Hi. Here is a small patch which allows non-zero address scopes on non-link-local addresses. This is required to create connections inside a VRF domain, as the Linux kernel documentation states.
In combination with multiple RIBs and FIBs, this makes Bird completely VRF-capable. Therefore, this patch is neccessary to integrate Bird in non-trivial routing setups without the use of multiple network namespaces. It would be nice when you accept this patch. Kind regards, Fritz Grimpen
From 24ae015b724559209d307a37236027f8a88583aa Mon Sep 17 00:00:00 2001 From: Fritz Grimpen <grim...@uni-bremen.de> Date: Tue, 7 Mar 2017 15:59:15 +0000 Subject: [PATCH] Allow address scopes for non-link-local addresses There are legal reasons to use address scopes for non-link-local addresses, for example when running BGP peerings in VRF. There is no action for listening sockets required, as [1] states, while for connecting sockets setting the SO_BINDTODEVICE sockopt is neccessary. [1] https://www.kernel.org/doc/Documentation/networking/vrf.txt --- proto/bgp/bgp.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/proto/bgp/bgp.c b/proto/bgp/bgp.c index 0f1c9446..093fb3dc 100644 --- a/proto/bgp/bgp.c +++ b/proto/bgp/bgp.c @@ -1327,8 +1327,8 @@ bgp_check_config(struct bgp_config *c) // 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 address and interface scope must be used together"); if (!(c->capabilities && c->enable_as4) && (c->remote_as > 0xFFFF)) cf_error("Neighbor AS number out of range (AS4 not available)"); -- 2.12.0
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