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Diffstat (limited to 'verigraph/src/it/polito/verigraph/mcnet/netobjs/PolitoNF.java')
| -rw-r--r-- | verigraph/src/it/polito/verigraph/mcnet/netobjs/PolitoNF.java | 100 |
1 files changed, 100 insertions, 0 deletions
diff --git a/verigraph/src/it/polito/verigraph/mcnet/netobjs/PolitoNF.java b/verigraph/src/it/polito/verigraph/mcnet/netobjs/PolitoNF.java new file mode 100644 index 0000000..227224c --- /dev/null +++ b/verigraph/src/it/polito/verigraph/mcnet/netobjs/PolitoNF.java @@ -0,0 +1,100 @@ +/******************************************************************************* + * 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 it.polito.verigraph.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.FuncDecl; +import com.microsoft.z3.IntExpr; +import com.microsoft.z3.Solver; +import com.microsoft.z3.Sort; + +import it.polito.verigraph.mcnet.components.NetContext; +import it.polito.verigraph.mcnet.components.Network; +import it.polito.verigraph.mcnet.components.NetworkObject; + +/** First example of custom network function: a simple filter + * + * + */ +public class PolitoNF extends NetworkObject{ + + List<BoolExpr> constraints; + Context ctx; + DatatypeExpr politoNF; + Network net; + NetContext nctx; + FuncDecl isInBlacklist; + + + public PolitoNF(Context ctx, Object[]... args) { + super(ctx, args); + } + + @Override + protected void init(Context ctx, Object[]... args) { + this.ctx = ctx; + isEndHost=false; + constraints = new ArrayList<BoolExpr>(); + z3Node = ((NetworkObject)args[0][0]).getZ3Node(); + politoNF = z3Node; + net = (Network)args[0][1]; + nctx = (NetContext)args[0][2]; + //net.saneSend(this); + } + + public void politoNFRules (DatatypeExpr ipA,DatatypeExpr ipB){ + // System.out.println("[PolitoNf] Installing rules"); + Expr n_0 = ctx.mkConst("politoNF_"+politoNF+"_n_0", nctx.node); + Expr n_1 = ctx.mkConst("politoNF_"+politoNF+"_n_1", nctx.node); + Expr p_0 = ctx.mkConst("politoNF_"+politoNF+"_p_0", nctx.packet); + IntExpr t_0 = ctx.mkIntConst("politoNF_"+politoNF+"_t_0"); + IntExpr t_1 = ctx.mkIntConst("politoNF_"+politoNF+"_t_1"); + Expr a_0 = ctx.mkConst(politoNF+"_politoNF_a_0", nctx.address); + Expr a_1 = ctx.mkConst(politoNF+"_politoNF_a_1", nctx.address); + + FuncDecl myFunction = ctx.mkFuncDecl(politoNF+"_myFunction", new Sort[]{nctx.address,nctx.address}, ctx.mkBoolSort()); + + BoolExpr myConstraint = ctx.mkForall(new Expr[]{n_0, p_0, t_0}, + ctx.mkImplies((BoolExpr)nctx.send.apply(politoNF, n_0, p_0, t_0), + ctx.mkExists(new Expr[]{n_1, t_1}, + ctx.mkAnd((BoolExpr)nctx.recv.apply(n_1, politoNF, p_0, t_1), + ctx.mkLt(t_1 , t_0), + (BoolExpr)myFunction.apply(nctx.pf.get("src").apply(p_0), nctx.pf.get("dest").apply(p_0))),1,null,null,null,null)),1,null,null,null,null); + + BoolExpr funcConstraint = ctx.mkOr(ctx.mkAnd(ctx.mkEq(a_0, ipA), ctx.mkEq(a_1, ipB)), ctx.mkAnd(ctx.mkEq(a_0,ipB), ctx.mkEq(a_1,ipA))); + + // Constraint1myFunction(a_0,a_1) == ((a_0 == ipA && a_1 == ipB) || (a_0 == ipB && a_1 == ipA)) + constraints.add( + ctx.mkForall(new Expr[]{a_0,a_1}, + ctx.mkEq(myFunction.apply(a_0, a_1), funcConstraint),1,null,null,null,null)); + + //Constraint2send(politoNF, n_0, p, t_0) -> + //(exist n_1,t_1 : (t_1 < t_0 && recv(n_1, politoNF, p, t_1) && myFunction(p.src,p.dest)) + constraints.add(myConstraint); + + } + + @Override + protected void addConstraints(Solver solver) { + BoolExpr[] constr = new BoolExpr[constraints.size()]; + solver.add(constraints.toArray(constr)); + } + + @Override + public DatatypeExpr getZ3Node() { + return politoNF; + } + +}
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