use of org.batfish.datamodel.Prefix in project batfish by batfish.
the class VirtualRouter method computeBgpAdvertisementsToOutside.
int computeBgpAdvertisementsToOutside(Map<Ip, Set<String>> ipOwners) {
int numAdvertisements = 0;
// If we have no BGP process, nothing to do
if (_vrf.getBgpProcess() == null) {
return numAdvertisements;
}
for (BgpNeighbor neighbor : _vrf.getBgpProcess().getNeighbors().values()) {
Ip localIp = neighbor.getLocalIp();
Set<String> localIpOwners = ipOwners.get(localIp);
String hostname = _c.getHostname();
if (localIpOwners == null || !localIpOwners.contains(hostname)) {
continue;
}
Prefix remotePrefix = neighbor.getPrefix();
if (remotePrefix.getPrefixLength() != Prefix.MAX_PREFIX_LENGTH) {
// Do not support dynamic outside neighbors
continue;
}
Ip remoteIp = remotePrefix.getStartIp();
if (ipOwners.get(remoteIp) != null) {
// Skip if neighbor is not outside the network
continue;
}
int localAs = neighbor.getLocalAs();
int remoteAs = neighbor.getRemoteAs();
String remoteHostname = remoteIp.toString();
String remoteVrfName = Configuration.DEFAULT_VRF_NAME;
RoutingPolicy exportPolicy = _c.getRoutingPolicies().get(neighbor.getExportPolicy());
boolean ebgpSession = localAs != remoteAs;
RoutingProtocol targetProtocol = ebgpSession ? RoutingProtocol.BGP : RoutingProtocol.IBGP;
Set<AbstractRoute> candidateRoutes = Collections.newSetFromMap(new IdentityHashMap<>());
// Add IGP routes
Set<AbstractRoute> activeRoutes = Collections.newSetFromMap(new IdentityHashMap<>());
activeRoutes.addAll(_mainRib.getRoutes());
for (AbstractRoute candidateRoute : activeRoutes) {
if (candidateRoute.getProtocol() != RoutingProtocol.BGP && candidateRoute.getProtocol() != RoutingProtocol.IBGP) {
candidateRoutes.add(candidateRoute);
}
}
/*
* bgp advertise-external
*
* When this is set, add best eBGP path independently of whether
* it is preempted by an iBGP or IGP route. Only applicable to
* iBGP sessions.
*/
boolean advertiseExternal = !ebgpSession && neighbor.getAdvertiseExternal();
if (advertiseExternal) {
candidateRoutes.addAll(_ebgpBestPathRib.getRoutes());
}
/*
* bgp advertise-inactive
*
* When this is set, add best BGP path independently of whether
* it is preempted by an IGP route. Only applicable to eBGP
* sessions.
*/
boolean advertiseInactive = ebgpSession && neighbor.getAdvertiseInactive();
/* Add best bgp paths if they are active, or if advertise-inactive */
for (AbstractRoute candidateRoute : _bgpBestPathRib.getRoutes()) {
if (advertiseInactive || activeRoutes.contains(candidateRoute)) {
candidateRoutes.add(candidateRoute);
}
}
/* Add all bgp paths if additional-paths active for this session */
boolean additionalPaths = !ebgpSession && neighbor.getAdditionalPathsSend() && neighbor.getAdditionalPathsSelectAll();
if (additionalPaths) {
candidateRoutes.addAll(_bgpMultipathRib.getRoutes());
}
for (AbstractRoute route : candidateRoutes) {
BgpRoute.Builder transformedOutgoingRouteBuilder = new BgpRoute.Builder();
RoutingProtocol routeProtocol = route.getProtocol();
boolean routeIsBgp = routeProtocol == RoutingProtocol.IBGP || routeProtocol == RoutingProtocol.BGP;
// originatorIP
Ip originatorIp;
if (!ebgpSession && routeProtocol.equals(RoutingProtocol.IBGP)) {
BgpRoute bgpRoute = (BgpRoute) route;
originatorIp = bgpRoute.getOriginatorIp();
} else {
originatorIp = _vrf.getBgpProcess().getRouterId();
}
transformedOutgoingRouteBuilder.setOriginatorIp(originatorIp);
transformedOutgoingRouteBuilder.setReceivedFromIp(neighbor.getLocalIp());
// for bgp remote route)
if (routeIsBgp) {
BgpRoute bgpRoute = (BgpRoute) route;
transformedOutgoingRouteBuilder.setOriginType(bgpRoute.getOriginType());
if (ebgpSession && bgpRoute.getAsPath().containsAs(neighbor.getRemoteAs()) && !neighbor.getAllowRemoteAsOut()) {
// disable-peer-as-check (getAllowRemoteAsOut) is set
continue;
}
/*
* route reflection: reflect everything received from
* clients to clients and non-clients. reflect everything
* received from non-clients to clients. Do not reflect to
* originator
*/
Ip routeOriginatorIp = bgpRoute.getOriginatorIp();
/*
* iBGP speaker should not send out routes to iBGP neighbor whose router-id is
