From 36ba11f7d8581f32d565f4568edc68cc2ef881aa Mon Sep 17 00:00:00 2001
From: Carmine Scarpitta <cscarpit@cisco.com>
Date: Thu, 20 Feb 2025 11:33:56 +0100
Subject: [PATCH] lib: Extend nexthop json helper to display SRv6 encap
 behavior

This commit extends the `show ip route json` and `show ipv6 route json`
output to display the SRv6 encapsulation behavior associated with the
SRv6 nexthop.

```
router# show ipv6 route json
[...]
	"2001:db8:1:1::1/128": [
		{
			"prefix": "2001:db8:1:1::1/128",
			"prefixLen": 128,
			"protocol": "static",
			"selected": true,
			"destSelected": true,
			"distance": 1,
			"metric": 0,
			"installed": true,
			"nexthops": [
				{
					"directlyConnected": true,
					"active": true,
					"weight": 1,
					"seg6local": {
						"action": "unspec"
					},
					"seg6": [
						"fcbb:bbbb:1:2:3:4:5:6",
						"fcbb:bbbb:7:8:fe00::"
					],
					"srv6EncapBehavior": "H.Encaps"
				}
			]
		}
	],
[...]
```

Signed-off-by: Carmine Scarpitta <cscarpit@cisco.com>
---
 lib/nexthop.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/lib/nexthop.c b/lib/nexthop.c
index 09ff295a98..b17205e1bf 100644
--- a/lib/nexthop.c
+++ b/lib/nexthop.c
@@ -1348,6 +1348,9 @@ void nexthop_json_helper(json_object *json_nexthop,
 						&nexthop->nh_srv6->seg6_segs
 							 ->seg[0]);
 			json_object_object_add(json_nexthop, "seg6", json_seg6);
+			json_object_string_add(json_nexthop, "srv6EncapBehavior",
+					       srv6_headend_behavior2str(
+						       nexthop->nh_srv6->seg6_segs->encap_behavior));
 		} else {
 			if (nexthop->nh_srv6->seg6_segs) {
 				json_segs = json_object_new_array();
@@ -1364,6 +1367,10 @@ void nexthop_json_helper(json_object *json_nexthop,
 								 ->seg[seg_idx]));
 				json_object_object_add(json_nexthop, "seg6",
 						       json_segs);
+				json_object_string_add(json_nexthop, "srv6EncapBehavior",
+						       srv6_headend_behavior2str(
+							       nexthop->nh_srv6->seg6_segs
+								       ->encap_behavior));
 			}
 		}
 	}
-- 
2.39.5