diff options
Diffstat (limited to 'proto/bgp/attrs.c')
| -rw-r--r-- | proto/bgp/attrs.c | 14 |
1 files changed, 9 insertions, 5 deletions
diff --git a/proto/bgp/attrs.c b/proto/bgp/attrs.c index 8743358..039828f 100644 --- a/proto/bgp/attrs.c +++ b/proto/bgp/attrs.c @@ -752,7 +752,7 @@ bgp_get_bucket(struct bgp_proto *p, net *n, ea_list *attrs, int originate) /* Check if next hop is valid */ a = ea_find(new, EA_CODE(EAP_BGP, BA_NEXT_HOP)); - if (!a || ipa_equal(p->next_hop, *(ip_addr *)a->u.ptr->data)) + if (!a || ipa_equal(p->cf->remote_ip, *(ip_addr *)a->u.ptr->data)) { log(L_ERR "%s: Invalid NEXT_HOP attribute in route %I/%d", p->p.name, n->n.prefix, n->n.pxlen); return NULL; @@ -808,7 +808,6 @@ bgp_rt_notify(struct proto *P, rtable *tbl UNUSED, net *n, rte *new, rte *old UN bgp_schedule_packet(p->conn, PKT_UPDATE); } - static int bgp_create_attrs(struct bgp_proto *p, rte *e, ea_list **attrs, struct linpool *pool) { @@ -834,12 +833,14 @@ bgp_create_attrs(struct bgp_proto *p, rte *e, ea_list **attrs, struct linpool *p put_u32(z+2, p->local_as); } + /* iBGP -> use gw, eBGP multi-hop -> use source_addr, + eBGP single-hop -> use gw if on the same iface */ z = bgp_set_attr_wa(ea->attrs+2, pool, BA_NEXT_HOP, NEXT_HOP_LENGTH); if (p->cf->next_hop_self || rta->dest != RTD_ROUTER || - ipa_equal(e->attrs->gw, IPA_NONE) || + ipa_equal(rta->gw, IPA_NONE) || ipa_has_link_scope(rta->gw) || - (!p->is_internal && (rta->iface != p->neigh->iface))) + (!p->is_internal && (!p->neigh || (rta->iface != p->neigh->iface)))) set_next_hop(z, p->source_addr); else set_next_hop(z, rta->gw); @@ -904,8 +905,11 @@ bgp_update_attrs(struct bgp_proto *p, rte *e, ea_list **attrs, struct linpool *p bgp_attach_attr(attrs, pool, BA_MULTI_EXIT_DISC, 0); } + /* iBGP -> keep next_hop, eBGP multi-hop -> use source_addr, + eBGP single-hop -> keep next_hop if on the same iface */ a = ea_find(e->attrs->eattrs, EA_CODE(EAP_BGP, BA_NEXT_HOP)); - if (a && !p->cf->next_hop_self && (p->is_internal || (!p->is_internal && e->attrs->iface == p->neigh->iface))) + if (a && !p->cf->next_hop_self && + (p->is_internal || (p->neigh && (e->attrs->iface == p->neigh->iface)))) { /* Leave the original next hop attribute, will check later where does it point */ } |