1 files changed, 451 insertions, 253 deletions

diff --git a/proto/ospf/rt.c b/proto/ospf/rt.c
index a230d38..832281e 100644
--- a/proto/ospf/rt.c
+++ b/proto/ospf/rt.c
@@ -8,20 +8,29 @@
 
 #include "ospf.h"
 
-static void
-add_cand(list * l, struct top_hash_entry *en,
-	 struct top_hash_entry *par, u16 dist, struct ospf_area *oa);
-static void
-calc_next_hop(struct top_hash_entry *en,
-	      struct top_hash_entry *par, struct ospf_area *oa);
+static void add_cand(list * l, struct top_hash_entry *en, 
+		     struct top_hash_entry *par, u32 dist,
+		     struct ospf_area *oa);
+static void calc_next_hop(struct ospf_area *oa,
+			  struct top_hash_entry *en,
+			  struct top_hash_entry *par);
 static void ospf_ext_spf(struct proto_ospf *po);
 static void rt_sync(struct proto_ospf *po);
 
+/* In ospf_area->rtr we store paths to routers, but we use RID (and not IP address)
+   as index, so we need to encapsulate RID to IP address */
+#ifdef OSPFv2
+#define ipa_from_rid(x) _MI(x)
+#else /* OSPFv3 */
+#define ipa_from_rid(x) _MI(0,0,0,x)
+#endif
+
+
 static void
 fill_ri(orta * orta)
 {
   orta->type = RTS_DUMMY;
-  orta->capa = 0;
+  orta->options = 0;
   orta->oa = NULL;
   orta->metric1 = LSINFINITY;
   orta->metric2 = LSINFINITY;
@@ -137,88 +146,109 @@ ri_install(struct proto_ospf *po, ip_addr prefix, int pxlen, int dest,
 }
 
 static void
-ospf_rt_spfa(struct ospf_area *oa)
+add_network(struct ospf_area *oa, ip_addr px, int pxlen, int metric, struct top_hash_entry *en)
 {
-  u32 i, *rts;
-  struct ospf_lsa_rt *rt;
-  struct ospf_lsa_rt_link *rtl, *rr;
-  struct proto *p = &oa->po->proto;
-  struct proto_ospf *po = oa->po;
-  struct ospf_lsa_net *ln;
   orta nf;
-  struct ospf_iface *iface;
-  struct top_hash_entry *act, *tmp;
-  node *n;
+  nf.type = RTS_OSPF;
+  nf.options = 0;
+  nf.metric1 = metric;
+  nf.metric2 = LSINFINITY;
+  nf.tag = 0;
+  nf.oa = oa;
+  nf.ar = en;
+  nf.nh = en->nh;
+  nf.ifa = en->nhi;
+
+  /* FIXME check nf.ifa on stubs */
+  ri_install(oa->po, px, pxlen, ORT_NET, &nf, NULL);
+}
 
+#ifdef OSPFv3
+static void
+process_prefixes(struct ospf_area *oa)
+{
+  struct proto_ospf *po = oa->po;
+  struct proto *p = &po->proto;
+  struct top_hash_entry *en, *src;
+  struct ospf_lsa_prefix *px;
+  ip_addr pxa;
+  int pxlen;
+  u8 pxopts;
+  u16 metric;
+  u32 *buf;
+  int i;
 
-  if (oa->rt == NULL)
-    return;
+  WALK_SLIST(en, po->lsal)
+  {
+    if (en->lsa.type != LSA_T_PREFIX)
+      continue;
 
-  OSPF_TRACE(D_EVENTS, "Starting routing table calculation for area %R", oa->areaid);
+    if (en->domain != oa->areaid)
+      continue;
 
-  if (oa->rt->dist != LSINFINITY)
-    bug("Aging was not processed.");
+    if (en->lsa.age == LSA_MAXAGE)
+      continue;
 
-  init_list(&oa->cand);		/* Empty list of candidates */
-  oa->trcap = 0;
+    px = en->lsa_body;
 
-  DBG("LSA db prepared, adding me into candidate list.\n");
+    /* For router prefix-LSA, we would like to find the first router-LSA */
+    if (px->ref_type == LSA_T_RT)
+      src = ospf_hash_find_rt(po->gr, oa->areaid, px->ref_rt);
+    else
+      src = ospf_hash_find(po->gr, oa->areaid, px->ref_id, px->ref_rt, px->ref_type);
 
-  oa->rt->dist = 0;
-  oa->rt->color = CANDIDATE;
-  add_head(&oa->cand, &oa->rt->cn);
-  DBG("RT LSA: rt: %R, id: %R, type: %u\n",
-      oa->rt->lsa.rt, oa->rt->lsa.id, oa->rt->lsa.type);
+    if (!src)
+      continue;
 
-  while (!EMPTY_LIST(oa->cand))
-  {
-    n = HEAD(oa->cand);
-    act = SKIP_BACK(struct top_hash_entry, cn, n);
-    rem_node(n);
+    if (src->lsa.age == LSA_MAXAGE)
+      continue;
 
-    DBG("Working on LSA: rt: %R, id: %R, type: %u\n",
-	act->lsa.rt, act->lsa.id, act->lsa.type);
+    if ((src->lsa.type != LSA_T_RT) && (src->lsa.type != LSA_T_NET))
+      continue;
 
