Exemplo n.º 1
0
//AddLocalProtoRoute is used to add local endpoint to the protocol RIB
func (self *OfnetBgp) AddLocalProtoRoute(pathInfo []*OfnetProtoRouteInfo) error {

	if self.routerIP == "" {
		//ignoring populating to the bgp rib because
		//Bgp is not configured.
		return nil
	}
	log.Infof("Received AddLocalProtoRoute to add local endpoint to protocol RIB: %+v", pathInfo)

	// add routes
	attrs := []bgp.PathAttributeInterface{
		bgp.NewPathAttributeOrigin(1),
		bgp.NewPathAttributeNextHop(pathInfo[0].nextHopIP),
		bgp.NewPathAttributeAsPath([]bgp.AsPathParamInterface{bgp.NewAs4PathParam(bgp.BGP_ASPATH_ATTR_TYPE_SEQ, []uint32{self.myBgpAs})}),
	}
	paths := []*table.Path{}
	for _, path := range pathInfo {
		paths = append(paths, table.NewPath(nil, bgp.NewIPAddrPrefix(32, path.localEpIP), false, attrs, time.Now(), false))
	}

	_, err := self.bgpServer.AddPath("", paths)
	if err != nil {
		return err
	}

	return nil
}
Exemplo n.º 2
0
func createPathFromIPRouteMessage(m *zebra.Message) *table.Path {

	header := m.Header
	body := m.Body.(*zebra.IPRouteBody)
	family := bgp.RF_IPv6_UC
	if header.Command == zebra.IPV4_ROUTE_ADD || header.Command == zebra.IPV4_ROUTE_DELETE {
		family = bgp.RF_IPv4_UC
	}

	var nlri bgp.AddrPrefixInterface
	pattr := make([]bgp.PathAttributeInterface, 0)
	var mpnlri *bgp.PathAttributeMpReachNLRI
	var isWithdraw bool = header.Command == zebra.IPV4_ROUTE_DELETE || header.Command == zebra.IPV6_ROUTE_DELETE

	origin := bgp.NewPathAttributeOrigin(bgp.BGP_ORIGIN_ATTR_TYPE_IGP)
	pattr = append(pattr, origin)

	log.WithFields(log.Fields{
		"Topic":        "Zebra",
		"RouteType":    body.Type.String(),
		"Flag":         body.Flags.String(),
		"Message":      body.Message,
		"Prefix":       body.Prefix,
		"PrefixLength": body.PrefixLength,
		"Nexthop":      body.Nexthops,
		"IfIndex":      body.Ifindexs,
		"Metric":       body.Metric,
		"Distance":     body.Distance,
		"api":          header.Command.String(),
	}).Debugf("create path from ip route message.")

	switch family {
	case bgp.RF_IPv4_UC:
		nlri = bgp.NewIPAddrPrefix(body.PrefixLength, body.Prefix.String())
		nexthop := bgp.NewPathAttributeNextHop(body.Nexthops[0].String())
		pattr = append(pattr, nexthop)
	case bgp.RF_IPv6_UC:
		nlri = bgp.NewIPv6AddrPrefix(body.PrefixLength, body.Prefix.String())
		mpnlri = bgp.NewPathAttributeMpReachNLRI(body.Nexthops[0].String(), []bgp.AddrPrefixInterface{nlri})
		pattr = append(pattr, mpnlri)
	default:
		log.WithFields(log.Fields{
			"Topic": "Zebra",
		}).Errorf("unsupport address family: %s", family)
		return nil
	}

	med := bgp.NewPathAttributeMultiExitDisc(body.Metric)
	pattr = append(pattr, med)

	path := table.NewPath(nil, nlri, isWithdraw, pattr, time.Now(), false)
	path.SetIsFromExternal(true)
	return path
}
Exemplo n.º 3
0
func (bs *BgpService) DelPath(route string) error {
	attrs := []bgp.PathAttributeInterface{
		bgp.NewPathAttributeNextHop("0.0.0.0"),
	}

	if err := bs.bgp.DeletePath([]byte{}, bgp.RF_IPv4_UC, "", []*table.Path{table.NewPath(nil, bgp.NewIPAddrPrefix(32, route), true, attrs, time.Now(), false)}); err != nil {
		return fmt.Errorf("[bgp] Error deleting bgp path. %v", err)
	}

