bgpd: Receive SRv6 locator info from zebra

This commit extends BGP to process locator information received from
SRv6 Manager (zebra) and save the locator info in the SRv6 database.

Signed-off-by: Carmine Scarpitta <cscarpit@cisco.com>

diff --git a/bgpd/bgp_zebra.c b/bgpd/bgp_zebra.c
index 3557768814ebbcbafba7c2ca987d1f16fd9e1cbb..3d36e995401dac778a9960d964e17afb41d85bab 100644 (file)
--- a/bgpd/bgp_zebra.c
+++ b/bgpd/bgp_zebra.c
@@ -3379,11 +3379,50 @@ static int bgp_zebra_process_srv6_locator_chunk(ZAPI_CALLBACK_ARGS)
        return 0;
 }
 
+/**
+ * Internal function to process an SRv6 locator
+ *
+ * @param locator The locator to be processed
+ */
+static int bgp_zebra_process_srv6_locator_internal(struct srv6_locator *locator)
+{
+       struct bgp *bgp = bgp_get_default();
+
+       if (!bgp || !bgp->srv6_enabled || !locator)
+               return -1;
+
+       /*
+        * Check if the main BGP instance is configured to use the received
+        * locator
+        */
+       if (strcmp(bgp->srv6_locator_name, locator->name) != 0) {
+               zlog_err("%s: SRv6 Locator name unmatch %s:%s", __func__,
+                        bgp->srv6_locator_name, locator->name);
+               return 0;
+       }
+
+       zlog_info("%s: Received SRv6 locator %s %pFX, loc-block-len=%u, loc-node-len=%u func-len=%u, arg-len=%u",
+                 __func__, locator->name, &locator->prefix,
+                 locator->block_bits_length, locator->node_bits_length,
+                 locator->function_bits_length, locator->argument_bits_length);
+
+       /* Store the locator in the main BGP instance */
+       bgp->srv6_locator = srv6_locator_alloc(locator->name);
+       srv6_locator_copy(bgp->srv6_locator, locator);
+
+       /*
+        * Process VPN-to-VRF and VRF-to-VPN leaks to advertise new locator
+        * and SIDs.
+        */
+       vpn_leak_postchange_all();
+
+       return 0;
+}
+
 static int bgp_zebra_process_srv6_locator_add(ZAPI_CALLBACK_ARGS)
 {
        struct srv6_locator loc = {};
        struct bgp *bgp = bgp_get_default();
-       const char *loc_name = bgp->srv6_locator_name;
 
        if (!bgp || !bgp->srv6_enabled)
                return 0;
@@ -3391,10 +3430,7 @@ static int bgp_zebra_process_srv6_locator_add(ZAPI_CALLBACK_ARGS)
        if (zapi_srv6_locator_decode(zclient->ibuf, &loc) < 0)
                return -1;
 
-       if (bgp_zebra_srv6_manager_get_locator_chunk(loc_name) < 0)
-               return -1;
-
-       return 0;
+       return bgp_zebra_process_srv6_locator_internal(&loc);
 }
 
 static int bgp_zebra_process_srv6_locator_delete(ZAPI_CALLBACK_ARGS)