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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;
public class PolitoEndHost extends NetworkObject {
List<BoolExpr> constraints = new ArrayList<BoolExpr>();
Context ctx;
DatatypeExpr politoEndHost;
Network net;
NetContext nctx;
public PolitoEndHost(Context ctx, Object[]... args) {
super(ctx, args);
}
@Override
public DatatypeExpr getZ3Node() {
return politoEndHost;
}
@Override
protected void init(Context ctx, Object[]... args) {
this.ctx = ctx;
this.isEndHost = true;
this.politoEndHost = this.z3Node = ((NetworkObject)args[0][0]).getZ3Node();
this.net = (Network)args[0][1];
this.nctx = (NetContext)args[0][2];
}
@Override
protected void addConstraints(Solver solver) {
BoolExpr[] constr = new BoolExpr[constraints.size()];
solver.add(constraints.toArray(constr));
}
/*
* Fields that can be configured -> "dest","body","seq","proto","emailFrom","url","options"
*/
public void installEndHost (PacketModel packet){
System.out.println("Installing PolitoEndHost...");
Expr n_0 = ctx.mkConst("PolitoEndHost_"+politoEndHost+"_n_0", nctx.node);
Expr p_0 = ctx.mkConst("PolitoEndHost_"+politoEndHost+"_p_0", nctx.packet);
IntExpr t_0 = ctx.mkIntConst("PolitoEndHost_"+politoEndHost+"_t_0");
BoolExpr predicatesOnPktFields = ctx.mkTrue();
if(packet.getIp_dest() != null)
predicatesOnPktFields = ctx.mkAnd(predicatesOnPktFields, ctx.mkEq(nctx.pf.get("dest").apply(p_0), packet.getIp_dest()));
if(packet.getBody() != null)
predicatesOnPktFields = ctx.mkAnd(predicatesOnPktFields, ctx.mkEq(nctx.pf.get("body").apply(p_0), ctx.mkInt(packet.getBody())));
if(packet.getEmailFrom() != null)
predicatesOnPktFields = ctx.mkAnd(predicatesOnPktFields, ctx.mkEq(nctx.pf.get("emailFrom").apply(p_0), ctx.mkInt(packet.getEmailFrom())));
if(packet.getOptions() != null)
predicatesOnPktFields = ctx.mkAnd(predicatesOnPktFields, ctx.mkEq(nctx.pf.get("options").apply(p_0), ctx.mkInt(packet.getOptions())));
if(packet.getProto() != null)
predicatesOnPktFields = ctx.mkAnd(predicatesOnPktFields, ctx.mkEq(nctx.pf.get("proto").apply(p_0), ctx.mkInt(packet.getProto())));
if(packet.getSeq() != null)
predicatesOnPktFields = ctx.mkAnd(predicatesOnPktFields, ctx.mkEq(nctx.pf.get("seq").apply(p_0), ctx.mkInt(packet.getSeq())));
if(packet.getUrl() != null)
predicatesOnPktFields = ctx.mkAnd(predicatesOnPktFields, ctx.mkEq(nctx.pf.get("url").apply(p_0), ctx.mkInt(packet.getUrl())));
//Constraint1 send(politoWebClient, n_0, p, t_0) -> p.origin == politoWebClient && p.orig_body == p.body && nodeHasAddr(politoWebClient,p.src)
constraints.add( ctx.mkForall(new Expr[]{n_0, p_0, t_0},
ctx.mkImplies((BoolExpr)nctx.send.apply(politoEndHost, n_0, p_0, t_0),
ctx.mkAnd(predicatesOnPktFields,
ctx.mkEq(nctx.pf.get("orig_body").apply(p_0),nctx.pf.get("body").apply(p_0)),
ctx.mkEq(nctx.pf.get("origin").apply(p_0),politoEndHost),
(BoolExpr)nctx.nodeHasAddr.apply(politoEndHost,nctx.pf.get("src").apply(p_0)))),1,null,null,null,null));
//Constraint2 recv(n_0, politoWebClient, p, t_0) -> nodeHasAddr(politoWebClient,p.dest)
constraints.add( ctx.mkForall(new Expr[]{n_0, p_0, t_0},
ctx.mkImplies((BoolExpr)nctx.recv.apply(n_0,politoEndHost, p_0, t_0),
(BoolExpr)nctx.nodeHasAddr.apply(politoEndHost,nctx.pf.get("dest").apply(p_0))),1,null,null,null,null));
System.out.println("Done.");
return;
}
}
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