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Diffstat (limited to 'core/lwip/src/include/ipv4/lwip/igmp.h')
| -rw-r--r-- | core/lwip/src/include/ipv4/lwip/igmp.h | 106 |
1 files changed, 106 insertions, 0 deletions
diff --git a/core/lwip/src/include/ipv4/lwip/igmp.h b/core/lwip/src/include/ipv4/lwip/igmp.h new file mode 100644 index 0000000..8aabac2 --- /dev/null +++ b/core/lwip/src/include/ipv4/lwip/igmp.h @@ -0,0 +1,106 @@ +/* + * 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 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, these are passed to a netif's + * igmp_mac_filter callback function. */ +#define IGMP_DEL_MAC_FILTER 0 +#define IGMP_ADD_MAC_FILTER 1 + + +/** + * igmp 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 { + /** next link */ + struct igmp_group *next; + /** interface on which the group is active */ + struct netif *netif; + /** multicast address */ + ip_addr_t group_address; + /** signifies we were the last person to report */ + u8_t last_reporter_flag; + /** current state of the group */ + u8_t group_state; + /** timer for reporting, negative is OFF */ + u16_t timer; + /** counter of simultaneous uses */ + u8_t use; +}; + +/* 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, ip_addr_t *addr); +void igmp_input(struct pbuf *p, struct netif *inp, ip_addr_t *dest); +err_t igmp_joingroup(ip_addr_t *ifaddr, ip_addr_t *groupaddr); +err_t igmp_leavegroup(ip_addr_t *ifaddr, ip_addr_t *groupaddr); +void igmp_tmr(void); + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_IGMP */ + +#endif /* __LWIP_IGMP_H__ */ |