use of org.batfish.datamodel.PrefixRange in project batfish by batfish.
the class CiscoControlPlaneExtractor method toRoutePolicyPrefixSet.
private RoutePolicyPrefixSet toRoutePolicyPrefixSet(Rp_prefix_setContext ctx) {
if (ctx.name != null) {
// named
String name = ctx.name.getText();
int expressionLine = ctx.name.getStart().getLine();
return new RoutePolicyPrefixSetName(name, expressionLine);
} else {
// inline
PrefixSpace prefixSpace = new PrefixSpace();
Prefix6Space prefix6Space = new Prefix6Space();
boolean ipv6 = false;
for (Prefix_set_elemContext pctxt : ctx.elems) {
int lower;
int upper;
Prefix prefix = null;
Prefix6 prefix6 = null;
if (pctxt.prefix != null) {
prefix = Prefix.parse(pctxt.prefix.getText());
lower = prefix.getPrefixLength();
upper = Prefix.MAX_PREFIX_LENGTH;
} else if (pctxt.ipa != null) {
prefix = new Prefix(toIp(pctxt.ipa), Prefix.MAX_PREFIX_LENGTH);
lower = prefix.getPrefixLength();
upper = Prefix.MAX_PREFIX_LENGTH;
} else if (pctxt.ipv6a != null) {
prefix6 = new Prefix6(toIp6(pctxt.ipv6a), Prefix6.MAX_PREFIX_LENGTH);
lower = prefix6.getPrefixLength();
upper = Prefix6.MAX_PREFIX_LENGTH;
} else if (pctxt.ipv6_prefix != null) {
prefix6 = new Prefix6(pctxt.ipv6_prefix.getText());
lower = prefix6.getPrefixLength();
upper = Prefix6.MAX_PREFIX_LENGTH;
} else {
throw new BatfishException("Unhandled alternative");
}
if (pctxt.minpl != null) {
lower = toInteger(pctxt.minpl);
}
if (pctxt.maxpl != null) {
upper = toInteger(pctxt.maxpl);
}
if (pctxt.eqpl != null) {
lower = toInteger(pctxt.eqpl);
upper = lower;
}
if (prefix != null) {
prefixSpace.addPrefixRange(new PrefixRange(prefix, new SubRange(lower, upper)));
} else {
prefix6Space.addPrefix6Range(new Prefix6Range(prefix6, new SubRange(lower, upper)));
ipv6 = true;
}
}
if (ipv6) {
return new RoutePolicyInlinePrefix6Set(prefix6Space);
} else {
return new RoutePolicyInlinePrefixSet(prefixSpace);
}
}
}
use of org.batfish.datamodel.PrefixRange in project batfish by batfish.
the class CiscoConfiguration method toOspfProcess.
private org.batfish.datamodel.OspfProcess toOspfProcess(OspfProcess proc, String vrfName, Configuration c, CiscoConfiguration oldConfig) {
org.batfish.datamodel.OspfProcess newProcess = new org.batfish.datamodel.OspfProcess();
org.batfish.datamodel.Vrf vrf = c.getVrfs().get(vrfName);
if (proc.getMaxMetricRouterLsa()) {
newProcess.setMaxMetricTransitLinks(OspfProcess.MAX_METRIC_ROUTER_LSA);
if (proc.getMaxMetricIncludeStub()) {
newProcess.setMaxMetricStubNetworks(OspfProcess.MAX_METRIC_ROUTER_LSA);
}
newProcess.setMaxMetricExternalNetworks(proc.getMaxMetricExternalLsa());
newProcess.setMaxMetricSummaryNetworks(proc.getMaxMetricSummaryLsa());
}
newProcess.setProcessId(proc.getName());
// establish areas and associated interfaces
Map<Long, OspfArea> areas = newProcess.getAreas();
Map<Long, ImmutableSortedSet.Builder<String>> areaInterfacesBuilders = new HashMap<>();
List<OspfNetwork> networks = new ArrayList<>();
networks.addAll(proc.getNetworks());
Collections.sort(networks, new Comparator<OspfNetwork>() {
// sort so longest prefixes are first
@Override
public int compare(OspfNetwork lhs, OspfNetwork rhs) {
