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Moved route source attribute (RTS_*) to eattrs

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This commit is contained in:
Maria Matejka 2022-05-04 14:41:51 +02:00
parent 702c04fbef
commit 1c30b689dd
20 changed files with 79 additions and 51 deletions
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3
filter/config.Y
View File

@ -285,7 +285,7 @@ CF_KEYWORDS(FUNCTION, PRINT, PRINTN, UNSET, RETURN,
SET, STRING, BGPMASK, BGPPATH, CLIST, ECLIST, LCLIST,
IF, THEN, ELSE, CASE,
TRUE, FALSE, RT, RO, UNKNOWN, GENERIC,
FROM, GW, NET, MASK, PROTO, SOURCE, SCOPE, DEST, IFNAME, IFINDEX, WEIGHT, GW_MPLS,
FROM, GW, NET, MASK, PROTO, SCOPE, DEST, IFNAME, IFINDEX, WEIGHT, GW_MPLS,
ROA_CHECK, ASN, SRC, DST,
IS_V4, IS_V6,
LEN, MAXLEN,
@ -765,7 +765,6 @@ static_attr:
GW { $$ = f_new_static_attr(T_IP, SA_GW, 0); }
| NET { $$ = f_new_static_attr(T_NET, SA_NET, 1); }
| PROTO { $$ = f_new_static_attr(T_STRING, SA_PROTO, 1); }
| SOURCE { $$ = f_new_static_attr(T_ENUM_RTS, SA_SOURCE, 1); }
| DEST { $$ = f_new_static_attr(T_ENUM_RTD, SA_DEST, 0); }
| IFNAME { $$ = f_new_static_attr(T_STRING, SA_IFNAME, 0); }
| IFINDEX { $$ = f_new_static_attr(T_INT, SA_IFINDEX, 1); }

1
filter/data.h
View File

@ -25,7 +25,6 @@ enum f_sa_code {
SA_GW = 1,
SA_NET,
SA_PROTO,
SA_SOURCE,
SA_DEST,
SA_IFNAME,
SA_IFINDEX,

1
filter/f-inst.c
View File

@ -536,7 +536,6 @@
case SA_GW: RESULT(sa.type, ip, rta->nh.gw); break;
case SA_NET: RESULT(sa.type, net, (*fs->rte)->net->n.addr); break;
case SA_PROTO: RESULT(sa.type, s, (*fs->rte)->src->proto->name); break;
case SA_SOURCE: RESULT(sa.type, i, rta->source); break;
case SA_DEST: RESULT(sa.type, i, rta->dest); break;
case SA_IFNAME: RESULT(sa.type, s, rta->nh.iface ? rta->nh.iface->name : ""); break;
case SA_IFINDEX: RESULT(sa.type, i, rta->nh.iface ? rta->nh.iface->index : 0); break;

12
lib/route.h
View File

@ -85,7 +85,6 @@ typedef struct rta {
struct ea_list *eattrs; /* Extended Attribute chain */
struct hostentry *hostentry; /* Hostentry for recursive next-hops */
u16 cached:1; /* Are attributes cached? */
u16 source:7; /* Route source (RTS_...) */
u16 dest:4; /* Route destination type (RTD_...) */
struct nexthop nh; /* Next hop */
} rta;
@ -131,12 +130,13 @@ static inline int rte_is_reachable(rte *r)
typedef struct eattr {
word id; /* EA_CODE(PROTOCOL_..., protocol-dependent ID) */
byte flags; /* Protocol-dependent flags */
byte type:5; /* Attribute type */
byte type; /* Attribute type */
byte rfu:5;
byte originated:1; /* The attribute has originated locally */
byte fresh:1; /* An uncached attribute (e.g. modified in export filter) */
byte undef:1; /* Explicitly undefined */
PADDING(unused, 0, 4);
PADDING(unused, 3, 3);
union bval u;
} eattr;
@ -308,6 +308,12 @@ u32 rt_get_igp_metric(rte *rt);
/* From: Advertising router */
extern struct ea_class ea_gen_from;
/* Source: An old method to devise the route source protocol and kind.
* To be superseded in a near future by something more informative. */
extern struct ea_class ea_gen_source;
static inline u32 rt_get_source_attr(rte *rt)
{ return ea_get_int(rt->attrs->eattrs, &ea_gen_source, 0); }
/* Next hop structures */
#define NEXTHOP_MAX_SIZE (sizeof(struct nexthop) + sizeof(u32)*MPLS_MAX_LABEL_STACK)

