diff options
Diffstat (limited to 'verigraph/service/src/mcnet/netobjs/PolitoAntispam.java')
| -rw-r--r-- | verigraph/service/src/mcnet/netobjs/PolitoAntispam.java | 124 |
1 files changed, 124 insertions, 0 deletions
diff --git a/verigraph/service/src/mcnet/netobjs/PolitoAntispam.java b/verigraph/service/src/mcnet/netobjs/PolitoAntispam.java new file mode 100644 index 0000000..abb4615 --- /dev/null +++ b/verigraph/service/src/mcnet/netobjs/PolitoAntispam.java @@ -0,0 +1,124 @@ +/******************************************************************************* + * 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.FuncDecl; +import com.microsoft.z3.IntExpr; +import com.microsoft.z3.Solver; + +import mcnet.components.NetContext; +import mcnet.components.Network; +import mcnet.components.NetworkObject; + +/** + * Model of an anti-spam node + * + */ +public class PolitoAntispam extends NetworkObject{ + + List<BoolExpr> constraints; + Context ctx; + DatatypeExpr politoAntispam; + Network net; + NetContext nctx; + FuncDecl isInBlacklist; + + public PolitoAntispam(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(); + politoAntispam = z3Node; + net = (Network)args[0][1]; + nctx = (NetContext)args[0][2]; + //net.saneSend(this); + } + + @Override + public DatatypeExpr getZ3Node() { + return politoAntispam; + } + + @Override + protected void addConstraints(Solver solver) { + BoolExpr[] constr = new BoolExpr[constraints.size()]; + solver.add(constraints.toArray(constr)); + } + + public void installAntispam (int[] blackList){ + Expr n_0 = ctx.mkConst(politoAntispam+"_n_0", nctx.node); + Expr n_1 = ctx.mkConst(politoAntispam+"_n_1", nctx.node); + Expr p_0 = ctx.mkConst(politoAntispam+"_p_0", nctx.packet); + IntExpr t_0 = ctx.mkIntConst(politoAntispam+"_t_0"); + IntExpr t_1 = ctx.mkIntConst(politoAntispam+"_t_1"); + IntExpr ef_0 = ctx.mkIntConst(politoAntispam+"_ef_0"); + + isInBlacklist = ctx.mkFuncDecl(politoAntispam+"_isInBlacklist", ctx.mkIntSort(), ctx.mkBoolSort()); + BoolExpr[] blConstraint = new BoolExpr[blackList.length]; + if(blackList.length != 0){ + for (int i=0;i<blackList.length;i++) + blConstraint[i]=(ctx.mkEq(ef_0,ctx.mkInt(blackList[i]))); + //Constraint1a if(isInBlackList(ef_0) == or(for bl in blacklist (ef_0==bl)) ? true : false + constraints.add(ctx.mkForall(new Expr[]{ef_0}, ctx.mkIff((BoolExpr)isInBlacklist.apply(ef_0),ctx.mkOr(blConstraint)),1,null,null,null,null)); + }else{ + //Constraint1b isInblackList(ef_0) == false + constraints.add(ctx.mkForall(new Expr[]{ef_0}, ctx.mkEq((BoolExpr)isInBlacklist.apply(ef_0), ctx.mkBool(false)),1,null,null,null,null)); + } + + //Constraint2 send(politoAntispam, n_0, p, t_0) && p.proto(POP3_RESP) -> + // (exist n_1,t_1 : (recv(n_1, politoAntispam, p, t_1) && t_1 < t_0)) && !isInBlackList(p.emailFrom) + constraints.add( ctx.mkForall(new Expr[]{n_0, p_0, t_0}, + ctx.mkImplies(ctx.mkAnd((BoolExpr)nctx.send.apply(politoAntispam, n_0, p_0, t_0), ctx.mkEq(nctx.pf.get("proto").apply(p_0), ctx.mkInt(nctx.POP3_RESPONSE))), + ctx.mkAnd( ctx.mkExists(new Expr[]{n_1, t_1}, + ctx.mkAnd((BoolExpr)nctx.recv.apply(n_1, politoAntispam, p_0, t_1), ctx.mkLt(t_1 , t_0)),1,null,null,null,null), + ctx.mkNot((BoolExpr)isInBlacklist.apply(nctx.pf.get("emailFrom").apply(p_0))))),1,null,null,null,null)); + + //Constraint3 send(politoAntispam, n_0, p, t_0) && p.proto(POP3_REQ) -> + // (exist n_1,t_1 : (recv(n_1, politoAntispam, p, t_1) && t_1 < t_0)) + constraints.add( ctx.mkForall(new Expr[]{n_0, p_0, t_0}, + ctx.mkImplies(ctx.mkAnd((BoolExpr)nctx.send.apply(politoAntispam, n_0, p_0, t_0), ctx.mkEq(nctx.pf.get("proto").apply(p_0), ctx.mkInt(nctx.POP3_REQUEST))), + ctx.mkAnd(ctx.mkExists(new Expr[]{n_1, t_1}, + ctx.mkAnd((BoolExpr)nctx.recv.apply(n_1, politoAntispam, p_0, t_1), + ctx.mkLt(t_1 , t_0)),1,null,null,null,null))),1,null,null,null,null)); + + //Constraint4 send(politoAntispam, politoErrFunction, p, t_0) -> + // (exist n_1,t_1 : (recv(n_1, politoAntispam, p, t_1) && t_1 < t_0 && p.emailFrom ==1)) + constraints.add( ctx.mkForall(new Expr[]{n_0, p_0, t_0}, + ctx.mkImplies((BoolExpr)nctx.send.apply(politoAntispam, nctx.nm.get("politoErrFunction").getZ3Node(), p_0, t_0), + ctx.mkAnd(ctx.mkExists(new Expr[]{n_1, t_1}, + ctx.mkAnd((BoolExpr)nctx.recv.apply(n_1, politoAntispam, p_0, t_1), + ctx.mkLt(t_1 , t_0), + ctx.mkEq(nctx.pf.get("emailFrom").apply(p_0),ctx.mkInt(1))),1,null,null,null,null))),1,null,null,null,null)); + + //Constraint5 send(politoAntispam, n_0, p, t_0) -> p.proto == POP_REQ || p.protpo == POP_RESP + constraints.add( ctx.mkForall(new Expr[]{n_0, p_0, t_0}, + ctx.mkImplies((BoolExpr)nctx.send.apply(politoAntispam, n_0, p_0, t_0), + ctx.mkOr( ctx.mkEq(nctx.pf.get("proto").apply(p_0), ctx.mkInt(nctx.POP3_REQUEST)), + ctx.mkEq(nctx.pf.get("proto").apply(p_0), ctx.mkInt(nctx.POP3_RESPONSE)))),1,null,null,null,null)); + + //Constraint6 send(politoAntispam, n_0, p, t_0) -> nodeHasAddr(politoAntispam,p.src) + constraints.add( ctx.mkForall(new Expr[]{n_0, p_0, t_0}, + ctx.mkImplies((BoolExpr)nctx.send.apply(politoAntispam, n_0, p_0, t_0), + ctx.mkNot((BoolExpr)nctx.nodeHasAddr.apply(politoAntispam,nctx.pf.get("src").apply(p_0)))),1,null,null,null,null)); + } + }
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