	return nil
}
Exemplo n.º 4
0
func (bs *BgpService) AddPath(route string) error {
	attrs := []bgp.PathAttributeInterface{
		bgp.NewPathAttributeOrigin(0),
		bgp.NewPathAttributeNextHop("0.0.0.0"),
	}

	if _, err := bs.bgp.AddPath("", []*table.Path{table.NewPath(nil, bgp.NewIPAddrPrefix(32, route), false, attrs, time.Now(), false)}); err != nil {
		return fmt.Errorf("[bgp] Error adding bgp path. %v", err)
	}

	return nil
}
Exemplo n.º 5
0
func createPathFromIPRouteMessage(m *zebra.Message, peerInfo *table.PeerInfo) *table.Path {

	header := m.Header
	body := m.Body.(*zebra.IPRouteBody)
	isV4 := header.Command == zebra.IPV4_ROUTE_ADD || header.Command == zebra.IPV4_ROUTE_DELETE

	var nlri bgp.AddrPrefixInterface
	pattr := make([]bgp.PathAttributeInterface, 0)
	var mpnlri *bgp.PathAttributeMpReachNLRI
	var isWithdraw bool = header.Command == zebra.IPV4_ROUTE_DELETE || header.Command == zebra.IPV6_ROUTE_DELETE

	origin := bgp.NewPathAttributeOrigin(bgp.BGP_ORIGIN_ATTR_TYPE_IGP)
	pattr = append(pattr, origin)

	log.WithFields(log.Fields{
		"Topic":        "Zebra",
		"RouteType":    body.Type.String(),
		"Flag":         body.Flags.String(),
		"Message":      body.Message,
		"Prefix":       body.Prefix,
		"PrefixLength": body.PrefixLength,
		"Nexthop":      body.Nexthops,
		"IfIndex":      body.Ifindexs,
		"Metric":       body.Metric,
		"Distance":     body.Distance,
		"api":          header.Command.String(),
	}).Debugf("create path from ip route message.")

	if isV4 {
		nlri = bgp.NewIPAddrPrefix(body.PrefixLength, body.Prefix.String())
		nexthop := bgp.NewPathAttributeNextHop(body.Nexthops[0].String())
		pattr = append(pattr, nexthop)
	} else {
		nlri = bgp.NewIPv6AddrPrefix(body.PrefixLength, body.Prefix.String())
		mpnlri = bgp.NewPathAttributeMpReachNLRI(body.Nexthops[0].String(), []bgp.AddrPrefixInterface{nlri})
		pattr = append(pattr, mpnlri)
	}

	med := bgp.NewPathAttributeMultiExitDisc(body.Metric)
	pattr = append(pattr, med)

	p := table.NewPath(peerInfo, nlri, isWithdraw, pattr, false, time.Now(), false)
	p.IsFromZebra = true
	return p
}
Exemplo n.º 6
0
//DeleteLocalProtoRoute withdraws local endpoints from protocol RIB
func (self *OfnetBgp) DeleteLocalProtoRoute(pathInfo []*OfnetProtoRouteInfo) error {

	log.Infof("Received DeleteLocalProtoRoute to withdraw local endpoint to protocol RIB: %v", pathInfo)

	attrs := []bgp.PathAttributeInterface{
		bgp.NewPathAttributeOrigin(1),
		bgp.NewPathAttributeNextHop(pathInfo[0].nextHopIP),
		bgp.NewPathAttributeAsPath([]bgp.AsPathParamInterface{bgp.NewAs4PathParam(bgp.BGP_ASPATH_ATTR_TYPE_SEQ, []uint32{self.myBgpAs})}),
	}
	paths := []*table.Path{}
	for _, path := range pathInfo {
		paths = append(paths, table.NewPath(nil, bgp.NewIPAddrPrefix(32, path.localEpIP), true, attrs, time.Now(), false))
	}
	if err := self.bgpServer.DeletePath(nil, bgp.RF_IPv4_UC, "", paths); err != nil {
		return err
	}

