Internet on FIRE

/*

 *        BIRD -- OSPF

 *

 *        (c) 1999 - 2000 Ondrej Filip <feela@network.cz>

 *

 *        Can be freely distributed and used under the terms of the GNU GPL.

 */

/**

 * DOC: Open Shortest Path First (OSPF)

 * 

 * The OSPF protocol is quite complicated and its complex implemenation is

 * split to many files. In |ospf.c|, you can find mostly interface

 * for communication with the core (e.g., reconfiguration hooks, shutdown

 * and initialisation and so on). In |packet.c|, you can find various

 * functions for sending and receiving of generic OSPF packets. There are

 * also routines for autentication and checksumming. File |iface.c| contains

 * the interface state machine, allocation and deallocation of OSPF's

 * interface data structures. Source |neighbor.c| includes the neighbor state

 * machine and functions for election of Designed Router and Backup

 * Designed router. In |hello.c|, there are routines for sending

 * and receiving of hello packets as well as functions for maintaining

 * wait times and the inactivity timer. Files |lsreq.c|, |lsack.c|, |dbdes.c|

 * contain functions for sending and receiving of link-state requests,

 * link-state acknoledges and database descriptions respectively.

 * In |lsupd.c|, there are functions for sending and receiving

 * of link-state updates and also the flooding algorithm. Source |topology.c| is

 * a place where routines for searching LSA's in the link-state database,

 * adding and deleting them reside, there also are functions for originating

 * of various types of LSA's (router LSA, net LSA, external LSA). File |rt.c|

 * contains routines for calculating the routing table. |lsalib.c| is a set

 * of various functions for working with the LSA's (endianity conversions,

 * calculation of checksum etc.).

 *

 * One instance of the protocol is able to hold LSA databases for

 * multiple OSPF areas, to exchange routing information between

 * multiple neighbors and to calculate the routing tables. The core

 * structure is &proto_ospf to which multiple &ospf_area and

 * &ospf_iface structures are connected. To &ospf_area is also connected

 * &top_hash_graph which is a dynamic hashing structure that

 * describes the link-state database. It allows fast search, addition

 * and deletion. Each LSA is kept in two pieces: header and body. Both of them are

 * kept in endianity of the CPU.

 * 

 * Every area has its own area_disp() which is

 * responsible for late originating of router LSA, calculating

 * of the routing table and it also ages and flushes the LSA's. This

 * function is called in regular intervals.

 * To every &ospf_iface, we connect one or more

 * &ospf_neighbor's -- a structure containing many timers and queues

 * for building adjacency and for exchange of routing messages.

 *

 * BIRD's OSPF implementation respects RFC2328 in every detail, but

 * some of internal algorithms do differ. The RFC recommends to make a snapshot

 * of the link-state database when a new adjacency is forming and send

 * the database description packets based on information of this 

 * snapshot. The database can be quite large in some networks, so

 * we rather walk through a &slist structure which allows us to

 * continue even if the actual LSA we were worked with is deleted. New

 * LSA's are added at the tail of this &slist.

 *

 * We also don't keep a separate OSPF routing table, because the core

 * helps us by being able to recognize when a route is updated

 * to an identical one and it suppresses the update automatically.

 * Due to this, we can flush all the routes we've recalculated and

 * also those we're deleted to the core's routing table and the

 * core will take care of the rest. This simplifies the process

 * and conserves memory.

 */

#include "ospf.h"

static int

ospf_start(struct proto *p)

{

  struct proto_ospf *po=(struct proto_ospf *)p;

  struct ospf_config *c=(struct ospf_config *)(p->cf);

  struct ospf_area_config *ac;

  struct ospf_area *oa;

  fib_init(&po->efib,p->pool,sizeof(struct extfib),16,init_efib);

  init_list(&(po->iface_list));

  init_list(&(po->area_list));

  po->areano=0;

  if(EMPTY_LIST(c->area_list))

  {

    log("%s: Cannot start, no OSPF areas configured", p->name);

    return PS_DOWN;