-    act->color = INSPF;
-    switch (act->lsa.type)
-    {
-    case LSA_T_RT:
-      rt = (struct ospf_lsa_rt *) act->lsa_body;
-      if (rt->veb.bit.v)
-	oa->trcap = 1;
-      if (rt->veb.bit.b || rt->veb.bit.e)
+    buf = px->rest;
+    for (i = 0; i < px->pxcount; i++)
       {
-	nf.type = RTS_OSPF;
-	nf.capa = 0;
-        if (rt->veb.bit.b) nf.capa |= ORTA_ABR;
-        if (rt->veb.bit.e) nf.capa |= ORTA_ASBR;
-	nf.metric1 = act->dist;
-	nf.metric2 = LSINFINITY;
-	nf.tag = 0;
-	nf.oa = oa;
-	nf.ar = act;
-	nf.nh = act->nh;
-	nf.ifa = act->nhi;
-	ri_install(po, ipa_from_u32(act->lsa.id), 32, ORT_ROUTER, &nf, NULL);
+	buf = lsa_get_ipv6_prefix(buf, &pxa, &pxlen, &pxopts, &metric);
+
+	if (pxopts & OPT_PX_NU)
+	  continue;
+
+	add_network(oa, pxa, pxlen, src->dist + metric, src);
       }
-      rr = (struct ospf_lsa_rt_link *) (rt + 1);
-      DBG("  Number of links: %u\n", rt->links);
-      for (i = 0; i < rt->links; i++)
-      {
-	tmp = NULL;
-	rtl = (rr + i);
-	DBG("     Working on link: %R (type: %u)  ", rtl->id, rtl->type);
-	switch (rtl->type)
+  }
+}
+#endif
+
+
+static void
+ospf_rt_spfa_rtlinks(struct ospf_area *oa, struct top_hash_entry *act, struct top_hash_entry *en)
+{
+  struct proto *p = &oa->po->proto;
+  struct proto_ospf *po = oa->po;
+  orta nf;
+  u32 i;
+
+  struct ospf_lsa_rt *rt = en->lsa_body;
+  struct ospf_lsa_rt_link *rr = (struct ospf_lsa_rt_link *) (rt + 1);
+
+  for (i = 0; i < lsa_rt_count(&en->lsa); i++)
+    {
+      struct ospf_lsa_rt_link *rtl = rr + i;
+      struct top_hash_entry *tmp = NULL;
+
+      DBG("     Working on link: %R (type: %u)  ", rtl->id, rtl->type);
+      switch (rtl->type)
 	{
+#ifdef OSPFv2
 	case LSART_STUB:
 	  /*
-	   * This violates rfc2328! but I hope
-	   * it's also correct.
+	   * This violates rfc2328! But it is mostly harmless.
 	   */
 	  DBG("\n");
 
 	  nf.type = RTS_OSPF;
-	  nf.capa = 0;
+	  nf.options = 0;
 	  nf.metric1 = act->dist + rtl->metric;
 	  nf.metric2 = LSINFINITY;
 	  nf.tag = 0;
@@ -228,20 +258,20 @@ ospf_rt_spfa(struct ospf_area *oa)
 	  nf.ifa = act->nhi;
 
 	  if (act == oa->rt)
-	  {
-	    struct ospf_iface *iff;
-
-	    WALK_LIST(iff, po->iface_list)	/* Try to find corresponding interface */
 	    {
-               if (iff->iface && (iff->type != OSPF_IT_VLINK) &&
-	         (rtl->id == (ipa_to_u32(ipa_mkmask(iff->iface->addr->pxlen))
-	         & ipa_to_u32(iff->iface->addr->prefix))))	/* No VLINK and IP must match */
-	       {
-		 nf.ifa = iff;
-	         break;
-	       }
-            }
-	  }
+	      struct ospf_iface *iff;
+
+	      WALK_LIST(iff, po->iface_list)	/* Try to find corresponding interface */
+		{
+		  if (iff->iface && (iff->type != OSPF_IT_VLINK) &&
+		      (rtl->id == (ipa_to_u32(ipa_mkmask(iff->iface->addr->pxlen))
+				   & ipa_to_u32(iff->iface->addr->prefix))))	/* No VLINK and IP must match */
+		    {
+		      nf.ifa = iff;
+		      break;
+		    }
+		}
+	    }
 
 	  if (!nf.ifa)
 	    continue;
@@ -249,9 +279,15 @@ ospf_rt_spfa(struct ospf_area *oa)
 	  ri_install(po, ipa_from_u32(rtl->id),
 		     ipa_mklen(ipa_from_u32(rtl->data)), ORT_NET, &nf, NULL);
 	  break;
+#endif
 
 	case LSART_NET:
-	  tmp = ospf_hash_find(po->gr, oa->areaid, rtl->id, rtl->id, LSA_T_NET);
+#ifdef OSPFv2
+	  /* In OSPFv2, rtl->id is IP addres of DR, Router ID is not known */
+	  tmp = ospf_hash_find_net(po->gr, oa->areaid, rtl->id);
+#else /* OSPFv3 */
+	  tmp = ospf_hash_find(po->gr, oa->areaid, rtl->nif, rtl->id, LSA_T_NET);
+#endif
 	  if (tmp == NULL)
 	    DBG("Not found!\n");
 	  else
@@ -260,39 +296,107 @@ ospf_rt_spfa(struct ospf_area *oa)
 