	return nil
}
Exemplo n.º 7
0
Arquivo: util.go Projeto: osrg/gobgp
func (p *Path) ToNativePath(option ...ToNativeOption) (*table.Path, error) {
	info := &table.PeerInfo{
		AS:      p.SourceAsn,
		ID:      net.ParseIP(p.SourceId),
		Address: net.ParseIP(p.NeighborIp),
	}
	var nlri bgp.AddrPrefixInterface
	for _, o := range option {
		info.LocalAS = o.LocalAS
		info.LocalID = o.LocalID
		info.RouteReflectorClient = o.RouteReflectorClient
		info.RouteReflectorClusterID = o.RouteReflectorClusterID
		nlri = o.NLRI
	}
	if nlri == nil {
		var err error
		nlri, err = getNLRI(bgp.RouteFamily(p.Family), p.Nlri)
		if err != nil {
			return nil, err
		}
	}
	pattr := make([]bgp.PathAttributeInterface, 0, len(p.Pattrs))
	for _, attr := range p.Pattrs {
		p, err := bgp.GetPathAttribute(attr)
		if err != nil {
			return nil, err
		}
		err = p.DecodeFromBytes(attr)
		if err != nil {
			return nil, err
		}
		pattr = append(pattr, p)
	}
	t := time.Unix(p.Age, 0)
	path := table.NewPath(info, nlri, p.IsWithdraw, pattr, t, false)
	path.SetValidation(config.IntToRpkiValidationResultTypeMap[int(p.Validation)])
	path.MarkStale(p.Stale)
	if p.Filtered {
		path.Filter("", table.POLICY_DIRECTION_IN)
	}
	return path, nil
}
Exemplo n.º 8
0
func injectMrt(r string, filename string, count int, skip int, onlyBest bool) error {

	var resource api.Resource
	switch r {
	case CMD_GLOBAL:
		resource = api.Resource_GLOBAL
	default:
		return fmt.Errorf("unknown resource type: %s", r)
	}

	file, err := os.Open(filename)
	if err != nil {
		return fmt.Errorf("failed to open file: %s", err)
	}

	idx := 0

	ch := make(chan *api.InjectMrtRequest, 1<<20)

	go func() {

		var peers []*mrt.Peer

		for {
			buf := make([]byte, mrt.MRT_COMMON_HEADER_LEN)
			_, err := file.Read(buf)
			if err == io.EOF {
				break
			} else if err != nil {
				exitWithError(fmt.Errorf("failed to read: %s", err))
			}

			h := &mrt.MRTHeader{}
			err = h.DecodeFromBytes(buf)
			if err != nil {
				exitWithError(fmt.Errorf("failed to parse"))
			}

			buf = make([]byte, h.Len)
			_, err = file.Read(buf)
			if err != nil {
				exitWithError(fmt.Errorf("failed to read"))
			}

			msg, err := mrt.ParseMRTBody(h, buf)
			if err != nil {
				printError(fmt.Errorf("failed to parse: %s", err))
				continue
			}

			if globalOpts.Debug {
				fmt.Println(msg)
			}

			if msg.Header.Type == mrt.TABLE_DUMPv2 {
				subType := mrt.MRTSubTypeTableDumpv2(msg.Header.SubType)
				var rf bgp.RouteFamily
				switch subType {
				case mrt.PEER_INDEX_TABLE:
					peers = msg.Body.(*mrt.PeerIndexTable).Peers
					continue
				case mrt.RIB_IPV4_UNICAST:
					rf = bgp.RF_IPv4_UC
				case mrt.RIB_IPV6_UNICAST:
					rf = bgp.RF_IPv6_UC
				default:
					exitWithError(fmt.Errorf("unsupported subType: %s", subType))
				}

				if peers == nil {
					exitWithError(fmt.Errorf("not found PEER_INDEX_TABLE"))
				}

				rib := msg.Body.(*mrt.Rib)
				nlri := rib.Prefix

				paths := make([]*api.Path, 0, len(rib.Entries))

				for _, e := range rib.Entries {
					if len(peers) < int(e.PeerIndex) {
						exitWithError(fmt.Errorf("invalid peer index: %d (PEER_INDEX_TABLE has only %d peers)\n", e.PeerIndex, len(peers)))
					}

					if !onlyBest {
						path := &api.Path{
							Pattrs:             make([][]byte, 0),
							NoImplicitWithdraw: true,
							SourceAsn:          peers[e.PeerIndex].AS,
							SourceId:           peers[e.PeerIndex].BgpId.String(),
						}

						if rf == bgp.RF_IPv4_UC {
							path.Nlri, _ = nlri.Serialize()
						}

						for _, p := range e.PathAttributes {
							b, err := p.Serialize()
							if err != nil {
								continue
							}
							path.Pattrs = append(path.Pattrs, b)
						}

