Fix missing isis-level1 prefix routes

Signed-off-by: jensenzhang <jingxuan.n.zhang@gmail.com>
openalto · Mar 2, 2021 · 98213eb · 98213eb
1 parent 1e6b7e7
commit 98213eb
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diff --git a/...-maps/impl/src/main/java/org/opendaylight/alto/basic/impl/AltoAutoMapsCostMapUpdater.java b/...-maps/impl/src/main/java/org/opendaylight/alto/basic/impl/AltoAutoMapsCostMapUpdater.java
@@ -216,6 +216,7 @@ private void loadTopology() {
                 Tables table = optional.get();
                 if (table.getRoutes() instanceof LinkstateRoutesCase) {
                     loadTopologyFromLinkstate(((LinkstateRoutesCase) table.getRoutes()).getLinkstateRoutes());
+                    topology.prepareDefaultIntraArea();
                 } else {
                     LOG.error("Unsupported route type");
                 }

diff --git a/alto-basic/auto-maps/impl/src/main/java/org/opendaylight/alto/basic/impl/AltoTopology.java b/alto-basic/auto-maps/impl/src/main/java/org/opendaylight/alto/basic/impl/AltoTopology.java
@@ -109,6 +109,35 @@ public boolean containsNode(Long areaId, Long nodeId) {
         return multigraph.containsKey(areaId) && multigraph.get(areaId).containsVertex(nodeId);
     }
 
+    public void prepareDefaultIntraArea() {
+        Set<String> allPrefixes = multiFirstHops.keySet();
+        for (String prefix : allPrefixes) {
+            FirstHops origin = multiFirstHops.get(prefix);
+            if (origin.intraAreaId == null || origin.intraOriginId == null) {
+                Long metric = 0L;
+                Long defaultIntraArea = null;
+                Long defaultIntraOrigin = null;
+                for (Long interArea : origin.interOriginIds.keySet()) {
+                    if (defaultIntraArea == null) {
+                        defaultIntraArea = interArea;
+                    }
+                    for (Long interOrigin : origin.interOriginIds.get(interArea).keySet()) {
+                        Long currentMetric = origin.interOriginIds.get(interArea).get(interOrigin);
+                        if (defaultIntraOrigin == null) {
+                            defaultIntraOrigin = interOrigin;
+                            metric = currentMetric;
+                        }
+                        if (currentMetric < metric) {
+                            defaultIntraArea = interArea;
+                            defaultIntraOrigin = interOrigin;
+                        }
+                    }
+                }
+                addIntraPrefix(prefix, defaultIntraArea, defaultIntraOrigin);
+            }
+        }
+    }
+
     public int getDistance(Long areaId, Long sourceId, Long destId) {
         int d = 0;
         try {