From: Maria Matejka <mq@ucw.cz>
Date: Wed, 13 Jul 2022 10:02:34 +0000 (+0200)
Subject: Merge commit '7e9cede1fd1878fb4c00e793bccd0ca6c18ad452' into thread-next
X-Git-Tag: v3.0-alpha1~171^2~19
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5be34f5ab4aa0c8852db6bf19cad5e81f46640e3;p=thirdparty%2Fbird.git

Merge commit '7e9cede1fd1878fb4c00e793bccd0ca6c18ad452' into thread-next
---

5be34f5ab4aa0c8852db6bf19cad5e81f46640e3
diff --cc conf/confbase.Y
index 58890cd67,5f45c5075..a603153c1
--- a/conf/confbase.Y
+++ b/conf/confbase.Y
@@@ -111,12 -110,12 +111,12 @@@ CF_DECL
  %type <i> expr bool pxlen4
  %type <time> expr_us time
  %type <a> ipa
- %type <net> net_ip4_ net_ip6_ net_ip6 net_ip_ net_ip net_or_ipa
+ %type <net> net_ip4_ net_ip4 net_ip6_ net_ip6 net_ip_ net_ip net_or_ipa
  %type <net_ptr> net_ net_any net_vpn4_ net_vpn6_ net_vpn_ net_roa4_ net_roa6_ net_roa_ net_ip6_sadr_ net_mpls_
 -%type <mls> label_stack_start label_stack
 +%type <ad> label_stack_start label_stack
  
  %type <t> text opttext
 -%type <s> symbol
 +%type <s> symbol symbol_known toksym 
  
  %nonassoc PREFIX_DUMMY
  %left AND OR
diff --cc nest/config.Y
index edddfc2b3,27e1682ba..f193a4fbd
--- a/nest/config.Y
+++ b/nest/config.Y
@@@ -118,14 -118,14 +118,14 @@@ CF_KEYWORDS(IPV4, IPV6, VPN4, VPN6, ROA
  CF_KEYWORDS(RECEIVE, LIMIT, ACTION, WARN, BLOCK, RESTART, DISABLE, KEEP, FILTERED, RPKI)
  CF_KEYWORDS(PASSWORD, KEY, FROM, PASSIVE, TO, ID, EVENTS, PACKETS, PROTOCOLS, CHANNELS, INTERFACES)
  CF_KEYWORDS(ALGORITHM, KEYED, HMAC, MD5, SHA1, SHA256, SHA384, SHA512, BLAKE2S128, BLAKE2S256, BLAKE2B256, BLAKE2B512)
 -CF_KEYWORDS(PRIMARY, STATS, COUNT, BY, FOR, IN, COMMANDS, PREEXPORT, NOEXPORT, EXPORTED, GENERATE)
 +CF_KEYWORDS(PRIMARY, STATS, COUNT, FOR, IN, COMMANDS, PREEXPORT, NOEXPORT, EXPORTED, GENERATE)
  CF_KEYWORDS(BGP, PASSWORDS, DESCRIPTION)
 -CF_KEYWORDS(RELOAD, IN, OUT, MRTDUMP, MESSAGES, RESTRICT, MEMORY, IGP_METRIC, CLASS, DSCP)
 +CF_KEYWORDS(RELOAD, IN, OUT, MRTDUMP, MESSAGES, RESTRICT, MEMORY, CLASS, DSCP)
  CF_KEYWORDS(TIMEFORMAT, ISO, SHORT, LONG, ROUTE, PROTOCOL, BASE, LOG, S, MS, US)
 -CF_KEYWORDS(GRACEFUL, RESTART, WAIT, MAX, FLUSH, AS)
 +CF_KEYWORDS(GRACEFUL, RESTART, WAIT, MAX, AS)
  CF_KEYWORDS(MIN, IDLE, RX, TX, INTERVAL, MULTIPLIER, PASSIVE)
  CF_KEYWORDS(CHECK, LINK)
- CF_KEYWORDS(SORTED, TRIE, MIN, MAX, SETTLE, TIME)
+ CF_KEYWORDS(SORTED, TRIE, MIN, MAX, SETTLE, TIME, GC, THRESHOLD, PERIOD)
  