 	case LSART_VLNK:
 	case LSART_PTP:
-	  tmp = ospf_hash_find(po->gr, oa->areaid, rtl->id, rtl->id, LSA_T_RT);
+	  tmp = ospf_hash_find_rt(po->gr, oa->areaid, rtl->id);
 	  DBG("PTP found.\n");
 	  break;
 	default:
 	  log("Unknown link type in router lsa. (rid = %R)", act->lsa.id);
 	  break;
 	}
-	if (tmp)
-	  DBG("Going to add cand, Mydist: %u, Req: %u\n",
-	      tmp->dist, act->dist + rtl->metric);
-	add_cand(&oa->cand, tmp, act, act->dist + rtl->metric, oa);
-      }
+      if (tmp)
+	DBG("Going to add cand, Mydist: %u, Req: %u\n",
+	    tmp->dist, act->dist + rtl->metric);
+      add_cand(&oa->cand, tmp, act, act->dist + rtl->metric, oa);
+    }
+}
+
+static void
+ospf_rt_spfa(struct ospf_area *oa)
+{
+  struct proto *p = &oa->po->proto;
+  struct proto_ospf *po = oa->po;
+  struct ospf_lsa_rt *rt;
+  struct ospf_lsa_net *ln;
+  struct ospf_iface *iface;
+  struct top_hash_entry *act, *tmp;
+  u32 i, *rts;
+  orta nf;
+  node *n;
+
+  if (oa->rt == NULL)
+    return;
+
+  OSPF_TRACE(D_EVENTS, "Starting routing table calculation for area %R", oa->areaid);
+
+  if (oa->rt->dist != LSINFINITY)
+    bug("Aging was not processed.");
+
+  /* 16.1. (1) */
+  init_list(&oa->cand);		/* Empty list of candidates */
+  oa->trcap = 0;
+
+  DBG("LSA db prepared, adding me into candidate list.\n");
+
+  oa->rt->dist = 0;
+  oa->rt->color = CANDIDATE;
+  add_head(&oa->cand, &oa->rt->cn);
+  DBG("RT LSA: rt: %R, id: %R, type: %u\n",
+      oa->rt->lsa.rt, oa->rt->lsa.id, oa->rt->lsa.type);
+
+  while (!EMPTY_LIST(oa->cand))
+  {
+    n = HEAD(oa->cand);
+    act = SKIP_BACK(struct top_hash_entry, cn, n);
+    rem_node(n);
+
+    DBG("Working on LSA: rt: %R, id: %R, type: %u\n",
+	act->lsa.rt, act->lsa.id, act->lsa.type);
+
+    act->color = INSPF;
+    switch (act->lsa.type)
+    {
+    case LSA_T_RT:
+      rt = (struct ospf_lsa_rt *) act->lsa_body;
+      if (rt->options & OPT_RT_V)
+	oa->trcap = 1;
+
+      /* FIXME - in OSPFv3, should we add all routers, or just ABRs an ASBRs? */
+      if ((rt->options & OPT_RT_V) || (rt->options & OPT_RT_E))
+	{
+	  nf.type = RTS_OSPF;
+	  nf.options = rt->options;
+	  nf.metric1 = act->dist;
+	  nf.metric2 = LSINFINITY;
+	  nf.tag = 0;
+	  nf.oa = oa;
+	  nf.ar = act;
+	  nf.nh = act->nh;
+	  nf.ifa = act->nhi;
+	  ri_install(po, ipa_from_rid(act->lsa.rt), MAX_PREFIX_LENGTH, ORT_ROUTER, &nf, NULL);
+	}
+
+#ifdef OSPFv2
+      ospf_rt_spfa_rtlinks(oa, act, act);
+#else /* OSPFv3 */
+      for (tmp = ospf_hash_find_rt_first(po->gr, act->domain, act->lsa.rt);
+	   tmp; tmp = ospf_hash_find_rt_next(tmp))
+	ospf_rt_spfa_rtlinks(oa, act, tmp);
+#endif
+
       break;
     case LSA_T_NET:
       ln = act->lsa_body;
-      nf.type = RTS_OSPF;
-      nf.capa = 0;
-      nf.metric1 = act->dist;
-      nf.metric2 = LSINFINITY;
-      nf.tag = 0;
-      nf.oa = oa;
-      nf.ar = act;
-      nf.nh = act->nh;
-      nf.ifa = act->nhi;
-      ri_install(po, ipa_and(ipa_from_u32(act->lsa.id), ln->netmask),
-		 ipa_mklen(ln->netmask), ORT_NET, &nf, NULL);
+
+#ifdef OSPFv2
+      add_network(oa, ipa_and(ipa_from_u32(act->lsa.id), ln->netmask),
+		  ipa_mklen(ln->netmask), act->dist, act);
+#endif
 
       rts = (u32 *) (ln + 1);
-      for (i = 0; i < (act->lsa.length - sizeof(struct ospf_lsa_header) -
-		       sizeof(struct ospf_lsa_net)) / sizeof(u32); i++)
+      for (i = 0; i < lsa_net_count(&act->lsa); i++)
       {
 	DBG("     Working on router %R ", rts[i]);
-	tmp = ospf_hash_find(po->gr, oa->areaid, rts[i], rts[i], LSA_T_RT);
+	tmp = ospf_hash_find_rt(po->gr, oa->areaid, rts[i]);
 	if (tmp != NULL)
 	  DBG("Found :-)\n");
 	else
@@ -303,13 +407,17 @@ ospf_rt_spfa(struct ospf_area *oa)
     }
   }
 
+#ifdef OSPFv3
+  process_prefixes(oa);
+#endif
+
   /* Find new/lost VLINK peers */
   WALK_LIST(iface, po->iface_list)
   {
     if ((iface->type == OSPF_IT_VLINK) && (iface->voa == oa))
     {
-      if ((tmp = ospf_hash_find(po->gr, oa->areaid, iface->vid, iface->vid, LSA_T_RT)) &&
-        (!ipa_equal(tmp->lb, IPA_NONE)))
+      if ((tmp = ospf_hash_find_rt(po->gr, oa->areaid, iface->vid)) &&
+	  (!ipa_equal(tmp->lb, IPA_NONE)))
       {
         if ((iface->state != OSPF_IS_PTP) || (iface->iface != tmp->nhi->iface) || (!ipa_equal(iface->vip, tmp->lb)))
         {
@@ -332,6 +440,7 @@ ospf_rt_spfa(struct ospf_area *oa)
   }
 }
 