1
lib/type_test.c
View File

@ -54,6 +54,7 @@ t_eattr(void)
e.id = ~0;
e.flags = ~0;
e.type = ~0;
e.rfu = ~0;
e.originated = ~0;
e.fresh = ~0;
e.undef = ~0;

32
nest/rt-attr.c
View File

@ -92,6 +92,22 @@ const char * const rta_src_names[RTS_MAX] = {
[RTS_RPKI] = "RPKI",
};
static void
ea_gen_source_format(const eattr *a, byte *buf, uint size)
{
if ((a->u.data >= RTS_MAX) || !rta_src_names[a->u.data])
bsnprintf(buf, size, "unknown");
else
bsnprintf(buf, size, "%s", rta_src_names[a->u.data]);
}
struct ea_class ea_gen_source = {
.name = "source",
.type = T_ENUM_RTS,
.readonly = 1,
.format = ea_gen_source_format,
};
const char * rta_dest_names[RTD_MAX] = {
[RTD_NONE] = "",
[RTD_UNICAST] = "unicast",
@ -1234,7 +1250,6 @@ rta_hash(rta *a)
#define MIX(f) mem_hash_mix(&h, &(a->f), sizeof(a->f));
#define BMIX(f) mem_hash_mix_num(&h, a->f);
MIX(hostentry);
BMIX(source);
BMIX(dest);
#undef MIX
@ -1244,8 +1259,7 @@ rta_hash(rta *a)
static inline int
rta_same(rta *x, rta *y)
{
return (x->source == y->source &&
x->dest == y->dest &&
return (x->dest == y->dest &&
x->hostentry == y->hostentry &&
nexthop_same(&(x->nh), &(y->nh)) &&
ea_same(x->eattrs, y->eattrs));
@ -1388,15 +1402,10 @@ rta_do_cow(rta *o, linpool *lp)
void
rta_dump(rta *a)
{
static char *rts[] = { "", "RTS_STATIC", "RTS_INHERIT", "RTS_DEVICE",
"RTS_STAT_DEV", "RTS_REDIR", "RTS_RIP",
"RTS_OSPF", "RTS_OSPF_IA", "RTS_OSPF_EXT1",
"RTS_OSPF_EXT2", "RTS_BGP", "RTS_PIPE", "RTS_BABEL" };
static char *rtd[] = { "", " DEV", " HOLE", " UNREACH", " PROHIBIT" };
debug("uc=%d %s %s h=%04x",
a->uc, rts[a->source],
rtd[a->dest], a->hash_key);
debug("uc=%d %s h=%04x",
a->uc, rtd[a->dest], a->hash_key);
if (!a->cached)
debug(" !CACHED");
if (a->dest == RTD_UNICAST)
@ -1441,8 +1450,6 @@ rta_dump_all(void)
void
rta_show(struct cli *c, rta *a)
{
cli_printf(c, -1008, "\tType: %s", rta_src_names[a->source]);
for(ea_list *eal = a->eattrs; eal; eal=eal->next)
for(int i=0; i<eal->count; i++)
ea_show(c, &eal->attrs[i]);
@ -1476,6 +1483,7 @@ rta_init(void)
ea_register_init(&ea_gen_preference);
ea_register_init(&ea_gen_igp_metric);
ea_register_init(&ea_gen_from);
ea_register_init(&ea_gen_source);
}
/*

2
nest/rt-dev.c
View File

@ -83,12 +83,12 @@ dev_ifa_notify(struct proto *P, uint flags, struct ifa *ad)
struct rte_src *src = rt_get_source(P, ad->iface->index);
rta a0 = {
.source = RTS_DEVICE,
.dest = RTD_UNICAST,
.nh.iface = ad->iface,
};
ea_set_attr_u32(&a0.eattrs, &ea_gen_preference, 0, c->preference);
ea_set_attr_u32(&a0.eattrs, &ea_gen_source, 0, RTS_DEVICE);
a = rta_lookup(&a0);
e = rte_get_temp(a, src);

