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Diffstat (limited to 'verigraph/src/it/polito/verigraph/mcnet/netobjs/EndHost.java')
| -rw-r--r-- | verigraph/src/it/polito/verigraph/mcnet/netobjs/EndHost.java | 98 |
1 files changed, 98 insertions, 0 deletions
diff --git a/verigraph/src/it/polito/verigraph/mcnet/netobjs/EndHost.java b/verigraph/src/it/polito/verigraph/mcnet/netobjs/EndHost.java new file mode 100644 index 0000000..5eee644 --- /dev/null +++ b/verigraph/src/it/polito/verigraph/mcnet/netobjs/EndHost.java @@ -0,0 +1,98 @@ +/******************************************************************************* + * 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.IntExpr; +import com.microsoft.z3.Solver; +import it.polito.verigraph.mcnet.components.NetContext; +import it.polito.verigraph.mcnet.components.Network; +import it.polito.verigraph.mcnet.components.NetworkObject; +/** + * End host network objects + * + * + */ +public class EndHost extends NetworkObject{ + + List<BoolExpr> constraints; + Context ctx; + DatatypeExpr node; + Network net; + NetContext nctx; + + public EndHost(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]; + endHostRules(); + } + + @Override + public DatatypeExpr getZ3Node() { + return node; + } + + @Override + protected void addConstraints(Solver solver) { + BoolExpr[] constr = new BoolExpr[constraints.size()]; + solver.add(constraints.toArray(constr)); + } + + public void endHostRules (){ + Expr n_0 = ctx.mkConst("eh_"+node+"_n_0", nctx.node); + IntExpr t_0 = ctx.mkIntConst("eh_"+node+"_t_0"); + Expr p_0 = ctx.mkConst("eh_"+node+"_p_0", nctx.packet); + + //Constraint1send(node, n_0, p, t_0) -> nodeHasAddr(node,p.src) + constraints.add( + ctx.mkForall(new Expr[]{n_0, p_0, t_0}, + ctx.mkImplies( + (BoolExpr)nctx.send.apply(new Expr[]{ node, n_0, p_0, t_0}), + (BoolExpr)nctx.nodeHasAddr.apply(new Expr[]{node, nctx.pf.get("src").apply(p_0)})),1,null,null,null,null)); + //Constraint2send(node, n_0, p, t_0) -> p.origin == node + constraints.add( + ctx.mkForall(new Expr[]{n_0, p_0, t_0}, + ctx.mkImplies( + (BoolExpr)nctx.send.apply(new Expr[]{ node, n_0, p_0, t_0}), + ctx.mkEq(nctx.pf.get("origin").apply(p_0),node)),1,null,null,null,null)); + //Constraint3 send(node, 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(new Expr[]{ 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)); + //Constraint4recv(n_0, node, p, t_0) -> nodeHasAddr(node,p.dest) + constraints.add( + ctx.mkForall(new Expr[]{n_0, p_0, t_0}, + ctx.mkImplies( + (BoolExpr)nctx.recv.apply(new Expr[]{ n_0, node, p_0, t_0}), + (BoolExpr)nctx.nodeHasAddr.apply(new Expr[]{node, nctx.pf.get("dest").apply(p_0)})),1,null,null,null,null)); + + // Just a try: here we state that an endhost is not able to issue a HTTP response traffic + // See PolitoCache.py model for constants definition (2 means HTTP_RESPONSE, 1 means HTTP_REQUEST) + // 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("proto").apply(p_0), ctx.mkInt(1))),1,null,null,null,null)); + } +}
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