						paths = append(paths, path)
					}
				}
				if onlyBest {
					paths = func() []*api.Path {
						dst := table.NewDestination(nlri)
						pathList := make([]*table.Path, 0, len(rib.Entries))
						for _, e := range rib.Entries {
							p := table.NewPath(&table.PeerInfo{AS: peers[e.PeerIndex].AS, ID: peers[e.PeerIndex].BgpId}, nlri, false, e.PathAttributes, time.Unix(int64(e.OriginatedTime), 0), false)
							dst.AddNewPath(p)
							pathList = append(pathList, p)
						}
						best, _, _ := dst.Calculate([]string{table.GLOBAL_RIB_NAME})
						for _, p := range pathList {
							if p == best[table.GLOBAL_RIB_NAME] {
								nb, _ := nlri.Serialize()
								return []*api.Path{&api.Path{
									Nlri:               nb,
									NoImplicitWithdraw: true,
									SourceAsn:          p.GetSource().AS,
									SourceId:           p.GetSource().ID.String(),
									Pattrs: func() [][]byte {
										attrs := make([][]byte, 0)
										for _, a := range p.GetPathAttrs() {
											if b, e := a.Serialize(); e == nil {

												attrs = append(attrs, b)
											}
										}
										return attrs
									}(),
								}}
							}
						}
						exitWithError(fmt.Errorf("Can't find the best %v", nlri))
						return []*api.Path{}
					}()
				}

				if idx >= skip {
					ch <- &api.InjectMrtRequest{
						Resource: resource,
						Paths:    paths,
					}
				}

				idx += 1
				if idx == count+skip {
					break
				}
			}
		}

		close(ch)
	}()

	stream, err := client.InjectMrt(context.Background())
	if err != nil {
		return fmt.Errorf("failed to modpath: %s", err)
	}

	for arg := range ch {
		err = stream.Send(arg)
		if err != nil {
			return fmt.Errorf("failed to send: %s", err)
		}
	}

	_, err = stream.CloseAndRecv()
	if err != nil {
		return fmt.Errorf("failed to send: %s", err)
	}
	return nil
}
Exemplo n.º 9
0
Arquivo: mrt.go Projeto: osrg/gobgp
func injectMrt(filename string, count int, skip int, onlyBest bool) error {

	file, err := os.Open(filename)
	if err != nil {
		return fmt.Errorf("failed to open file: %s", err)
	}

	idx := 0

	ch := make(chan []*table.Path, 1<<20)

	go func() {

		var peers []*mrt.Peer

		for {
			buf := make([]byte, mrt.MRT_COMMON_HEADER_LEN)
			_, err := file.Read(buf)
			if err == io.EOF {
				break
			} else if err != nil {
				exitWithError(fmt.Errorf("failed to read: %s", err))
			}

			h := &mrt.MRTHeader{}
			err = h.DecodeFromBytes(buf)
			if err != nil {
				exitWithError(fmt.Errorf("failed to parse"))
			}

			buf = make([]byte, h.Len)
			_, err = file.Read(buf)
			if err != nil {
				exitWithError(fmt.Errorf("failed to read"))
			}

			msg, err := mrt.ParseMRTBody(h, buf)
			if err != nil {
				printError(fmt.Errorf("failed to parse: %s", err))
				continue
			}

			if globalOpts.Debug {
				fmt.Println(msg)
			}

			if msg.Header.Type == mrt.TABLE_DUMPv2 {
				subType := mrt.MRTSubTypeTableDumpv2(msg.Header.SubType)
				switch subType {
				case mrt.PEER_INDEX_TABLE:
					peers = msg.Body.(*mrt.PeerIndexTable).Peers
					continue
				default:
					exitWithError(fmt.Errorf("unsupported subType: %v", subType))
				}

				if peers == nil {
					exitWithError(fmt.Errorf("not found PEER_INDEX_TABLE"))
				}

				rib := msg.Body.(*mrt.Rib)
				nlri := rib.Prefix

				paths := make([]*table.Path, 0, len(rib.Entries))

				for _, e := range rib.Entries {
					if len(peers) < int(e.PeerIndex) {
						exitWithError(fmt.Errorf("invalid peer index: %d (PEER_INDEX_TABLE has only %d peers)\n", e.PeerIndex, len(peers)))
					}
					source := &table.PeerInfo{
						AS: peers[e.PeerIndex].AS,
						ID: peers[e.PeerIndex].BgpId,
					}
					t := time.Unix(int64(e.OriginatedTime), 0)
					paths = append(paths, table.NewPath(source, nlri, false, e.PathAttributes, t, false))
				}

