mirror of
https://gitlab.nic.cz/labs/bird.git
synced 2024-11-08 12:18:42 +00:00
Static: Multicast route support
This commit is contained in:
Ondrej Zajicek (work)
parent
b04f754d86
commit
df99c22687
@ -55,6 +55,7 @@ static_proto_start: proto_start STATIC
|
||||
{
|
||||
this_proto = proto_config_new(&proto_static, $1);
|
||||
init_list(&STATIC_CFG->routes);
|
||||
init_list(&STATIC_CFG->mifs);
|
||||
};
|
||||
|
||||
static_proto:
|
||||
@ -104,6 +105,23 @@ stat_nexthops:
|
||||
| stat_nexthops stat_nexthop
|
||||
;
|
||||
|
||||
stat_mif: TEXT { static_cfg_add_mif(STATIC_CFG, $1); } ;
|
||||
|
||||
stat_mifs:
|
||||
stat_mif
|
||||
| stat_mifs stat_mif
|
||||
;
|
||||
|
||||
stat_mcast_opt:
|
||||
FROM stat_mifs { static_cfg_flush_mifs(STATIC_CFG, &this_srt->from, &this_srt->from_len); }
|
||||
| TO stat_mifs { static_cfg_flush_mifs(STATIC_CFG, &this_srt->to, &this_srt->to_len); }
|
||||
;
|
||||
|
||||
stat_mcast_opts:
|
||||
stat_mcast_opt
|
||||
| stat_mcast_opts stat_mcast_opt
|
||||
;
|
||||
|
||||
stat_route0: ROUTE net_any {
|
||||
this_srt = cfg_allocz(sizeof(struct static_route));
|
||||
add_tail(&STATIC_CFG->routes, &this_srt->n);
|
||||
@ -131,6 +149,7 @@ stat_route:
|
||||
| stat_route0 BLACKHOLE { this_srt->dest = RTD_BLACKHOLE; }
|
||||
| stat_route0 UNREACHABLE { this_srt->dest = RTD_UNREACHABLE; }
|
||||
| stat_route0 PROHIBIT { this_srt->dest = RTD_PROHIBIT; }
|
||||
| stat_route0 stat_mcast_opts { this_srt->dest = RTD_MULTICAST; }
|
||||
;
|
||||
|
||||
stat_route_item:
|
||||
|
||||
@ -49,6 +49,13 @@
|
||||
|
||||
static linpool *static_lp;
|
||||
|
||||
static inline int static_is_mcast(struct static_proto *p)
|
||||
{ return (p->p.net_type == NET_MGRP4) || (p->p.net_type == NET_MGRP6); }
|
||||
|
||||
static inline int static_cfg_is_mcast(struct static_config *cf)
|
||||
{ return (cf->c.net_type == NET_MGRP4) || (cf->c.net_type == NET_MGRP6); }
|
||||
|
||||
|
||||
static void
|
||||
static_announce_rte(struct static_proto *p, struct static_route *r)
|
||||
{
|
||||
@ -94,6 +101,15 @@ static_announce_rte(struct static_proto *p, struct static_route *r)
|
||||
rta_set_recursive_next_hop(p->p.main_channel->table, a, tab, r->via, IPA_NONE, r->mls);
|
||||
}
|
||||
|
||||
if (r->dest == RTD_MULTICAST)
|
||||
{
|
||||
if (!r->iifs || !r->oifs)
|
||||
goto withdraw;
|
||||
|
||||
rta_set_iifs(a, r->iifs);
|
||||
rta_set_oifs(a, r->oifs);
|
||||
}
|
||||
|
||||
/* Already announced */
|
||||
if (r->state == SRS_CLEAN)
|
||||