  /* For r_args_channel */
  CF_KEYWORDS(IPV4, IPV4_MC, IPV4_MPLS, IPV6, IPV6_MC, IPV6_MPLS, IPV6_SADR, VPN4, VPN4_MC, VPN4_MPLS, VPN6, VPN6_MC, VPN6_MPLS, ROA4, ROA6, FLOW4, FLOW6, MPLS, PRI, SEC)
diff --cc nest/rt-table.c
index 3f8c7a83f,19bed165c..e7281b2e4
--- a/nest/rt-table.c
+++ b/nest/rt-table.c
@@@ -126,46 -124,8 +126,47 @@@ static inline void rt_flowspec_resolve_
  static inline void rt_prune_table(rtable *tab);
  static inline void rt_schedule_notify(rtable *tab);
  static void rt_flowspec_notify(rtable *tab, net *net);
+ static void rt_kick_prune_timer(rtable *tab);
 +static void rt_feed_by_fib(void *);
 +static void rt_feed_by_trie(void *);
 +static void rt_feed_equal(void *);
 +static void rt_feed_for(void *);
 +static uint rt_feed_net(struct rt_export_hook *c, net *n);
 +
 +const char *rt_import_state_name_array[TIS_MAX] = {
 +  [TIS_DOWN] = "DOWN",
 +  [TIS_UP] = "UP",
 +  [TIS_STOP] = "STOP",
 +  [TIS_FLUSHING] = "FLUSHING",
 +  [TIS_WAITING] = "WAITING",
 +  [TIS_CLEARED] = "CLEARED",
 +};
 +
 +const char *rt_export_state_name_array[TES_MAX] = {
 +  [TES_DOWN] = "DOWN",
 +  [TES_FEEDING] = "FEEDING",
 +  [TES_READY] = "READY",
 +  [TES_STOP] = "STOP"
 +};
 +
 +const char *rt_import_state_name(u8 state)
 +{
 +  if (state >= TIS_MAX)
 +    return "!! INVALID !!";
 +  else
 +    return rt_import_state_name_array[state];
 +}
 +
 +const char *rt_export_state_name(u8 state)
 +{
 +  if (state >= TES_MAX)
 +    return "!! INVALID !!";
 +  else
 +    return rt_export_state_name_array[state];
 +}
  
 +static inline struct rte_storage *rt_next_hop_update_rte(rtable *tab, net *n, rte *old);
 +static struct hostentry *rt_get_hostentry(rtable *tab, ip_addr a, ip_addr ll, rtable *dep);
  
  static void
  net_init_with_trie(struct fib *f, void *N)
@@@ -1481,16 -1473,12 +1482,15 @@@ rte_recalculate(struct rt_import_hook *
      }
  
    /* Propagate the route change */
 -  rte_announce(table, RA_UNDEF, net, new, old, net->routes, old_best);
 +  rte_announce(table, net, new_stored, old_stored,
 +      net->routes, old_best_stored);
  
    if (!net->routes &&
-       (table->gc_counter++ >= table->config->gc_max_ops) &&
-       (table->gc_time + table->config->gc_min_time <= current_time()))
-     rt_schedule_prune(table);
+       (table->gc_counter++ >= table->config->gc_threshold))
+     rt_kick_prune_timer(table);
  
 +#if 0
 +  /* Enable and reimplement these callbacks if anybody wants to use them */
    if (old_ok && p->rte_remove)
      p->rte_remove(net, old);
    if (new_ok && p->rte_insert)
@@@ -2331,32 -2136,24 +2354,33 @@@ rt_setup(pool *pp, struct rtable_confi
      t->fib.init = net_init_with_trie;
    }
  
 -  init_list(&t->channels);
    init_list(&t->flowspec_links);
 +
 +  t->exporter = (struct rt_exporter) {
 +    .addr_type = t->addr_type,
 +    .start = rt_table_export_start,
 +    .stop = rt_table_export_stop,
 +    .done = rt_table_export_done,
 +  };
 +  init_list(&t->exporter.hooks);
 +
 +  init_list(&t->imports);
 +
 +  hmap_init(&t->id_map, p, 1024);
 +  hmap_set(&t->id_map, 0);
 +
    init_list(&t->subscribers);
  
