diff options
Diffstat (limited to 'proto/bgp/attrs.c')
| -rw-r--r-- | proto/bgp/attrs.c | 32 |
1 files changed, 22 insertions, 10 deletions
diff --git a/proto/bgp/attrs.c b/proto/bgp/attrs.c index d99c7f8..f330483 100644 --- a/proto/bgp/attrs.c +++ b/proto/bgp/attrs.c @@ -8,6 +8,8 @@ #define LOCAL_DEBUG +#include <stdlib.h> + #include "nest/bird.h" #include "nest/iface.h" #include "nest/protocol.h" @@ -123,6 +125,7 @@ bgp_encode_attrs(byte *w, struct bgp_bucket *buck) eattr *a = &buck->eattrs->attrs[i]; ASSERT(EA_PROTO(a->id) == EAP_BGP); code = EA_ID(a->id); + flags = a->flags & (BAF_OPTIONAL | BAF_TRANSITIVE | BAF_PARTIAL); if (code && code < ARRAY_SIZE(bgp_attr_table)) { struct attr_desc *desc = &bgp_attr_table[code]; @@ -138,14 +141,12 @@ bgp_encode_attrs(byte *w, struct bgp_bucket *buck) ASSERT((a->type & EAF_TYPE_MASK) == EAF_TYPE_OPAQUE); len = a->u.ptr->length; } - DBG("\tAttribute %02x (type %02x, %d bytes)\n", code, a->type, len); - /* FIXME: Partial bit for locally added transitive attributes */ + DBG("\tAttribute %02x (type %02x, %d bytes, flags %02x)\n", code, a->type, len, flags); if (remains < len + 4) { log(L_ERR "BGP: attribute list too long, ignoring the remaining attributes"); break; } - flags = a->flags & (BAF_OPTIONAL | BAF_TRANSITIVE | BAF_PARTIAL); if (len < 256) { *w++ = flags; @@ -206,11 +207,17 @@ bgp_init_prefix(struct fib_node *N) p->bucket_node.next = NULL; } +static int +bgp_compare_u32(const u32 *x, const u32 *y) +{ + return (*x < *y) ? -1 : (*x > *y) ? 1 : 0; +} + static void bgp_normalize_set(u32 *dest, u32 *src, unsigned cnt) { memcpy(dest, src, sizeof(u32) * cnt); - /* FIXME */ + qsort(dest, cnt, sizeof(u32), (int(*)(const void *, const void *)) bgp_compare_u32); } static void @@ -298,7 +305,7 @@ bgp_new_bucket(struct bgp_proto *p, ea_list *new, unsigned hash) } static struct bgp_bucket * -bgp_get_bucket(struct bgp_proto *p, ea_list *old, ea_list *tmp) +bgp_get_bucket(struct bgp_proto *p, ea_list *old, ea_list *tmp, int originate) { ea_list *t, *new; unsigned i, cnt; @@ -335,9 +342,11 @@ bgp_get_bucket(struct bgp_proto *p, ea_list *old, ea_list *tmp) if (EA_ID(a->id) < 32) seen |= 1 << EA_ID(a->id); *d = *a; + if ((d->type & EAF_ORIGINATED) && !originate && (d->flags & BAF_TRANSITIVE) && (d->flags & BAF_OPTIONAL)) + d->flags |= BAF_PARTIAL; switch (d->type & EAF_TYPE_MASK) { - case EAF_TYPE_INT_SET: /* FIXME: Normalize the other attributes? */ + case EAF_TYPE_INT_SET: { struct adata *z = alloca(sizeof(struct adata) + d->u.ptr->length); z->length = d->u.ptr->length; @@ -402,7 +411,7 @@ bgp_rt_notify(struct proto *P, net *n, rte *new, rte *old, ea_list *tmpa) if (new) { - buck = bgp_get_bucket(p, new->attrs->eattrs, tmpa); + buck = bgp_get_bucket(p, new->attrs->eattrs, tmpa, new->attrs->source != RTS_BGP); if (!buck) /* Inconsistent attribute list */ return; } @@ -682,7 +691,7 @@ bgp_decode_attrs(struct bgp_conn *conn, byte *attr, unsigned int len, struct lin type = desc->type; } else /* Unknown attribute */ - { /* FIXME: Send partial bit when forwarding */ + { if (!(flags & BAF_OPTIONAL)) { errcode = 2; goto err; } type = EAF_TYPE_OPAQUE; @@ -756,7 +765,10 @@ bgp_decode_attrs(struct bgp_conn *conn, byte *attr, unsigned int len, struct lin e = ea_find(a->eattrs, EA_CODE(EAP_BGP, BA_AS_PATH)); ASSERT(e); if (bgp_path_loopy(bgp, e)) - return NULL; + { + DBG("BGP: Path loop!\n"); + return NULL; + } /* Fill in the remaining rta fields */ e = ea_find(a->eattrs, EA_CODE(EAP_BGP, BA_NEXT_HOP)); @@ -764,7 +776,7 @@ bgp_decode_attrs(struct bgp_conn *conn, byte *attr, unsigned int len, struct lin nexthop = *(ip_addr *) e->u.ptr->data; if (ipa_equal(nexthop, bgp->local_addr)) { - DBG("BGP: Loop!\n"); /* FIXME */ + DBG("BGP: Loop!\n"); return NULL; } neigh = neigh_find(&bgp->p, &nexthop, 0) ? : bgp->neigh; |