int lhsPrefixLength = lhs.getPrefix().getPrefixLength();
int rhsPrefixLength = rhs.getPrefix().getPrefixLength();
// intentionally swapped
int result = Integer.compare(rhsPrefixLength, lhsPrefixLength);
if (result == 0) {
long lhsIp = lhs.getPrefix().getStartIp().asLong();
long rhsIp = rhs.getPrefix().getStartIp().asLong();
result = Long.compare(lhsIp, rhsIp);
}
return result;
}
});
// Set RFC 1583 compatibility
newProcess.setRfc1583Compatible(proc.getRfc1583Compatible());
for (Entry<String, org.batfish.datamodel.Interface> e : vrf.getInterfaces().entrySet()) {
String ifaceName = e.getKey();
org.batfish.datamodel.Interface iface = e.getValue();
InterfaceAddress interfaceAddress = iface.getAddress();
if (interfaceAddress == null) {
continue;
}
for (OspfNetwork network : networks) {
Prefix networkPrefix = network.getPrefix();
Ip networkAddress = networkPrefix.getStartIp();
Ip maskedInterfaceAddress = interfaceAddress.getIp().getNetworkAddress(networkPrefix.getPrefixLength());
if (maskedInterfaceAddress.equals(networkAddress)) {
// we have a longest prefix match
long areaNum = network.getArea();
OspfArea newArea = areas.computeIfAbsent(areaNum, OspfArea::new);
ImmutableSortedSet.Builder<String> newAreaInterfacesBuilder = areaInterfacesBuilders.computeIfAbsent(areaNum, n -> ImmutableSortedSet.naturalOrder());
newAreaInterfacesBuilder.add(ifaceName);
iface.setOspfArea(newArea);
iface.setOspfEnabled(true);
boolean passive = proc.getPassiveInterfaceList().contains(iface.getName()) || (proc.getPassiveInterfaceDefault() && !proc.getActiveInterfaceList().contains(iface.getName()));
iface.setOspfPassive(passive);
break;
}
}
areaInterfacesBuilders.forEach((areaNum, interfacesBuilder) -> areas.get(areaNum).setInterfaces(interfacesBuilder.build()));
}
// create summarization filters for inter-area routes
for (Entry<Long, Map<Prefix, OspfAreaSummary>> e1 : proc.getSummaries().entrySet()) {
long areaLong = e1.getKey();
Map<Prefix, OspfAreaSummary> summaries = e1.getValue();
OspfArea area = areas.get(areaLong);
String summaryFilterName = "~OSPF_SUMMARY_FILTER:" + vrfName + ":" + areaLong + "~";
RouteFilterList summaryFilter = new RouteFilterList(summaryFilterName);
c.getRouteFilterLists().put(summaryFilterName, summaryFilter);
if (area == null) {
area = new OspfArea(areaLong);
areas.put(areaLong, area);
}
area.setSummaryFilter(summaryFilterName);
for (Entry<Prefix, OspfAreaSummary> e2 : summaries.entrySet()) {
Prefix prefix = e2.getKey();
OspfAreaSummary summary = e2.getValue();
int prefixLength = prefix.getPrefixLength();
int filterMinPrefixLength = summary.getAdvertised() ? Math.min(Prefix.MAX_PREFIX_LENGTH, prefixLength + 1) : prefixLength;
summaryFilter.addLine(new RouteFilterLine(LineAction.REJECT, prefix, new SubRange(filterMinPrefixLength, Prefix.MAX_PREFIX_LENGTH)));
}
area.setSummaries(ImmutableSortedMap.copyOf(summaries));
summaryFilter.addLine(new RouteFilterLine(LineAction.ACCEPT, Prefix.ZERO, new SubRange(0, Prefix.MAX_PREFIX_LENGTH)));
}
String ospfExportPolicyName = "~OSPF_EXPORT_POLICY:" + vrfName + "~";
RoutingPolicy ospfExportPolicy = new RoutingPolicy(ospfExportPolicyName, c);
c.getRoutingPolicies().put(ospfExportPolicyName, ospfExportPolicy);