 -  if (!(t->internal = cf->internal))
 -  {
 -    hmap_init(&t->id_map, p, 1024);
 -    hmap_set(&t->id_map, 0);
 +  t->rt_event = ev_new_init(p, rt_event, t);
++  t->prune_timer = tm_new_init(p, rt_prune_timer, t, 0, 0);
 +  t->last_rt_change = t->gc_time = current_time();
  
 -    t->rt_event = ev_new_init(p, rt_event, t);
 -    t->prune_timer = tm_new_init(p, rt_prune_timer, t, 0, 0);
 -    t->last_rt_change = t->gc_time = current_time();
 +  t->rl_pipe = (struct tbf) TBF_DEFAULT_LOG_LIMITS;
  
 -    if (rt_is_flow(t))
 -    {
 -      t->flowspec_trie = f_new_trie(lp_new_default(p), 0);
 -      t->flowspec_trie->ipv4 = (t->addr_type == NET_FLOW4);
 -    }
 +  if (rt_is_flow(t))
 +  {
 +    t->flowspec_trie = f_new_trie(lp_new_default(p), 0);
 +    t->flowspec_trie->ipv4 = (t->addr_type == NET_FLOW4);
    }
  
    return t;
diff --cc nest/rt.h
index 4a7a087f2,000000000..b13c06bea
mode 100644,000000..100644
--- a/nest/rt.h
+++ b/nest/rt.h
@@@ -1,508 -1,0 +1,510 @@@
 +/*
 + *	BIRD Internet Routing Daemon -- Routing Table
 + *
 + *	(c) 1998--2000 Martin Mares <mj@ucw.cz>
 + *	(c) 2019--2021 Maria Matejka <mq@jmq.cz>
 + *
 + *	Can be freely distributed and used under the terms of the GNU GPL.
 + */
 +
 +#ifndef _BIRD_NEST_RT_H_
 +#define _BIRD_NEST_RT_H_
 +
 +#include "lib/lists.h"
 +#include "lib/bitmap.h"
 +#include "lib/resource.h"
 +#include "lib/net.h"
 +#include "lib/type.h"
 +#include "lib/fib.h"
 +#include "lib/route.h"
 +
 +struct ea_list;
 +struct protocol;
 +struct proto;
 +struct channel;
 +struct rte_src;
 +struct symbol;
 +struct timer;
 +struct filter;
 +struct f_trie;
 +struct f_trie_walk_state;
 +struct cli;
 +
 +/*
 + *	Master Routing Tables. Generally speaking, each of them contains a FIB
 + *	with each entry pointing to a list of route entries representing routes
 + *	to given network (with the selected one at the head).
 + *
 + *	Each of the RTE's contains variable data (the preference and protocol-dependent
 + *	metrics) and a pointer to a route attribute block common for many routes).
 + *
 + *	It's guaranteed that there is at most one RTE for every (prefix,proto) pair.
 + */
 +
 +struct rtable_config {
 +  node n;
 +  char *name;
 +  struct rtable *table;
 +  struct proto_config *krt_attached;	/* Kernel syncer attached to this table */
 +  uint addr_type;			/* Type of address data stored in table (NET_*) */
-   int gc_max_ops;			/* Maximum number of operations before GC is run */
-   int gc_min_time;			/* Minimum time between two consecutive GC runs */
++  uint gc_threshold;			/* Maximum number of operations before GC is run */
++  uint gc_period;			/* Approximate time between two consecutive GC runs */
 +  byte sorted;				/* Routes of network are sorted according to rte_better() */
 +  byte trie_used;			/* Rtable has attached trie */
 +  btime min_settle_time;		/* Minimum settle time for notifications */
 +  btime max_settle_time;		/* Maximum settle time for notifications */
 +};
 +
 +struct rt_export_hook;
 +struct rt_export_request;
 +
 +struct rt_exporter {
 +  list hooks;				/* Registered route export hooks */
 +  uint addr_type;			/* Type of address data exported (NET_*) */
 +  struct rt_export_hook *(*start)(struct rt_exporter *, struct rt_export_request *);
 +  void (*stop)(struct rt_export_hook *);
 +  void (*done)(struct rt_export_hook *);
 +};
 +
 +typedef struct rtable {
 +  resource r;
 +  node n;				/* Node in list of all tables */
 +  pool *rp;				/* Resource pool to allocate everything from, including itself */
 +  struct slab *rte_slab;		/* Slab to allocate route objects */
 +  struct fib fib;
 +  struct f_trie *trie;			/* Trie of prefixes defined in fib */