return;
|
||||
@ -195,6 +211,53 @@ fail:
|
||||
return old_active;
|
||||
}
|
||||
|
||||
static int
|
||||
static_decide_mif(struct static_proto *p, struct static_mif *mif)
|
||||
{
|
||||
struct static_config *cf = (void *) p->p.cf;
|
||||
uint old_active = mif->active;
|
||||
|
||||
if (mif->nbr->scope < 0)
|
||||
goto fail;
|
||||
|
||||
if (cf->check_link && !(mif->nbr->iface->flags & IF_LINK_UP))
|
||||
goto fail;
|
||||
|
||||
mif->active = 1;
|
||||
return !old_active;
|
||||
|
||||
fail:
|
||||
mif->active = 0;
|
||||
return old_active;
|
||||
|
||||
}
|
||||
|
||||
static int
|
||||
static_decide_mc(struct static_proto *p UNUSED, struct static_route *r)
|
||||
{
|
||||
/* The @r is a RTD_MULTICAST next hop */
|
||||
|
||||
u32 old_iifs = r->iifs;
|
||||
u32 old_oifs = r->oifs;
|
||||
u32 iifs = 0, oifs = 0;
|
||||
|
||||
WALK_ARRAY(r->from, r->from_len, mif)
|
||||
if (mif->active)
|
||||
MIFS_SET(mif->mif, iifs);
|
||||
|
||||
WALK_ARRAY(r->to, r->to_len, mif)
|
||||
if (mif->active)
|
||||
MIFS_SET(mif->mif, oifs);
|
||||
|
||||
if (!iifs || !oifs)
|
||||
iifs = oifs = 0;
|
||||
|
||||
r->iifs = iifs;
|
||||
r->oifs = oifs;
|
||||
return (r->iifs != old_iifs) || (r->oifs != old_oifs);
|
||||
}
|
||||
|
||||
|
||||
static void
|
||||
static_add_rte(struct static_proto *p, struct static_route *r)
|
||||
{
|
||||
@ -225,6 +288,9 @@ static_add_rte(struct static_proto *p, struct static_route *r)
|
||||
}
|
||||
}
|
||||
|
||||
if (r->dest == RTD_MULTICAST)
|
||||
static_decide_mc(p, r);
|
||||
|
||||
static_announce_rte(p, r);
|
||||
}
|
||||
|
||||
@ -300,6 +366,20 @@ static_same_dest(struct static_route *x, struct static_route *y)
|
||||
|
||||
return 1;
|
||||
|
||||
case RTD_MULTICAST:
|
||||
if ((x->from_len != y->from_len) || (x->to_len != y->to_len))
|
||||
return 0;
|
||||
|
||||
for (uint i = 0; i < x->from_len; i++)
|
||||
if (x->from[i]->iface != y->from[i]->iface)
|
||||
return 0;
|
||||
|
||||
for (uint i = 0; i < x->to_len; i++)
|
||||
if (x->to[i]->iface != y->to[i]->iface)
|
||||
return 0;
|
||||
|
||||
return 1;
|
||||
|
||||
default:
|
||||
return 1;
|
||||
}
|
||||
@ -324,6 +404,119 @@ static_reconfigure_rte(struct static_proto *p, struct static_route *or, struct s
|
||||
static_reset_rte(p, or);
|
||||
}
|
||||
|
||||
/* Find or allocate MIF and add it to the MIF stack */
|
||||
void
|
||||
static_cfg_add_mif(struct static_config *cf, char *name)
|
||||
{
|
||||
struct static_mif *mif;
|
||||
|
||||
WALK_LIST(mif, cf->mifs)
