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BGP: Allow to specify interface for regular sessions

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This may be useful if multple interfaces share the same network range.

Thanks to Fritz Grimpen for the original patch.
This commit is contained in:
Ondrej Zajicek (work)
2017-03-14 12:56:47 +01:00
parent 27f6ba651e
commit 33b6c292c3
2 changed files with 9 additions and 8 deletions
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12
proto/bgp/bgp.c
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@@ -790,7 +790,7 @@ bgp_find_proto(sock *sk)
{
struct bgp_proto *p = (struct bgp_proto *) pc->proto;
if (ipa_equal(p->cf->remote_ip, sk->daddr) &&
(!ipa_is_link_local(sk->daddr) || (p->cf->iface == sk->iface)))
(!p->cf->iface || (p->cf->iface == sk->iface)))
return p;
}
@@ -1324,11 +1324,8 @@ bgp_check_config(struct bgp_config *c)
if (!c->remote_as)
cf_error("Remote AS number must be set");
// if (ipa_is_link_local(c->remote_ip) && !c->iface)
// cf_error("Link-local neighbor address requires specified interface");
if (!ipa_is_link_local(c->remote_ip) != !c->iface)
cf_error("Link-local address and interface scope must be used together");
if (ipa_is_link_local(c->remote_ip) && !c->iface)
cf_error("Link-local neighbor address requires specified interface");
if (!(c->capabilities && c->enable_as4) && (c->remote_as > 0xFFFF))
cf_error("Neighbor AS number out of range (AS4 not available)");
@@ -1346,6 +1343,9 @@ bgp_check_config(struct bgp_config *c)
ipa_is_link_local(c->source_addr)))
cf_error("Multihop BGP cannot be used with link-local addresses");
if (c->multihop && c->iface)
cf_error("Multihop BGP cannot be bound to interface");
if (c->multihop && c->check_link)
cf_error("Multihop BGP cannot depend on link state");