| /* |
| * 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 __LWIP_IGMP_H__ |
| #define __LWIP_IGMP_H__ |
| |
| #include "lwip/opt.h" |
| #include "lwip/ip_addr.h" |
| #include "lwip/netif.h" |
| #include "lwip/pbuf.h" |
| |
| #if LWIP_IGMP /* don't build if not configured for use in lwipopts.h */ |
| |
| #ifdef __cplusplus |
| extern "C" { |
| #endif |
| |
| /* |
| * IGMP constants |
| */ |
| #define IP_PROTO_IGMP 2 |
| #define IGMP_TTL 1 |
| #define IGMP_MINLEN 8 |
| #define ROUTER_ALERT 0x9404 |
| #define ROUTER_ALERTLEN 4 |
| |
| /* |
| * IGMP 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 */ |
| |
| /* IGMP timer */ |
| #define IGMP_TMR_INTERVAL 100 /* Milliseconds */ |
| #define IGMP_V1_DELAYING_MEMBER_TMR (1000/IGMP_TMR_INTERVAL) |
| #define IGMP_JOIN_DELAYING_MEMBER_TMR (500 /IGMP_TMR_INTERVAL) |
| |
| /* MAC Filter Actions */ |
| #define IGMP_DEL_MAC_FILTER 0 |
| #define IGMP_ADD_MAC_FILTER 1 |
| |
| /* Group membership states */ |
| #define IGMP_GROUP_NON_MEMBER 0 |
| #define IGMP_GROUP_DELAYING_MEMBER 1 |
| #define IGMP_GROUP_IDLE_MEMBER 2 |
| |
| /* |
| * IGMP packet format. |
| */ |
| #ifdef PACK_STRUCT_USE_INCLUDES |
| # include "arch/bpstruct.h" |
| #endif |
| PACK_STRUCT_BEGIN |
| struct igmp_msg { |
| PACK_STRUCT_FIELD(u8_t igmp_msgtype); |
| PACK_STRUCT_FIELD(u8_t igmp_maxresp); |
| PACK_STRUCT_FIELD(u16_t igmp_checksum); |
| PACK_STRUCT_FIELD(struct ip_addr igmp_group_address); |
| } PACK_STRUCT_STRUCT; |
| PACK_STRUCT_END |
| #ifdef PACK_STRUCT_USE_INCLUDES |
| # include "arch/epstruct.h" |
| #endif |
| |
| /* |
| * 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; |
| u8_t use; /* counter of simultaneous uses */ |
| }; |
| |
| |
| /* Prototypes */ |
| void igmp_init(void); |
| |
| err_t igmp_start( struct netif *netif); |
| |
| err_t igmp_stop( struct netif *netif); |
| |
| void igmp_report_groups( struct netif *netif); |
| |
| struct igmp_group *igmp_lookfor_group( struct netif *ifp, struct ip_addr *addr); |
| |
| struct igmp_group *igmp_lookup_group( struct netif *ifp, struct ip_addr *addr); |
| |
| err_t igmp_remove_group( struct igmp_group *group); |
| |
| void igmp_input( struct pbuf *p, struct netif *inp, struct ip_addr *dest); |
| |
| err_t igmp_joingroup( struct ip_addr *ifaddr, struct ip_addr *groupaddr); |
| |
| err_t igmp_leavegroup( struct ip_addr *ifaddr, struct ip_addr *groupaddr); |
| |
| void igmp_tmr(void); |
| |
| 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); |
| |
| void igmp_delaying_member( struct igmp_group *group, u8_t maxresp); |
| |
| 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 /* __LWIP_IGMP_H__ */ |