+#if 0
 static int
 link_back(struct ospf_area *oa, struct top_hash_entry *fol, struct top_hash_entry *pre)
 {
@@ -348,7 +457,7 @@ link_back(struct ospf_area *oa, struct top_hash_entry *fol, struct top_hash_entr
     case LSA_T_RT:
       rt = (struct ospf_lsa_rt *) fol->lsa_body;
       rr = (struct ospf_lsa_rt_link *) (rt + 1);
-      for (i = 0; i < rt->links; i++)
+      for (i = 0; i < lsa_rt_count(&fol->lsa); i++)
       {
 	rtl = (rr + i);
 	switch (rtl->type)
@@ -379,8 +488,7 @@ link_back(struct ospf_area *oa, struct top_hash_entry *fol, struct top_hash_entr
     case LSA_T_NET:
       ln = fol->lsa_body;
       rts = (u32 *) (ln + 1);
-      for (i = 0; i < (fol->lsa.length - sizeof(struct ospf_lsa_header) -
-		       sizeof(struct ospf_lsa_net)) / sizeof(u32); i++)
+      for (i = 0; i < lsa_net_count(&fol->lsa); i++)
       {
 	if (ospf_hash_find(po->gr, oa->areaid, *(rts + i), *(rts + i), LSA_T_RT) == pre)
         {
@@ -393,6 +501,7 @@ link_back(struct ospf_area *oa, struct top_hash_entry *fol, struct top_hash_entr
   }
   return 0;
 }
+#endif
 
 static void
 ospf_rt_sum_tr(struct ospf_area *oa)
@@ -400,10 +509,10 @@ ospf_rt_sum_tr(struct ospf_area *oa)
   struct proto *p = &oa->po->proto;
   struct proto_ospf *po = oa->po;
   struct ospf_area *bb = po->backbone;
-  ip_addr *mask, ip, abrip;
+  ip_addr ip, abrip;
   struct top_hash_entry *en;
-  int mlen = -1, type = -1;
-  union ospf_lsa_sum_tm *tm;
+  u32 dst_rid, metric, options;
+  int pxlen = -1, type = -1;
   ort *re = NULL, *abr;
   orta nf;
 
@@ -411,57 +520,82 @@ ospf_rt_sum_tr(struct ospf_area *oa)
 
   WALK_SLIST(en, po->lsal)
   {
-    if (en->oa != oa)
+    if ((en->lsa.type != LSA_T_SUM_RT) && (en->lsa.type != LSA_T_SUM_NET))
+      continue;
+
+    if (en->domain != oa->areaid)
       continue;
+
     if (en->lsa.age == LSA_MAXAGE)
       continue;
+
     if (en->dist == LSINFINITY)
       continue;
 
     if (en->lsa.rt == p->cf->global->router_id)
       continue;
 
-    if ((en->lsa.type != LSA_T_SUM_RT) && (en->lsa.type != LSA_T_SUM_NET))
-      continue;
-
-    mask = (ip_addr *)en->lsa_body;
 
     if (en->lsa.type == LSA_T_SUM_NET)
     {
-      mlen = ipa_mklen(*mask);
-      ip = ipa_and(ipa_from_u32(en->lsa.id), *mask);
+#ifdef OSPFv2
+      struct ospf_lsa_sum *ls = en->lsa_body;
+      pxlen = ipa_mklen(ls->netmask);
+      ip = ipa_and(ipa_from_u32(en->lsa.id), ls->netmask);
+#else /* OSPFv3 */
+      u8 pxopts;
+      u16 rest;
+      struct ospf_lsa_sum_net *ls = en->lsa_body;
+      lsa_get_ipv6_prefix(ls->prefix, &ip, &pxlen, &pxopts, &rest);
+
+      if (pxopts & OPT_PX_NU)
+	continue;
+#endif
+
+      metric = ls->metric & METRIC_MASK;
+      options = 0;
       type = ORT_NET;
-      re = (ort *) fib_find(&po->rtf, &ip, 32);
+      re = (ort *) fib_find(&po->rtf, &ip, pxlen);
     }
-
-    if (en->lsa.type == LSA_T_SUM_RT)
+    else if (en->lsa.type == LSA_T_SUM_RT)
     {
-      ip = ipa_from_u32(en->lsa.id);
-      mlen = 32;
+#ifdef OSPFv2
+      struct ospf_lsa_sum *ls = en->lsa_body;
+      dst_rid = en->lsa.id;
+      options = 0;
+#else /* OSPFv3 */
+      struct ospf_lsa_sum_rt *ls = en->lsa_body;
+      dst_rid = ls->drid; 
+      options = ls->options & OPTIONS_MASK;
+#endif
+
+      ip = ipa_from_rid(dst_rid);
+      pxlen = MAX_PREFIX_LENGTH;
+      metric = ls->metric & METRIC_MASK;
+      options |= ORTA_ASBR;
       type = ORT_ROUTER;
-      re = (ort *) fib_find(&bb->rtr, &ip, 32);
+      re = (ort *) fib_find(&bb->rtr, &ip, pxlen);
     }
+
     if (!re) continue;
     if (re->n.oa->areaid != 0) continue;
     if ((re->n.type != RTS_OSPF) && (re->n.type != RTS_OSPF_IA)) continue;
 
-    abrip = ipa_from_u32(en->lsa.rt);
+    abrip = ipa_from_rid(en->lsa.rt);
 
-    abr = fib_find(&oa->rtr, &abrip, 32);
+    abr = fib_find(&oa->rtr, &abrip, MAX_PREFIX_LENGTH);
     if (!abr) continue;
 
-    tm = (union ospf_lsa_sum_tm *)(mask + 1);
-
     nf.type = re->n.type;
-    nf.capa = ORTA_ASBR;
-    nf.metric1 = abr->n.metric1 + (tm->metric & METRIC_MASK);
+    nf.options = options;
+    nf.metric1 = abr->n.metric1 + metric;
     nf.metric2 = LSINFINITY;
     nf.tag = 0;
     nf.oa = oa;
     nf.ar = abr->n.ar;
     nf.nh = abr->n.nh;
     nf.ifa = abr->n.ifa;
-    ri_install(po, ip, mlen, type, &nf, NULL);
+    ri_install(po, ip, pxlen, type, &nf, NULL);
   }
 }
   