 +  char *name;				/* Name of this table */
 +  uint addr_type;			/* Type of address data stored in table (NET_*) */
 +  int use_count;			/* Number of protocols using this table */
 +  u32 rt_count;				/* Number of routes in the table */
 +
 +  list imports;				/* Registered route importers */
 +  struct rt_exporter exporter;		/* Exporter API structure */
 +
 +  struct hmap id_map;
 +  struct hostcache *hostcache;
 +  struct rtable_config *config;		/* Configuration of this table */
 +  struct config *deleted;		/* Table doesn't exist in current configuration,
 +					 * delete as soon as use_count becomes 0 and remove
 +					 * obstacle from this routing table.
 +					 */
 +  struct event *rt_event;		/* Routing table event */
++  struct timer *prune_timer;		/* Timer for periodic pruning / GC */
 +  btime last_rt_change;			/* Last time when route changed */
 +  btime base_settle_time;		/* Start time of rtable settling interval */
 +  btime gc_time;			/* Time of last GC */
-   int gc_counter;			/* Number of operations since last GC */
++  uint gc_counter;			/* Number of operations since last GC */
 +  byte prune_state;			/* Table prune state, 1 -> scheduled, 2-> running */
 +  byte prune_trie;			/* Prune prefix trie during next table prune */
 +  byte hcu_scheduled;			/* Hostcache update is scheduled */
 +  byte nhu_state;			/* Next Hop Update state */
 +  struct fib_iterator prune_fit;	/* Rtable prune FIB iterator */
 +  struct fib_iterator nhu_fit;		/* Next Hop Update FIB iterator */
 +  struct f_trie *trie_new;		/* New prefix trie defined during pruning */
 +  struct f_trie *trie_old;		/* Old prefix trie waiting to be freed */
 +  u32 trie_lock_count;			/* Prefix trie locked by walks */
 +  u32 trie_old_lock_count;		/* Old prefix trie locked by walks */
 +  struct tbf rl_pipe;			/* Rate limiting token buffer for pipe collisions */
 +
 +  list subscribers;			/* Subscribers for notifications */
 +  struct timer *settle_timer;		/* Settle time for notifications */
 +  list flowspec_links;			/* List of flowspec links, src for NET_IPx and dst for NET_FLOWx */
 +  struct f_trie *flowspec_trie;		/* Trie for evaluation of flowspec notifications */
 +} rtable;
 +
 +struct rt_subscription {
 +  node n;
 +  rtable *tab;
 +  void (*hook)(struct rt_subscription *b);
 +  void *data;
 +};
 +
 +struct rt_flowspec_link {
 +  node n;
 +  rtable *src;
 +  rtable *dst;
 +  u32 uc;
 +};
 +
 +#define NHU_CLEAN	0
 +#define NHU_SCHEDULED	1
 +#define NHU_RUNNING	2
 +#define NHU_DIRTY	3
 +
 +typedef struct network {
 +  struct rte_storage *routes;			/* Available routes for this network */
 +  struct fib_node n;			/* FIB flags reserved for kernel syncer */
 +} net;
 +
 +struct hostcache {
 +  slab *slab;				/* Slab holding all hostentries */
 +  struct hostentry **hash_table;	/* Hash table for hostentries */
 +  unsigned hash_order, hash_shift;
 +  unsigned hash_max, hash_min;
 +  unsigned hash_items;
 +  linpool *lp;				/* Linpool for trie */
 +  struct f_trie *trie;			/* Trie of prefixes that might affect hostentries */
 +  list hostentries;			/* List of all hostentries */
 +  byte update_hostcache;
 +};
 +
 +struct hostentry {
 +  node ln;
 +  ip_addr addr;				/* IP address of host, part of key */
 +  ip_addr link;				/* (link-local) IP address of host, used as gw
 +					   if host is directly attached */
 +  struct rtable *tab;			/* Dependent table, part of key */
 +  struct hostentry *next;		/* Next in hash chain */
 +  unsigned hash_key;			/* Hash key */
 +  unsigned uc;				/* Use count */
 +  ea_list *src;				/* Source attributes */
 +  byte nexthop_linkable;		/* Nexthop list is completely non-device */
