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-rw-r--r--proto/ospf/rt.c704
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);
}
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-29 17:56:24 +0200