Internet on FIRE

/*

 *        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 "sysdep/unix/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) */

  net_addr trigger;                /* Prefix of a trigger route, if 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;

  net_addr_ip6 prefix;

  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 */

  ip6_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_ */