  }

  WALK_LIST(ac,c->area_list)

  {

    oa=mb_allocz(po->proto.pool, sizeof(struct ospf_area));

    add_tail(&po->area_list,NODE oa);

    po->areano++;

    oa->stub=ac->stub;

    oa->tick=ac->tick;

    oa->areaid=ac->areaid;

    oa->gr=ospf_top_new(po);

    s_init_list(&(oa->lsal));

    oa->rt=NULL;

    oa->po=po;

    oa->disp_timer=tm_new(po->proto.pool);

    oa->disp_timer->data=oa;

    oa->disp_timer->randomize=0;

    oa->disp_timer->hook=area_disp;

    oa->disp_timer->recurrent=oa->tick;

    tm_start(oa->disp_timer,oa->tick);

    oa->calcrt=0;

    oa->origrt=0;

    fib_init(&oa->infib,po->proto.pool,sizeof(struct infib),16,init_infib);

  }

  return PS_UP;

}

static void

ospf_dump(struct proto *p)

{

  char areastr[20];

  struct ospf_iface *ifa;

  struct ospf_neighbor *n;

  struct ospf_config *c = (void *) p->cf;

  struct proto_ospf *po=(struct proto_ospf *)p;

  struct ospf_area *oa;

  OSPF_TRACE(D_EVENTS, "Area number: %d", po->areano);

  WALK_LIST(ifa, po->iface_list)

  {

    OSPF_TRACE(D_EVENTS, "Interface: %s", ifa->iface->name);

    OSPF_TRACE(D_EVENTS, "state: %u", ifa->state);

    OSPF_TRACE(D_EVENTS, "DR:  %I", ifa->drid);

    OSPF_TRACE(D_EVENTS, "BDR: %I", ifa->bdrid);

    WALK_LIST(n, ifa->neigh_list)

    {

      OSPF_TRACE(D_EVENTS, "  neighbor %I in state %u", n->rid, n->state);

    }

  }

  WALK_LIST(NODE oa,po->area_list)

  {

    OSPF_TRACE(D_EVENTS, "LSA graph dump for area \"%I\" start:", oa->areaid);

    ospf_top_dump(oa->gr,p);

    OSPF_TRACE(D_EVENTS, "LSA graph dump for area \"%I\" finished", oa->areaid);

  }

  neigh_dump_all();

}

static struct proto *

ospf_init(struct proto_config *c)

{

  struct proto *p = proto_new(c, sizeof(struct proto_ospf));

  struct proto_ospf *po=(struct proto_ospf *)p;

  struct ospf_config *oc=(struct ospf_config *)c;

  struct ospf_area_config *ac;

  struct ospf_iface_patt *patt;

  p->import_control = ospf_import_control;

  p->make_tmp_attrs = ospf_make_tmp_attrs;

  p->store_tmp_attrs = ospf_store_tmp_attrs;

  p->rt_notify = ospf_rt_notify;

  p->if_notify = ospf_if_notify;

  p->rte_better = ospf_rte_better;

  p->rte_same = ospf_rte_same;

  po->rfc1583=oc->rfc1583;

  return p;

}

/* If new is better return 1 */

static int

ospf_rte_better(struct rte *new, struct rte *old)

{

  struct proto *p = new->attrs->proto;

  if(new->u.ospf.metric1=LSINFINITY) return 0;

  if(((new->attrs->source==RTS_OSPF) || (new->attrs->source==RTS_OSPF_IA))

    && (old->attrs->source==RTS_OSPF_EXT)) return 1;

  if(((old->attrs->source==RTS_OSPF) || (old->attrs->source==RTS_OSPF_IA))

    && (new->attrs->source==RTS_OSPF_EXT)) return 0;

  if(new->u.ospf.metric2!=0)

  {

    if(old->u.ospf.metric2==0) return 0;

    if(new->u.ospf.metric2<old->u.ospf.metric2) return 1;

    return 0;

  }

  else

  {

    if(old->u.ospf.metric2!=0) return 1;

    if(new->u.ospf.metric1<old->u.ospf.metric1) return 1;

    return 0;

