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-rw-r--r--verigraph/service/src/mcnet/netobjs/PolitoWebServer.java114
1 files changed, 114 insertions, 0 deletions
diff --git a/verigraph/service/src/mcnet/netobjs/PolitoWebServer.java b/verigraph/service/src/mcnet/netobjs/PolitoWebServer.java
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+++ b/verigraph/service/src/mcnet/netobjs/PolitoWebServer.java
@@ -0,0 +1,114 @@
+/*******************************************************************************
+ * 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;
+/**
+ * WebServer object
+ *
+ */
+public class PolitoWebServer extends NetworkObject{
+
+ List<BoolExpr> constraints;
+ Context ctx;
+ DatatypeExpr node;
+ Network net;
+ NetContext nctx;
+ FuncDecl isInBlacklist;
+
+ public PolitoWebServer(Context ctx, Object[]... args) {
+ super(ctx, args);
+ }
+
+ @Override
+ protected void init(Context ctx, Object[]... args) {
+ this.ctx = ctx;
+ isEndHost=true;
+ constraints = new ArrayList<BoolExpr>();
+ z3Node = ((NetworkObject)args[0][0]).getZ3Node();
+ node = z3Node;
+ net = (Network)args[0][1];
+ nctx = (NetContext)args[0][2];
+ webServerRules();
+ }
+
+ @Override
+ public DatatypeExpr getZ3Node() {
+ return node;
+ }
+
+ @Override
+ protected void addConstraints(Solver solver) {
+ BoolExpr[] constr = new BoolExpr[constraints.size()];
+ solver.add(constraints.toArray(constr));
+ }
+
+ private void webServerRules (){
+ Expr n_0 = ctx.mkConst("webserver_"+node+"_n_0", nctx.node);
+ Expr p_0 = ctx.mkConst("webserver_"+node+"_p_0", nctx.packet);
+ Expr p_1 = ctx.mkConst("webserver_"+node+"_p_1", nctx.packet);
+ IntExpr t_0 = ctx.mkIntConst("webserver_"+node+"_t_0");
+ IntExpr t_1 = ctx.mkIntConst("webserver_"+node+"_t_1");
+
+ //Constraint1 send(politoWebServer, n_0, p, t_0) -> nodeHasAddr(politoWebServer,p.src)
+ constraints.add( ctx.mkForall(new Expr[]{n_0, p_0, t_0},
+ ctx.mkImplies((BoolExpr)nctx.send.apply(node, n_0, p_0, t_0),
+ (BoolExpr)nctx.nodeHasAddr.apply(node,nctx.pf.get("src").apply(p_0))),1,null,null,null,null));
+
+ //Constraint2 send(politoWebServer, n_0, p, t_0) -> p.origin == politoWebServer
+ constraints.add( ctx.mkForall(new Expr[]{n_0, p_0, t_0},
+ ctx.mkImplies((BoolExpr)nctx.send.apply(node, n_0, p_0, t_0),
+ ctx.mkEq(nctx.pf.get("origin").apply(p_0),node)),1,null,null,null,null));
+
+ //Constraint3 send(politoWebServer, n_0, p, t_0) -> p.orig_body == p.body
+ constraints.add( ctx.mkForall(new Expr[]{n_0, p_0, t_0},
+ ctx.mkImplies((BoolExpr)nctx.send.apply(node, n_0, p_0, t_0),
+ ctx.mkEq(nctx.pf.get("orig_body").apply(p_0),nctx.pf.get("body").apply(p_0))),
+ 1,null,null,null,null));
+
+ //Constraint4 recv(n_0, politoWebServer, p, t_0) -> nodeHasAddr(politoWebServer,p.dest)
+ constraints.add( ctx.mkForall(new Expr[]{n_0, p_0, t_0},
+ ctx.mkImplies((BoolExpr)nctx.recv.apply(n_0,node, p_0, t_0),
+ (BoolExpr)nctx.nodeHasAddr.apply(node,nctx.pf.get("dest").apply(p_0))),1,null,null,null,null));
+
+ //Constraint5
+ // send(politoWebServer, n_0, p, t_0) ->
+ // (exist p_1,t_1 :
+ // (t_1 < t_0 && recv(n_0, politoWebServer, p_1, t_1) &&
+ // p_0.proto == HTTP_RESP && p_1.proto == HTTP_REQ &&
+ // p_0.dest == p_1.src && p_0.src == p_1.dest && p_0.url == p_1.url)
+ constraints.add( ctx.mkForall(new Expr[]{n_0, p_0, t_0},
+ ctx.mkImplies((BoolExpr)nctx.send.apply(node, n_0, p_0, t_0),
+ ctx.mkExists(new Expr[]{p_1, t_1},
+ ctx.mkAnd(
+ ctx.mkLt(t_1, t_0),
+ ctx.mkEq(nctx.pf.get("url").apply(p_0), nctx.pf.get("url").apply(p_1)),
+ (BoolExpr)nctx.recv.apply(n_0, node, p_1, t_1),
+ ctx.mkEq(nctx.pf.get("proto").apply(p_0), ctx.mkInt(nctx.HTTP_RESPONSE)),
+ ctx.mkEq(nctx.pf.get("proto").apply(p_1), ctx.mkInt(nctx.HTTP_REQUEST)),
+ ctx.mkEq(nctx.pf.get("dest").apply(p_0), nctx.pf.get("src").apply(p_1)),
+ ctx.mkEq(nctx.pf.get("src").apply(p_0), nctx.pf.get("dest").apply(p_1))),
+ 1,null,null,null,null)),1,null,null,null,null));
+ }
+}