 +  u32 igp_metric;			/* Chosen route IGP metric */
 +};
 +
 +struct rte_storage {
 +  struct rte_storage *next;		/* Next in chain */
 +  struct rte rte;			/* Route data */
 +};
 +
 +#define RTE_COPY(r, l) ((r) ? (((*(l)) = (r)->rte), (l)) : NULL)
 +#define RTE_OR_NULL(r) ((r) ? &((r)->rte) : NULL)
 +
 +/* Table-channel connections */
 +
 +struct rt_import_request {
 +  struct rt_import_hook *hook;		/* The table part of importer */
 +  char *name;
 +  u8 trace_routes;
 +
 +  void (*dump_req)(struct rt_import_request *req);
 +  void (*log_state_change)(struct rt_import_request *req, u8 state);
 +  /* Preimport is called when the @new route is just-to-be inserted, replacing @old.
 +   * Return a route (may be different or modified in-place) to continue or NULL to withdraw. */
 +  int (*preimport)(struct rt_import_request *req, struct rte *new, struct rte *old);
 +};
 +
 +struct rt_import_hook {
 +  node n;
 +  rtable *table;			/* The connected table */
 +  struct rt_import_request *req;	/* The requestor */
 +
 +  struct rt_import_stats {
 +    /* Import - from protocol to core */
 +    u32 pref;				/* Number of routes selected as best in the (adjacent) routing table */
 +    u32 updates_ignored;		/* Number of route updates rejected as already in route table */
 +    u32 updates_accepted;		/* Number of route updates accepted and imported */
 +    u32 withdraws_ignored;		/* Number of route withdraws rejected as already not in route table */
 +    u32 withdraws_accepted;		/* Number of route withdraws accepted and processed */
 +  } stats;
 +
 +  btime last_state_change;		/* Time of last state transition */
 +
 +  u8 import_state;			/* IS_* */
 +  u8 stale_set;				/* Set this stale_cycle to imported routes */
 +  u8 stale_valid;			/* Routes with this stale_cycle and bigger are considered valid */
 +  u8 stale_pruned;			/* Last prune finished when this value was set at stale_valid */
 +  u8 stale_pruning;			/* Last prune started when this value was set at stale_valid */
 +
 +  void (*stopped)(struct rt_import_request *);	/* Stored callback when import is stopped */
 +};
 +
 +struct rt_pending_export {
 +  struct rte_storage *new, *new_best, *old, *old_best;
 +};
 +
 +struct rt_export_request {
 +  struct rt_export_hook *hook;		/* Table part of the export */
 +  char *name;
 +  const net_addr *addr;			/* Network prefilter address */
 +  u8 trace_routes;
 +  u8 addr_mode;				/* Network prefilter mode (TE_ADDR_*) */
 +
 +  /* There are two methods of export. You can either request feeding every single change
 +   * or feeding the whole route feed. In case of regular export, &export_one is preferred.
 +   * Anyway, when feeding, &export_bulk is preferred, falling back to &export_one.
 +   * Thus, for RA_OPTIMAL, &export_one is only set,
 +   *	   for RA_MERGED and RA_ACCEPTED, &export_bulk is only set
 +   *	   and for RA_ANY, both are set to accomodate for feeding all routes but receiving single changes
 +   */
 +  void (*export_one)(struct rt_export_request *req, const net_addr *net, struct rt_pending_export *rpe);
 +  void (*export_bulk)(struct rt_export_request *req, const net_addr *net, struct rt_pending_export *rpe, rte **feed, uint count);
 +
 +  void (*dump_req)(struct rt_export_request *req);
 +  void (*log_state_change)(struct rt_export_request *req, u8);
 +};
 +
 +struct rt_export_hook {
 +  node n;
 +  struct rt_exporter *table;		/* The connected table */
 +
 +  pool *pool;
 +  linpool *lp;
 +
 +  struct rt_export_request *req;	/* The requestor */
 +
 +  struct rt_export_stats {
 +    /* Export - from core to protocol */
