Pehr Hovey / Mbed 2 deprecated UDPtest

Some quick code to use UDP-only (no TCP) with mBed. Echos received packets and sends packets when a button is pressed

Dependencies:   mbed

Core/lwIP/include/ipv4/lwip/igmp.h@0:a548a085de55, 2010-03-14 (annotated)

Committer:
pehrhovey
Date:
Sun Mar 14 00:54:12 2010 +0000
Revision:
0:a548a085de55

        

        
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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 __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__ */