEMB_REPORT 0x12 /* Ver. 1 membership report */
#define IGMP_V2_MEMB_REPORT 0x16 /* Ver. 2 membership report */
#define IGMP_LEAVE_GROUP 0x17 /* Leave-group message */
/* Timer */
#define IGMP_TMR_INTERVAL 100 /* Milliseconds */
/* MAC Filter Actions */
#define IGMP_DEL_MAC_FILTER 0
#define IGMP_ADD_MAC_FILTER 1
/* Group membership states */
#define NON_MEMBER 0
#define DELAYING_MEMBER 1
#define IDLE_MEMBER 2
/* Put this is another place when integrated */
#define IP_PROTO_IGMP 2
#define IGMP_TTL 1
#define ROUTER_ALERTLEN 4
/*
* now a group structure - there is
* a list of groups for each interface
* these should really be linked from the interface, but
* if we keep them separate we will not affect the lwip original code
* too much
*
* There will be a group for the all systems group address but this
* will not run the state machine as it is used to kick off reports
* from all the other groups
*/
struct igmp_group {
struct igmp_group *next;
struct netif *interface;
struct ip_addr group_address;
u8_t last_reporter_flag; /* signifies we were the last person to report */
u8_t group_state;
u16_t timer;
};
struct igmp_stats{
u32_t igmp_length_err;
u32_t igmp_checksum_err;
u32_t igmp_v1_rxed;
u32_t igmp_joins;
u32_t igmp_leave_sent;
u32_t igmp_unicast_query;
u32_t report_sent;
u32_t igmp_group_query_rxed;
u32_t report_rxed;
};
/* Prototypes */
void igmp_init(void);
struct igmp_group *lookfor_group(struct netif *ifp, struct ip_addr *addr);
struct igmp_group *lookup_group(struct netif *ifp, struct ip_addr *addr);
void igmp_input( struct pbuf *p, struct netif *inp, struct ip_addr *dest);
err_t igmp_joingroup( struct netif* ifp, struct ip_addr *groupaddr);
err_t igmp_leavegroup( struct netif* ifp, struct ip_addr *groupaddr);
void igmp_tmr();
void igmp_timeout( struct igmp_group *group);
void igmp_start_timer( struct igmp_group *group,u8_t max_time);
void igmp_stop_timer( struct igmp_group *group);
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);
void igmp_send( struct igmp_group *group, u8_t type);
#ifdef __cplusplus
}
#endif
#endif /* LWIP_IGMP */
#endif /* IGMPH */