|
||||
if (!strcmp(mif->iface->name, name))
|
||||
goto done;
|
||||
|
||||
mif = cfg_allocz(sizeof(struct static_mif));
|
||||
mif->iface = if_get_by_name(name);
|
||||
add_tail(&cf->mifs, &mif->n);
|
||||
|
||||
done:
|
||||
if (!cf->mif_stack.data)
|
||||
BUFFER_INIT(cf->mif_stack, new_config->pool, 4);
|
||||
|
||||
BUFFER_PUSH(cf->mif_stack) = mif;
|
||||
mif->routes.size++;
|
||||
}
|
||||
|
||||
/* Get copy of MIF stack and flush it */
|
||||
|
||||
void
|
||||
static_cfg_flush_mifs(struct static_config *cf, struct static_mif ***buf, u8 *blen)
|
||||
{
|
||||
uint size = cf->mif_stack.used * sizeof(struct static_mif *);
|
||||
|
||||
*buf = cfg_alloc(size);
|
||||
*blen = cf->mif_stack.used;
|
||||
memcpy(*buf, cf->mif_stack.data, size);
|
||||
BUFFER_FLUSH(cf->mif_stack);
|
||||
}
|
||||
|
||||
void
|
||||
static_cfg_finish_mifs(struct static_config *cf)
|
||||
{
|
||||
struct static_route *r;
|
||||
struct static_mif *mif;
|
||||
|
||||
WALK_LIST(mif, cf->mifs)
|
||||
BUFFER_INIT(mif->routes, new_config->pool, mif->routes.size);
|
||||
|
||||
WALK_LIST(r, cf->routes)
|
||||
{
|
||||
WALK_ARRAY(r->from, r->from_len, mif)
|
||||
BUFFER_PUSH(mif->routes) = r;
|
||||
|
||||
WALK_ARRAY(r->to, r->to_len, mif)
|
||||
BUFFER_PUSH(mif->routes) = r;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
void
|
||||
static_register_mifs(struct static_proto *p, struct static_config *cf)
|
||||
{
|
||||
struct static_mif *mif;
|
||||
|
||||
WALK_LIST(mif, cf->mifs)
|
||||
{
|
||||
mif->mif = mif_get(p->mif_group, mif->iface);
|
||||
mif->nbr = neigh_find_iface(&p->p, mif->iface);
|
||||
mif->nbr->data = mif;
|
||||
|
||||
static_decide_mif(p, mif);
|
||||
}
|
||||
}
|
||||
|
||||
void
|
||||
static_unregister_mifs(struct static_proto *p, struct static_config *cf)
|
||||
{
|
||||
struct static_mif *mif;
|
||||
|
||||
WALK_LIST(mif, cf->mifs)
|
||||
{
|
||||
mif->nbr->data = NULL;
|
||||
mif->nbr = NULL;
|
||||
|
||||
mif_free(p->mif_group, mif->mif);
|
||||
mif->mif = NULL;
|
||||
|
||||
mif->active = 0;
|
||||
}
|
||||
}
|
||||
|
||||
void
|
||||
static_reconfigure_mifs(struct static_proto *p, struct static_config *o, struct static_config *n)
|
||||
{
|
||||
struct static_mif *mif;
|
||||
|
||||
/*
|
||||
* Neighbors are not shared, so we first free them from the old config. MIFs
|
||||
* are refcounted and we want to avoid MIF index changes, so we first register
|
||||
* them for the new config and then free them for the old config.