List<Statement> ospfExportStatements = ospfExportPolicy.getStatements();
newProcess.setExportPolicy(ospfExportPolicyName);
// policy map for default information
if (proc.getDefaultInformationOriginate()) {
If ospfExportDefault = new If();
ospfExportStatements.add(ospfExportDefault);
ospfExportDefault.setComment("OSPF export default route");
Conjunction ospfExportDefaultConditions = new Conjunction();
List<Statement> ospfExportDefaultStatements = ospfExportDefault.getTrueStatements();
ospfExportDefaultConditions.getConjuncts().add(new MatchPrefixSet(new DestinationNetwork(), new ExplicitPrefixSet(new PrefixSpace(Collections.singleton(new PrefixRange(Prefix.ZERO, new SubRange(0, 0)))))));
long metric = proc.getDefaultInformationMetric();
ospfExportDefaultStatements.add(new SetMetric(new LiteralLong(metric)));
OspfMetricType metricType = proc.getDefaultInformationMetricType();
ospfExportDefaultStatements.add(new SetOspfMetricType(metricType));
// add default export map with metric
String defaultOriginateMapName = proc.getDefaultInformationOriginateMap();
boolean useAggregateDefaultOnly;
if (defaultOriginateMapName != null) {
int defaultOriginateMapLine = proc.getDefaultInformationOriginateMapLine();
useAggregateDefaultOnly = true;
RoutingPolicy ospfDefaultGenerationPolicy = c.getRoutingPolicies().get(defaultOriginateMapName);
if (ospfDefaultGenerationPolicy == null) {
undefined(CiscoStructureType.ROUTE_MAP, defaultOriginateMapName, CiscoStructureUsage.OSPF_DEFAULT_ORIGINATE_ROUTE_MAP, defaultOriginateMapLine);
} else {
RouteMap generationRouteMap = _routeMaps.get(defaultOriginateMapName);
generationRouteMap.getReferers().put(proc, "ospf default-originate route-map");
GeneratedRoute.Builder route = new GeneratedRoute.Builder();
route.setNetwork(Prefix.ZERO);
route.setAdmin(MAX_ADMINISTRATIVE_COST);
route.setGenerationPolicy(defaultOriginateMapName);
newProcess.getGeneratedRoutes().add(route.build());
}
} else if (proc.getDefaultInformationOriginateAlways()) {
useAggregateDefaultOnly = true;
// add generated aggregate with no precondition
GeneratedRoute.Builder route = new GeneratedRoute.Builder();
route.setNetwork(Prefix.ZERO);
route.setAdmin(MAX_ADMINISTRATIVE_COST);
newProcess.getGeneratedRoutes().add(route.build());
} else {
// do not generate an aggregate default route;
// just redistribute any existing default route with the new metric
useAggregateDefaultOnly = false;
}
if (useAggregateDefaultOnly) {
ospfExportDefaultConditions.getConjuncts().add(new MatchProtocol(RoutingProtocol.AGGREGATE));
}
ospfExportDefaultStatements.add(Statements.ExitAccept.toStaticStatement());
ospfExportDefault.setGuard(ospfExportDefaultConditions);
}
// policy for redistributing connected routes
// TODO: honor subnets option
OspfRedistributionPolicy rcp = proc.getRedistributionPolicies().get(RoutingProtocol.CONNECTED);
if (rcp != null) {
If ospfExportConnected = new If();
ospfExportConnected.setComment("OSPF export connected routes");
Conjunction ospfExportConnectedConditions = new Conjunction();
ospfExportConnectedConditions.getConjuncts().add(new MatchProtocol(RoutingProtocol.CONNECTED));
