FW_filters template reworked

- Added support for `term.log` statement
- Added additional checks for if term.from.protocol is defined
- Added section for the case where DST prefix list is defined, but SRC
prefix list not (e.g. `DF_DENY` in PE CPM filters).

geant/gap_ansible/roles/base_config/templates/routers/nokia/filters/fw_filters.j2

@@ -17,10 +17,16 @@
         <admin-state>{{ filter.admin_state }}</admin-state>
   {% endif %}
   {% for term in filter.terms %}
+    {% if term.offset is defined %}
+      {% set ns3 = namespace(entry_id = term.offset | int) %}
+    {% endif %}
     {% if term.from is not defined %}
           <entry>
             <entry-id>{{ ns3.entry_id }}</entry-id>
             <description>{{ term.name }}</description>
+            {% if term.log is defined %}
+            <log>{{ term.log }}</log>
+            {% endif %}
             <action>
                 <{{term.action}}></{{term.action}}>
             </action>
@@ -29,10 +35,13 @@
 
     {% if term.from is defined %}
   {# This is the case for TCP_ESTABLISHED #}
-      {% if term.from.protocol == "tcp" and term.from.tcp_flag is defined %}
+      {% if term.from.protocol is defined and term.from.protocol == "tcp" and term.from.tcp_flag is defined %}
           <entry>
             <entry-id>{{ ns3.entry_id }}</entry-id>
             <description>{{ term.name }}</description>
+            {% if term.log is defined %}
+            <log>{{ term.log }}</log>
+            {% endif %}
             <match>
               {% if filter.family == "ipv4" %}
               <protocol>{{ term.from.protocol }}</protocol>
@@ -50,11 +59,14 @@
         {% set ns3.entry_id = ns3.entry_id + 10 %}
       {% endif %}
       {# This is to cover CPM-ipv6 ND case where dst_prefix_list is defined, but not src_prefix_list #}
-      {% if term.from.protocol == "ipv6-icmp" and term.from.dst_prefix_list is defined %}
+      {%  if term.from.protocol is defined and term.from.protocol == "ipv6-icmp" and term.from.dst_prefix_list is defined %}
         {% for dst_prefix_list_item in term.from.dst_prefix_list %}
           <entry>
             <entry-id>{{ ns3.entry_id }}</entry-id>
             <description>{{ term.name }}</description>
+            {% if term.log is defined %}
+            <log>{{ term.log }}</log>
+            {% endif %}
             <match>
               <next-header>{{ term.from.protocol }}</next-header>
               <dst-ip>
@@ -69,12 +81,15 @@
           {% endfor %}
       {% endif %}
       {# Generic ICMP filters with ICMP types #}
-      {% if term.from.protocol == "icmp" or term.from.protocol == "ipv6-icmp" %}
+      {% if term.from.protocol is defined and (term.from.protocol == "icmp" or term.from.protocol == "ipv6-icmp") %}
         {% if term.from.icmp_types is defined %}
           {% for icmp_type in term.from.icmp_types %}
           <entry>
             <entry-id>{{ ns3.entry_id }}</entry-id>
             <description>{{ term.name }}</description>
+            {% if term.log is defined %}
+            <log>{{ term.log }}</log>
+            {% endif %}
             <match>
                   {% if filter.family == "ipv4" %}
               <protocol>{{ term.from.protocol }}</protocol>
@@ -94,10 +109,13 @@
         {% endif %}
       {% endif %}
       {# Case when only need to match on protocol, e.g. PIM #}
-        {% if term.from.protocol == 'pim' %}
+        {% if term.from.protocol is defined and term.from.protocol == 'pim' %}
           <entry>
             <entry-id>{{ ns3.entry_id }}</entry-id>
             <description>{{ term.name }}</description>
+            {% if term.log is defined %}
+            <log>{{ term.log }}</log>
+            {% endif %}
             <match>
                   {% if filter.family == "ipv4" %}
               <protocol>{{ term.from.protocol }}</protocol>
@@ -120,6 +138,9 @@
           <entry>
             <entry-id>{{ ns3.entry_id }}</entry-id>
             <description>{{ term.name }}</description>
+            {% if term.log is defined %}
+            <log>{{ term.log }}</log>
+            {% endif %}
             <match>
               {% if term.from.protocol is defined %}
                 {% if filter.family == "ipv4" %}
@@ -155,6 +176,9 @@
           <entry>
             <entry-id> {{ ns3.entry_id }} </entry-id>
             <description>{{ term.name }}</description>
+            {% if term.log is defined %}
+            <log>{{ term.log }}</log>
+            {% endif %}
             <match>
             {% if term.from.protocol is defined %}
                 {% if filter.family == "ipv4" %}
@@ -180,6 +204,39 @@
           {% endif %}
         {% endfor %}
       {% endif %}
+      {# Case where only DST prefix list is defined #}
+      {% if term.from.dst_prefix_list is defined %}
+        {% for dst_prefix_list_item in term.from.dst_prefix_list %}
+          <entry>
+            <entry-id>{{ ns3.entry_id }}</entry-id>
+            <description>{{ term.name }}</description>
+            {% if term.log is defined %}
+            <log>{{ term.log }}</log>
+            {% endif %}
+            <match>
+              {% if term.from.protocol is defined %}
+                {% if filter.family == "ipv4" %}
+              <protocol>{{term.from.protocol}}</protocol>
+                {% else %}
+              <next-header>{{ term.from.protocol }}</next-header>
+                {% endif %}
+              {% endif %}
+            {% include 'port_list_entries.j2' %}
+              <dst-ip>
+                {% if filter.family == "ipv4" %}
+                <ip-prefix-list>{{term.from.dst_prefix_list[loop.index0]}}</ip-prefix-list>
+                {% else %}
+                <ipv6-prefix-list>{{term.from.dst_prefix_list[loop.index0]}}</ipv6-prefix-list>
+                {% endif %}
+              </dst-ip>
+            </match>
+            {% set ns3.entry_id = ns3.entry_id + 10 %}
+            <action>
+                <{{term.action}}></{{term.action}}>
+            </action>
+          </entry>
+        {% endfor %}
+      {% endif %}
     {% endif %}
   {% endfor %}
 {# Terms end #}