|
||||
*/
|
||||
|
||||
WALK_LIST(mif, o->mifs)
|
||||
{
|
||||
mif->nbr->data = NULL;
|
||||
mif->nbr = NULL;
|
||||
}
|
||||
|
||||
static_register_mifs(p, n);
|
||||
|
||||
WALK_LIST(mif, o->mifs)
|
||||
{
|
||||
mif_free(p->mif_group, mif->mif);
|
||||
mif->mif = NULL;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
static void
|
||||
static_neigh_notify(struct neighbor *n)
|
||||
@ -341,6 +534,18 @@ static_neigh_notify(struct neighbor *n)
|
||||
}
|
||||
}
|
||||
|
||||
static void
|
||||
static_neigh_notify_mc(struct neighbor *n)
|
||||
{
|
||||
struct static_proto *p = (void *) n->proto;
|
||||
struct static_mif *mif = n->data;
|
||||
|
||||
if (static_decide_mif(p, mif))
|
||||
BUFFER_WALK(mif->routes, r)
|
||||
if (static_decide_mc(p, r))
|
||||
static_mark_rte(p, r);
|
||||
}
|
||||
|
||||
static void
|
||||
static_bfd_notify(struct bfd_request *req)
|
||||
{
|
||||
@ -382,6 +587,9 @@ static_postconfig(struct proto_config *CF)
|
||||
WALK_LIST(r, cf->routes)
|
||||
if (r->net && (r->net->type != CF->net_type))
|
||||
cf_error("Route %N incompatible with channel type", r->net);
|
||||
|
||||
if (static_cfg_is_mcast(cf))
|
||||
static_cfg_finish_mifs(cf);
|
||||
}
|
||||
|
||||
static struct proto *
|
||||
@ -393,7 +601,7 @@ static_init(struct proto_config *CF)
|
||||
|
||||
P->main_channel = proto_add_channel(P, proto_cf_main_channel(CF));
|
||||
|
||||
P->neigh_notify = static_neigh_notify;
|
||||
P->neigh_notify = !static_is_mcast(p) ? static_neigh_notify : static_neigh_notify_mc;
|
||||
P->rte_mergable = static_rte_mergable;
|
||||
|
||||
if (cf->igp_table_ip4)
|
||||
@ -402,6 +610,9 @@ static_init(struct proto_config *CF)
|
||||
if (cf->igp_table_ip6)
|
||||
p->igp_table_ip6 = cf->igp_table_ip6->table;
|
||||
|
||||
if (static_is_mcast(p))
|
||||
p->mif_group = global_mif_group;
|
||||
|
||||
return P;
|
||||
}
|
||||
|
||||
@ -430,6 +641,9 @@ static_start(struct proto *P)
|
||||
/* We have to go UP before routes could be installed */
|
||||
proto_notify_state(P, PS_UP);
|
||||
|
||||
if (static_is_mcast(p))
|
||||
static_register_mifs(p, cf);
|
||||
|
||||
WALK_LIST(r, cf->routes)
|
||||
static_add_rte(p, r);
|
||||
|
||||
@ -447,6 +661,9 @@ static_shutdown(struct proto *P)
|
||||
WALK_LIST(r, cf->routes)
|
||||
static_reset_rte(p, r);
|
||||
|
||||
if (static_is_mcast(p))
|
||||
static_unregister_mifs(p, cf);
|
||||
|
||||
return PS_DOWN;
|
||||
}
|
||||
|
||||
@ -513,6 +730,9 @@ static_reconfigure(struct proto *P, struct proto_config *CF)
|
||||
|
||||
p->p.cf = CF;
|
||||
|
||||
if (static_is_mcast(p))
|
||||
static_reconfigure_mifs(p, o, n);
|
||||
|
||||
/* Reset route lists in neighbor entries */
|
||||
WALK_LIST(r, o->routes)
|
||||
for (r2 = r; r2; r2 = r2->mp_next)
|
||||
@ -604,6 +824,29 @@ static_copy_config(struct proto_config *dest, struct proto_config *src)
|
||||
}
|
||||
}
|
||||
|
||||
static void
|
||||
static_show_mifs(char *key, struct static_mif **mifs, int mlen)
|
||||
{
|
||||
uint blen = 512;
|
||||
char *buf = alloca(blen + 8);
|
||||
char *pos = buf;
|
||||
pos[0] = 0;
|
||||
|
||||
WALK_ARRAY(mifs, mlen, mif)
|
||||
{
|
||||
int i = bsnprintf(pos, blen, mif->active ? " %s" : " (%s)", mif->iface->name);
|
||||
if (i < 0)
