X-Git-Url: https://osm.etsi.org/gitweb/?p=osm%2FNBI.git;a=blobdiff_plain;f=osm_nbi%2Fbase_topic.py;h=95724092a4c1a53033c15153606584159632c66f;hp=5492a8f2798177411e320a2e2163ef9c74a62e8b;hb=cddb07d092fdcf72ce2c87cd801b93732e64d3a9;hpb=195a36c9dad758c658e6fd69b0965e366cc632ab;ds=sidebyside

diff --git a/osm_nbi/base_topic.py b/osm_nbi/base_topic.py
index 5492a8f..9572409 100644
--- a/osm_nbi/base_topic.py
+++ b/osm_nbi/base_topic.py
@@ -65,6 +65,26 @@ def versiontuple(v):
     return tuple(filled)
 
 
+def increment_ip_mac(ip_mac, vm_index=1):
+    if not isinstance(ip_mac, str):
+        return ip_mac
+    try:
+        # try with ipv4 look for last dot
+        i = ip_mac.rfind(".")
+        if i > 0:
+            i += 1
+            return "{}{}".format(ip_mac[:i], int(ip_mac[i:]) + vm_index)
+        # try with ipv6 or mac look for last colon. Operate in hex
+        i = ip_mac.rfind(":")
+        if i > 0:
+            i += 1
+            # format in hex, len can be 2 for mac or 4 for ipv6
+            return ("{}{:0" + str(len(ip_mac) - i) + "x}").format(ip_mac[:i], int(ip_mac[i:], 16) + vm_index)
+    except Exception:
+        pass
+    return None
+
+
 class BaseTopic:
     # static variables for all instance classes
     topic = None        # to_override