From: Louis Scalbert <louis.scalbert@6wind.com>
Date: Fri, 22 Apr 2022 16:08:08 +0000 (+0200)
Subject: lib: add a function to get the VRF or loopback interface
X-Git-Tag: base_8.5~109^2~16
X-Git-Url: https://git.puffer.fish/?a=commitdiff_plain;h=e7192e9d24638fec3c482982df2ec0763c453ce0;p=mirror%2Ffrr.git

lib: add a function to get the VRF or loopback interface

Add a function to find the VRF or the loopback interface: the loopback
interface for the default VRF and the VRF master interface otherwise.

Signed-off-by: Louis Scalbert <louis.scalbert@6wind.com>
---

diff --git a/lib/if.c b/lib/if.c
index 70c0c18141..db73210036 100644
--- a/lib/if.c
+++ b/lib/if.c
@@ -564,6 +564,20 @@ size_t if_lookup_by_hwaddr(const uint8_t *hw_addr, size_t addrsz,
 	return count;
 }
 
+/* Get the VRF loopback interface, i.e. the loopback on the default VRF
+ * or the VRF interface.
+ */
+struct interface *if_get_vrf_loopback(vrf_id_t vrf_id)
+{
+	struct interface *ifp = NULL;
+	struct vrf *vrf = vrf_lookup_by_id(vrf_id);
+
+	FOR_ALL_INTERFACES (vrf, ifp)
+		if (if_is_loopback(ifp))
+			return ifp;
+
+	return NULL;
+}
 
 /* Get interface by name if given name interface doesn't exist create
    one. */
diff --git a/lib/if.h b/lib/if.h
index 91dcd46247..a653246ccb 100644
--- a/lib/if.h
+++ b/lib/if.h
@@ -532,6 +532,7 @@ static inline bool if_address_is_local(const void *matchaddr, int family,
 struct vrf;
 extern struct interface *if_lookup_by_name_vrf(const char *name, struct vrf *vrf);
 extern struct interface *if_lookup_by_name(const char *ifname, vrf_id_t vrf_id);
+extern struct interface *if_get_vrf_loopback(vrf_id_t vrf_id);
 extern struct interface *if_get_by_name(const char *ifname, vrf_id_t vrf_id,
 					const char *vrf_name);