8
nest/rt-table.c
View File

@ -2588,7 +2588,7 @@ rt_flowspec_check(rtable *tab_ip, rtable *tab_flow, const net_addr *n, rta *a, i
trie_add_prefix(tab_flow->flowspec_trie, &dst, (nb ? nb->n.addr->pxlen : 0), max_pxlen);
/* No best-match BGP route -> no flowspec */
if (!rb || (rb->attrs->source != RTS_BGP))
if (!rb || (rt_get_source_attr(rb) != RTS_BGP))
return 0;
/* Find ORIGINATOR_ID values */
@ -2620,7 +2620,7 @@ rt_flowspec_check(rtable *tab_ip, rtable *tab_flow, const net_addr *n, rta *a, i
continue;
rte *rc = nc->routes;
if (rc->attrs->source != RTS_BGP)
if (rt_get_source_attr(rc) != RTS_BGP)
return 0;
if (rta_get_first_asn(rc->attrs) != asn_b)
@ -2637,7 +2637,7 @@ static rte *
rt_flowspec_update_rte(rtable *tab, rte *r)
{
#ifdef CONFIG_BGP
if (r->attrs->source != RTS_BGP)
if (rt_get_source_attr(r) != RTS_BGP)
return NULL;
struct bgp_channel *bc = (struct bgp_channel *) r->sender;
@ -3471,7 +3471,7 @@ rt_get_igp_metric(rte *rt)
if (ea)
return ea->u.data;
if (rt->attrs->source == RTS_DEVICE)
if (rt_get_source_attr(rt) == RTS_DEVICE)
return 0;
if (rt->src->proto->rte_igp_metric)

6
proto/babel/babel.c
View File

@ -645,12 +645,13 @@ babel_announce_rte(struct babel_proto *p, struct babel_entry *e)
{
struct {
ea_list l;
eattr a[5];
eattr a[6];
} eattrs = {
.l.count = ARRAY_SIZE(eattrs.a),
.a = {
EA_LITERAL_EMBEDDED(&ea_gen_preference, 0, c->preference),
EA_LITERAL_STORE_ADATA(&ea_gen_from, 0, &r->neigh->addr, sizeof(r->neigh->addr)),
EA_LITERAL_EMBEDDED(&ea_gen_source, 0, RTS_BABEL),
EA_LITERAL_EMBEDDED(&ea_babel_metric, 0, r->metric),
EA_LITERAL_STORE_ADATA(&ea_babel_router_id, 0, &r->router_id, sizeof(r->router_id)),
EA_LITERAL_EMBEDDED(&ea_babel_seqno, 0, r->seqno),
@ -658,7 +659,6 @@ babel_announce_rte(struct babel_proto *p, struct babel_entry *e)
};
rta a0 = {
.source = RTS_BABEL,
.dest = RTD_UNICAST,
.nh.gw = r->next_hop,
.nh.iface = r->neigh->ifa->iface,
@ -683,11 +683,11 @@ babel_announce_rte(struct babel_proto *p, struct babel_entry *e)
{
/* Unreachable */
rta a0 = {
.source = RTS_BABEL,
.dest = RTD_UNREACHABLE,
};
ea_set_attr_u32(&a0.eattrs, &ea_gen_preference, 0, 1);
ea_set_attr_u32(&a0.eattrs, &ea_gen_source, 0, RTS_BABEL);
rta *a = rta_lookup(&a0);
rte *rte = rte_get_temp(a, p->p.main_source);

2
proto/bgp/attrs.c
View File

@ -402,7 +402,7 @@ bgp_total_aigp_metric_(rte *e, u64 *metric, const struct adata **ad)
static inline int
bgp_init_aigp_metric(rte *e, u64 *metric, const struct adata **ad)
{
if (e->attrs->source == RTS_BGP)
if (rt_get_source_attr(e) == RTS_BGP)
return 0;
*metric = rt_get_igp_metric(e);

2
proto/bgp/config.Y
View File

@ -43,7 +43,7 @@ CF_KEYWORDS(CEASE, PREFIX, LIMIT, HIT, ADMINISTRATIVE, SHUTDOWN, RESET, PEER,
CF_GRAMMAR
toksym: BGP_MED | BGP_LOCAL_PREF ;
toksym: BGP_MED | BGP_LOCAL_PREF | SOURCE ;
proto: bgp_proto '}' ;

2
proto/bgp/packets.c
View File

@ -2474,11 +2474,11 @@ bgp_decode_nlri(struct bgp_parse_state *s, u32 afi, byte *nlri, uint len, ea_lis
{
a = allocz(RTA_MAX_SIZE);
a->source = RTS_BGP;
a->eattrs = ea;
ea_set_attr_data(&a->eattrs, &ea_gen_from, 0, &s->proto->remote_ip, sizeof(ip_addr));
ea_set_attr_u32(&a->eattrs, &ea_gen_preference, 0, c->c.preference);
ea_set_attr_u32(&a->eattrs, &ea_gen_source, 0, RTS_BGP);
c->desc->decode_next_hop(s, nh, nh_len, a);
bgp_finish_attrs(s, a);