 +    u32 updates_received;		/* Number of route updates received */
 +    u32 withdraws_received;		/* Number of route withdraws received */
 +  } stats;
 +
 +  union {
 +    struct fib_iterator feed_fit;		/* Routing table iterator used during feeding */
 +    struct {
 +      struct f_trie_walk_state *walk_state;	/* Iterator over networks in trie */
 +      struct f_trie *walk_lock;			/* Locked trie for walking */
 +    };
 +    u32 hash_iter;				/* Iterator over hash */
 +  };
 +
 +  btime last_state_change;		/* Time of last state transition */
 +
 +  u8 refeed_pending;			/* Refeeding and another refeed is scheduled */
 +  u8 export_state;			/* Route export state (TES_*, see below) */
 +  u8 feed_type;				/* Which feeding method is used (TFT_*, see below) */
 +
 +  struct event *event;			/* Event running all the export operations */
 +
 +  void (*stopped)(struct rt_export_request *);	/* Stored callback when export is stopped */
 +};
 +
 +#define TIS_DOWN	0
 +#define TIS_UP		1
 +#define TIS_STOP	2
 +#define TIS_FLUSHING	3
 +#define TIS_WAITING	4
 +#define TIS_CLEARED	5
 +#define TIS_MAX		6
 +
 +#define TES_DOWN	0
 +#define TES_FEEDING	2
 +#define TES_READY	3
 +#define TES_STOP	4
 +#define TES_MAX		5
 +
 +/* Value of addr_mode */
 +#define TE_ADDR_NONE	0		/* No address matching */
 +#define TE_ADDR_EQUAL	1		/* Exact query - show route <addr> */
 +#define TE_ADDR_FOR	2		/* Longest prefix match - show route for <addr> */
 +#define TE_ADDR_IN	3		/* Interval query - show route in <addr> */
 +
 +
 +#define TFT_FIB		1
 +#define TFT_TRIE	2
 +#define TFT_HASH	3
 +
 +void rt_request_import(rtable *tab, struct rt_import_request *req);
 +void rt_request_export(struct rt_exporter *tab, struct rt_export_request *req);
 +
 +void rt_export_once(struct rt_exporter *tab, struct rt_export_request *req);
 +
 +void rt_stop_import(struct rt_import_request *, void (*stopped)(struct rt_import_request *));
 +void rt_stop_export(struct rt_export_request *, void (*stopped)(struct rt_export_request *));
 +
 +const char *rt_import_state_name(u8 state);
 +const char *rt_export_state_name(u8 state);
 +
 +static inline u8 rt_import_get_state(struct rt_import_hook *ih) { return ih ? ih->import_state : TIS_DOWN; }
 +static inline u8 rt_export_get_state(struct rt_export_hook *eh) { return eh ? eh->export_state : TES_DOWN; }
 +
 +void rt_set_export_state(struct rt_export_hook *hook, u8 state);
 +
 +void rte_import(struct rt_import_request *req, const net_addr *net, rte *new, struct rte_src *src);
 +
 +/* Types of route announcement, also used as flags */
 +#define RA_UNDEF	0		/* Undefined RA type */
 +#define RA_OPTIMAL	1		/* Announcement of optimal route change */
 +#define RA_ACCEPTED	2		/* Announcement of first accepted route */
 +#define RA_ANY		3		/* Announcement of any route change */
 +#define RA_MERGED	4		/* Announcement of optimal route merged with next ones */
 +
 +/* Return value of preexport() callback */
 +#define RIC_ACCEPT	1		/* Accepted by protocol */
 +#define RIC_PROCESS	0		/* Process it through import filter */
 +#define RIC_REJECT	-1		/* Rejected by protocol */
 +#define RIC_DROP	-2		/* Silently dropped by protocol */
 +
 +#define rte_update  channel_rte_import
 +/**
 + * rte_update - enter a new update to a routing table
 + * @c: channel doing the update
 + * @net: network address
 + * @rte: a &rte representing the new route
 + * @src: old route source identifier
 + *
 + * This function imports a new route to the appropriate table (via the channel).
 + * Table keys are @net (obligatory) and @rte->attrs->src.
 + * Both the @net and @rte pointers can be local.
 + *
 + * The route attributes (@rte->attrs) are obligatory. They can be also allocated