List<Statement> ospfExportConnectedStatements = ospfExportConnected.getTrueStatements();
Long metric = rcp.getMetric();
OspfMetricType metricType = rcp.getMetricType();
ospfExportConnectedStatements.add(new SetOspfMetricType(metricType));
boolean explicitMetric = metric != null;
if (!explicitMetric) {
metric = proc.getDefaultMetric(_vendor, RoutingProtocol.CONNECTED);
}
ospfExportStatements.add(new SetMetric(new LiteralLong(metric)));
ospfExportStatements.add(ospfExportConnected);
// add default export map with metric
String exportConnectedRouteMapName = rcp.getRouteMap();
if (exportConnectedRouteMapName != null) {
int exportConnectedRouteMapLine = rcp.getRouteMapLine();
RouteMap exportConnectedRouteMap = _routeMaps.get(exportConnectedRouteMapName);
if (exportConnectedRouteMap == null) {
undefined(CiscoStructureType.ROUTE_MAP, exportConnectedRouteMapName, CiscoStructureUsage.OSPF_REDISTRIBUTE_CONNECTED_MAP, exportConnectedRouteMapLine);
} else {
exportConnectedRouteMap.getReferers().put(proc, "ospf redistribute connected route-map");
ospfExportConnectedConditions.getConjuncts().add(new CallExpr(exportConnectedRouteMapName));
}
}
ospfExportConnectedStatements.add(Statements.ExitAccept.toStaticStatement());
ospfExportConnected.setGuard(ospfExportConnectedConditions);
}
// policy map for redistributing static routes
// TODO: honor subnets option
OspfRedistributionPolicy rsp = proc.getRedistributionPolicies().get(RoutingProtocol.STATIC);
if (rsp != null) {
If ospfExportStatic = new If();
ospfExportStatic.setComment("OSPF export static routes");
Conjunction ospfExportStaticConditions = new Conjunction();
ospfExportStaticConditions.getConjuncts().add(new MatchProtocol(RoutingProtocol.STATIC));
List<Statement> ospfExportStaticStatements = ospfExportStatic.getTrueStatements();
ospfExportStaticConditions.getConjuncts().add(new Not(new MatchPrefixSet(new DestinationNetwork(), new ExplicitPrefixSet(new PrefixSpace(Collections.singleton(new PrefixRange(Prefix.ZERO, new SubRange(0, 0))))))));
Long metric = rsp.getMetric();
OspfMetricType metricType = rsp.getMetricType();
ospfExportStaticStatements.add(new SetOspfMetricType(metricType));
boolean explicitMetric = metric != null;
if (!explicitMetric) {
metric = proc.getDefaultMetric(_vendor, RoutingProtocol.STATIC);
}
ospfExportStatements.add(new SetMetric(new LiteralLong(metric)));
ospfExportStatements.add(ospfExportStatic);
// add export map with metric
String exportStaticRouteMapName = rsp.getRouteMap();
if (exportStaticRouteMapName != null) {
int exportStaticRouteMapLine = rsp.getRouteMapLine();
RouteMap exportStaticRouteMap = _routeMaps.get(exportStaticRouteMapName);
if (exportStaticRouteMap == null) {
undefined(CiscoStructureType.ROUTE_MAP, exportStaticRouteMapName, CiscoStructureUsage.OSPF_REDISTRIBUTE_STATIC_MAP, exportStaticRouteMapLine);
} else {
exportStaticRouteMap.getReferers().put(proc, "ospf redistribute static route-map");
ospfExportStaticConditions.getConjuncts().add(new CallExpr(exportStaticRouteMapName));
}
}
ospfExportStaticStatements.add(Statements.ExitAccept.toStaticStatement());
ospfExportStatic.setGuard(ospfExportStaticConditions);
}
