bcast-relay: T5313: verify() relay interfaces have IPv4 address configured

(cherry picked from commit ca7c063666c038d104082542f04ead6062e79246)

1 files changed, 18 insertions, 0 deletions

diff --git a/python/vyos/validate.py b/python/vyos/validate.py
index 9aa23d3dc..83862b722 100644
--- a/python/vyos/validate.py
+++ b/python/vyos/validate.py
@@ -111,6 +111,24 @@ def is_addr_assigned(addr):
 
     return False
 
+def is_afi_configured(interface, afi):
+    """ Check if given address family is configured, or in other words - an IP
+    address is assigned to the interface. """
+    from netifaces import ifaddresses
+    from netifaces import AF_INET
+    from netifaces import AF_INET6
+
+    if afi not in [AF_INET, AF_INET6]:
+        raise ValueError('Address family must be in [AF_INET, AF_INET6]')
+
+    try:
+        addresses = ifaddresses(interface)
+    except ValueError as e:
+        print(e)
+        return False
+
+    return afi in addresses
+
 def is_loopback_addr(addr):
     """ Check if supplied IPv4/IPv6 address is a loopback address """
     from ipaddress import ip_address