@@ -472,76 +606,105 @@ ospf_rt_sum(struct ospf_area *oa)
   struct proto_ospf *po = oa->po;
   struct proto *p = &po->proto;
   struct top_hash_entry *en;
-  ip_addr *mask, ip, abrip;	/* abrIP is actually ID */
+  ip_addr ip, abrip;	/* abrIP is actually ID */
+  u32 dst_rid, metric, options;
   struct area_net *anet;
   orta nf;
   ort *abr;
-  int mlen = -1, type = -1;
-  union ospf_lsa_sum_tm *tm;
+  int pxlen = -1, type = -1;
 
   OSPF_TRACE(D_EVENTS, "Starting routing table calculation for inter-area (area %R)", oa->areaid);
 
   WALK_SLIST(en, po->lsal)
   {
-    if (en->oa != oa)
+    if ((en->lsa.type != LSA_T_SUM_RT) && (en->lsa.type != LSA_T_SUM_NET))
       continue;
+
+    if (en->domain != oa->areaid)
+      continue;
+
     /* Page 169 (1) */
     if (en->lsa.age == LSA_MAXAGE)
       continue;
+
     /* Page 169 (2) */
     if (en->lsa.rt == p->cf->global->router_id)
       continue;
 
-    if ((en->lsa.type != LSA_T_SUM_RT) && (en->lsa.type != LSA_T_SUM_NET))
-      continue;
-
-    mask = (ip_addr *)en->lsa_body;
-    tm = (union ospf_lsa_sum_tm *)(mask + 1);
-
-    if ((tm->metric & METRIC_MASK) == LSINFINITY)
-      continue;
 
     if (en->lsa.type == LSA_T_SUM_NET)
     {
       struct ospf_area *oaa;
       int skip = 0;
-      mlen = ipa_mklen(*mask);
-      ip = ipa_and(ipa_from_u32(en->lsa.id), *mask);
+
+#ifdef OSPFv2
+      struct ospf_lsa_sum *ls = en->lsa_body;
+      pxlen = ipa_mklen(ls->netmask);
+      ip = ipa_and(ipa_from_u32(en->lsa.id), ls->netmask);
+#else /* OSPFv3 */
+      u8 pxopts;
+      u16 rest;
+      struct ospf_lsa_sum_net *ls = en->lsa_body;
+      lsa_get_ipv6_prefix(ls->prefix, &ip, &pxlen, &pxopts, &rest);
+
+      if (pxopts & OPT_PX_NU)
+	continue;
+#endif
+
+      metric = ls->metric & METRIC_MASK;
+      options = 0;
+      type = ORT_NET;
+
       /* Page 169 (3) */
       WALK_LIST(oaa, po->area_list)
       {
-        if ((anet = fib_find(&oaa->net_fib, &ip, mlen)) && anet->active)
+        if ((anet = fib_find(&oaa->net_fib, &ip, pxlen)) && anet->active)
 	{
 	  skip = 1;
 	  break;
 	}
       }
       if (skip) continue;
-
-      type = ORT_NET;
     }
     else
     {
-      ip = ipa_from_u32(en->lsa.id);
-      mlen = 32;
+#ifdef OSPFv2
+      struct ospf_lsa_sum *ls = en->lsa_body;
+      dst_rid = en->lsa.id;
+      options = 0;
+#else /* OSPFv3 */
+      struct ospf_lsa_sum_rt *ls = en->lsa_body;
+      dst_rid = ls->drid; 
+      options = ls->options & OPTIONS_MASK;
+#endif
+
+      ip = ipa_from_rid(dst_rid);
+      pxlen = MAX_PREFIX_LENGTH;
+      metric = ls->metric & METRIC_MASK;
+      options |= ORTA_ASBR;
       type = ORT_ROUTER;
     }
-    abrip = ipa_from_u32(en->lsa.rt);
 
-    if (!(abr = (ort *) fib_find(&oa->rtr, &abrip, 32))) continue;
+    /* Page 169 (1) */
+    if (metric == LSINFINITY)
+      continue;
+
+    /* Page 169 (4) */
+    abrip = ipa_from_rid(en->lsa.rt);
+    if (!(abr = (ort *) fib_find(&oa->rtr, &abrip, MAX_PREFIX_LENGTH))) continue;
     if (abr->n.metric1 == LSINFINITY) continue;
-    if (!(abr->n.capa & ORTA_ABR)) continue;
+    if (!(abr->n.options & ORTA_ABR)) continue;
 
     nf.type = RTS_OSPF_IA;
-    nf.capa = ORTA_ASBR;
-    nf.metric1 = abr->n.metric1 + (tm->metric & METRIC_MASK);
+    nf.options = options;
+    nf.metric1 = abr->n.metric1 + metric;
     nf.metric2 = LSINFINITY;
     nf.tag = 0;
     nf.oa = oa;
     nf.ar = abr->n.ar;
     nf.nh = abr->n.nh;
     nf.ifa = abr->n.ifa;
-    ri_install(po, ip, mlen, type, &nf, NULL);
+    ri_install(po, ip, pxlen, type, &nf, NULL);
   }
 }
 
@@ -567,7 +730,7 @@ ospf_rt_spf(struct proto_ospf *po)
 
   OSPF_TRACE(D_EVENTS, "Starting routing table calculation");
 
-  /* Invalidate old routing table */
+  /* 16. (1) - Invalidate old routing table */
   FIB_WALK(&po->rtf, nftmp)
   {
     ri = (ort *) nftmp;
@@ -594,9 +757,12 @@ ospf_rt_spf(struct proto_ospf *po)
       anet->metric = 1;
     }
     FIB_WALK_END;
+
+    /* 16. (2) */
     ospf_rt_spfa(oa);
   }
 
