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/**
* Copyright (C) 2012-2013 Steven Barth <steven@midlink.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License v2 as published by
* the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
*/
#ifndef _ROUTER_H_
#define _ROUTER_H_
#include <stdint.h>
#include <netinet/in.h>
#include <netinet/icmp6.h>
struct icmpv6_opt {
uint8_t type;
uint8_t len;
uint8_t data[6];
};
#define icmpv6_for_each_option(opt, start, end)\
for (opt = (struct icmpv6_opt*)(start);\
(void*)(opt + 1) <= (void*)(end) && opt->len > 0 &&\
(void*)(opt + opt->len) <= (void*)(end); opt += opt->len)
#define MaxInitialRtrAdvInterval 16
#define MaxInitialRtAdvs 3
/* RFC8319 §4
* This document updates §4.2 and 6.2.1 of [RFC4861] to change
* the following router configuration variables.
*
* In §6.2.1, inside the paragraph that defines
* MaxRtrAdvInterval, change 1800 to 65535 seconds.
*
* In §6.2.1, inside the paragraph that defines
* AdvDefaultLifetime, change 9000 to 65535 seconds.
*/
#define MaxRtrAdvInterval 65535
#define MinRtrAdvInterval 3
#define AdvDefaultLifetime 65535
/* RFC8319 §4
* This document updates §4.2 and 6.2.1 of [RFC4861] to change
* the following router configuration variables.
*
* In §4.2, inside the paragraph that defines Router Lifetime,
* change 9000 to 65535 seconds.
*
* Note: this is 16 bit Router Lifetime field in RA packets
*/
/* RFC9096 defines recommended option lifetimes configuration values
* ND_PREFERRED_LIMIT 2700
* ND_VALID_LIMIT 5400
*
* RFC9096 §3.4
* CE routers SHOULD set the "Router Lifetime" of Router Advertisement
* (RA) messages to ND_PREFERRED_LIMIT.
*
* Note: while the RFC recommends SHOULD of ND_PREFERRED_LIMIT, this
* define is used to cap values to a sane ceiling, i.e. ND_VALID_LIMIT.
*/
#define RouterLifetime 5400
/* RFC4861 §6.2.1 : AdvReachableTime :
* MUST be no greater than 3,600,000 msec
*/
#define AdvReachableTime 3600000
/* RFC4861 §6.2.1 : AdvCurHopLimit
* The value should be set to the current
* diameter of the Internet. The value zero means
* unspecified (by this router).
*
* Note: this value is an 8 bit int, so max 255.
*/
#define AdvCurHopLimit 255
/* RFC4861 §10 - constants
* Node constants:
* RETRANS_TIMER 1,000 milliseconds
*/
#define RETRANS_TIMER_MAX 60000
/* RFC2460 §5
* IPv6 requires that every link in the internet have an MTU of 1280
* octets or greater.
*/
#define RA_MTU_MIN 1280
#define RA_MTU_MAX 65535
#define ND_RA_FLAG_PROXY 0x4
#define ND_RA_PREF_HIGH (1 << 3)
#define ND_RA_PREF_LOW (3 << 3)
/* RFC9762 DHCPv6 PD Availability - Preferred Flag
* use this until it is defined in netinet/icmp6.h
*/
#define ND_OPT_PI_FLAG_PD_PREFERRED 0x10
#endif /* _ROUTER_H_ */
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