  }

}

static int

ospf_rte_same(struct rte *new, struct rte *old)

{

  /* new->attrs == old->attrs always */

  return

    new->u.ospf.metric1 == old->u.ospf.metric1 &&

    new->u.ospf.metric2 == old->u.ospf.metric2 &&

    new->u.ospf.tag     == old->u.ospf.tag;

}

static ea_list *

ospf_build_attrs(ea_list *next, struct linpool *pool, u32 m1, u32 m2, u32 tag)

{

  struct ea_list *l = lp_alloc(pool, sizeof(struct ea_list) + 3*sizeof(eattr));

  l->next = next;

  l->flags = EALF_SORTED;

  l->count = 3;

  l->attrs[0].id = EA_OSPF_METRIC1;

  l->attrs[0].flags = 0;

  l->attrs[0].type = EAF_TYPE_INT | EAF_TEMP;

  l->attrs[0].u.data = m1;

  l->attrs[1].id = EA_OSPF_METRIC2;

  l->attrs[1].flags = 0;

  l->attrs[1].type = EAF_TYPE_INT | EAF_TEMP;

  l->attrs[1].u.data = m2;

  l->attrs[2].id = EA_OSPF_TAG;

  l->attrs[2].flags = 0;

  l->attrs[2].type = EAF_TYPE_INT | EAF_TEMP;

  l->attrs[2].u.data = tag;

  return l;

}

void

schedule_rt_lsa(struct ospf_area *oa)

{

  struct proto_ospf *po=oa->po;

  struct proto *p=&po->proto;

  OSPF_TRACE(D_EVENTS, "Scheduling RT lsa origination for area %I.",

    oa->areaid);

  oa->origrt=1;

}

void

schedule_rtcalc(struct ospf_area *oa)

{

  struct proto_ospf *po=oa->po;

  struct proto *p=&po->proto;

  OSPF_TRACE(D_EVENTS, "Scheduling RT calculation for area %I.", 

    oa->areaid);

  oa->calcrt=1;

}

/**

 * area_disp - invokes link-state database aging, originating of

 * router LSA and routing table calculation

 * @timer - it's called every @ospf_area->tick seconds

 *

 * It ivokes aging and when @ospf_area->origrt is set to 1, start

 * function for origination of router LSA. It also start routing

 * table calculation when @ospf_area->calcrt is set.

 */

void

area_disp(timer *timer)

{

  struct ospf_area *oa=timer->data;

  struct top_hash_entry *en,*nxt;

  /* First of all try to age LSA DB */

  ospf_age(oa);

  /* Now try to originage rt_lsa */

  if(oa->origrt) originate_rt_lsa(oa);

  oa->origrt=0;

  if(oa->calcrt) ospf_rt_spfa(oa);

  oa->calcrt=0;

}

/**

 * ospf_import_control - accept or reject new route from nest's routing table

 * @p: current instance of protocol

 * @attrs: list of arttributes

 * @pool: pool for alloction of attributes

 *

 * Its quite simple. It does not accept our own routes and decision of

 * import leaves to the filters.

 */

int

ospf_import_control(struct proto *p, rte **new, ea_list **attrs, struct linpool *pool)

{

  rte *e=*new;

  struct proto_ospf *po=(struct proto_ospf *)p;

  if(p==e->attrs->proto) return -1;        /* Reject our own routes */

  *attrs = ospf_build_attrs(*attrs, pool, LSINFINITY, 10000, 0);

  return 0;                                /* Leave decision to the filters */

}

struct ea_list *

ospf_make_tmp_attrs(struct rte *rt, struct linpool *pool)

{

  return ospf_build_attrs(NULL, pool, rt->u.ospf.metric1, rt->u.ospf.metric2, rt->u.ospf.tag);

}

void

ospf_store_tmp_attrs(struct rte *rt, struct ea_list *attrs)