22
proto/ospf/ospf.c
View File

@ -392,15 +392,18 @@ ospf_rte_better(struct rte *new, struct rte *old)
if (new_metric1 == LSINFINITY)
return 0;
if(new->attrs->source < old->attrs->source) return 1;
if(new->attrs->source > old->attrs->source) return 0;
u32 ns = rt_get_source_attr(new);
u32 os = rt_get_source_attr(old);
if(new->attrs->source == RTS_OSPF_EXT2)
if (ns < os) return 1;
if (ns > os) return 0;
if (ns == RTS_OSPF_EXT2)
{
u32 old_metric2 = ea_get_int(old->attrs->eattrs, &ea_ospf_metric2, LSINFINITY);
u32 new_metric2 = ea_get_int(new->attrs->eattrs, &ea_ospf_metric2, LSINFINITY);
if(new_metric2 < old_metric2) return 1;
if(new_metric2 > old_metric2) return 0;
if (new_metric2 < old_metric2) return 1;
if (new_metric2 > old_metric2) return 0;
}
u32 old_metric1 = ea_get_int(old->attrs->eattrs, &ea_ospf_metric1, LSINFINITY);
@ -413,7 +416,7 @@ ospf_rte_better(struct rte *new, struct rte *old)
static u32
ospf_rte_igp_metric(struct rte *rt)
{
if (rt->attrs->source == RTS_OSPF_EXT2)
if (rt_get_source_attr(rt) == RTS_OSPF_EXT2)
return IGP_METRIC_UNKNOWN;
return ea_get_int(rt->attrs->eattrs, &ea_ospf_metric1, LSINFINITY);
@ -571,7 +574,8 @@ ospf_get_route_info(rte * rte, byte * buf)
{
char *type = "<bug>";
switch (rte->attrs->source)
uint source = rt_get_source_attr(rte);
switch (source)
{
case RTS_OSPF:
type = "I";
@ -589,10 +593,10 @@ ospf_get_route_info(rte * rte, byte * buf)
buf += bsprintf(buf, " %s", type);
buf += bsprintf(buf, " (%d/%d", rt_get_preference(rte), ea_get_int(rte->attrs->eattrs, &ea_ospf_metric1, LSINFINITY));
if (rte->attrs->source == RTS_OSPF_EXT2)
if (source == RTS_OSPF_EXT2)
buf += bsprintf(buf, "/%d", ea_get_int(rte->attrs->eattrs, &ea_ospf_metric2, LSINFINITY));
buf += bsprintf(buf, ")");
if (rte->attrs->source == RTS_OSPF_EXT1 || rte->attrs->source == RTS_OSPF_EXT2)
if (source == RTS_OSPF_EXT1 || source == RTS_OSPF_EXT2)
{
eattr *ea = ea_find(rte->attrs->eattrs, &ea_ospf_tag);
if (ea && (ea->u.data > 0))

21
proto/ospf/rt.c
View File

@ -2004,11 +2004,19 @@ static inline int
ort_changed(ort *nf, rta *nr)
{
rta *or = nf->old_rta;
return !or ||
if (!or ||
(nf->n.metric1 != nf->old_metric1) || (nf->n.metric2 != nf->old_metric2) ||
(nf->n.tag != nf->old_tag) || (nf->n.rid != nf->old_rid) ||
(nr->source != or->source) || (nr->dest != or->dest) ||
!nexthop_same(&(nr->nh), &(or->nh));
(nr->dest != or->dest) ||
!nexthop_same(&(nr->nh), &(or->nh)))
return 1;
if ( ea_get_int(nr->eattrs, &ea_gen_source, 0)
!= ea_get_int(or->eattrs, &ea_gen_source, 0))
return 1;
return 0;
}
static void
@ -2053,7 +2061,6 @@ again1:
if (nf->n.type) /* Add the route */
{
rta a0 = {
.source = nf->n.type,
.dest = RTD_UNICAST,
.nh = *(nf->n.nhs),
};
@ -2067,7 +2074,7 @@ again1:
struct {
ea_list l;
eattr a[5];
eattr a[6];
} eattrs;
eattrs.l = (ea_list) {};
@ -2075,6 +2082,9 @@ again1:
eattrs.a[eattrs.l.count++] =
EA_LITERAL_EMBEDDED(&ea_gen_preference, 0, p->p.main_channel->preference);
eattrs.a[eattrs.l.count++] =
EA_LITERAL_EMBEDDED(&ea_gen_source, 0, nf->n.type);
eattrs.a[eattrs.l.count++] =
EA_LITERAL_EMBEDDED(&ea_ospf_metric1, 0, nf->n.metric1);
@ -2089,6 +2099,7 @@ again1:
eattrs.a[eattrs.l.count++] =
EA_LITERAL_EMBEDDED(&ea_ospf_router_id, 0, nf->n.rid);
ASSERT_DIE(ARRAY_SIZE(eattrs.a) >= eattrs.l.count);
a0.eattrs = &eattrs.l;
rta *a = rta_lookup(&a0);

