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/* $OpenBSD: dvmrp.h,v 1.3 2009/03/14 15:32:55 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.
*/
/* DVMRP protocol definitions */
#ifndef _DVMRP_H_
#define _DVMRP_H_
/* misc */
#define IPPROTO_DVMRP 2
#define AllDVMRPRouters "224.0.0.4"
#define DEFAULT_PROBE_INTERVAL 10
#define NBR_TMOUT 35
#define MIN_FLASH_UPDATE_INTERVAL 5
#define ROUTE_REPORT_INTERVAL 60
#define ROUTE_EXPIRATION_TIME 140
#define ROUTE_HOLD_DOWN 2 * ROUTE_REPORT_INTERVAL
#define MAX_PRUNE_LIFETIME 2 * 3600 /* 2 hours */
#define PRUNE_RETRANS_TIME 3 /* with exp. back off */
#define GRAFT_RETRANS_TIME 5 /* with exp. back off */
#define DEFAULT_CACHE_LIFETIME 300
#define DEFAULT_METRIC 1
#define MIN_METRIC 1
#define MAX_METRIC 31
#define INFINITY_METRIC 31
#define LAST_MASK 0x80 /* route reports */
#define METRIC_MASK ~LAST_MASK /* route reports */
#define DVMRP_MAJOR_VERSION 3
#define DVMRP_MINOR_VERSION 255
/* DVMRP packet types */
#define PKT_TYPE_DVMRP 0x13
#define DVMRP_CODE_PROBE 0x01
#define DVMRP_CODE_REPORT 0x02
#define DVMRP_CODE_ASK_NBRS 0x03 /* obsolete */
#define DVMRP_CODE_NBRS 0x04 /* obsolete */
#define DVMRP_CODE_ASK_NBRS2 0x05
#define DVMRP_CODE_NBRS2 0x06
#define DVMRP_CODE_PRUNE 0x07
#define DVMRP_CODE_GRAFT 0x08
#define DVMRP_CODE_GRAFT_ACK 0x09
/* DVMRP command types */
#define DVMRP_CMD_NULL 0
#define DVMRP_CMD_AF_INDICATOR 2
#define DVMRP_CMD_SUBNETMASK 3
#define DVMRP_CMD_METRIC 4
#define DVMRP_CMD_FLAGS0 5
#define DVMRP_CMD_INFINITY 6
#define DVMRP_CMD_DEST_ADDR 7
#define DVMRP_CMD_REQ_DEST_ADDR 8
#define DVMRP_CMD_NON_MEM_REPORT 9
#define DVMRP_CMD_NON_MEM_CANCEL 10
/* DVMRP capabilities */
#define DVMRP_CAP_LEAF 0x01
#define DVMRP_CAP_PRUNE 0x02
#define DVMRP_CAP_GENID 0x04
#define DVMRP_CAP_MTRACE 0x08
#define DVMRP_CAP_SNMP 0x10
#define DVMRP_CAP_NETMASK 0x20
#define DVMRP_CAP_DEFAULT (DVMRP_CAP_PRUNE | DVMRP_CAP_GENID | \
DVMRP_CAP_MTRACE)
/* DVMRP header */
struct dvmrp_hdr {
u_int8_t type;
u_int8_t code;
u_int16_t chksum;
u_int8_t dummy;
u_int8_t capabilities;
u_int8_t minor_version;
u_int8_t major_version;
};
/* Prune header */
struct prune_hdr {
u_int32_t src_host_addr;
u_int32_t group_addr;
u_int32_t lifetime;
u_int32_t src_netmask;
};
#define PRUNE_MIN_LEN 12
/* Graft and Graft Ack header */
struct graft_hdr {
u_int32_t src_host_addr;
u_int32_t group_addr;
u_int32_t src_netmask;
};
struct igmpmsg {
u_int32_t unused1;
u_int32_t unused2;
u_int8_t im_msgtype; /* what type of message */
#define IGMPMSG_NOCACHE 1 /* no MFC in the kernel */
#define IGMPMSG_WRONGVIF 2 /* packet came from wrong interface */
#define IGMPMSG_WHOLEPKT 3 /* PIM pkt for user level encap. */
#define IGMPMSG_BW_UPCALL 4 /* BW monitoring upcall */
u_int8_t im_mbz; /* must be zero */
u_int8_t im_vif; /* vif rec'd on */
u_int8_t unused3;
struct in_addr im_src, im_dst;
};
#endif /* !_DVMRP_H_ */
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