summaryrefslogtreecommitdiffstats
path: root/verigraph/service/src/mcnet/netobjs/PolitoCache.java
diff options
context:
space:
mode:
Diffstat (limited to 'verigraph/service/src/mcnet/netobjs/PolitoCache.java')
-rw-r--r--verigraph/service/src/mcnet/netobjs/PolitoCache.java177
1 files changed, 177 insertions, 0 deletions
diff --git a/verigraph/service/src/mcnet/netobjs/PolitoCache.java b/verigraph/service/src/mcnet/netobjs/PolitoCache.java
new file mode 100644
index 0000000..948915c
--- /dev/null
+++ b/verigraph/service/src/mcnet/netobjs/PolitoCache.java
@@ -0,0 +1,177 @@
+/*******************************************************************************
+ * 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 com.microsoft.z3.Sort;
+
+import mcnet.components.NetContext;
+import mcnet.components.Network;
+import mcnet.components.NetworkObject;
+/**Cache Model
+ *
+ */
+public class PolitoCache extends NetworkObject{
+
+ List<BoolExpr> constraints;
+ Context ctx;
+ DatatypeExpr politoCache;
+ Network net;
+ NetContext nctx;
+ FuncDecl isInBlacklist;
+
+ public PolitoCache(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();
+ politoCache = z3Node;
+ net = (Network)args[0][1];
+ nctx = (NetContext)args[0][2];
+ //net.saneSend(this);
+ }
+
+ @Override
+ public DatatypeExpr getZ3Node() {
+ return politoCache;
+ }
+
+ @Override
+ protected void addConstraints(Solver solver) {
+ BoolExpr[] constr = new BoolExpr[constraints.size()];
+ solver.add(constraints.toArray(constr));
+ }
+
+ public void installCache (NetworkObject[] internalNodes){
+ Expr n_0 = ctx.mkConst("politoCache_"+politoCache+"_n_0", nctx.node);
+ Expr n_1 = ctx.mkConst("politoCache_"+politoCache+"_n_1", nctx.node);
+ Expr n_2 = ctx.mkConst("politoCache_"+politoCache+"_n_2", nctx.node);
+ Expr p_0 = ctx.mkConst("politoCache_"+politoCache+"_p_0", nctx.packet);
+ Expr p_1 = ctx.mkConst("politoCache_"+politoCache+"_p_1", nctx.packet);
+ Expr p_2 = ctx.mkConst("politoCache_"+politoCache+"_p_2", nctx.packet);
+
+ IntExpr t_0 = ctx.mkIntConst("politoCache_"+politoCache+"_t_0");
+ IntExpr t_1 = ctx.mkIntConst("politoCache_"+politoCache+"_t_1");
+ IntExpr t_2 = ctx.mkIntConst("politoCache_"+politoCache+"_t_2");
+
+ Expr a_0 = ctx.mkConst(politoCache+"politoCache_a_0", nctx.node);
+ IntExpr u_0 = ctx.mkIntConst("politoCache_"+politoCache+"_u_0");
+
+ FuncDecl isInternalNode = ctx.mkFuncDecl(politoCache+"_isInternalNode", nctx.node, ctx.mkBoolSort());
+ FuncDecl isInCache = ctx.mkFuncDecl(politoCache+"_isInCache", new Sort[]{ctx.mkIntSort(),ctx.mkIntSort()}, ctx.mkBoolSort());
+
+ assert(internalNodes.length!=0); //No internal nodes => Should never happen
+
+ //Modeling the behavior of the isInternalNode() and isInCache() functions
+ BoolExpr[] internalNodesConstraint = new BoolExpr[internalNodes.length];
+ for(int w=0;w<internalNodesConstraint.length;w++)
+ internalNodesConstraint[w]= (ctx.mkEq(a_0,internalNodes[w].getZ3Node()));
+
+ //Constraint1 if(isInternalNode(a_0) == or(listadeinodiinterni) ? True : false
+ constraints.add(
+ ctx.mkForall(new Expr[]{a_0},
+ ctx.mkIff((BoolExpr)isInternalNode.apply(a_0), ctx.mkOr(internalNodesConstraint)),1,null,null,null,null));
+
+// constraints.add(ctx.mkForall(new Expr[]{a_0}, ctx.mkEq(isInternalNode.apply(a_0),ctx.mkOr(internalNodesConstraint)),1,null,null,null,null));
+
+// constraints.add(ctx.mkForall(new Expr[]{u_0, t_0},
+// ctx.mkITE(ctx.mkExists(new Expr[]{t_1, t_2, p_1, p_2, n_1, n_2},
+// ctx.mkAnd(ctx.mkLt(t_1, t_2),
+// ctx.mkLt(t_1, t_0),
+// ctx.mkLt(t_2, t_0),
+// (BoolExpr)nctx.recv.apply(n_1, politoCache, p_1, t_1),
+// (BoolExpr)nctx.recv.apply(n_2, politoCache, p_2, t_2),
