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