* same as originator id of advertisement
*/
if (!ebgpSession && routeOriginatorIp != null && remoteIp.equals(routeOriginatorIp)) {
continue;
}
if (routeProtocol.equals(RoutingProtocol.IBGP) && !ebgpSession) {
boolean routeReceivedFromRouteReflectorClient = bgpRoute.getReceivedFromRouteReflectorClient();
boolean sendingToRouteReflectorClient = neighbor.getRouteReflectorClient();
transformedOutgoingRouteBuilder.getClusterList().addAll(bgpRoute.getClusterList());
if (!routeReceivedFromRouteReflectorClient && !sendingToRouteReflectorClient) {
continue;
}
if (sendingToRouteReflectorClient) {
// sender adds its local cluster id to clusterlist of
// new route
transformedOutgoingRouteBuilder.getClusterList().add(neighbor.getClusterId());
}
}
}
// Outgoing communities
if (routeIsBgp) {
BgpRoute bgpRoute = (BgpRoute) route;
transformedOutgoingRouteBuilder.setAsPath(bgpRoute.getAsPath().getAsSets());
if (neighbor.getSendCommunity()) {
transformedOutgoingRouteBuilder.getCommunities().addAll(bgpRoute.getCommunities());
}
}
if (ebgpSession) {
SortedSet<Integer> newAsPathElement = new TreeSet<>();
newAsPathElement.add(localAs);
transformedOutgoingRouteBuilder.getAsPath().add(0, newAsPathElement);
}
// Outgoing protocol
transformedOutgoingRouteBuilder.setProtocol(targetProtocol);
transformedOutgoingRouteBuilder.setNetwork(route.getNetwork());
// Outgoing metric
if (routeIsBgp) {
transformedOutgoingRouteBuilder.setMetric(route.getMetric());
}
// Outgoing nextHopIp
// Outgoing localPreference
Ip nextHopIp;
int localPreference;
if (ebgpSession || !routeIsBgp) {
nextHopIp = neighbor.getLocalIp();
localPreference = BgpRoute.DEFAULT_LOCAL_PREFERENCE;
} else {
nextHopIp = route.getNextHopIp();
BgpRoute ibgpRoute = (BgpRoute) route;
localPreference = ibgpRoute.getLocalPreference();
}
if (nextHopIp.equals(Route.UNSET_ROUTE_NEXT_HOP_IP)) {
// should only happen for ibgp
String nextHopInterface = route.getNextHopInterface();
InterfaceAddress nextHopAddress = _c.getInterfaces().get(nextHopInterface).getAddress();
if (nextHopAddress == null) {
throw new BatfishException("route's nextHopInterface has no address");
}
nextHopIp = nextHopAddress.getIp();
}
transformedOutgoingRouteBuilder.setNextHopIp(nextHopIp);
transformedOutgoingRouteBuilder.setLocalPreference(localPreference);
// Outgoing srcProtocol
transformedOutgoingRouteBuilder.setSrcProtocol(route.getProtocol());
/*
* CREATE OUTGOING ROUTE
*/
boolean acceptOutgoing = exportPolicy.process(route, transformedOutgoingRouteBuilder, remoteIp, remoteVrfName, Direction.OUT);
if (acceptOutgoing) {
BgpRoute transformedOutgoingRoute = transformedOutgoingRouteBuilder.build();
// Record sent advertisement
BgpAdvertisementType sentType = ebgpSession ? BgpAdvertisementType.EBGP_SENT : BgpAdvertisementType.IBGP_SENT;
Ip sentOriginatorIp = transformedOutgoingRoute.getOriginatorIp();
SortedSet<Long> sentClusterList = transformedOutgoingRoute.getClusterList();
AsPath sentAsPath = transformedOutgoingRoute.getAsPath();
SortedSet<Long> sentCommunities = transformedOutgoingRoute.getCommunities();
Prefix sentNetwork = route.getNetwork();
Ip sentNextHopIp;
String sentSrcNode = hostname;
String sentSrcVrf = _vrf.getName();
Ip sentSrcIp = neighbor.getLocalIp();
String sentDstNode = remoteHostname;
String sentDstVrf = remoteVrfName;
Ip sentDstIp = remoteIp;
int sentWeight = -1;
if (ebgpSession) {
sentNextHopIp = nextHopIp;
} else {
sentNextHopIp = transformedOutgoingRoute.getNextHopIp();
}
int sentLocalPreference = transformedOutgoingRoute.getLocalPreference();
long sentMed = transformedOutgoingRoute.getMetric();
OriginType sentOriginType = transformedOutgoingRoute.getOriginType();
RoutingProtocol sentSrcProtocol = targetProtocol;
BgpAdvertisement sentAdvert = new BgpAdvertisement(sentType, sentNetwork, sentNextHopIp, sentSrcNode, sentSrcVrf, sentSrcIp, sentDstNode, sentDstVrf, sentDstIp, sentSrcProtocol, sentOriginType, sentLocalPreference, sentMed, sentOriginatorIp, sentAsPath, sentCommunities, sentClusterList, sentWeight);
_sentBgpAdvertisements.add(sentAdvert);
numAdvertisements++;
}
}
}
return numAdvertisements;
}
use of org.batfish.datamodel.Prefix in project batfish by batfish.
the class VirtualRouter method initIntraAreaOspfRoutes.
/**
* Initialize Intra-area OSPF routes from the interface prefixes
*/
private void initIntraAreaOspfRoutes() {
OspfProcess proc = _vrf.getOspfProcess();
if (proc == null) {
// nothing to do
return;
}
// init intra-area routes from connected routes
// For each interface within an OSPF area and each interface prefix,
// construct a new OSPF-IA route. Put it in the IA RIB.
proc.getAreas().forEach((areaNum, area) -> {
for (String ifaceName : area.getInterfaces()) {
Interface iface = _c.getInterfaces().get(ifaceName);
if (iface.getActive()) {
Set<Prefix> allNetworkPrefixes = iface.getAllAddresses().stream().map(InterfaceAddress::getPrefix).collect(Collectors.toSet());
int interfaceOspfCost = iface.getOspfCost();
for (Prefix prefix : allNetworkPrefixes) {
long cost = interfaceOspfCost;
boolean stubNetwork = iface.getOspfPassive() || iface.getOspfPointToPoint();
if (stubNetwork) {
if (proc.getMaxMetricStubNetworks() != null) {
cost = proc.getMaxMetricStubNetworks();
}
} else if (proc.getMaxMetricTransitLinks() != null) {
cost = proc.getMaxMetricTransitLinks();
}
OspfIntraAreaRoute route = new OspfIntraAreaRoute(prefix, null, RoutingProtocol.OSPF.getDefaultAdministrativeCost(_c.getConfigurationFormat()), cost, areaNum);
_ospfIntraAreaRib.mergeRoute(route);
}
}
}
});
}
use of org.batfish.datamodel.Prefix in project batfish by batfish.
the class CiscoControlPlaneExtractor method exitRr_network.
@Override
public void exitRr_network(Rr_networkContext ctx) {
Ip networkAddress = toIp(ctx.network);
Ip mask = networkAddress.getClassMask();
Prefix network = new Prefix(networkAddress, mask);
_currentRipProcess.getNetworks().add(network);
}
use of org.batfish.datamodel.Prefix in project batfish by batfish.
the class CiscoControlPlaneExtractor method exitRo_network.
@Override
public void exitRo_network(Ro_networkContext ctx) {
Ip address;
Ip wildcard;
if (ctx.prefix != null) {
Prefix prefix = Prefix.parse(ctx.prefix.getText());
address = prefix.getStartIp();
wildcard = prefix.getPrefixWildcard();
} else {
address = toIp(ctx.ip);
wildcard = toIp(ctx.wildcard);
}
if (_configuration.getVendor() == ConfigurationFormat.CISCO_ASA) {
wildcard = wildcard.inverted();
}
long area;
if (ctx.area_int != null) {
area = toLong(ctx.area_int);
} else if (ctx.area_ip != null) {
area = toIp(ctx.area_ip).asLong();
} else {
throw new BatfishException("bad area");
}
OspfWildcardNetwork network = new OspfWildcardNetwork(address, wildcard, area);
_currentOspfProcess.getWildcardNetworks().add(network);
}
use of org.batfish.datamodel.Prefix in project batfish by batfish.
the class CiscoControlPlaneExtractor method exitNetwork_bgp_tail.
@Override
public void exitNetwork_bgp_tail(Network_bgp_tailContext ctx) {
Prefix prefix;
if (ctx.prefix != null) {
prefix = Prefix.parse(ctx.prefix.getText());
} else {
Ip address = toIp(ctx.ip);
Ip mask = (ctx.mask != null) ? toIp(ctx.mask) : address.getClassMask();
int prefixLength = mask.numSubnetBits();
prefix = new Prefix(address, prefixLength);
}
String map = null;
Integer mapLine = null;
if (ctx.mapname != null) {
map = ctx.mapname.getText();
mapLine = ctx.mapname.getStart().getLine();
}
BgpNetwork bgpNetwork = new BgpNetwork(prefix, map, mapLine);
BgpProcess proc = currentVrf().getBgpProcess();
proc.getIpNetworks().put(prefix, bgpNetwork);
}
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