{

  rt->u.ospf.metric1 = ea_get_int(attrs, EA_OSPF_METRIC1, LSINFINITY);

  rt->u.ospf.metric2 = ea_get_int(attrs, EA_OSPF_METRIC2, 10000);

  rt->u.ospf.tag     = ea_get_int(attrs, EA_OSPF_TAG,     0);

}

/**

 * ospf_shutdown - Finnish of OSPF instance

 * @p: current instance of protocol

 *

 * RFC does not define any action that should be taken befor router

 * shutdown. To make my neighbors react as fast as possible, I send

 * them hello packet with empty neighbor list. They should start

 * theirs neighbor state machine with event %NEIGHBOR_1WAY.

 */

static int

ospf_shutdown(struct proto *p)

{

  struct proto_ospf *po=(struct proto_ospf *)p;

  struct ospf_iface *ifa;

  struct ospf_neighbor *n;

  struct ospf_area *oa;

  OSPF_TRACE(D_EVENTS, "Shutdown requested");

  /* And send to all my neighbors 1WAY */

  WALK_LIST(ifa, po->iface_list)

  {

    init_list(&ifa->neigh_list);

    hello_timer_hook(ifa->hello_timer);

  }

  return PS_DOWN;

}

void

ospf_rt_notify(struct proto *p, net *n, rte *new, rte *old, ea_list *attrs)

{

  struct proto_ospf *po=(struct proto_ospf *)p;

  OSPF_TRACE(D_EVENTS, "Got route %I/%d %s", p->name, n->n.prefix,

    n->n.pxlen, new ? "up" : "down");

  if(new)                /* Got some new route */

  {

    originate_ext_lsa(n, new, po, attrs);

  }

  else

  {

    u32 rtid=po->proto.cf->global->router_id;

    struct ospf_area *oa;

    struct top_hash_entry *en;

    u32 pr=ipa_to_u32(n->n.prefix);

    struct ospf_lsa_ext *ext;

    int i;

    /* Flush old external LSA */

    WALK_LIST(oa, po->area_list)

    {

      for(i=0;i<MAXNETS;i++,pr++)

      {

        if(en=ospf_hash_find(oa->gr, pr, rtid, LSA_T_EXT))

        {

          ext=en->lsa_body;

          if(ipa_compare(ext->netmask, ipa_mkmask(n->n.pxlen))==0)

          {

            net_flush_lsa(en,po,oa);

            break;

          }

        }

      }

    }

  }

}

static void

ospf_get_status(struct proto *p, byte *buf)

{

  struct proto_ospf *po=(struct proto_ospf *)p;

  if (p->proto_state == PS_DOWN) buf[0] = 0;

  else

  {

    struct ospf_iface *ifa;

    struct ospf_neighbor *n;

    int adj=0;

    WALK_LIST(ifa,po->iface_list)

      WALK_LIST(n,ifa->neigh_list)

        if(n->state==NEIGHBOR_FULL) adj=1;

    if(adj==0) strcpy(buf, "Alone");

    else strcpy(buf, "Running");

  }

}

static void

ospf_get_route_info(rte *rte, byte *buf, ea_list *attrs)

{

  char met=' ';

  char type=' ';

  if(rte->attrs->source==RTS_OSPF_EXT)

  {

    met='1';

    type='E';

  }

  if(rte->u.ospf.metric2!=LSINFINITY) met='2';

  if(rte->attrs->source==RTS_OSPF_IA) type='A';

  if(rte->attrs->source==RTS_OSPF) type='I';

  buf += bsprintf(buf, " %c", type);

  if(met!=' ') buf += bsprintf(buf, "%c", met);

  buf += bsprintf(buf, " (%d/%d)", rte->pref,

    (rte->u.ospf.metric2==LSINFINITY) ? rte->u.ospf.metric1 :

    rte->u.ospf.metric2);

  if(rte->attrs->source==RTS_OSPF_EXT && rte->u.ospf.tag)

  {

    buf += bsprintf(buf, " [%x]", rte->u.ospf.tag);

  }

}

static int

ospf_get_attr(eattr *a, byte *buf)

