srv6: T591: initial implementation to support locator definition

VyOS CLI

set protocols segment-routing srv6 locator bar prefix '2001:b::/64'
set protocols segment-routing srv6 locator foo behavior-usid
set protocols segment-routing srv6 locator foo prefix '2001:a::/64'

Will generate in FRR

segment-routing
 srv6
  locators
   locator bar
    prefix 2001:b::/64 block-len 40 node-len 24 func-bits 16
   exit
   !
   locator foo
    prefix 2001:a::/64 block-len 40 node-len 24 func-bits 16
    behavior usid
   exit
   !
  exit
  !
 exit
 !
exit

1 files changed, 23 insertions, 0 deletions

diff --git a/data/templates/frr/zebra.segment_routing.frr.j2 b/data/templates/frr/zebra.segment_routing.frr.j2
new file mode 100644
index 000000000..7b12fcdd0
--- /dev/null
+++ b/data/templates/frr/zebra.segment_routing.frr.j2
@@ -0,0 +1,23 @@
+!
+{% if srv6.locator is vyos_defined %}
+segment-routing
+ srv6
+  locators
+{%     for locator, locator_config in srv6.locator.items() %}
+   locator {{ locator }}
+{%         if locator_config.prefix is vyos_defined %}
+    prefix {{ locator_config.prefix }} block-len {{ locator_config.block_len }} node-len {{ locator_config.node_len }} func-bits {{ locator_config.func_bits }}
+{%         endif %}
+{%         if locator_config.behavior_usid is vyos_defined %}
+    behavior usid
+{%         endif %}
+    exit
+    !
+{%     endfor %}
+  exit
+  !
+exit
+!
+exit
+!
+{% endif %}