				if onlyBest {
					dst := table.NewDestination(nlri)
					for _, p := range paths {
						dst.AddNewPath(p)
					}
					best, _, _ := dst.Calculate([]string{table.GLOBAL_RIB_NAME})
					if best[table.GLOBAL_RIB_NAME] == nil {
						exitWithError(fmt.Errorf("Can't find the best %v", nlri))
					}
					paths = []*table.Path{best[table.GLOBAL_RIB_NAME]}
				}

				if idx >= skip {
					ch <- paths
				}

				idx += 1
				if idx == count+skip {
					break
				}
			}
		}

		close(ch)
	}()

	stream, err := client.AddPathByStream()
	if err != nil {
		return fmt.Errorf("failed to modpath: %s", err)
	}

	for paths := range ch {
		err = stream.Send(paths...)
		if err != nil {
			return fmt.Errorf("failed to send: %s", err)
		}
	}

	if err := stream.Close(); err != nil {
		return fmt.Errorf("failed to send: %s", err)
	}
	return nil
}
Exemplo n.º 10
0
func TestMonitor(test *testing.T) {
	assert := assert.New(test)
	s := NewBgpServer()
	go s.Serve()
	s.Start(&config.Global{
		Config: config.GlobalConfig{
			As:       1,
			RouterId: "1.1.1.1",
			Port:     10179,
		},
	})
	n := &config.Neighbor{
		Config: config.NeighborConfig{
			NeighborAddress: "127.0.0.1",
			PeerAs:          2,
		},
		Transport: config.Transport{
			Config: config.TransportConfig{
				PassiveMode: true,
			},
		},
	}
	if err := s.AddNeighbor(n); err != nil {
		log.Fatal(err)
	}
	t := NewBgpServer()
	go t.Serve()
	t.Start(&config.Global{
		Config: config.GlobalConfig{
			As:       2,
			RouterId: "2.2.2.2",
			Port:     -1,
		},
	})
	m := &config.Neighbor{
		Config: config.NeighborConfig{
			NeighborAddress: "127.0.0.1",
			PeerAs:          1,
		},
		Transport: config.Transport{
			Config: config.TransportConfig{
				RemotePort: 10179,
			},
		},
	}
	if err := t.AddNeighbor(m); err != nil {
		log.Fatal(err)
	}

	for {
		time.Sleep(time.Second)
		if t.GetNeighbor(false)[0].State.SessionState == config.SESSION_STATE_ESTABLISHED {
			break
		}
	}

	w := s.Watch(WatchBestPath())

	attrs := []bgp.PathAttributeInterface{
		bgp.NewPathAttributeOrigin(0),
		bgp.NewPathAttributeNextHop("10.0.0.1"),
	}
	if _, err := t.AddPath("", []*table.Path{table.NewPath(nil, bgp.NewIPAddrPrefix(24, "10.0.0.0"), false, attrs, time.Now(), false)}); err != nil {
		log.Fatal(err)
	}

	ev := <-w.Event()
	b := ev.(*WatchEventBestPath)
	assert.Equal(len(b.PathList), 1)
	assert.Equal(b.PathList[0].GetNlri().String(), "10.0.0.0/24")
	assert.Equal(b.PathList[0].IsWithdraw, false)

	if _, err := t.AddPath("", []*table.Path{table.NewPath(nil, bgp.NewIPAddrPrefix(24, "10.0.0.0"), true, attrs, time.Now(), false)}); err != nil {
		log.Fatal(err)
	}

	ev = <-w.Event()
	b = ev.(*WatchEventBestPath)
	assert.Equal(len(b.PathList), 1)
	assert.Equal(b.PathList[0].GetNlri().String(), "10.0.0.0/24")
	assert.Equal(b.PathList[0].IsWithdraw, true)