 + * locally. Anyway, if you use an already-cached attribute object, you shall
 + * call rta_clone() on that object yourself. (This semantics may change in future.)
 + *
 + * If the route attributes are local, you may set @rte->attrs->src to NULL, then
 + * the protocol's default route source will be supplied.
 + *
 + * When rte_update() gets a route, it automatically validates it. This includes
 + * checking for validity of the given network and next hop addresses and also
 + * checking for host-scope or link-scope routes. Then the import filters are
 + * processed and if accepted, the route is passed to route table recalculation.
 + *
 + * The accepted routes are then inserted into the table, replacing the old route
 + * for the same @net identified by @src. Then the route is announced
 + * to all the channels connected to the table using the standard export mechanism.
 + * Setting @rte to NULL makes this a withdraw, otherwise @rte->src must be the same
 + * as @src.
 + *
 + * All memory used for temporary allocations is taken from a special linpool
 + * @rte_update_pool and freed when rte_update() finishes.
 + */
 +void rte_update(struct channel *c, const net_addr *net, struct rte *rte, struct rte_src *src);
 +
 +extern list routing_tables;
 +struct config;
 +
 +void rt_init(void);
 +void rt_preconfig(struct config *);
++void rt_postconfig(struct config *);
 +void rt_commit(struct config *new, struct config *old);
 +void rt_lock_table(rtable *);
 +void rt_unlock_table(rtable *);
 +struct f_trie * rt_lock_trie(rtable *tab);
 +void rt_unlock_trie(rtable *tab, struct f_trie *trie);
 +void rt_subscribe(rtable *tab, struct rt_subscription *s);
 +void rt_unsubscribe(struct rt_subscription *s);
 +void rt_flowspec_link(rtable *src, rtable *dst);
 +void rt_flowspec_unlink(rtable *src, rtable *dst);
 +rtable *rt_setup(pool *, struct rtable_config *);
 +static inline void rt_shutdown(rtable *r) { rfree(r->rp); }
 +
 +static inline net *net_find(rtable *tab, const net_addr *addr) { return (net *) fib_find(&tab->fib, addr); }
 +static inline net *net_find_valid(rtable *tab, const net_addr *addr)
 +{ net *n = net_find(tab, addr); return (n && n->routes && rte_is_valid(&n->routes->rte)) ? n : NULL; }
 +static inline net *net_get(rtable *tab, const net_addr *addr) { return (net *) fib_get(&tab->fib, addr); }
 +net *net_get(rtable *tab, const net_addr *addr);
 +net *net_route(rtable *tab, const net_addr *n);
 +int rt_examine(rtable *t, net_addr *a, struct channel *c, const struct filter *filter);
 +rte *rt_export_merged(struct channel *c, rte ** feed, uint count, linpool *pool, int silent);
 +void rt_refresh_begin(struct rt_import_request *);
 +void rt_refresh_end(struct rt_import_request *);
 +void rt_modify_stale(rtable *t, struct rt_import_request *);
 +void rt_schedule_prune(rtable *t);
 +void rte_dump(struct rte_storage *);
 +void rte_free(struct rte_storage *);
 +struct rte_storage *rte_store(const rte *, net *net, rtable *);
 +void rt_dump(rtable *);
 +void rt_dump_all(void);
 +void rt_dump_hooks(rtable *);
 +void rt_dump_hooks_all(void);
 +int rt_reload_channel(struct channel *c);
 +void rt_reload_channel_abort(struct channel *c);
 +void rt_refeed_channel(struct channel *c);
 +void rt_prune_sync(rtable *t, int all);
 +struct rtable_config *rt_new_table(struct symbol *s, uint addr_type);
 +
 +static inline int rt_is_ip(rtable *tab)
 +{ return (tab->addr_type == NET_IP4) || (tab->addr_type == NET_IP6); }
 +
 +static inline int rt_is_vpn(rtable *tab)
 +{ return (tab->addr_type == NET_VPN4) || (tab->addr_type == NET_VPN6); }
 +
 +static inline int rt_is_roa(rtable *tab)
