Examples with Segments org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev200120.path.attributes.attributes.as.path.Segments used on opensource projects

Example 6 with Segments

use of org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev200120.path.attributes.attributes.as.path.Segments in project bgpcep by opendaylight.

the class MatchAsPathSetHandler method matchAsPathSetCondition.

private boolean matchAsPathSetCondition(final AsPath asPath, final String asPathSetName, final MatchSetOptionsType matchSetOptions) {
    if (asPath == null) {
        return false;
    }
    final AsPathSet asPathSetFilter = this.sets.getUnchecked(StringUtils.substringBetween(asPathSetName, "=\"", "\""));
    final List<Segments> segments = asPath.getSegments();
    if (asPathSetFilter == null || segments == null) {
        return false;
    }
    final List<AsNumber> l1 = segments.stream().map(AsPathSegment::getAsSequence).filter(Objects::nonNull).flatMap(Collection::stream).filter(Objects::nonNull).collect(Collectors.toList());
    final List<AsNumber> l2 = segments.stream().map(AsPathSegment::getAsSet).filter(Objects::nonNull).flatMap(Collection::stream).filter(Objects::nonNull).collect(Collectors.toList());
    List<AsNumber> allAs = Stream.of(l1, l2).flatMap(Collection::stream).collect(Collectors.toList());
    final List<AsNumber> asPathSetFilterList = asPathSetFilter.getAsPathSetMember();
    if (matchSetOptions.equals(MatchSetOptionsType.ALL)) {
        return allAs.containsAll(asPathSetFilterList) && asPathSetFilterList.containsAll(allAs);
    }
    final boolean noneInCommon = Collections.disjoint(allAs, asPathSetFilterList);
    if (matchSetOptions.equals(MatchSetOptionsType.ANY)) {
        return !noneInCommon;
    }
    // (matchSetOptions.equals(MatchSetOptionsType.INVERT))
    return noneInCommon;
}

Example 7 with Segments

use of org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev200120.path.attributes.attributes.as.path.Segments in project bgpcep by opendaylight.

the class AbstractPrependAsPath method prependAS.

private static List<Segments> prependAS(final List<Segments> oldSegments, final AsNumber as) {
    if (oldSegments == null || oldSegments.isEmpty()) {
        return ImmutableList.of(singleSequence(as));
    }
    /*
         * We need to check the first segment.
         * If it has as-set then new as-sequence with local AS is prepended.
         * If it has as-sequence, we may add local AS when it has less than 255 elements.
         * Otherwise we need to create new as-sequence for local AS.
         */
    final Iterator<Segments> it = oldSegments.iterator();
    final Segments firstSegment = it.next();
    final List<AsNumber> firstAsSequence = firstSegment.getAsSequence();
    final List<Segments> newSegments;
    if (firstAsSequence != null && firstAsSequence.size() < Values.UNSIGNED_BYTE_MAX_VALUE) {
        final ArrayList<AsNumber> newAsSequence = new ArrayList<>(firstAsSequence.size() + 1);
        newAsSequence.add(as);
        newAsSequence.addAll(firstAsSequence);
        newSegments = new ArrayList<>(oldSegments.size());
        newSegments.add(new SegmentsBuilder().setAsSequence(newAsSequence).build());
    } else {
        newSegments = new ArrayList<>(oldSegments.size() + 1);
        newSegments.add(singleSequence(as));
        newSegments.add(firstSegment);
    }
    it.forEachRemaining(newSegments::add);
    return newSegments;
}

Example 8 with Segments

use of org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev200120.path.attributes.attributes.as.path.Segments in project bgpcep by opendaylight.

the class AsPathAttributeParser method parseAsPath.