+  /* 16. (3) */
   if ((po->areano == 1) || (!po->backbone))
   {
     ospf_rt_sum(HEAD(po->area_list));
@@ -606,6 +772,7 @@ ospf_rt_spf(struct proto_ospf *po)
     ospf_rt_sum(po->backbone);
   }
 
+  /* 16. (4) */
   WALK_LIST(oa, po->area_list)
   {
     if (oa->trcap && (oa->areaid != 0))
@@ -615,6 +782,7 @@ ospf_rt_spf(struct proto_ospf *po)
     }
   }
 
+  /* 16. (5) */
   ospf_ext_spf(po);
 
   rt_sync(po);
@@ -622,13 +790,12 @@ ospf_rt_spf(struct proto_ospf *po)
   po->calcrt = 0;
 }
 
-
 /**
  * ospf_ext_spf - calculate external paths
  * @po: protocol
  *
  * After routing table for any area is calculated, calculation of external
- * path is invoked. This process is described in 16.6 of RFC 2328.
+ * path is invoked. This process is described in 16.4 of RFC 2328.
  * Inter- and Intra-area paths are always prefered over externals.
  */
 static void
@@ -639,54 +806,80 @@ ospf_ext_spf(struct proto_ospf *po)
   struct top_hash_entry *en;
   struct proto *p = &po->proto;
   struct ospf_lsa_ext *le;
-  struct ospf_lsa_ext_tos *lt;
-  int mlen;
-  ip_addr ip, nh, rtid;
+  int pxlen, ebit, rt_fwaddr_valid;
+  ip_addr ip, nh, rtid, rt_fwaddr;
   struct ospf_iface *nhi = NULL;
-  int met1, met2;
+  u32 br_metric, rt_metric, rt_tag;
   neighbor *nn;
   struct ospf_area *atmp;
 
-
   OSPF_TRACE(D_EVENTS, "Starting routing table calculation for ext routes");
 
   WALK_SLIST(en, po->lsal)
   {
+    /* 16.4. (1) */
     if (en->lsa.type != LSA_T_EXT)
       continue;
     if (en->lsa.age == LSA_MAXAGE)
       continue;
+
+    /* 16.4. (2) */
     if (en->lsa.rt == p->cf->global->router_id)
       continue;
 
+    DBG("%s: Working on LSA. ID: %R, RT: %R, Type: %u\n",
+	p->name, en->lsa.id, en->lsa.rt, en->lsa.type);
+
     le = en->lsa_body;
-    lt = (struct ospf_lsa_ext_tos *) (le + 1);
 
-    DBG("%s: Working on LSA. ID: %R, RT: %R, Type: %u, Mask %I\n",
-	p->name, en->lsa.id, en->lsa.rt, en->lsa.type, le->netmask);
+    rt_metric = le->metric & METRIC_MASK;
+    ebit = le->metric & LSA_EXT_EBIT;
 
-    if ((lt->etm.metric & METRIC_MASK) == LSINFINITY)
+    if (rt_metric == LSINFINITY)
       continue;
+
+#ifdef OSPFv2
     ip = ipa_and(ipa_from_u32(en->lsa.id), le->netmask);
-    mlen = ipa_mklen(le->netmask);
-    if ((mlen < 0) || (mlen > 32))
+    pxlen = ipa_mklen(le->netmask);
+    rt_fwaddr = le->fwaddr;
+    rt_fwaddr_valid = !ipa_equal(rt_fwaddr, IPA_NONE);
+    rt_tag = le->tag;
+#else /* OSPFv3 */
+    u8 pxopts;
+    u16 rest;
+    u32 *buf = le->rest;
+    buf = lsa_get_ipv6_prefix(buf, &ip, &pxlen, &pxopts, &rest);
+
+    if (pxopts & OPT_PX_NU)
+      continue;
+
+    rt_fwaddr_valid = le->metric & LSA_EXT_FBIT;
+    if (rt_fwaddr_valid)
+      buf = lsa_get_ipv6_addr(buf, &rt_fwaddr);
+    else 
+      rt_fwaddr = IPA_NONE;
+
+    if (le->metric & LSA_EXT_TBIT)
+      rt_tag = *buf++;
+    else
+      rt_tag = 0;
+#endif
+
+    if (pxlen < 0)
     {
-      log("%s: Invalid mask in LSA. ID: %R, RT: %R, Type: %u, Mask %I",
-	  p->name, en->lsa.id, en->lsa.rt, en->lsa.type, le->netmask);
+      log("%s: Invalid mask in LSA. ID: %R, RT: %R, Type: %u",
+	  p->name, en->lsa.id, en->lsa.rt, en->lsa.type);
       continue;
     }
     nhi = NULL;
     nh = IPA_NONE;
 
-    met1 = LSINFINITY;
-    met2 = LSINFINITY;
-
-    rtid = ipa_from_u32(en->lsa.rt);
-
+    /* 16.4. (3) */
+    rtid = ipa_from_rid(en->lsa.rt);
     nf1 = NULL;
     WALK_LIST(atmp, po->area_list)
     {
-      nfh = fib_find(&atmp->rtr, &rtid, 32);
+      nfh = fib_find(&atmp->rtr, &rtid, MAX_PREFIX_LENGTH);
       if (nfh == NULL) continue;
       if (nf1 == NULL) nf1 = nfh;
       else if (ri_better(po, &nfh->n, NULL, &nf1->n, NULL, po->rfc1583)) nf1 = nfh;
@@ -698,50 +891,29 @@ ospf_ext_spf(struct proto_ospf *po)
     if (nf1->n.metric1 == LSINFINITY)
       continue;			/* distance is INF */
 
-    if (!(nf1->n.capa & ORTA_ASBR))
+    if (!(nf1->n.options & ORTA_ASBR))
       continue;			/* It is not ASBR */
 