}
Exemplo n.º 11
0
func (s *Server) api2PathList(resource Resource, ApiPathList []*Path) ([]*table.Path, error) {
	var nlri bgp.AddrPrefixInterface
	var nexthop string
	var pi *table.PeerInfo

	pathList := make([]*table.Path, 0, len(ApiPathList))
	for _, path := range ApiPathList {
		seen := make(map[bgp.BGPAttrType]bool)

		pattr := make([]bgp.PathAttributeInterface, 0)
		extcomms := make([]bgp.ExtendedCommunityInterface, 0)

		if path.SourceAsn != 0 {
			pi = &table.PeerInfo{
				AS:      path.SourceAsn,
				LocalID: net.ParseIP(path.SourceId),
			}
		}

		if len(path.Nlri) > 0 {
			nlri = &bgp.IPAddrPrefix{}
			err := nlri.DecodeFromBytes(path.Nlri)
			if err != nil {
				return nil, err
			}
		}

		for _, attr := range path.Pattrs {
			p, err := bgp.GetPathAttribute(attr)
			if err != nil {
				return nil, err
			}

			err = p.DecodeFromBytes(attr)
			if err != nil {
				return nil, err
			}

			if _, ok := seen[p.GetType()]; !ok {
				seen[p.GetType()] = true
			} else {
				return nil, fmt.Errorf("the path attribute apears twice. Type : " + strconv.Itoa(int(p.GetType())))
			}
			switch p.GetType() {
			case bgp.BGP_ATTR_TYPE_NEXT_HOP:
				nexthop = p.(*bgp.PathAttributeNextHop).Value.String()
			case bgp.BGP_ATTR_TYPE_EXTENDED_COMMUNITIES:
				value := p.(*bgp.PathAttributeExtendedCommunities).Value
				if len(value) > 0 {
					extcomms = append(extcomms, value...)
				}
			case bgp.BGP_ATTR_TYPE_MP_REACH_NLRI:
				mpreach := p.(*bgp.PathAttributeMpReachNLRI)
				if len(mpreach.Value) != 1 {
					return nil, fmt.Errorf("include only one route in mp_reach_nlri")
				}
				nlri = mpreach.Value[0]
				nexthop = mpreach.Nexthop.String()
			default:
				pattr = append(pattr, p)
			}
		}

		if nlri == nil || nexthop == "" {
			return nil, fmt.Errorf("not found nlri or nexthop")
		}

		rf := bgp.AfiSafiToRouteFamily(nlri.AFI(), nlri.SAFI())

		if resource != Resource_VRF && rf == bgp.RF_IPv4_UC {
			pattr = append(pattr, bgp.NewPathAttributeNextHop(nexthop))
		} else {
			pattr = append(pattr, bgp.NewPathAttributeMpReachNLRI(nexthop, []bgp.AddrPrefixInterface{nlri}))
		}

		if len(extcomms) > 0 {
			pattr = append(pattr, bgp.NewPathAttributeExtendedCommunities(extcomms))
		}
		newPath := table.NewPath(pi, nlri, path.IsWithdraw, pattr, time.Now(), path.NoImplicitWithdraw)
		newPath.SetIsFromExternal(path.IsFromExternal)
		pathList = append(pathList, newPath)
	}
	return pathList, nil
}
Exemplo n.º 12
0
Arquivo: global.go Projeto: osrg/gobgp
func ParsePath(rf bgp.RouteFamily, args []string) (*table.Path, error) {
	var nlri bgp.AddrPrefixInterface
	var rd bgp.RouteDistinguisherInterface
	var extcomms []string
	var err error
	attrs := table.PathAttrs(make([]bgp.PathAttributeInterface, 0, 1))

	fns := []func([]string) ([]string, bgp.PathAttributeInterface, error){
		extractOrigin,
		extractMed,
		extractLocalPref,
		extractCommunity,
		extractAigp,
		extractAggregator,
		extractLargeCommunity,
	}

	for _, fn := range fns {
		var a bgp.PathAttributeInterface
		args, a, err = fn(args)
		if err != nil {
			return nil, err
		}
		if a != nil {
			attrs = append(attrs, a)
		}
	}

	args, nexthop, err := extractNexthop(rf, args)
	if err != nil {
		return nil, err
	}

	switch rf {
	case bgp.RF_IPv4_UC, bgp.RF_IPv6_UC:
		if len(args) < 1 {
			return nil, fmt.Errorf("invalid format")
		}
		ip, net, err := net.ParseCIDR(args[0])
		if err != nil {
			return nil, err
		}
		ones, _ := net.Mask.Size()
		if rf == bgp.RF_IPv4_UC {
			if ip.To4() == nil {
				return nil, fmt.Errorf("invalid ipv4 prefix")
			}
			nlri = bgp.NewIPAddrPrefix(uint8(ones), ip.String())
		} else {
			if ip.To16() == nil {
				return nil, fmt.Errorf("invalid ipv6 prefix")
			}
			nlri = bgp.NewIPv6AddrPrefix(uint8(ones), ip.String())
		}

