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/* $OpenBSD: igmp.h,v 1.2 2009/03/06 18:39:13 michele Exp $ */
/*
* Copyright (c) 2005, 2006 Esben Norby <norby@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/* IGMP protocol definitions */
#ifndef _IGMP_H_
#define _IGMP_H_
/* misc */
#define AllSystems "224.0.0.1"
#define AllRouters "224.0.0.2"
#define AllIGMPv3Routers "224.0.0.22"
#define DEFAULT_ROBUSTNESS 2
#define MIN_ROBUSTNESS 1
#define MAX_ROBUSTNESS 4
#define DEFAULT_QUERY_INTERVAL 125
#define MIN_QUERY_INTERVAL 1
#define MAX_QUERY_INTERVAL 65535
/* must be less than QUERY_INTERVAL */
#define DEFAULT_QUERY_RESP_INTERVAL 100 /* 10 seconds */
#define MIN_QUERY_RESP_INTERVAL 1
#define MAX_QUERY_RESP_INTERVAL 65535
#define DEFAULT_STARTUP_QUERY_INTERVAL DEFAULT_QUERY_INTERVAL / 4
#define MIN_STARTUP_QUERY_INTERVAL MIN_QUERY_INTERVAL
#define MAX_STARTUP_QUERY_INTERVAL MAX_QUERY_INTERVAL
#define DEFAULT_STARTUP_QUERY_CNT DEFAULT_ROBUSTNESS
#define MIN_STARTUP_QUERY_CNT MIN_ROBUSTNESS /* XXX */
#define MAX_STARTUP_QUERY_CNT MAX_ROBUSTNESS /* XXX */
#define DEFAULT_LAST_MEMBER_QUERY_INTERVAL 10 /* 1 second */
#define MIN_LAST_MEMBER_QUERY_INTERVAL 1
#define MAX_LAST_MEMBER_QUERY_INTERVAL 65535
#define DEFAULT_LAST_MEMBER_QUERY_CNT DEFAULT_ROBUSTNESS
#define MIN_LAST_MEMBER_QUERY_CNT 1
#define MAX_LAST_MEMBER_QUERY_CNT 255
/* IGMP packet types */
#define PKT_TYPE_MEMBER_QUERY 0x11
#define PKT_TYPE_MEMBER_REPORTv1 0x12
#define PKT_TYPE_MEMBER_REPORTv2 0x16
#define PKT_TYPE_LEAVE_GROUPv2 0x17
#define PKT_TYPE_MEMBER_REPORTv3 0x22
#define DEFAULT_IGMP_VERSION 2
#define MIN_IGMP_VERSION 1
#define MAX_IGMP_VERSION 2
/* IGMP header */
struct igmp_hdr {
u_int8_t type;
u_int8_t max_resp_time;
u_int16_t chksum;
u_int32_t grp_addr;
};
/* group states */
#define GRP_STA_NO_MEMB_PRSNT 0x01
#define GRP_STA_MEMB_PRSNT 0x02
#define GRP_STA_V1_MEMB_PRSNT 0x04
#define GRP_STA_CHECK_MEMB 0x08
#define GRP_STA_ANY 0x0e
/* group events */
enum group_event {
GRP_EVT_V2_REPORT_RCVD,
GRP_EVT_V1_REPORT_RCVD,
GRP_EVT_LEAVE_RCVD,
GRP_EVT_TMR_EXPIRED,
GRP_EVT_RETRANS_TMR_EXP,
GRP_EVT_V1_HOST_TMR_EXP,
GRP_EVT_REPORT_RCVD,
GRP_EVT_QUERY_RCVD,
GRP_EVT_NOTHING
};
/* group actions */
enum group_action {
GRP_ACT_END,
GRP_ACT_START_TMR,
GRP_ACT_START_TMR_ALL,
GRP_ACT_START_RETRANS_TMR,
GRP_ACT_START_V1_HOST_TMR,
GRP_ACT_SEND_GRP_QUERY,
GRP_ACT_ADD_GROUP,
GRP_ACT_DEL_GROUP,
GRP_ACT_CLR_RETRANS_TMR,
GRP_ACT_NOTHING
};
#endif /* _IGMP_H_ */
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