|
||||
{
|
||||
bsprintf(pos, " ...");
|
||||
break;
|
||||
}
|
||||
|
||||
ADVANCE(pos, blen, i);
|
||||
}
|
||||
|
||||
cli_msg(-1009, "%s%s", key, buf);
|
||||
}
|
||||
|
||||
static void
|
||||
static_show_rt(struct static_route *r)
|
||||
{
|
||||
@ -628,6 +871,12 @@ static_show_rt(struct static_route *r)
|
||||
break;
|
||||
}
|
||||
|
||||
case RTD_MULTICAST:
|
||||
cli_msg(-1009, "%N", r->net);
|
||||
static_show_mifs("\tfrom", r->from, r->from_len);
|
||||
static_show_mifs("\tto", r->to, r->to_len);
|
||||
break;
|
||||
|
||||
case RTD_NONE:
|
||||
case RTD_BLACKHOLE:
|
||||
case RTD_UNREACHABLE:
|
||||
|
||||
@ -19,6 +19,9 @@ struct static_config {
|
||||
int check_link; /* Whether iface link state is used */
|
||||
struct rtable_config *igp_table_ip4; /* Table for recursive IPv4 next hop lookups */
|
||||
struct rtable_config *igp_table_ip6; /* Table for recursive IPv6 next hop lookups */
|
||||
list mifs; /* Multicast ifaces for multicast routes */
|
||||
|
||||
BUFFER_(struct static_mif *) mif_stack; /* MIF stack for parser */
|
||||
};
|
||||
|
||||
struct static_proto {
|
||||
@ -28,12 +31,16 @@ struct static_proto {
|
||||
BUFFER_(struct static_route *) marked; /* Routes marked for reannouncement */
|
||||
rtable *igp_table_ip4; /* Table for recursive IPv4 next hop lookups */
|
||||
rtable *igp_table_ip6; /* Table for recursive IPv6 next hop lookups */
|
||||
struct mif_group *mif_group; /* Associated MIF group for multicast routes */
|
||||
};
|
||||
|
||||
struct static_route {
|
||||
node n;
|
||||
net_addr *net; /* Network we route */
|
||||
ip_addr via; /* Destination router */
|
||||
union {
|
||||
ip_addr via; /* Destination router */
|
||||
struct { u32 iifs, oifs; }; /* Active IIFs and OIFs for multicast routes */
|
||||
};
|
||||
struct iface *iface; /* Destination iface, for link-local vias or device routes */
|
||||
struct neighbor *neigh; /* Associated neighbor entry */
|
||||
struct static_route *chain; /* Next for the same neighbor */
|
||||
@ -46,8 +53,20 @@ struct static_route {
|
||||
byte onlink; /* Gateway is onlink regardless of IP ranges */
|
||||
byte weight; /* Multipath next hop weight */
|
||||
byte use_bfd; /* Configured to use BFD */
|
||||
byte from_len, to_len;
|
||||
struct bfd_request *bfd_req; /* BFD request, if BFD is used */
|
||||
mpls_label_stack *mls; /* MPLS label stack; may be NULL */
|
||||
struct static_mif **from;
|
||||
struct static_mif **to;
|
||||
};
|
||||
|
||||
struct static_mif {
|
||||
node n;
|
||||
struct iface *iface;
|
||||
struct mif *mif;
|
||||
struct neighbor *nbr; /* Associated neighbor entry */
|
||||
BUFFER_(struct static_route *) routes; /* List of routes using this MIF */
|
||||
u8 active;
|
||||
};
|
||||
|
||||
/*
|
||||
@ -66,6 +85,9 @@ struct static_route {
|
||||
#define SRS_CLEAN 1 /* Route is active and announced */
|
||||
#define SRS_DIRTY 2 /* Route changed since announcement */
|
||||
|
||||
void static_cfg_add_mif(struct static_config *cf, char *name);
|
||||
void static_cfg_flush_mifs(struct static_config *cf, struct static_mif ***buf, u8 *blen);
|
||||
|
||||
void static_show(struct proto *);
|
||||
|
||||
#endif
|
||||
|
||||
Loading…
Reference in New Issue
Block a user