// policy map for redistributing bgp routes
// TODO: honor subnets option
OspfRedistributionPolicy rbp = proc.getRedistributionPolicies().get(RoutingProtocol.BGP);
if (rbp != null) {
If ospfExportBgp = new If();
ospfExportBgp.setComment("OSPF export bgp routes");
Conjunction ospfExportBgpConditions = new Conjunction();
ospfExportBgpConditions.getConjuncts().add(new MatchProtocol(RoutingProtocol.BGP));
List<Statement> ospfExportBgpStatements = ospfExportBgp.getTrueStatements();
ospfExportBgpConditions.getConjuncts().add(new Not(new MatchPrefixSet(new DestinationNetwork(), new ExplicitPrefixSet(new PrefixSpace(Collections.singleton(new PrefixRange(Prefix.ZERO, new SubRange(0, 0))))))));
Long metric = rbp.getMetric();
OspfMetricType metricType = rbp.getMetricType();
ospfExportBgpStatements.add(new SetOspfMetricType(metricType));
boolean explicitMetric = metric != null;
if (!explicitMetric) {
metric = proc.getDefaultMetric(_vendor, RoutingProtocol.BGP);
}
ospfExportStatements.add(new SetMetric(new LiteralLong(metric)));
ospfExportStatements.add(ospfExportBgp);
// add export map with metric
String exportBgpRouteMapName = rbp.getRouteMap();
if (exportBgpRouteMapName != null) {
int exportBgpRouteMapLine = rbp.getRouteMapLine();
RouteMap exportBgpRouteMap = _routeMaps.get(exportBgpRouteMapName);
if (exportBgpRouteMap == null) {
undefined(CiscoStructureType.ROUTE_MAP, exportBgpRouteMapName, CiscoStructureUsage.OSPF_REDISTRIBUTE_BGP_MAP, exportBgpRouteMapLine);
} else {
exportBgpRouteMap.getReferers().put(proc, "ospf redistribute bgp route-map");
ospfExportBgpConditions.getConjuncts().add(new CallExpr(exportBgpRouteMapName));
}
}
ospfExportBgpStatements.add(Statements.ExitAccept.toStaticStatement());
ospfExportBgp.setGuard(ospfExportBgpConditions);
}
newProcess.setReferenceBandwidth(proc.getReferenceBandwidth());
Ip routerId = proc.getRouterId();
if (routerId == null) {
Map<String, Interface> interfacesToCheck;
Map<String, Interface> allInterfaces = oldConfig.getInterfaces();
Map<String, Interface> loopbackInterfaces = new HashMap<>();
for (Entry<String, Interface> e : allInterfaces.entrySet()) {
String ifaceName = e.getKey();
Interface iface = e.getValue();
if (ifaceName.toLowerCase().startsWith("loopback") && iface.getActive() && iface.getAddress() != null) {
loopbackInterfaces.put(ifaceName, iface);
}
}
if (loopbackInterfaces.isEmpty()) {
interfacesToCheck = allInterfaces;
} else {
interfacesToCheck = loopbackInterfaces;
}
Ip highestIp = Ip.ZERO;
for (Interface iface : interfacesToCheck.values()) {
if (!iface.getActive()) {
continue;
}
for (InterfaceAddress address : iface.getAllAddresses()) {
Ip ip = address.getIp();
if (highestIp.asLong() < ip.asLong()) {
highestIp = ip;
}
}
}
if (highestIp == Ip.ZERO) {
_w.redFlag("No candidates for OSPF router-id");
return null;
}
routerId = highestIp;
}
newProcess.setRouterId(routerId);
return newProcess;
}
use of org.batfish.datamodel.PrefixRange in project batfish by batfish.
the class Graph method getOriginatedNetworks.
/*
* Collects and returns all originated prefixes for the given
* router as well as the protocol. Static routes and connected
* routes are treated as originating the prefix.
