Add support for GRE tunnels

Basic support GRE and GRETAP tunnels both for IPv4 and IPv6.
Limited support right now, only possible to configure local
ip address and remote ip address.

src/statd/python/yanger/yanger.py

@@ -38,6 +38,9 @@ def json_get_yang_type(iface_in):
     if iface_in['link_type'] == "loopback":
         return "infix-if-type:loopback"
 
+    if iface_in['link_type'] in ("gre", "gre6"):
+        return "infix-if-type:gre"
+
     if iface_in['link_type'] != "ether":
         return "infix-if-type:other"
 
@@ -53,6 +56,9 @@ def json_get_yang_type(iface_in):
     if iface_in['linkinfo']['info_kind'] == "veth":
         return "infix-if-type:veth"
 
+    if iface_in['linkinfo']['info_kind'] in ("gretap", "ip6gretap"):
+        return "infix-if-type:gretap"
+
     if iface_in['linkinfo']['info_kind'] == "vlan":
         return "infix-if-type:vlan"
 
@@ -715,6 +721,19 @@ def add_bridge_port_lower(ifname, iface_in, iface_out):
     multicast = get_brport_multicast(ifname)
     insert(iface_out, "infix-interfaces:bridge-port", "multicast", multicast)
 
+
+def add_gre(iface_in, iface_out):
+     if 'link_type' in iface_in:
+        val = json_get_yang_type(iface_in)
+        if val != "infix-if-type:gre" and val != "infix-if-type:gretap":
+            return;
+        gre={}
+        info_data=iface_in.get("linkinfo", {}).get("info_data", {})
+        gre["local"] = info_data.get("local")
+        gre["remote"] = info_data.get("remote")
+        insert(iface_out, "infix-interfaces:gre", gre)
+
+
 def add_ip_link(ifname, iface_in, iface_out):
     if 'ifname' in iface_in:
         iface_out['name'] = ifname
@@ -725,14 +744,14 @@ def add_ip_link(ifname, iface_in, iface_out):
     if 'ifalias' in iface_in:
         iface_out['description'] = iface_in['ifalias']
 
-    if 'address' in iface_in:
+    if 'address' in iface_in and not "POINTOPOINT" in iface_in["flags"]:
         iface_out['phys-address'] = iface_in['address']
 
     add_bridge_port_common(ifname, iface_in, iface_out)
     add_bridge_port_lower(ifname, iface_in, iface_out)
 
     if not iface_is_dsa(iface_in):
-        if 'link' in iface_in:
+        if iface_in.get('link'):
             insert(iface_out, "infix-interfaces:vlan", "lower-layer-if", iface_in['link'])
         elif 'link_index' in iface_in:
             # 'link_index' is the only reference we have if the link iface is in a namespace
@@ -758,6 +777,7 @@ def add_ip_link(ifname, iface_in, iface_out):
     if 'link_type' in iface_in:
         val = json_get_yang_type(iface_in)
         iface_out['type'] = val
+    add_gre(iface_in, iface_out)
 
     val = lookup(iface_in, "stats64", "rx", "bytes")
     if val is not None: