Examples with BooleanExpr org.batfish.z3.expr.BooleanExpr used on opensource projects

Example 41 with BooleanExpr

use of org.batfish.z3.expr.BooleanExpr in project batfish by batfish.

the class Simplifier method visitEqExpr.

@Override
public BooleanExpr visitEqExpr(EqExpr eqExpr) {
    IntExpr lhs = eqExpr.getLhs();
    IntExpr rhs = eqExpr.getRhs();
    if (lhs.equals(rhs)) {
        return TrueExpr.INSTANCE;
    } else if (lhs instanceof LitIntExpr && rhs instanceof LitIntExpr) {
        return FalseExpr.INSTANCE;
    } else {
        return eqExpr;
    }
}

Example 42 with BooleanExpr

use of org.batfish.z3.expr.BooleanExpr in project batfish by batfish.

the class Simplifier method visitTransformationRuleStatement.

@Override
public Statement visitTransformationRuleStatement(TransformationRuleStatement transformationRuleStatement) {
    /**
     * TODO: something smarter
     */
    BooleanExpr originalPreconditionStateIndependentConstraints = transformationRuleStatement.getPreconditionStateIndependentConstraints();
    BooleanExpr simplifiedPreconditionStateIndependentConstraints = simplifyBooleanExpr(originalPreconditionStateIndependentConstraints);
    if (originalPreconditionStateIndependentConstraints != simplifiedPreconditionStateIndependentConstraints) {
        return simplifyStatement(new TransformationRuleStatement(simplifiedPreconditionStateIndependentConstraints, transformationRuleStatement.getPreconditionPreTransformationStates(), transformationRuleStatement.getPreconditionPostTransformationStates(), transformationRuleStatement.getPostconditionTransformationState()));
    } else if (simplifiedPreconditionStateIndependentConstraints == FalseExpr.INSTANCE) {
        return VACUOUS_RULE;
    } else {
        return transformationRuleStatement;
    }
}

Example 43 with BooleanExpr

use of org.batfish.z3.expr.BooleanExpr in project batfish by batfish.

the class DefaultTransitionGenerator method visitPreOutEdgePostNat_generateMatchSourceNatRules.

private void visitPreOutEdgePostNat_generateMatchSourceNatRules(String node1, String iface1, String node2, String iface2) {
    List<Entry<AclPermit, BooleanExpr>> sourceNats = _input.getSourceNats().get(node1).get(iface1);
    for (int natNumber = 0; natNumber < sourceNats.size(); natNumber++) {
        ImmutableSet.Builder<StateExpr> preStates = ImmutableSet.builder();
        preStates.add(new PreOutEdge(node1, iface1, node2, iface2));
        // does not match any previous source NAT.
        sourceNats.subList(0, natNumber).stream().map(Entry::getKey).map(aclPermit -> new AclDeny(aclPermit.getHostname(), aclPermit.getAcl())).forEach(preStates::add);
        // does match the current source NAT.
        preStates.add(sourceNats.get(natNumber).getKey());
        BooleanExpr transformationExpr = sourceNats.get(natNumber).getValue();
        _rules.add(new TransformationRuleStatement(transformationExpr, preStates.build(), ImmutableSet.of(), new PreOutEdgePostNat(node1, iface1, node2, iface2)));
    }
}

Example 44 with BooleanExpr

use of org.batfish.z3.expr.BooleanExpr in project batfish by batfish.

the class StandardReachabilityQuerySynthesizer method getReachabilityProgram.

@Override
public ReachabilityProgram getReachabilityProgram(SynthesizerInput input) {
    ImmutableList.Builder<RuleStatement> rules = ImmutableList.builder();
    List<StateExpr> finalActions = computeFinalActions();
    ImmutableList.Builder<BooleanExpr> queryPreconditions = ImmutableList.<BooleanExpr>builder().add(SaneExpr.INSTANCE).add(getSrcNattedConstraint());
    finalActions.stream().map(finalAction -> new BasicRuleStatement(new AndExpr(queryPreconditions.build()), ImmutableSet.of(finalAction), Query.INSTANCE)).forEach(rules::add);
    addOriginateRules(rules);
    return ReachabilityProgram.builder().setInput(input).setQueries(ImmutableList.of(new QueryStatement(Query.INSTANCE))).setRules(rules.build()).build();
}