		extcomms = args[1:]

	case bgp.RF_IPv4_VPN, bgp.RF_IPv6_VPN:
		if len(args) < 5 || args[1] != "label" || args[3] != "rd" {
			return nil, fmt.Errorf("invalid format")
		}
		ip, net, _ := net.ParseCIDR(args[0])
		ones, _ := net.Mask.Size()

		label := 0
		if label, err = strconv.Atoi(args[2]); err != nil {
			return nil, fmt.Errorf("invalid format")
		}
		mpls := bgp.NewMPLSLabelStack(uint32(label))

		rd, err = bgp.ParseRouteDistinguisher(args[4])
		if err != nil {
			return nil, err
		}

		extcomms = args[5:]

		if rf == bgp.RF_IPv4_VPN {
			if ip.To4() == nil {
				return nil, fmt.Errorf("invalid ipv4 prefix")
			}
			nlri = bgp.NewLabeledVPNIPAddrPrefix(uint8(ones), ip.String(), *mpls, rd)
		} else {
			if ip.To16() == nil {
				return nil, fmt.Errorf("invalid ipv6 prefix")
			}
			nlri = bgp.NewLabeledVPNIPv6AddrPrefix(uint8(ones), ip.String(), *mpls, rd)
		}
	case bgp.RF_IPv4_MPLS, bgp.RF_IPv6_MPLS:
		if len(args) < 2 {
			return nil, fmt.Errorf("invalid format")
		}

		ip, net, _ := net.ParseCIDR(args[0])
		ones, _ := net.Mask.Size()

		mpls, err := bgp.ParseMPLSLabelStack(args[1])
		if err != nil {
			return nil, err
		}

		extcomms = args[2:]

		if rf == bgp.RF_IPv4_MPLS {
			if ip.To4() == nil {
				return nil, fmt.Errorf("invalid ipv4 prefix")
			}
			nlri = bgp.NewLabeledIPAddrPrefix(uint8(ones), ip.String(), *mpls)
		} else {
			if ip.To4() != nil {
				return nil, fmt.Errorf("invalid ipv6 prefix")
			}
			nlri = bgp.NewLabeledIPv6AddrPrefix(uint8(ones), ip.String(), *mpls)
		}
	case bgp.RF_EVPN:
		nlri, extcomms, err = ParseEvpnArgs(args)
	case bgp.RF_FS_IPv4_VPN, bgp.RF_FS_IPv6_VPN, bgp.RF_FS_L2_VPN:
		args, rd, err = extractRouteDistinguisher(args)
		if err != nil {
			return nil, err
		}
		fallthrough
	case bgp.RF_FS_IPv4_UC, bgp.RF_FS_IPv6_UC:
		nlri, extcomms, err = ParseFlowSpecArgs(rf, args, rd)
	case bgp.RF_OPAQUE:
		m := extractReserved(args, []string{"key", "value"})
		if len(m["key"]) != 1 {
			return nil, fmt.Errorf("opaque nlri key missing")
		}
		if len(m["value"]) > 0 {
			nlri = bgp.NewOpaqueNLRI([]byte(m["key"][0]), []byte(m["value"][0]))
		} else {
			nlri = bgp.NewOpaqueNLRI([]byte(m["key"][0]), nil)
		}
	default:
		return nil, fmt.Errorf("Unsupported route family: %s", rf)
	}
	if err != nil {
		return nil, err
	}

	if rf == bgp.RF_IPv4_UC {
		attrs = append(attrs, bgp.NewPathAttributeNextHop(nexthop))
	} else {
		mpreach := bgp.NewPathAttributeMpReachNLRI(nexthop, []bgp.AddrPrefixInterface{nlri})
		attrs = append(attrs, mpreach)
	}

	if extcomms != nil && len(extcomms) > 0 {
		extcomms, err := ParseExtendedCommunities(strings.Join(extcomms, " "))
		if err != nil {
			return nil, err
		}
		p := bgp.NewPathAttributeExtendedCommunities(extcomms)
		attrs = append(attrs, p)
	}