{

  switch (a->id)

    {

    case EA_OSPF_METRIC1: bsprintf(buf, "metric1"); return GA_NAME;

    case EA_OSPF_METRIC2: bsprintf(buf, "metric2"); return GA_NAME;

    case EA_OSPF_TAG: bsprintf(buf, "tag: %08x", a->u.data); return GA_FULL;

    default: return GA_UNKNOWN;

    }

}

static int

ospf_patt_compare(struct ospf_iface_patt *a, struct ospf_iface_patt *b)

{

  return ((a->type==b->type)&&(a->priority==b->priority));

}

/**

 * ospf_reconfigure - reconfiguration hook

 * @p: current instance of protocol (with old configuration)

 * @c: new configuration requested by user

 *

 * This hook tries to be a little bit inteligent. Instance of OSPF

 * will survive change of many constants like hello interval,

 * password change, addition of deletion of some neighbor on

 * nonbroadcast network, cost of interface, etc.

 */

static int

ospf_reconfigure(struct proto *p, struct proto_config *c)

{

  struct ospf_config *old=(struct ospf_config *)(p->cf);

  struct ospf_config *new=(struct ospf_config *)c;

  struct ospf_area_config *ac1,*ac2;

  struct proto_ospf *po=( struct proto_ospf *)p;

  struct ospf_iface_patt *ip1,*ip2;

  struct ospf_iface *ifa;

  struct nbma_node *nb1,*nb2,*nbnx;

  struct ospf_area *oa;

  int found;

  po->rfc1583=new->rfc1583;

  WALK_LIST(oa, po->area_list)        /* Routing table must be recalculated */

  {

    schedule_rtcalc(oa);

  }

  ac1=HEAD(old->area_list);

  ac2=HEAD(new->area_list);

  /* I should get it in same order */

  while(((NODE (ac1))->next!=NULL) && ((NODE (ac2))->next!=NULL))

  {

    if(ac1->areaid!=ac2->areaid) return 0;

    if(ac1->stub!=ac2->stub) return 0;

    if(ac1->tick!=ac2->tick)

    {

      WALK_LIST(oa,po->area_list)

      {

        if(oa->areaid==ac2->areaid)

        {

          oa->tick=ac2->tick;

          tm_start(oa->disp_timer,oa->tick);

          OSPF_TRACE(D_EVENTS,

            "Changing tick interval on area %I from %d to %d",

            oa->areaid, ac1->tick, ac2->tick);

          break;

        }

      }

    }

    if(!iface_patts_equal(&ac1->patt_list, &ac2->patt_list,

      (void *) ospf_patt_compare))

        return 0;

    WALK_LIST(ifa, po->iface_list)

    {

      if(ip1=(struct ospf_iface_patt *)

        iface_patt_match(&ac1->patt_list, ifa->iface))

      {

        /* Now reconfigure interface */

        if(!(ip2=(struct ospf_iface_patt *)

          iface_patt_match(&ac2->patt_list, ifa->iface))) return 0;

        /* HELLO TIMER */

        if(ip1->helloint!=ip2->helloint)

        {

          ifa->helloint=ip2->helloint;

          ifa->hello_timer->recurrent=ifa->helloint;

          tm_start(ifa->hello_timer,ifa->helloint);

          OSPF_TRACE(D_EVENTS,

            "Changing hello interval on interface %s from %d to %d",

            ifa->iface->name,ip1->helloint,ip2->helloint);

        }

        /* COST */

        if(ip1->cost!=ip2->cost)

        {

          ifa->cost=ip2->cost;

          OSPF_TRACE(D_EVENTS,

            "Changing cost interface %s from %d to %d",

            ifa->iface->name,ip1->cost,ip2->cost);

          schedule_rt_lsa(ifa->oa);

        }

        /* AUTHETICATION */

        if(ip1->autype!=ip2->autype)

        {

          ifa->autype=ip2->autype;

          OSPF_TRACE(D_EVENTS,

            "Changing autentication type on interface %s",

            ifa->iface->name);