/**
 * Parses AS_PATH from bytes.
 *
 * @param refCache ReferenceCache shared reference of object
 * @param buffer bytes to be parsed
 * @return new ASPath object
 * @throws BGPDocumentedException if there is no AS_SEQUENCE present (mandatory)
 */
private static AsPath parseAsPath(final ReferenceCache refCache, final ByteBuf buffer, final RevisedErrorHandling errorHandling) throws BGPDocumentedException, BGPTreatAsWithdrawException {
    if (!buffer.isReadable()) {
        return EMPTY;
    }
    final List<Segments> ases = new ArrayList<>();
    boolean isSequence = false;
    for (int readable = buffer.readableBytes(); readable != 0; readable = buffer.readableBytes()) {
        if (readable < 2) {
            throw errorHandling.reportError(BGPError.AS_PATH_MALFORMED, "Insufficient AS PATH segment header length %s", readable);
        }
        final int type = buffer.readUnsignedByte();
        final SegmentType segmentType = AsPathSegmentParser.parseType(type);
        if (segmentType == null) {
            throw errorHandling.reportError(BGPError.AS_PATH_MALFORMED, "Unknown AS PATH segment type %s", type);
        }
        final int count = buffer.readUnsignedByte();
        if (count == 0 && errorHandling != RevisedErrorHandling.NONE) {
            throw new BGPTreatAsWithdrawException(BGPError.AS_PATH_MALFORMED, "Empty AS_PATH segment");
        }
        // We read 2 bytes of header at this point
        readable -= 2;
        final int segmentLength = count * AsPathSegmentParser.AS_NUMBER_LENGTH;
        if (segmentLength > readable) {
            throw errorHandling.reportError(BGPError.AS_PATH_MALFORMED, "Calculated segment length %s would overflow available buffer %s", segmentLength, readable);
        }
        final List<AsNumber> asList = AsPathSegmentParser.parseAsSegment(refCache, count, buffer.readSlice(segmentLength));
        if (segmentType == SegmentType.AS_SEQUENCE) {
            ases.add(new SegmentsBuilder().setAsSequence(asList).build());
            isSequence = true;
        } else {
            ases.add(new SegmentsBuilder().setAsSet(asList).build());
        }
    }
    if (!isSequence) {
        throw errorHandling.reportError(BGPError.AS_PATH_MALFORMED, "AS_SEQUENCE must be present in AS_PATH attribute.");
    }
    return new AsPathBuilder().setSegments(ImmutableList.copyOf(ases)).build();
}

Example 9 with Segments

use of org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev200120.path.attributes.attributes.as.path.Segments in project bgpcep by opendaylight.

the class BGPMessageParserMockTest method fillMessages.

/**
 * Helper method to fill messages variable.
 *
 * @param asn this parameter is passed to ASNumber constructor
 */
private static Update fillMessages(final long asn) {
    final UpdateBuilder builder = new UpdateBuilder();
    final List<Segments> asPath = new ArrayList<>();
    asPath.add(new SegmentsBuilder().setAsSequence(Lists.newArrayList(new AsNumber(Uint32.valueOf(asn)))).build());
    final CNextHop nextHop = new Ipv6NextHopCaseBuilder().setIpv6NextHop(new Ipv6NextHopBuilder().setGlobal(new Ipv6AddressNoZone("2001:db8::1")).setLinkLocal(new Ipv6AddressNoZone("fe80::c001:bff:fe7e:0")).build()).build();
    final Ipv6Prefix pref1 = new Ipv6Prefix("2001:db8:1:2::/64");
    final Ipv6Prefix pref2 = new Ipv6Prefix("2001:db8:1:1::/64");
    final Ipv6Prefix pref3 = new Ipv6Prefix("2001:db8:1::/64");
    final AttributesBuilder paBuilder = new AttributesBuilder();
    paBuilder.setOrigin(new OriginBuilder().setValue(BgpOrigin.Igp).build());
    paBuilder.setAsPath(new AsPathBuilder().setSegments(asPath).build());
    final MpReachNlriBuilder mpReachBuilder = new MpReachNlriBuilder();
    mpReachBuilder.setAfi(Ipv6AddressFamily.class);
    mpReachBuilder.setSafi(UnicastSubsequentAddressFamily.class);
    mpReachBuilder.setCNextHop(nextHop);
    mpReachBuilder.setAdvertizedRoutes(new AdvertizedRoutesBuilder().setDestinationType(new DestinationIpv6CaseBuilder().setDestinationIpv6(new DestinationIpv6Builder().setIpv6Prefixes(Lists.newArrayList(new Ipv6PrefixesBuilder().setPrefix(pref1).build(), new Ipv6PrefixesBuilder().setPrefix(pref2).build(), new Ipv6PrefixesBuilder().setPrefix(pref3).build())).build()).build()).build());
    paBuilder.addAugmentation(new AttributesReachBuilder().setMpReachNlri(mpReachBuilder.build()).build());
    builder.setAttributes(paBuilder.build());
    return builder.build();
}

Example 10 with Segments

use of org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev200120.path.attributes.attributes.as.path.Segments in project bgpcep by opendaylight.

the class BestPathStateImpl method extractSegments.

private List<Segments> extractSegments(final UnkeyedListNode segments, final NamespaceSpecificIds ids) {
    // list segments
    final List<Segments> extracted = new ArrayList<>();
    for (final UnkeyedListEntryNode segment : segments.body()) {
        final SegmentsBuilder sb = new SegmentsBuilder();
        // We are expecting that segment contains either as-sequence or as-set,
        // so just one of them will be set, other would be null
        sb.setAsSequence(extractAsList(segment, ids.asSeqNid)).setAsSet(extractAsList(segment, ids.asSetNid));
        extracted.add(sb.build());
    }
    return extracted;
}