commit eeb5fb3a50079e1af6e655694c6ff99ec2f9d070
author Ignas Bačius <ignas@noia.network> Thu Oct 03 17:15:38 2019 +0300
committer Damjan Marion <dmarion@me.com> Wed Oct 23 07:52:22 2019 +0000
tree da14b1e36c66e6977e175cbe040892df57f828cf
parent bd0a00a45637c1dde533ef6c3798418c2ab15009

sr: add "set sr encaps hop-limit" command

Default hop-limit for the encapsulating IPv6 header is a compile-time
constant. Add ability to specify custom hop-limit, in order to avoid
packets being dropped with "hop limit exceeded in transit" response in
certain network configurations.

Type: feature
Signed-off-by: Ignas Bačius <ignas@noia.network>
Change-Id: I77f2b35c987cfd31801dc2744d31fb3c1984158f

src/vnet/srv6/sr_api.c

diff --git a/src/vnet/srv6/sr_api.c b/src/vnet/srv6/sr_api.c
index 32eff2e..f3738da 100644
--- a/src/vnet/srv6/sr_api.c
+++ b/src/vnet/srv6/sr_api.c
@@ -50,6 +50,7 @@
 _(SR_POLICY_DEL, sr_policy_del)                         \
 _(SR_STEERING_ADD_DEL, sr_steering_add_del)             \
 _(SR_SET_ENCAP_SOURCE, sr_set_encap_source)             \
+_(SR_SET_ENCAP_HOP_LIMIT, sr_set_encap_hop_limit)       \
 _(SR_LOCALSIDS_DUMP, sr_localsids_dump)                 \
 _(SR_POLICIES_DUMP, sr_policies_dump)                   \
 _(SR_STEERING_POL_DUMP, sr_steering_pol_dump)
@@ -178,6 +179,20 @@
   REPLY_MACRO (VL_API_SR_SET_ENCAP_SOURCE_REPLY);
 }
 
+static void
+vl_api_sr_set_encap_hop_limit_t_handler (vl_api_sr_set_encap_hop_limit_t * mp)
+{
+  vl_api_sr_set_encap_hop_limit_reply_t *rmp;
+  int rv = 0;
+
+  if (mp->hop_limit == 0)
+    rv = VNET_API_ERROR_INVALID_VALUE;
+  else
+    sr_set_hop_limit (mp->hop_limit);
+
+  REPLY_MACRO (VL_API_SR_SET_ENCAP_HOP_LIMIT_REPLY);
+}
+
 static void vl_api_sr_steering_add_del_t_handler
   (vl_api_sr_steering_add_del_t * mp)
 {