        }

        if(strncmp(ip1->password,ip2->password,8)!=0)

        {

          memcpy(ifa->aukey,ip2->password,8);

          OSPF_TRACE(D_EVENTS,

            "Changing password on interface %s",

            ifa->iface->name);

        }

        /* RXMT */

        if(ip1->rxmtint!=ip2->rxmtint)

        {

          ifa->rxmtint=ip2->rxmtint;

          OSPF_TRACE(D_EVENTS,

            "Changing retransmit interval on interface %s from %d to %d",

            ifa->iface->name,ip1->rxmtint,ip2->rxmtint);

        }

        /* WAIT */

        if(ip1->waitint!=ip2->waitint)

        {

          ifa->waitint=ip2->waitint;

          if(ifa->wait_timer->expires!=0)

            tm_start(ifa->wait_timer,ifa->waitint);

          OSPF_TRACE(D_EVENTS,

            "Changing wait interval on interface %s from %d to %d",

            ifa->iface->name,ip1->waitint,ip2->waitint);

        }

        /* INFTRANS */

        if(ip1->inftransdelay!=ip2->inftransdelay)

        {

          ifa->inftransdelay=ip2->inftransdelay;

          OSPF_TRACE(D_EVENTS,

            "Changing transmit delay on interface %s from %d to %d",

            ifa->iface->name,ip1->inftransdelay,ip2->inftransdelay);

        }

        /* DEAD COUNT */

        if(ip1->deadc!=ip2->deadc)

        {

          ifa->deadc=ip2->deadc;

          OSPF_TRACE(D_EVENTS,

            "Changing dead count on interface %s from %d to %d",

            ifa->iface->name,ip1->deadc,ip2->deadc);

        }

        /* NBMA LIST */

        /* First remove old */

        WALK_LIST_DELSAFE(nb1, nbnx, ifa->nbma_list)

        {

          found=0;

          WALK_LIST(nb2, ip2->nbma_list)

            if(ipa_compare(nb1->ip,nb2->ip)==0)

            {

              found=1;

              break;

            }

          if(!found)

          {

            OSPF_TRACE(D_EVENTS,

              "Removing NBMA neighbor %I on interface %s",

              nb1->ip,ifa->iface->name);

            rem_node(NODE nb1);

            mb_free(nb1);

          }

        }

        /* And then add new */

        WALK_LIST(nb2, ip2->nbma_list)

        {

          found=0;

          WALK_LIST(nb1, ifa->nbma_list)

            if(ipa_compare(nb1->ip,nb2->ip)==0)

            {

              found=1;

              break;

            }

          if(!found)

          {

            nb1=mb_alloc(p->pool,sizeof(struct nbma_node));

            nb1->ip=nb2->ip;

            add_tail(&ifa->nbma_list, NODE nb1);

            OSPF_TRACE(D_EVENTS,

              "Adding NBMA neighbor %I on interface %s",

              nb1->ip,ifa->iface->name);

          }

        }

      }

    }

    NODE ac1=(NODE (ac1))->next;

    NODE ac2=(NODE (ac2))->next;

  }

  if(((NODE (ac1))->next)!=((NODE (ac2))->next))

    return 0;        /* One is not null */

  return 1;        /* Everythink OK :-) */

}

void

ospf_sh_neigh(struct proto *p, char *iff)

{

  struct ospf_iface *ifa=NULL,*f;

  struct ospf_neighbor *n;

  struct proto_ospf *po=(struct proto_ospf *)p;

  if(p->proto_state != PS_UP)

  {

    cli_msg(-1013,"%s: is not up", p->name);

    cli_msg(0,"");

    return;

  }

  if(iff!=NULL)

  {

    WALK_LIST(f, po->iface_list)

    {

      if(strcmp(iff,f->iface->name)==0)

      {

        ifa=f;

        break;

      }

    }

    if(ifa==NULL)

    {

      cli_msg(0,"");

      return;

