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RIP: convert the rte-local attributes to extended attributes

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This commit is contained in:
Maria Matejka 2021-09-14 20:12:33 +02:00
parent 6e13df70fd
commit a0e4c66404
3 changed files with 37 additions and 43 deletions
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7
nest/route.h
View File

@ -244,13 +244,6 @@ typedef struct rte {
byte pflags; /* Protocol-specific flags */
btime lastmod; /* Last modified */
union { /* Protocol-dependent data (metrics etc.) */
#ifdef CONFIG_RIP
struct {
struct iface *from; /* Incoming iface */
u8 metric; /* RIP metric */
u16 tag; /* External route tag */
} rip;
#endif
#ifdef CONFIG_OSPF
struct {
u32 metric1, metric2; /* OSPF Type 1 and Type 2 metrics */

72
proto/rip/rip.c
View File

@ -188,12 +188,28 @@ rip_announce_rte(struct rip_proto *p, struct rip_entry *en)
a0.nh.iface = rt->from->ifa->iface;
}
a0.eattrs = alloca(sizeof(ea_list) + 3*sizeof(eattr));
memset(a0.eattrs, 0, sizeof(ea_list)); /* Zero-ing only the ea_list header */
a0.eattrs->count = 3;
a0.eattrs->attrs[0] = (eattr) {
.id = EA_RIP_METRIC,
.type = EAF_TYPE_INT,
.u.data = rt_metric,
};
a0.eattrs->attrs[1] = (eattr) {
.id = EA_RIP_TAG,
.type = EAF_TYPE_INT,
.u.data = rt_tag,
};
a0.eattrs->attrs[2] = (eattr) {
.id = EA_RIP_FROM,
.type = EAF_TYPE_PTR,
.u.data = (uintptr_t) a0.nh.iface,
};
rta *a = rta_lookup(&a0);
rte *e = rte_get_temp(a, p->p.main_source);
e->u.rip.from = a0.nh.iface;
e->u.rip.metric = rt_metric;
e->u.rip.tag = rt_tag;
e->pflags = EA_ID_FLAG(EA_RIP_METRIC) | EA_ID_FLAG(EA_RIP_TAG);
rte_update(&p->p, en->n.addr, e);
@ -307,8 +323,9 @@ rip_rt_notify(struct proto *P, struct channel *ch UNUSED, struct network *net, s
if (new)
{
/* Update */
u32 rt_metric = ea_get_int(new->attrs->eattrs, EA_RIP_METRIC, 1);
u32 rt_tag = ea_get_int(new->attrs->eattrs, EA_RIP_TAG, 0);
u32 rt_metric = ea_get_int(new->attrs->eattrs, EA_RIP_METRIC, 1);
struct iface *rt_from = (struct iface *) ea_get_int(new->attrs->eattrs, EA_RIP_FROM, 0);
if (rt_metric > p->infinity)
{
@ -339,7 +356,7 @@ rip_rt_notify(struct proto *P, struct channel *ch UNUSED, struct network *net, s
en->valid = RIP_ENTRY_VALID;
en->metric = rt_metric;
en->tag = rt_tag;
en->from = (new->src->proto == P) ? new->u.rip.from : NULL;
en->from = (new->src->proto == P) ? rt_from : NULL;
en->iface = new->attrs->nh.iface;
en->next_hop = new->attrs->nh.gw;
}
@ -1068,40 +1085,22 @@ rip_reload_routes(struct channel *C)
rip_kick_timer(p);
}
static void
rip_make_tmp_attrs(struct rte *rt, struct linpool *pool)
{
rte_init_tmp_attrs(rt, pool, 2);
rte_make_tmp_attr(rt, EA_RIP_METRIC, EAF_TYPE_INT, rt->u.rip.metric);
rte_make_tmp_attr(rt, EA_RIP_TAG, EAF_TYPE_INT, rt->u.rip.tag);
}
static void
rip_store_tmp_attrs(struct rte *rt, struct linpool *pool)
{
rte_init_tmp_attrs(rt, pool, 2);
rt->u.rip.metric = rte_store_tmp_attr(rt, EA_RIP_METRIC);
rt->u.rip.tag = rte_store_tmp_attr(rt, EA_RIP_TAG);
}
static int
rip_rte_better(struct rte *new, struct rte *old)
{
return new->u.rip.metric < old->u.rip.metric;
}
ASSERT_DIE(new->src == old->src);
struct rip_proto *p = (struct rip_proto *) new->src->proto;
static int
rip_rte_same(struct rte *new, struct rte *old)
{
return ((new->u.rip.metric == old->u.rip.metric) &&
(new->u.rip.tag == old->u.rip.tag) &&
(new->u.rip.from == old->u.rip.from));
u32 new_metric = ea_get_int(new->attrs->eattrs, EA_RIP_METRIC, p->infinity);
u32 old_metric = ea_get_int(old->attrs->eattrs, EA_RIP_METRIC, p->infinity);
return new_metric < old_metric;
}
static u32
rip_rte_igp_metric(struct rte *rt)
{
return rt->u.rip.metric;
return ea_get_int(rt->attrs->eattrs, EA_RIP_METRIC, IGP_METRIC_UNKNOWN);
}
static void
@ -1125,10 +1124,7 @@ rip_init(struct proto_config *CF)
P->rt_notify = rip_rt_notify;
P->neigh_notify = rip_neigh_notify;
P->reload_routes = rip_reload_routes;
P->make_tmp_attrs = rip_make_tmp_attrs;
P->store_tmp_attrs = rip_store_tmp_attrs;
P->rte_better = rip_rte_better;
P->rte_same = rip_rte_same;
P->rte_igp_metric = rip_rte_igp_metric;
return P;
@ -1204,10 +1200,14 @@ rip_reconfigure(struct proto *P, struct proto_config *CF)
static void
rip_get_route_info(rte *rte, byte *buf)
{
buf += bsprintf(buf, " (%d/%d)", rte->attrs->pref, rte->u.rip.metric);
struct rip_proto *p = (struct rip_proto *) rte->src->proto;
u32 rt_metric = ea_get_int(rte->attrs->eattrs, EA_RIP_METRIC, p->infinity);
u32 rt_tag = ea_get_int(rte->attrs->eattrs, EA_RIP_TAG, 0);
if (rte->u.rip.tag)
bsprintf(buf, " [%04x]", rte->u.rip.tag);
buf += bsprintf(buf, " (%d/%d)", rte->attrs->pref, rt_metric);
if (rt_tag)
bsprintf(buf, " [%04x]", rt_tag);
}
static int

1
proto/rip/rip.h
View File

@ -197,6 +197,7 @@ struct rip_rte
#define EA_RIP_METRIC EA_CODE(PROTOCOL_RIP, 0)
#define EA_RIP_TAG EA_CODE(PROTOCOL_RIP, 1)
#define EA_RIP_FROM EA_CODE(PROTOCOL_RIP, 2)
static inline int rip_is_v2(struct rip_proto *p)
{ return p->rip2; }