-    if (ipa_equal(lt->fwaddr, IPA_NONE))
+    if (!rt_fwaddr_valid)
     {
-      if (lt->etm.etos.ebit)
-      {				/* FW address == 0 */
-	met1 = nf1->n.metric1;
-	met2 = (lt->etm.metric & METRIC_MASK);
-      }
-      else
-      {
-	met1 = nf1->n.metric1 + (lt->etm.metric & METRIC_MASK);
-	met2 = LSINFINITY;
-      }
-
       nh = nf1->n.nh;
       nhi = nf1->n.ifa;
       nfh = nf1;
+      br_metric = nf1->n.metric1;
     }
     else
-    {				/* FW address !=0 */
-      nf2 = fib_route(&po->rtf, lt->fwaddr, 32);
+    {
+      nf2 = fib_route(&po->rtf, rt_fwaddr, MAX_PREFIX_LENGTH);
 
       if (!nf2)
       {
-	DBG("Cannot find network route (GW=%I)\n", lt->fwaddr);
+	DBG("Cannot find network route (GW=%I)\n", rt_fwaddr);
 	continue;
       }
 
-      if (lt->etm.etos.ebit)
-      {
-	met1 = nf2->n.metric1;
-	met2 = (lt->etm.metric & METRIC_MASK);
-      }
-      else
-      {
-	met1 = nf2->n.metric1 + (lt->etm.metric & METRIC_MASK);
-	met2 = LSINFINITY;
-      }
-
-      if ((nn = neigh_find(p, &lt->fwaddr, 0)) != NULL)
+      if ((nn = neigh_find(p, &rt_fwaddr, 0)) != NULL)
       {
-	nh = lt->fwaddr;
+	nh = rt_fwaddr;
 	nhi = ospf_iface_find(po, nn->iface);
       }
       else
@@ -750,20 +922,31 @@ ospf_ext_spf(struct proto_ospf *po)
 	nhi = nf2->n.ifa;
       }
 
-      if (nf2->n.metric1 == LSINFINITY)
+      br_metric = nf2->n.metric1;
+      if (br_metric == LSINFINITY)
         continue;			/* distance is INF */
     }
 
-    nfa.type = (met2 == LSINFINITY) ? RTS_OSPF_EXT1 : RTS_OSPF_EXT2;
-    nfa.capa = 0;
-    nfa.metric1 = met1;
-    nfa.metric2 = met2;
-    nfa.tag = lt->tag;
+    if (ebit)
+    {
+      nfa.type = RTS_OSPF_EXT2;
+      nfa.metric1 = br_metric;
+      nfa.metric2 = rt_metric;
+    }
+    else
+    {
+      nfa.type = RTS_OSPF_EXT1;
+      nfa.metric1 = br_metric + rt_metric;
+      nfa.metric2 = LSINFINITY;
+    }
+
+    nfa.options = 0;
+    nfa.tag = rt_tag;
     nfa.oa = (po->backbone == NULL) ? HEAD(po->area_list) : po->backbone;
     nfa.ar = nf1->n.ar;
     nfa.nh = nh;
     nfa.ifa = nhi;
-    ri_install(po, ip, mlen, ORT_NET, &nfa, nfh);
+    ri_install(po, ip, pxlen, ORT_NET, &nfa, nfh);
   }
 
 }
@@ -771,20 +954,32 @@ ospf_ext_spf(struct proto_ospf *po)
 /* Add LSA into list of candidates in Dijkstra's algorithm */
 static void
 add_cand(list * l, struct top_hash_entry *en, struct top_hash_entry *par,
-	 u16 dist, struct ospf_area *oa)
+	 u32 dist, struct ospf_area *oa)
 {
   node *prev, *n;
   int added = 0;
   struct top_hash_entry *act;
 
+  /* 16.1. (2b) */
   if (en == NULL)
     return;
   if (en->lsa.age == LSA_MAXAGE)
     return;
 
+#ifdef OSPFv3
+  if (en->lsa.type == LSA_T_RT)
+    {
+      struct ospf_lsa_rt *rt = en->lsa_body;
+      if (!(rt->options & OPT_V6) || !(rt->options & OPT_R))
+	return;
+    }
+#endif
+
+  /* 16.1. (2c) */
   if (en->color == INSPF)
     return;
 
+  /* 16.1. (2d) */
   if (dist >= en->dist)
     return;
   /*
@@ -792,16 +987,15 @@ add_cand(list * l, struct top_hash_entry *en, struct top_hash_entry *par,
    * next hops. I'll start as soon as nest will
    */
 
+  /* FIXME - fix link_back()
   if (!link_back(oa, en, par))
     return;
+  */
 
   DBG("     Adding candidate: rt: %R, id: %R, type: %u\n",
       en->lsa.rt, en->lsa.id, en->lsa.type);
 
-  en->nhi = NULL;
-  en->nh = IPA_NONE;
-
-  calc_next_hop(en, par, oa);
+  calc_next_hop(oa, en, par);
 
   if (!en->nhi)
     return;			/* We cannot find next hop, ignore it */
@@ -826,6 +1020,7 @@ add_cand(list * l, struct top_hash_entry *en, struct top_hash_entry *par,
       act = SKIP_BACK(struct top_hash_entry, cn, n);
       if ((act->dist > dist) ||
 	  ((act->dist == dist) && (act->lsa.type == LSA_T_NET)))
+      /* FIXME - shouldn't be here LSA_T_RT ??? */
       {
 	if (prev == NULL)
 	  add_head(l, &en->cn);
@@ -844,71 +1039,74 @@ add_cand(list * l, struct top_hash_entry *en, struct top_hash_entry *par,
   }
 }
 