2
proto/perf/perf.c
View File

@ -143,7 +143,6 @@ perf_loop(void *data)
if (!p->attrs_per_rte || !(i % p->attrs_per_rte)) {
struct rta a0 = {
.source = RTS_PERF,
.dest = RTD_UNICAST,
.nh.iface = p->ifa->iface,
.nh.gw = gw,
@ -151,6 +150,7 @@ perf_loop(void *data)
};
ea_set_attr_u32(&a0.eattrs, &ea_gen_preference, 0, p->p.main_channel->preference);
ea_set_attr_u32(&a0.eattrs, &ea_gen_source, 0, RTS_PERF);
p->data[i].a = rta_lookup(&a0);
}

4
proto/rip/rip.c
View File

@ -152,17 +152,17 @@ rip_announce_rte(struct rip_proto *p, struct rip_entry *en)
{
/* Update */
rta a0 = {
.source = RTS_RIP,
.dest = RTD_UNICAST,
};
struct {
ea_list l;
eattr a[2];
eattr a[3];
} ea_block = {
.l.count = ARRAY_SIZE(ea_block.a),
.a = {
EA_LITERAL_EMBEDDED(&ea_gen_preference, 0, p->p.main_channel->preference),
EA_LITERAL_EMBEDDED(&ea_gen_source, 0, RTS_RIP),
EA_LITERAL_EMBEDDED(&ea_rip_metric, 0, rt->metric),
},
};

2
proto/rpki/rpki.c
View File

@ -121,11 +121,11 @@ rpki_table_add_roa(struct rpki_cache *cache, struct channel *channel, const net_
struct rpki_proto *p = cache->p;
rta a0 = {
.source = RTS_RPKI,
.dest = RTD_NONE,
};
ea_set_attr_u32(&a0.eattrs, &ea_gen_preference, 0, channel->preference);
ea_set_attr_u32(&a0.eattrs, &ea_gen_source, 0, RTS_RPKI);
rta *a = rta_lookup(&a0);
rte *e = rte_get_temp(a, p->p.main_source);

2
proto/static/static.c
View File

@ -55,9 +55,9 @@ static_announce_rte(struct static_proto *p, struct static_route *r)
{
rta *a = allocz(RTA_MAX_SIZE);
struct rte_src *src = static_get_source(p, r->index);
a->source = RTS_STATIC;
a->dest = r->dest;
ea_set_attr_u32(&a->eattrs, &ea_gen_preference, 0, p->p.main_channel->preference);
ea_set_attr_u32(&a->eattrs, &ea_gen_source, 0, RTS_STATIC);
if (r->dest == RTD_UNICAST)
{

3
sysdep/bsd/krt-sock.c
View File

@ -520,9 +520,10 @@ krt_read_route(struct ks_msg *msg, struct krt_proto *p, int scan)
rta a = {
.src = p->p.main_source,
.source = RTS_INHERIT,
};
ea_set_attr_u32(&a->eattrs, &ea_gen_source, 0, RTS_INHERIT);
/* reject/blackhole routes have also set RTF_GATEWAY,
we wil check them first. */

2
sysdep/linux/netlink.c
View File

@ -1854,7 +1854,7 @@ nl_parse_route(struct nl_parse_state *s, struct nlmsghdr *h)
nl_announce_route(s);
rta *ra = lp_allocz(s->pool, RTA_MAX_SIZE);
ra->source = RTS_INHERIT;
ea_set_attr_u32(&ra->eattrs, &ea_gen_source, 0, RTS_INHERIT);
if (a[RTA_FLOW])
s->rta_flow = rta_get_u32(a[RTA_FLOW]);