verigraph/service/src/mcnet/netobjs/PolitoFieldModifier.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 PolitoFieldModifier extends NetworkObject {
  27
  28         List<BoolExpr> constraints;
  29         Context ctx;
  30         DatatypeExpr politoFieldModifier;
  31         Network net;
  32         NetContext nctx;
  33
  34         public PolitoFieldModifier(Context ctx, Object[]... args) {
  35                 super(ctx, args);
  36         }
  37
  38         @Override
  39         public DatatypeExpr getZ3Node() {
  40                 return politoFieldModifier;
  41         }
  42
  43         @Override
  44         protected void init(Context ctx, Object[]... args) {
  45                 this.ctx = ctx;
  46                 isEndHost=false;
  47                 constraints = new ArrayList<BoolExpr>();
  48         z3Node = ((NetworkObject)args[0][0]).getZ3Node();
  49         politoFieldModifier = z3Node;
  50         net = (Network)args[0][1];
  51         nctx = (NetContext)args[0][2];
  52         }
  53
  54         @Override
  55         protected void addConstraints(Solver solver) {
  56                 BoolExpr[] constr = new BoolExpr[constraints.size()];
  57             solver.add(constraints.toArray(constr));
  58         }
  59
  60         public void installFieldModifier (){
  61                 Expr x = ctx.mkConst("politoFieldModifier_"+politoFieldModifier+"_x", nctx.node);
  62         Expr y = ctx.mkConst("politoFieldModifier_"+politoFieldModifier+"_y", nctx.node);
  63         Expr p_0 = ctx.mkConst("politoFieldModifier_"+politoFieldModifier+"_p_0", nctx.packet);
  64         Expr p_1 = ctx.mkConst("politoFieldModifier_"+politoFieldModifier+"_p_1", nctx.packet);
  65
  66         IntExpr t_0 = ctx.mkIntConst("politoFieldModifier_"+politoFieldModifier+"_t_0");
  67         IntExpr t_1 = ctx.mkIntConst("politoFieldModifier_"+politoFieldModifier+"_t_1");
  68
  69         constraints.add(
  70                         ctx.mkForall(new Expr[]{t_0, p_0, x},
  71                                 ctx.mkImplies((BoolExpr)nctx.send.apply(politoFieldModifier,x,p_0,t_0),
  72                                                           ctx.mkExists(new Expr[]{y, p_1, t_1},
  73                                                                  ctx.mkAnd(ctx.mkLt(t_1, t_0),
  74                                                                                    (BoolExpr)nctx.recv.apply(y, politoFieldModifier, p_1, t_1),
  75                                                                                    ctx.mkEq(nctx.pf.get("encrypted").apply(p_0), nctx.pf.get("encrypted").apply(p_1)),
  76                                                                                    ctx.mkEq(nctx.pf.get("src").apply(p_0), nctx.pf.get("src").apply(p_1)),
  77                                                                                    ctx.mkEq(nctx.pf.get("dest").apply(p_0), nctx.pf.get("dest").apply(p_1)),
  78                                                                                    ctx.mkEq(nctx.pf.get("inner_src").apply(p_0), nctx.pf.get("inner_src").apply(p_1)),
  79                                                                                    ctx.mkEq(nctx.pf.get("inner_dest").apply(p_0), nctx.pf.get("inner_dest").apply(p_1)),
  80                                                                                    ctx.mkEq(nctx.pf.get("origin").apply(p_0), nctx.pf.get("origin").apply(p_1)),
  81                                                                                    ctx.mkEq(nctx.pf.get("orig_body").apply(p_0), nctx.pf.get("orig_body").apply(p_1)),
  82                                                                                    ctx.mkEq(nctx.pf.get("body").apply(p_0), nctx.pf.get("body").apply(p_1)),
  83                                                                                    ctx.mkEq(nctx.pf.get("seq").apply(p_0), nctx.pf.get("seq").apply(p_1)),
  84                                                                                    ctx.mkEq(nctx.pf.get("proto").apply(p_0), nctx.pf.get("proto").apply(p_1)),
  85                                                                                    ctx.mkEq(nctx.pf.get("emailFrom").apply(p_0), nctx.pf.get("emailFrom").apply(p_1)),
  86                                                                                    ctx.mkNot(ctx.mkEq(nctx.pf.get("url").apply(p_0), nctx.pf.get("url").apply(p_1))),
  87                                                                                    ctx.mkEq(nctx.pf.get("options").apply(p_0), nctx.pf.get("options").apply(p_1))),1,null,null,null,null)),
  88                         1,null,null,null,null));
  89         }
  90
  91 }