 +{ return (tab->addr_type == NET_ROA4) || (tab->addr_type == NET_ROA6); }
 +
 +static inline int rt_is_flow(rtable *tab)
 +{ return (tab->addr_type == NET_FLOW4) || (tab->addr_type == NET_FLOW6); }
 +
 +
 +/* Default limit for ECMP next hops, defined in sysdep code */
 +extern const int rt_default_ecmp;
 +
 +struct rt_show_data_rtable {
 +  node n;
 +  const char *name;
 +  struct rt_exporter *table;
 +  struct channel *export_channel;
 +  struct channel *prefilter;
 +  struct krt_proto *kernel;
 +};
 +
 +struct rt_show_data {
 +  struct cli *cli;			/* Pointer back to the CLI */
 +  net_addr *addr;
 +  list tables;
 +  struct rt_show_data_rtable *tab;	/* Iterator over table list */
 +  struct rt_show_data_rtable *last_table; /* Last table in output */
 +  struct rt_export_request req;		/* Export request in use */
 +  int verbose, tables_defined_by;
 +  const struct filter *filter;
 +  struct proto *show_protocol;
 +  struct proto *export_protocol;
 +  struct channel *export_channel;
 +  struct config *running_on_config;
 +  struct rt_export_hook *kernel_export_hook;
 +  int export_mode, addr_mode, primary_only, filtered, stats;
 +
 +  int net_counter, rt_counter, show_counter, table_counter;
 +  int net_counter_last, rt_counter_last, show_counter_last;
 +  int show_counter_last_flush;
 +};
 +
 +void rt_show(struct rt_show_data *);
 +struct rt_show_data_rtable * rt_show_add_exporter(struct rt_show_data *d, struct rt_exporter *t, const char *name);
 +struct rt_show_data_rtable * rt_show_add_table(struct rt_show_data *d, struct rtable *t);
 +
 +/* Value of table definition mode in struct rt_show_data */
 +#define RSD_TDB_DEFAULT	  0		/* no table specified */
 +#define RSD_TDB_INDIRECT  0		/* show route ... protocol P ... */
 +#define RSD_TDB_ALL	  RSD_TDB_SET			/* show route ... table all ... */
 +#define RSD_TDB_DIRECT	  RSD_TDB_SET | RSD_TDB_NMN	/* show route ... table X table Y ... */
 +
 +#define RSD_TDB_SET	  0x1		/* internal: show empty tables */
 +#define RSD_TDB_NMN	  0x2		/* internal: need matching net */
 +
 +/* Value of export_mode in struct rt_show_data */
 +#define RSEM_NONE	0		/* Export mode not used */
 +#define RSEM_PREEXPORT	1		/* Routes ready for export, before filtering */
 +#define RSEM_EXPORT	2		/* Routes accepted by export filter */
 +#define RSEM_NOEXPORT	3		/* Routes rejected by export filter */
 +#define RSEM_EXPORTED	4		/* Routes marked in export map */
 +
 +/* Host entry: Resolve hook for recursive nexthops */
 +extern struct ea_class ea_gen_hostentry;
 +struct hostentry_adata {
 +  adata ad;
 +  struct hostentry *he;
 +  u32 labels[0];
 +};
 +
 +void
 +ea_set_hostentry(ea_list **to, struct rtable *dep, struct rtable *tab, ip_addr gw, ip_addr ll, u32 lnum, u32 labels[lnum]);
 +
 +void ea_show_hostentry(const struct adata *ad, byte *buf, uint size);
 +void ea_show_nexthop_list(struct cli *c, struct nexthop_adata *nhad);
 +
 +/*
 + *	Default protocol preferences
 + */
 +
 +#define DEF_PREF_DIRECT		240	/* Directly connected */
 +#define DEF_PREF_STATIC		200	/* Static route */
 +#define DEF_PREF_OSPF		150	/* OSPF intra-area, inter-area and type 1 external routes */
 +#define DEF_PREF_BABEL		130	/* Babel */
 +#define DEF_PREF_RIP		120	/* RIP */
 +#define DEF_PREF_BGP		100	/* BGP */
 +#define DEF_PREF_RPKI		100	/* RPKI */
 +#define DEF_PREF_INHERITED	10	/* Routes inherited from other routing daemons */
 +#define DEF_PREF_UNKNOWN	0	/* Routes with no preference set */
 +
 +/*
 + *	Route Origin Authorization
 + */
 +
 +#define ROA_UNKNOWN	0
 +#define ROA_VALID	1
 +#define ROA_INVALID	2
 +
 +int net_roa_check(rtable *tab, const net_addr *n, u32 asn);
 +
 +#endif