From 3690ccbe4a7eb6b4e79591b07905813112fe9d49 Mon Sep 17 00:00:00 2001
From: uvok cheetah
Date: Tue, 25 Jun 2024 18:43:58 +0200
Subject: bird: Fixup default route selection

---
 roles/uvok_bird/defaults/main.yml          |  1 +
 roles/uvok_bird/templates/clearnet.conf.j2 | 16 ++++++++++++++--
 2 files changed, 15 insertions(+), 2 deletions(-)

diff --git a/roles/uvok_bird/defaults/main.yml b/roles/uvok_bird/defaults/main.yml
index 4934326..8bf0ef3 100644
--- a/roles/uvok_bird/defaults/main.yml
+++ b/roles/uvok_bird/defaults/main.yml
@@ -11,3 +11,4 @@ uvok_bird_opts:
   clear_as: "64496"
   rpki1: "127.0.0.1"
   rpki2: "127.0.0.2"
+  babel_accept_default: false
diff --git a/roles/uvok_bird/templates/clearnet.conf.j2 b/roles/uvok_bird/templates/clearnet.conf.j2
index ff6674b..87ae8d8 100644
--- a/roles/uvok_bird/templates/clearnet.conf.j2
+++ b/roles/uvok_bird/templates/clearnet.conf.j2
@@ -29,6 +29,7 @@ protocol static myprefix {
 protocol static default6 {
     route ::/0 reject;
     ipv6 {
+        preference 10;
         table t_myas_trs;
         import all;
         export none;
@@ -99,7 +100,14 @@ template bgp pt_rc from pt_clearnet {
 protocol babel p_myas_babel {
   ipv6 {
     table t_myas_babel;
-    import where source ~ [RTS_DEVICE, RTS_BABEL];
+    import filter {
+{% if uvok_bird_opts.babel_accept_default %}
+        # accept also default route
+{% else %}
+        if is_default_route() then reject;
+{% endif %}
+        accept;
+    };
     export where source ~ [RTS_DEVICE, RTS_BABEL, RTS_STATIC];
   };
 
@@ -168,10 +176,14 @@ protocol kernel pk_myas_out {
             if (source = RTS_BGP) then {
                 accept;
             }
-            # default route
+            # static default route
             if (source = RTS_STATIC) then {
                 accept;
             }
+{% if uvok_bird_opts.babel_accept_default %}
+            # add babel default route
+            if is_default_route() then accept;
+{% endif %}
             reject;
         };
     };
-- 
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