171 lines
4.6 KiB
C
171 lines
4.6 KiB
C
/*
|
|
* BIRD -- Router Advertisement
|
|
*
|
|
*
|
|
* Can be freely distributed and used under the terms of the GNU GPL.
|
|
*/
|
|
|
|
#ifndef _BIRD_RADV_H_
|
|
#define _BIRD_RADV_H_
|
|
|
|
#include "nest/bird.h"
|
|
|
|
#include "lib/ip.h"
|
|
#include "lib/lists.h"
|
|
#include "lib/socket.h"
|
|
#include "lib/timer.h"
|
|
#include "lib/resource.h"
|
|
#include "nest/protocol.h"
|
|
#include "nest/iface.h"
|
|
#include "nest/route.h"
|
|
#include "nest/cli.h"
|
|
#include "nest/locks.h"
|
|
#include "conf/conf.h"
|
|
#include "lib/string.h"
|
|
|
|
|
|
#define ICMPV6_PROTO 58
|
|
|
|
#define ICMPV6_RS 133
|
|
#define ICMPV6_RA 134
|
|
|
|
#define MAX_INITIAL_RTR_ADVERTISEMENTS 3
|
|
#define MAX_INITIAL_RTR_ADVERT_INTERVAL 16
|
|
|
|
#define DEFAULT_MAX_RA_INT 600
|
|
#define DEFAULT_MIN_DELAY 3
|
|
#define DEFAULT_CURRENT_HOP_LIMIT 64
|
|
|
|
#define DEFAULT_VALID_LIFETIME 86400
|
|
#define DEFAULT_PREFERRED_LIFETIME 14400
|
|
|
|
#define DEFAULT_DNS_LIFETIME_MULT 3
|
|
|
|
|
|
struct radv_config
|
|
{
|
|
struct proto_config c;
|
|
list patt_list; /* List of iface configs (struct radv_iface_config) */
|
|
list pref_list; /* Global list of prefix configs (struct radv_prefix_config) */
|
|
list rdnss_list; /* Global list of RDNSS configs (struct radv_rdnss_config) */
|
|
list dnssl_list; /* Global list of DNSSL configs (struct radv_dnssl_config) */
|
|
|
|
ip_addr trigger_prefix; /* Prefix of a trigger route, if defined */
|
|
u8 trigger_pxlen; /* Pxlen of a trigger route, if defined */
|
|
u8 trigger_valid; /* Whether a trigger route is defined */
|
|
};
|
|
|
|
struct radv_iface_config
|
|
{
|
|
struct iface_patt i;
|
|
list pref_list; /* Local list of prefix configs (struct radv_prefix_config) */
|
|
list rdnss_list; /* Local list of RDNSS configs (struct radv_rdnss_config) */
|
|
list dnssl_list; /* Local list of DNSSL configs (struct radv_dnssl_config) */
|
|
|
|
u32 min_ra_int; /* Standard options from RFC 4261 */
|
|
u32 max_ra_int;
|
|
u32 min_delay;
|
|
|
|
u8 rdnss_local; /* Global list is not used for RDNSS */
|
|
u8 dnssl_local; /* Global list is not used for DNSSL */
|
|
|
|
u8 managed; /* Standard options from RFC 4261 */
|
|
u8 other_config;
|
|
u32 link_mtu;
|
|
u32 reachable_time;
|
|
u32 retrans_timer;
|
|
u32 current_hop_limit;
|
|
u32 default_lifetime;
|
|
u8 default_lifetime_sensitive; /* Whether default_lifetime depends on trigger */
|
|
u8 default_preference; /* Default Router Preference (RFC 4191) */
|
|
};
|
|
|
|
struct radv_prefix_config
|
|
{
|
|
node n;
|
|
ip_addr prefix;
|
|
int pxlen;
|
|
|
|
u8 skip; /* Do not include this prefix to RA */
|
|
u8 onlink; /* Standard options from RFC 4261 */
|
|
u8 autonomous;
|
|
u32 valid_lifetime;
|
|
u32 preferred_lifetime;
|
|
u8 valid_lifetime_sensitive; /* Whether valid_lifetime depends on trigger */
|
|
u8 preferred_lifetime_sensitive; /* Whether preferred_lifetime depends on trigger */
|
|
};
|
|
|
|
struct radv_rdnss_config
|
|
{
|
|
node n;
|
|
u32 lifetime; /* Valid if lifetime_mult is 0 */
|
|
u16 lifetime_mult; /* Lifetime specified as multiple of max_ra_int */
|
|
ip_addr server; /* IP address of recursive DNS server */
|
|
};
|
|
|
|
struct radv_dnssl_config
|
|
{
|
|
node n;
|
|
u32 lifetime; /* Valid if lifetime_mult is 0 */
|
|
u16 lifetime_mult; /* Lifetime specified as multiple of max_ra_int */
|
|
u8 dlen_first; /* Length of first label in domain */
|
|
u8 dlen_all; /* Both dlen_ filled in radv_process_domain() */
|
|
char *domain; /* Domain for DNS search list, in processed form */
|
|
};
|
|
|
|
|
|
struct proto_radv
|
|
{
|
|
struct proto p;
|
|
list iface_list; /* List of active ifaces */
|
|
u8 active; /* Whether radv is active w.r.t. triggers */
|
|
};
|
|
|
|
struct radv_iface
|
|
{
|
|
node n;
|
|
struct proto_radv *ra;
|
|
struct radv_iface_config *cf; /* Related config, must be updated in reconfigure */
|
|
struct iface *iface;
|
|
struct ifa *addr; /* Link-local address of iface */
|
|
|
|
timer *timer;
|
|
struct object_lock *lock;
|
|
sock *sk;
|
|
|
|
bird_clock_t last; /* Time of last sending of RA */
|
|
u16 plen; /* Length of prepared RA in tbuf, or 0 if not valid */
|
|
byte initial; /* List of active ifaces */
|
|
};
|
|
|
|
#define RA_EV_INIT 1 /* Switch to initial mode */
|
|
#define RA_EV_CHANGE 2 /* Change of options or prefixes */
|
|
#define RA_EV_RS 3 /* Received RS */
|
|
|
|
/* Default Router Preferences (RFC 4191) */
|
|
#define RA_PREF_LOW 0x18
|
|
#define RA_PREF_MEDIUM 0x00
|
|
#define RA_PREF_HIGH 0x08
|
|
#define RA_PREF_MASK 0x18
|
|
|
|
|
|
#ifdef LOCAL_DEBUG
|
|
#define RADV_FORCE_DEBUG 1
|
|
#else
|
|
#define RADV_FORCE_DEBUG 0
|
|
#endif
|
|
#define RADV_TRACE(flags, msg, args...) do { if ((ra->p.debug & flags) || RADV_FORCE_DEBUG) \
|
|
log(L_TRACE "%s: " msg, ra->p.name , ## args ); } while(0)
|
|
|
|
|
|
/* radv.c */
|
|
void radv_iface_notify(struct radv_iface *ifa, int event);
|
|
|
|
/* packets.c */
|
|
int radv_process_domain(struct radv_dnssl_config *cf);
|
|
void radv_send_ra(struct radv_iface *ifa, int shutdown);
|
|
int radv_sk_open(struct radv_iface *ifa);
|
|
|
|
|
|
|
|
#endif /* _BIRD_RADV_H_ */
|