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-rw-r--r--verigraph/service/src/mcnet/netobjs/EndHost.java100
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
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+++ b/verigraph/service/src/mcnet/netobjs/EndHost.java
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+/*******************************************************************************
+ * 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));
+ }
+} \ No newline at end of file