verigraph/src/it/polito/verigraph/mcnet/netobjs/PolitoEndHost.java

   1 /*******************************************************************************
   2  * Copyright (c) 2017 Politecnico di Torino and others.
   3  *
   4  * All rights reserved. This program and the accompanying materials
   5  * are made available under the terms of the Apache License, Version 2.0
   6  * which accompanies this distribution, and is available at
   7  * http://www.apache.org/licenses/LICENSE-2.0
   8  *******************************************************************************/
   9 package it.polito.verigraph.mcnet.netobjs;
  10
  11 import java.util.ArrayList;
  12 import java.util.List;
  13 import com.microsoft.z3.BoolExpr;
  14 import com.microsoft.z3.Context;
  15 import com.microsoft.z3.DatatypeExpr;
  16 import com.microsoft.z3.Expr;
  17 import com.microsoft.z3.IntExpr;
  18 import com.microsoft.z3.Solver;
  19 import it.polito.verigraph.mcnet.components.NetContext;
  20 import it.polito.verigraph.mcnet.components.Network;
  21 import it.polito.verigraph.mcnet.components.NetworkObject;
  22 import it.polito.verigraph.mcnet.netobjs.PacketModel;
  23
  24 public class PolitoEndHost extends NetworkObject {
  25
  26     List<BoolExpr> constraints = new ArrayList<BoolExpr>();
  27     Context ctx;
  28     DatatypeExpr politoEndHost;
  29     Network net;
  30     NetContext nctx;
  31
  32     public PolitoEndHost(Context ctx, Object[]... args) {
  33         super(ctx, args);
  34     }
  35
  36     @Override
  37     public DatatypeExpr getZ3Node() {
  38         return politoEndHost;
  39     }
  40
  41     @Override
  42     protected void init(Context ctx, Object[]... args) {
  43         this.ctx = ctx;
  44         this.isEndHost = true;
  45         this.politoEndHost = this.z3Node = ((NetworkObject)args[0][0]).getZ3Node();
  46         this.net = (Network)args[0][1];
  47         this.nctx = (NetContext)args[0][2];
  48     }
  49
  50     @Override
  51     protected void addConstraints(Solver solver) {
  52         BoolExpr[] constr = new BoolExpr[constraints.size()];
  53         solver.add(constraints.toArray(constr));
  54     }
  55
  56     /*
  57      * Fields that can be configured -> "dest","body","seq","proto","emailFrom","url","options"
  58      */
  59     public void installEndHost (PacketModel packet){
  60         //System.out.println("Installing PolitoEndHost...");
  61         Expr n_0 = ctx.mkConst("PolitoEndHost_"+politoEndHost+"_n_0", nctx.node);
  62         Expr p_0 = ctx.mkConst("PolitoEndHost_"+politoEndHost+"_p_0", nctx.packet);
  63         IntExpr t_0 = ctx.mkIntConst("PolitoEndHost_"+politoEndHost+"_t_0");
  64         BoolExpr predicatesOnPktFields = ctx.mkTrue();
  65
  66         if(packet.getIp_dest() != null)
  67             predicatesOnPktFields = ctx.mkAnd(predicatesOnPktFields, ctx.mkEq(nctx.pf.get("dest").apply(p_0), packet.getIp_dest()));
  68         if(packet.getBody() != null)
  69             predicatesOnPktFields = ctx.mkAnd(predicatesOnPktFields, ctx.mkEq(nctx.pf.get("body").apply(p_0), ctx.mkInt(packet.getBody())));
  70         if(packet.getEmailFrom() != null)
  71             predicatesOnPktFields = ctx.mkAnd(predicatesOnPktFields, ctx.mkEq(nctx.pf.get("emailFrom").apply(p_0), ctx.mkInt(packet.getEmailFrom())));
  72         if(packet.getOptions() != null)
  73             predicatesOnPktFields = ctx.mkAnd(predicatesOnPktFields, ctx.mkEq(nctx.pf.get("options").apply(p_0), ctx.mkInt(packet.getOptions())));
  74         if(packet.getProto() != null)
  75             predicatesOnPktFields = ctx.mkAnd(predicatesOnPktFields, ctx.mkEq(nctx.pf.get("proto").apply(p_0), ctx.mkInt(packet.getProto())));
  76         if(packet.getSeq() != null)
  77             predicatesOnPktFields = ctx.mkAnd(predicatesOnPktFields, ctx.mkEq(nctx.pf.get("seq").apply(p_0), ctx.mkInt(packet.getSeq())));
  78         if(packet.getUrl() != null)
  79             predicatesOnPktFields = ctx.mkAnd(predicatesOnPktFields, ctx.mkEq(nctx.pf.get("url").apply(p_0), ctx.mkInt(packet.getUrl())));
  80
  81         //Constraint1 send(politoWebClient, n_0, p, t_0) -> p.origin == politoWebClient && p.orig_body == p.body && nodeHasAddr(politoWebClient,p.src)
  82         constraints.add( ctx.mkForall(new Expr[]{n_0, p_0, t_0},
  83                 ctx.mkImplies((BoolExpr)nctx.send.apply(politoEndHost, n_0, p_0, t_0),
  84                         ctx.mkAnd(predicatesOnPktFields,
  85                                 ctx.mkEq(nctx.pf.get("orig_body").apply(p_0),nctx.pf.get("body").apply(p_0)),
  86                                 ctx.mkEq(nctx.pf.get("origin").apply(p_0),politoEndHost),
  87                                 (BoolExpr)nctx.nodeHasAddr.apply(politoEndHost,nctx.pf.get("src").apply(p_0)))),1,null,null,null,null));
  88
  89         //Constraint2 recv(n_0, politoWebClient, p, t_0) -> nodeHasAddr(politoWebClient,p.dest)
  90         constraints.add( ctx.mkForall(new Expr[]{n_0, p_0, t_0},
  91                 ctx.mkImplies((BoolExpr)nctx.recv.apply(n_0,politoEndHost, p_0, t_0),
  92                         (BoolExpr)nctx.nodeHasAddr.apply(politoEndHost,nctx.pf.get("dest").apply(p_0))),1,null,null,null,null));
  93
  94         //System.out.println("Done.");
  95
  96
  97         return;
  98     }
  99
 100 }