1 /*******************************************************************************
2 * Copyright (c) 2017 Politecnico di Torino and others.
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 package it.polito.verigraph.mcnet.netobjs;
11 import java.util.ArrayList;
12 import java.util.List;
14 import com.microsoft.z3.BoolExpr;
15 import com.microsoft.z3.Context;
16 import com.microsoft.z3.DatatypeExpr;
17 import com.microsoft.z3.Expr;
18 import com.microsoft.z3.FuncDecl;
19 import com.microsoft.z3.IntExpr;
20 import com.microsoft.z3.Solver;
22 import it.polito.verigraph.mcnet.components.NetContext;
23 import it.polito.verigraph.mcnet.components.Network;
24 import it.polito.verigraph.mcnet.components.NetworkObject;
25 /** Mail server objects
29 public class PolitoMailServer extends NetworkObject{
31 List<BoolExpr> constraints;
33 DatatypeExpr politoMailServer;
36 FuncDecl isInBlacklist;
38 public PolitoMailServer(Context ctx, Object[]... args) {
43 protected void init(Context ctx, Object[]... args) {
46 constraints = new ArrayList<BoolExpr>();
47 z3Node = ((NetworkObject)args[0][0]).getZ3Node();
48 politoMailServer = z3Node;
49 net = (Network)args[0][1];
50 nctx = (NetContext)args[0][2];
56 public DatatypeExpr getZ3Node() {
57 return politoMailServer;
61 protected void addConstraints(Solver solver) {
62 BoolExpr[] constr = new BoolExpr[constraints.size()];
63 solver.add(constraints.toArray(constr));
66 private void mailServerRules (){
67 Expr n_0 = ctx.mkConst(politoMailServer+"_n_0", nctx.node);
68 Expr p_0 = ctx.mkConst(politoMailServer+"_p_0", nctx.packet);
69 Expr p_1 = ctx.mkConst(politoMailServer+"_p_1", nctx.packet);
70 IntExpr t_0 = ctx.mkIntConst(politoMailServer+"_t_0");
71 IntExpr t_1 = ctx.mkIntConst(politoMailServer+"_t_1");
73 //Constraint1 send(politoMailServer, n_0, p, t_0) -> nodeHasAddr(politoMailServer,p.src)
74 constraints.add( ctx.mkForall(new Expr[]{n_0, p_0, t_0},
75 ctx.mkImplies((BoolExpr)nctx.send.apply(politoMailServer, n_0, p_0, t_0),
76 (BoolExpr)nctx.nodeHasAddr.apply(politoMailServer,nctx.pf.get("src").apply(p_0))),1,null,null,null,null));
78 //Constraint2 send(politoMailServer, n_0, p, t_0) -> p.origin == politoMailServer
79 constraints.add( ctx.mkForall(new Expr[]{n_0, p_0, t_0},
80 ctx.mkImplies((BoolExpr)nctx.send.apply(politoMailServer, n_0, p_0, t_0),
81 ctx.mkEq(nctx.pf.get("origin").apply(p_0),politoMailServer)),1,null,null,null,null));
83 //Constraint3 send(politoMailServer, n_0, p, t_0) -> p.orig_body == p.body
84 constraints.add( ctx.mkForall(new Expr[]{n_0, p_0, t_0},
85 ctx.mkImplies((BoolExpr)nctx.send.apply(politoMailServer, n_0, p_0, t_0),
86 ctx.mkEq(nctx.pf.get("orig_body").apply(p_0),nctx.pf.get("body").apply(p_0))),1,null,null,null,null));
88 //Constraint4 recv(n_0, politoMailServer, p, t_0) -> nodeHasAddr(politoMailServer,p.dest)
89 constraints.add( ctx.mkForall(new Expr[]{n_0, p_0, t_0},
90 ctx.mkImplies((BoolExpr)nctx.recv.apply(n_0,politoMailServer, p_0, t_0),
91 (BoolExpr)nctx.nodeHasAddr.apply(politoMailServer,nctx.pf.get("dest").apply(p_0))),1,null,null,null,null));
93 //Constraint5 send(politoMailServer, n_0, p, t_0) -> p.proto == POP3_RESP && p.emailFrom == 1
94 constraints.add( ctx.mkForall(new Expr[]{n_0, p_0, t_0},
95 ctx.mkImplies((BoolExpr)nctx.send.apply(politoMailServer, n_0, p_0, t_0),
96 ctx.mkAnd(ctx.mkEq(nctx.pf.get("proto").apply(p_0), ctx.mkInt(nctx.POP3_RESPONSE)),
97 ctx.mkEq(nctx.pf.get("emailFrom").apply(p_0), ctx.mkInt(1)))),1,null,null,null,null));
99 //Constraint6 send(politoMailServer, n_0, p, t_0) ->
100 // (exist p_1, t_1 : (t_1 < t_0 && recv(n_0, politoMailServer, p_1, t_1) &&
101 // p_0.proto == POP3_RESP && p_1.proto == POP3_REQ && p_0.dest == p_1.src )
103 constraints.add( ctx.mkForall(new Expr[]{n_0, p_0, t_0},
104 ctx.mkImplies((BoolExpr)nctx.send.apply(politoMailServer, n_0, p_0, t_0),
105 ctx.mkExists(new Expr[]{p_1, t_1},
106 ctx.mkAnd(ctx.mkLt(t_1, t_0),
107 (BoolExpr)nctx.recv.apply(n_0, politoMailServer, p_1, t_1),
108 ctx.mkEq(nctx.pf.get("proto").apply(p_0), ctx.mkInt(nctx.POP3_RESPONSE)),
109 ctx.mkEq(nctx.pf.get("proto").apply(p_1), ctx.mkInt(nctx.POP3_REQUEST)),
110 ctx.mkEq(nctx.pf.get("dest").apply(p_0), nctx.pf.get("src").apply(p_1))),1,null,null,null,null)),1,null,null,null,null));
112 // constraints.add( ctx.mkForall(new Expr[]{n_0, p_0, t_0},
113 // ctx.mkImplies((BoolExpr)nctx.send.apply(politoMailServer, n_0, p_0, t_0),
114 // ctx.mkEq(nctx.pf.get("emailFrom").apply(p_0),ctx.mkInt(2))),1,null,null,null,null));