    }

    cli_msg(-1013,"%s:", p->name);

    cli_msg(-1013,"%-12s\t%3s\t%-15s\t%-5s\t%-12s\t%-10s","Router ID","Pri",

      "     State", "DTime", "Router IP", "Interface");

    WALK_LIST(n, ifa->neigh_list) ospf_sh_neigh_info(n);

    cli_msg(0,"");

    return;

  }

  cli_msg(-1013,"%s:", p->name);

  cli_msg(-1013,"%-12s\t%3s\t%-15s\t%-5s\t%-12s\t%-10s","Router ID","Pri",

    "     State", "DTime", "Router IP", "Interface");

  WALK_LIST(ifa,po->iface_list)

    WALK_LIST(n, ifa->neigh_list)

      ospf_sh_neigh_info(n);

  cli_msg(0,"");

}

void

ospf_sh(struct proto *p)

{

  struct ospf_area *oa;

  struct proto_ospf *po=(struct proto_ospf *)p;

  struct ospf_iface *ifa;

  struct ospf_neighbor *n;

  int ifano;

  int nno;

  int adjno;

  if(p->proto_state != PS_UP)

  {

    cli_msg(-1014,"%s: is not up", p->name);

    cli_msg(0,"");

    return;

  }

  cli_msg(-1014,"%s:", p->name);

  cli_msg(-1014,"Number of areas: %u", po->areano);

  WALK_LIST(oa,po->area_list)

  {

    cli_msg(-1014,"\tArea: %I (%u) %s", oa->areaid, oa->areaid,

      oa->areaid==0 ? "[BACKBONE]" : "");

    ifano=0;

    nno=0;

    adjno=0;

    WALK_LIST(ifa, po->iface_list)

    {

      if(oa==ifa->oa) ifano++;

      WALK_LIST(n, ifa->neigh_list)

      {

        nno++;

        if(n->state==NEIGHBOR_FULL) adjno++;

      }

    }

    cli_msg(-1014,"\t\tStub:\t%s", oa->stub ? "Yes" : "No");

    cli_msg(-1014,"\t\tRT scheduler tick:\t%u", oa->tick);

    cli_msg(-1014,"\t\tNumber of interfaces:\t%u", ifano);

    cli_msg(-1014,"\t\tNumber of LSAs in DB:\t%u", oa->gr->hash_entries);

    cli_msg(-1014,"\t\tNumber of neighbors:\t%u", nno);

    cli_msg(-1014,"\t\tNumber of adjacent neighbors:\t%u", adjno);

  }

  cli_msg(0,"");

}

void

ospf_sh_iface(struct proto *p, char *iff)

{

  struct ospf_area *oa;

  struct proto_ospf *po=(struct proto_ospf *)p;

  struct ospf_iface *ifa=NULL,*f;

  struct ospf_neighbor *n;

  int ifano;

  int nno;

  int adjno;

  if(p->proto_state != PS_UP)

  {

    cli_msg(-1015,"%s: is not up", p->name);

    cli_msg(0,"");

    return;

  }

  if(iff!=NULL)

  {

    WALK_LIST(f, po->iface_list)

    {

      if(strcmp(iff,f->iface->name)==0)

      {

        ifa=f;

        break;

      }

    }

    if(ifa==NULL)

    {

      cli_msg(0,"");

      return;

    }

    cli_msg(-1015,"%s:", p->name);

    ospf_iface_info(ifa);

    cli_msg(0,"");

    return;

  }

  cli_msg(-1015,"%s:", p->name);

  WALK_LIST(ifa, po->iface_list) ospf_iface_info(ifa);

  cli_msg(0,"");

}

struct protocol proto_ospf = {

  name:                 "OSPF",

  template:                "ospf%d",

  attr_class:                EAP_OSPF,

  init:                        ospf_init,

  dump:                        ospf_dump,

  start:                ospf_start,

  shutdown:                ospf_shutdown,

  get_route_info:        ospf_get_route_info,

  get_attr:                ospf_get_attr,

  get_status:                ospf_get_status,

  reconfigure:                ospf_reconfigure

};