+
+static inline int
+match_dr(struct ospf_iface *ifa, struct top_hash_entry *en)
+{
+#ifdef OSPFv2
+  return (ifa->drid == en->lsa.rt) && (ipa_to_u32(ifa->drip) == en->lsa.id);
+#else /* OSPFv3 */
+  return (ifa->drid == en->lsa.rt) && (ifa->dr_iface_id == en->lsa.id);
+#endif
+}
+
 static void
-calc_next_hop(struct top_hash_entry *en, struct top_hash_entry *par,
-	      struct ospf_area *oa)
+calc_next_hop(struct ospf_area *oa, struct top_hash_entry *en,
+	      struct top_hash_entry *par)
 {
   struct ospf_neighbor *neigh;
   struct proto *p = &oa->po->proto;
   struct proto_ospf *po = oa->po;
   struct ospf_iface *ifa;
-  u32 myrid = p->cf->global->router_id;
 
+  en->nhi = NULL;
+  en->nh = IPA_NONE;
+
+  /* 16.1.1. The next hop calculation */
   DBG("     Next hop called.\n");
   if (ipa_equal(par->nh, IPA_NONE))
   {
-    neighbor *nn;
     DBG("     Next hop calculating for id: %R rt: %R type: %u\n",
 	en->lsa.id, en->lsa.rt, en->lsa.type);
 
+    /* The parent vertex is the root */
     if (par == oa->rt)
     {
       if (en->lsa.type == LSA_T_NET)
       {
-	if (en->lsa.rt == myrid)
-	{
-	  WALK_LIST(ifa, po->iface_list)
-	    if (ifa->iface && (ipa_compare
-		(ifa->iface->addr->ip, ipa_from_u32(en->lsa.id)) == 0))
+	WALK_LIST(ifa, po->iface_list)
+	  if (match_dr(ifa, en))
 	  {
-	    en->nhi = ifa;
-	    return;
+	      en->nhi = ifa;
+	      return;
 	  }
-	  log(L_ERR "I didn't find interface for my self originated LSA!\n");
-	  /* This could sometimes happen */
-	  return;
-	}
-	else
-	{
-	  ip_addr ip = ipa_from_u32(en->lsa.id);
-	  nn = neigh_find(p, &ip, 0);
-	  if (nn)
-	    en->nhi = ospf_iface_find(po, nn->iface);
-	  return;
-	}
+	return;
       }
       else
       {
 	if ((neigh = find_neigh_noifa(po, en->lsa.rt)) == NULL)
 	  return;
 	en->nhi = neigh->ifa;
-	if (ipa_equal(en->nh, IPA_NONE))
-	  en->nh = neigh->ip;	/* Yes, neighbor is it's
-				 * own next hop */
+	en->nh = neigh->ip;
+	/* Yes, neighbor is it's own next hop */
 	return;
       }
     }
+
+    /* The parent vertex is a network that directly connects the
+       calculating router to the destination router. */
     if (par->lsa.type == LSA_T_NET)
     {
       if (en->lsa.type == LSA_T_NET)
 	bug("Parent for net is net?");
       if ((en->nhi = par->nhi) == NULL)
 	bug("Did not find next hop interface for INSPF lsa!");
+
       if ((neigh = find_neigh_noifa(po, en->lsa.rt)) == NULL)
 	return;
       en->nhi = neigh->ifa;
-      en->nh = neigh->ip;	/* Yes, neighbor is it's own
-				 * next hop */
+      en->nh = neigh->ip;
+      /* Yes, neighbor is it's own next hop */
       return;
     }
     else
@@ -919,8 +1117,8 @@ calc_next_hop(struct top_hash_entry *en, struct top_hash_entry *par,
       return;
     }
   }
-  en->nh = par->nh;
   en->nhi = par->nhi;
+  en->nh = par->nh;
   DBG("     Next hop calculated: %I.\n", en->nh);
 }
 
@@ -963,18 +1161,18 @@ again1:
       if (nf->n.ifa) a0.iface = nf->n.ifa->iface;
       a0.gw = nf->n.nh;
 
-      if ((!ipa_equal(nf->n.nh, IPA_NONE)) && (!neigh_find(p, &nf->n.nh, 0)))
+      if (ipa_nonzero(nf->n.nh) && (!neigh_find2(p, &nf->n.nh, nf->n.ifa->iface, 0)))
       {
         int found = 0;
         struct ospf_iface *ifa;
         struct top_hash_entry *en;
-        OSPF_TRACE(D_EVENTS, "Trying to find correct next hop");
+        OSPF_TRACE(D_EVENTS, "Trying to find correct next hop %I/%d via %I", nf->fn.prefix, nf->fn.pxlen, nf->n.nh);
         WALK_LIST(ifa, po->iface_list)
         {
           if ((ifa->type == OSPF_IT_VLINK) && ipa_equal(ifa->vip, nf->n.nh))
           {
-            if ((en = ospf_hash_find(po->gr, ifa->voa->areaid, ifa->vid, ifa->vid, LSA_T_RT))
-	      && (!ipa_equal(en->nh, IPA_NONE)))
+            if ((en = ospf_hash_find_rt(po->gr, ifa->voa->areaid, ifa->vid))
+		&& (!ipa_equal(en->nh, IPA_NONE)))
             {
               a0.gw = en->nh;
               found = 1;
@@ -1054,7 +1252,7 @@ again2:
 	if (oaa->stub) fl = 1;
 
         if (fl) flush_sum_lsa(oaa, &anet->fn, ORT_NET);
-        else originate_sum_lsa(oaa, &anet->fn, ORT_NET, anet->metric);
+        else originate_sum_lsa(oaa, &anet->fn, ORT_NET, anet->metric, 0);
       }
     }
     FIB_WALK_END;
@@ -1067,7 +1265,7 @@ again2:
 
       fnn.prefix = IPA_NONE;
       fnn.pxlen = 0;
-      if (oa->stub) originate_sum_lsa(oa, &fnn, ORT_NET, oa->stub);
+      if (oa->stub) originate_sum_lsa(oa, &fnn, ORT_NET, oa->stub, 0);
       else flush_sum_lsa(oa, &fnn, ORT_NET);
     }
   }