*/
public static Set<Prefix> getOriginatedNetworks(Configuration conf, Protocol proto) {
Set<Prefix> acc = new HashSet<>();
if (proto.isOspf()) {
OspfProcess ospf = conf.getDefaultVrf().getOspfProcess();
for (OspfArea area : ospf.getAreas().values()) {
for (String ifaceName : area.getInterfaces()) {
Interface iface = conf.getInterfaces().get(ifaceName);
if (iface.getActive() && iface.getOspfEnabled()) {
acc.add(iface.getAddress().getPrefix());
}
}
}
return acc;
}
if (proto.isBgp()) {
RoutingPolicy defaultPol = findCommonRoutingPolicy(conf, Protocol.BGP);
if (defaultPol != null) {
AstVisitor v = new AstVisitor();
v.visit(conf, defaultPol.getStatements(), stmt -> {
}, expr -> {
if (expr instanceof Conjunction) {
Conjunction c = (Conjunction) expr;
if (c.getConjuncts().size() >= 2) {
BooleanExpr be1 = c.getConjuncts().get(0);
BooleanExpr be2 = c.getConjuncts().get(1);
if (be1 instanceof MatchPrefixSet && be2 instanceof Not) {
MatchPrefixSet mps = (MatchPrefixSet) be1;
Not n = (Not) be2;
if (n.getExpr() instanceof MatchProtocol) {
MatchProtocol mp = (MatchProtocol) n.getExpr();
if (mp.getProtocol() == RoutingProtocol.BGP) {
PrefixSetExpr e = mps.getPrefixSet();
if (e instanceof ExplicitPrefixSet) {
ExplicitPrefixSet eps = (ExplicitPrefixSet) e;
Set<PrefixRange> ranges = eps.getPrefixSpace().getPrefixRanges();
for (PrefixRange r : ranges) {
acc.add(r.getPrefix());
}
}
}
}
}
}
}
});
}
return acc;
}
if (proto.isConnected()) {
for (Interface iface : conf.getInterfaces().values()) {
InterfaceAddress address = iface.getAddress();
if (address != null) {
acc.add(address.getPrefix());
}
}
return acc;
}
if (proto.isStatic()) {
for (StaticRoute sr : conf.getDefaultVrf().getStaticRoutes()) {
if (sr.getNetwork() != null) {
acc.add(sr.getNetwork());
}
}
return acc;
}
throw new BatfishException("ERROR: getOriginatedNetworks: " + proto.name());
}
use of org.batfish.datamodel.PrefixRange in project batfish by batfish.
the class TransferBDD method matchPrefixSet.
/*
* Converts a prefix set to a boolean expression.
*/
private BDD matchPrefixSet(TransferParam<BDDRoute> p, Configuration conf, PrefixSetExpr e, BDDRoute other) {
if (e instanceof ExplicitPrefixSet) {
ExplicitPrefixSet x = (ExplicitPrefixSet) e;
Set<PrefixRange> ranges = x.getPrefixSpace().getPrefixRanges();
if (ranges.isEmpty()) {
p.debug("empty");
return factory.one();
}
BDD acc = factory.zero();
for (PrefixRange range : ranges) {
p.debug("Prefix Range: " + range);
if (!PrefixUtils.isContainedBy(range.getPrefix(), _ignoredNetworks)) {
acc = acc.or(isRelevantFor(other, range));
}
}
return acc;
} else if (e instanceof NamedPrefixSet) {
NamedPrefixSet x = (NamedPrefixSet) e;
p.debug("Named: " + x.getName());
String name = x.getName();
RouteFilterList fl = conf.getRouteFilterLists().get(name);
return matchFilterList(p, fl, other);
} else {
throw new BatfishException("TODO: match prefix set: " + e);
}
}
use of org.batfish.datamodel.PrefixRange in project batfish by batfish.
the class TransferBDD method matchFilterList.
/*
* Converts a route filter list to a boolean expression.
*/
private BDD matchFilterList(TransferParam<BDDRoute> p, RouteFilterList x, BDDRoute other) {
BDD acc = factory.zero();
List<RouteFilterLine> lines = new ArrayList<>(x.getLines());
Collections.reverse(lines);
for (RouteFilterLine line : lines) {
Prefix pfx = line.getPrefix();
if (!PrefixUtils.isContainedBy(pfx, _ignoredNetworks)) {
SubRange r = line.getLengthRange();
PrefixRange range = new PrefixRange(pfx, r);
p.debug("Prefix Range: " + range);
p.debug("Action: " + line.getAction());
BDD matches = isRelevantFor(other, range);
BDD action = mkBDD(line.getAction() == LineAction.ACCEPT);
acc = ite(matches, action, acc);
}
}
return acc;
}
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