Merge "Add verigraph code base"

1 files changed, 100 insertions, 0 deletions

diff --git a/verigraph/service/src/mcnet/netobjs/EndHost.java b/verigraph/service/src/mcnet/netobjs/EndHost.java
new file mode 100644
index 0000000..99cf732
--- /dev/null
+++ b/verigraph/service/src/mcnet/netobjs/EndHost.java
@@ -0,0 +1,100 @@
+/*******************************************************************************
+ * Copyright (c) 2017 Politecnico di Torino and others.
+ *
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Apache License, Version 2.0
+ * which accompanies this distribution, and is available at
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *******************************************************************************/
+
+package mcnet.netobjs;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import com.microsoft.z3.BoolExpr;
+import com.microsoft.z3.Context;
+import com.microsoft.z3.DatatypeExpr;
+import com.microsoft.z3.Expr;
+import com.microsoft.z3.IntExpr;
+import com.microsoft.z3.Solver;
+
+import mcnet.components.NetContext;
+import mcnet.components.Network;
+import mcnet.components.NetworkObject;
+/**
+ * End host network objects
+ *
+ */
+public class EndHost extends NetworkObject{
+
+	List<BoolExpr> constraints;
+	Context ctx;
+	DatatypeExpr node;
+	Network net;
+	NetContext nctx;
+
+	public EndHost(Context ctx, Object[]... args) {
+		super(ctx, args);
+	}
+
+	@Override
+	protected void init(Context ctx, Object[]... args) {
+		this.ctx = ctx;
+		isEndHost=true;
+   		constraints = new ArrayList<BoolExpr>();
+        z3Node = ((NetworkObject)args[0][0]).getZ3Node();
+        node = z3Node;
+        net = (Network)args[0][1];
+        nctx = (NetContext)args[0][2];
+		endHostRules();
+	}
+
+	@Override
+	public DatatypeExpr getZ3Node() {
+		return node;
+	}
+
+	@Override
+	protected void addConstraints(Solver solver) {
+			BoolExpr[] constr = new BoolExpr[constraints.size()];
+		    solver.add(constraints.toArray(constr));
+	}
+
+    public void endHostRules (){
+    	Expr n_0 = ctx.mkConst("eh_"+node+"_n_0", nctx.node);
+        IntExpr t_0 = ctx.mkIntConst("eh_"+node+"_t_0");
+        Expr p_0 = ctx.mkConst("eh_"+node+"_p_0", nctx.packet);
+
+        //Constraint1		send(node, n_0, p, t_0) -> nodeHasAddr(node,p.src)
+        constraints.add(
+        	ctx.mkForall(new Expr[]{n_0, p_0, t_0},
+	            ctx.mkImplies(
+	            	(BoolExpr)nctx.send.apply(	new Expr[]{ node, n_0, p_0, t_0}),
+	            	(BoolExpr)nctx.nodeHasAddr.apply(new Expr[]{node, nctx.pf.get("src").apply(p_0)})),1,null,null,null,null));
+        //Constraint2		send(node, n_0, p, t_0) -> p.origin == node
+        constraints.add(
+        	ctx.mkForall(new Expr[]{n_0, p_0, t_0},
+                ctx.mkImplies(
+                		(BoolExpr)nctx.send.apply(	new Expr[]{ node, n_0, p_0, t_0}),
+                		ctx.mkEq(nctx.pf.get("origin").apply(p_0),node)),1,null,null,null,null));
+        //Constraint3      send(node, n_0, p, t_0) -> p.orig_body == p.body
+        constraints.add(
+        	ctx.mkForall(new Expr[]{n_0, p_0, t_0},
+                ctx.mkImplies(
+                		(BoolExpr)nctx.send.apply(new Expr[]{ node, n_0, p_0, t_0}),
+                		ctx.mkEq(nctx.pf.get("orig_body").apply(p_0),nctx.pf.get("body").apply(p_0))),1,null,null,null,null));
+        //Constraint4		recv(n_0, node, p, t_0) -> nodeHasAddr(node,p.dest)
+        constraints.add(
+        	ctx.mkForall(new Expr[]{n_0, p_0, t_0},
+                ctx.mkImplies(
+                		(BoolExpr)nctx.recv.apply(	new Expr[]{ n_0, node, p_0, t_0}),
+    	            	(BoolExpr)nctx.nodeHasAddr.apply(new Expr[]{node, nctx.pf.get("dest").apply(p_0)})),1,null,null,null,null));
+
+//       Just a try: here we state that an endhost is not able to issue a HTTP response traffic
+//       See PolitoCache.py model for constants definition (2 means HTTP_RESPONSE, 1 means HTTP_REQUEST)
+//         constraints.add(ctx.mkForall(new Expr[]{n_0, p_0, t_0},
+//                 ctx.mkImplies((BoolExpr)nctx.send.apply(node, n_0, p_0, t_0),
+//                            ctx.mkEq(nctx.pf.get("proto").apply(p_0), ctx.mkInt(1))),1,null,null,null,null));
+    }
+}
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