+// ctx.mkEq(nctx.pf.get("proto").apply(p_1),ctx.mkInt(nctx.HTTP_REQUEST)),
+// ctx.mkEq(nctx.pf.get("proto").apply(p_2),ctx.mkInt(nctx.HTTP_RESPONSE)),
+// (BoolExpr)isInternalNode.apply(n_1),
+// ctx.mkNot((BoolExpr)isInternalNode.apply(n_2)),
+// ctx.mkEq(nctx.pf.get("url").apply(p_1),u_0),
+// ctx.mkEq(nctx.pf.get("url").apply(p_2),u_0)),1,null,null,null,null),
+// ctx.mkEq(isInCache.apply(u_0,t_0),ctx.mkBool(true)),ctx.mkEq(isInCache.apply(u_0,t_0),ctx.mkBool(false))),1,null,null,null,null));
+//
+
+ //Constraint2 isInCache(u_0,t_0), exist t_1, t_2, p_1, p_2, n_1, n_2 :
+ // ( t_1< t_2 < t_0 && recv(n_1, politoCache, p_1, t_1) && recv(n_2, politoCache, p_2, t_2))) &&
+ // p_1.proto == HTTP_REQ && p_2.proto == HTTP_RESP &&
+ // isInternalNode(n_1) && !isInternalNode(n_2) &&
+ // p_1.url == u_0 && p_2.url == u_0 )
+ constraints.add(
+ ctx.mkForall(new Expr[]{u_0, t_0},
+ ctx.mkImplies((BoolExpr)isInCache.apply(u_0, t_0),
+ ctx.mkExists(new Expr[]{t_1,t_2,p_1,p_2,n_1, n_2},
+ ctx.mkAnd(
+ ctx.mkLt(t_1, t_2),
+ ctx.mkLt(t_1, t_0),
+ ctx.mkLt(t_2, t_0),
+ (BoolExpr)nctx.recv.apply(n_1, politoCache, p_1, t_1),
+ (BoolExpr)nctx.recv.apply(n_2, politoCache, p_2, t_2),
+ ctx.mkEq(nctx.pf.get("proto").apply(p_1), ctx.mkInt(nctx.HTTP_REQUEST)),
+ ctx.mkEq(nctx.pf.get("proto").apply(p_2), ctx.mkInt(nctx.HTTP_RESPONSE)),
+ (BoolExpr)isInternalNode.apply(n_1),
+ ctx.mkNot((BoolExpr)isInternalNode.apply(n_2)),
+ ctx.mkEq(nctx.pf.get("url").apply(p_1), u_0),
+ ctx.mkEq(nctx.pf.get("url").apply(p_2), u_0)),1,null,null,null,null)),1,null,null,null,null));
+// //Always in cache
+// constraints.add(ctx.mkForall(new Expr[]{u_0, t_0},ctx.mkEq(isInCache.apply(u_0,t_0),ctx.mkBool(true)),1,null,null,null,null));
+
+ //Constraint3 Modeling the behavior of the cache
+ // send(politoCache, n_0, p, t_0) && !isInternalNode(n_0) ->
+ // (exist t_1,n_1 :
+ // (t_1 < t_0 && recv(n_1, politoCache, p, t_1) &&
+ // p.proto == HTTP_REQ && !isInCache(p.url,t_0))
+ constraints.add(
+ ctx.mkForall(new Expr[]{n_0,p_0, t_0},
+ ctx.mkImplies(
+ ctx.mkAnd((BoolExpr)nctx.send.apply(politoCache,n_0,p_0,t_0),ctx.mkNot((BoolExpr)isInternalNode.apply(n_0))),
+ ctx.mkAnd(ctx.mkExists(new Expr[]{t_1, n_1},
+ ctx.mkAnd(
+ ctx.mkLt(t_1, t_0),
+ (BoolExpr)isInternalNode.apply(n_1),
+ (BoolExpr)nctx.recv.apply(n_1, politoCache, p_0, t_1)),1,null,null,null,null),
+ ctx.mkEq(nctx.pf.get("proto").apply(p_0), ctx.mkInt(nctx.HTTP_REQUEST)),
+ ctx.mkNot((BoolExpr)isInCache.apply(nctx.pf.get("url").apply(p_0), t_0)))),1,null,null,null,null));
+
+ //Constraint4 send(politoCache, n_0, p, t_0) && isInternalNode(n_0) ->
+ // (exist p_1,t_1 :
+ // (t_1 < t_0 && recv(n_0, politoCache, p_1, t_1) &&
+ // p_1.proto == HTTP_REQ && p.proto == HTTP_RESP &&
+ // p_1.url == p.url && p.src == p_1.dest && p.dest==p_1.src
+ // && isInCache(p.url,t_0))
+ constraints.add(
+ ctx.mkForall(new Expr[]{n_0,p_0, t_0},
+ ctx.mkImplies(
+ ctx.mkAnd((BoolExpr)nctx.send.apply(politoCache,n_0,p_0,t_0),(BoolExpr)isInternalNode.apply(n_0)),
+ ctx.mkAnd(ctx.mkExists(new Expr[]{p_1, t_1},
+ ctx.mkAnd(
+ ctx.mkLt(t_1, t_0),
+ (BoolExpr)nctx.recv.apply(n_0, politoCache, p_1, t_1),
+ ctx.mkEq(nctx.pf.get("proto").apply(p_1), ctx.mkInt(nctx.HTTP_REQUEST)),
+ ctx.mkEq(nctx.pf.get("url").apply(p_1), nctx.pf.get("url").apply(p_0))),1,null,null,null,null),
+ ctx.mkEq(nctx.pf.get("proto").apply(p_0), ctx.mkInt(nctx.HTTP_RESPONSE)),
+ ctx.mkEq(nctx.pf.get("src").apply(p_0), nctx.pf.get("dest").apply(p_1)),
+ ctx.mkEq(nctx.pf.get("dest").apply(p_0), nctx.pf.get("src").apply(p_1)),
+ (BoolExpr)isInCache.apply(nctx.pf.get("url").apply(p_0), t_0))),1,null,null,null,null));
+ }
+} \ No newline at end of file