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Add igmp.h and igmp.c inside tree :
src/core/ipv4/igmp.c src/include/ipv4/lwip/igmp.h
This commit is contained in:
fbernon
148
src/include/ipv4/lwip/igmp.h
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148
src/include/ipv4/lwip/igmp.h
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/*
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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 IGMPH
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#define IGMPH
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/* IGMP support available? */
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#if defined(LWIP_IGMP) && (LWIP_IGMP > 0)
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// Some routers are not happy with ROUTER ALERT make it defineable, 1 to enable
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#define USE_ROUTER_ALERT 0
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/*
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* IGMP packet format.
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*/
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struct igmpmsg {
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u8_t igmp_msgtype;
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u8_t igmp_maxresp;
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u16_t igmp_checksum;
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struct ip_addr igmp_group_address;
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};
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#define MCAST224 224
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#define ALLROUTERS_GROUP 224,0,0,2
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#define IGMP_MINLEN 8
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/*
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* 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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// Timer
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#define IGMP_TICK 100 // Milliseconds
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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 NON_MEMBER 0
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#define DELAYING_MEMBER 1
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#define IDLE_MEMBER 2
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// Put this is another place when integrated
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#define IP_PROTO_IGMP 2
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#define IGMP_TTL 1
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#define ROUTER_ALERTLEN 4
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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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};
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struct igmp_stats{
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u32_t igmp_length_err;
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u32_t igmp_checksum_err;
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u32_t igmp_v1_rxed;
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u32_t igmp_joins;
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u32_t igmp_leave_sent;
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u32_t igmp_unicast_query;
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u32_t report_sent;
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u32_t igmp_group_query_rxed;
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u32_t report_rxed;
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};
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// Prototypes
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void igmp_init(void);
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struct igmp_group *lookfor_group(struct netif *ifp, struct ip_addr *addr);
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struct igmp_group *lookup_group(struct netif *ifp, struct ip_addr *addr);
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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 netif* ifp, struct ip_addr *groupaddr);
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err_t igmp_leavegroup( struct netif* ifp, struct ip_addr *groupaddr);
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void igmp_tick();
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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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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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#endif /* LWIP_IGMP */
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#endif /* IGMPH */
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