	sort.Sort(attrs)

	return table.NewPath(nil, nlri, false, attrs, time.Now(), false), nil
}
Exemplo n.º 13
0
func Test_createRequestFromIPRouteMessage(t *testing.T) {
	assert := assert.New(t)

	m := &zebra.Message{}
	h := &zebra.Header{
		Len:     zebra.HEADER_SIZE,
		Marker:  zebra.HEADER_MARKER,
		Version: zebra.VERSION,
		Command: zebra.IPV4_ROUTE_ADD,
	}

	b := &zebra.IPRouteBody{
		Type:         zebra.ROUTE_TYPE(zebra.ROUTE_STATIC),
		Flags:        zebra.FLAG(zebra.FLAG_SELECTED),
		Message:      zebra.MESSAGE_NEXTHOP | zebra.MESSAGE_DISTANCE | zebra.MESSAGE_METRIC,
		SAFI:         zebra.SAFI(zebra.SAFI_UNICAST),
		Prefix:       net.ParseIP("192.168.100.0"),
		PrefixLength: uint8(24),
		Nexthops:     []net.IP{net.ParseIP("0.0.0.0")},
		Ifindexs:     []uint32{1},
		Distance:     uint8(0),
		Metric:       uint32(100),
		Api:          zebra.API_TYPE(zebra.IPV4_ROUTE_ADD),
	}

	m.Header = *h
	m.Body = b

	p := createRequestFromIPRouteMessage(m)
	assert.NotNil(p)
	paths, err := cmd.ApiStruct2Path(p.Path)
	assert.Nil(err)
	assert.Equal(len(paths), 1)
	path := paths[0]
	pp := table.NewPath(nil, path.Nlri, path.IsWithdraw, path.PathAttrs, time.Now(), false)
	pp.SetIsFromExternal(p.Path.IsFromExternal)
	assert.Equal("0.0.0.0", pp.GetNexthop().String())
	assert.Equal("192.168.100.0/24", pp.GetNlri().String())
	assert.True(pp.IsFromExternal())
	assert.False(pp.IsWithdraw)

	// withdraw
	h.Command = zebra.IPV4_ROUTE_DELETE
	m.Header = *h
	p = createRequestFromIPRouteMessage(m)
	assert.NotNil(p)
	paths, err = cmd.ApiStruct2Path(p.Path)
	assert.Nil(err)
	assert.Equal(len(paths), 1)
	path = paths[0]
	pp = table.NewPath(nil, path.Nlri, path.IsWithdraw, path.PathAttrs, time.Now(), false)
	pp.SetIsFromExternal(p.Path.IsFromExternal)
	assert.Equal("0.0.0.0", pp.GetNexthop().String())
	assert.Equal("192.168.100.0/24", pp.GetNlri().String())
	med, _ := pp.GetMed()
	assert.Equal(uint32(100), med)
	assert.True(pp.IsFromExternal())
	assert.True(pp.IsWithdraw)

	// IPv6
	h.Command = zebra.IPV6_ROUTE_ADD
	b.Prefix = net.ParseIP("2001:db8:0:f101::")
	b.PrefixLength = uint8(64)
	b.Nexthops = []net.IP{net.ParseIP("::")}
	m.Header = *h
	m.Body = b

	p = createRequestFromIPRouteMessage(m)
	assert.NotNil(p)
	paths, err = cmd.ApiStruct2Path(p.Path)
	assert.Nil(err)
	assert.Equal(len(paths), 1)
	path = paths[0]
	pp = table.NewPath(nil, path.Nlri, path.IsWithdraw, path.PathAttrs, time.Now(), false)
	pp.SetIsFromExternal(p.Path.IsFromExternal)
	assert.Equal("::", pp.GetNexthop().String())
	assert.Equal("2001:db8:0:f101::/64", pp.GetNlri().String())
	med, _ = pp.GetMed()
	assert.Equal(uint32(100), med)
	assert.True(pp.IsFromExternal())
	assert.False(pp.IsWithdraw)

	// withdraw
	h.Command = zebra.IPV6_ROUTE_DELETE
	m.Header = *h
	p = createRequestFromIPRouteMessage(m)
	assert.NotNil(p)
	paths, err = cmd.ApiStruct2Path(p.Path)
	assert.Nil(err)
	assert.Equal(len(paths), 1)
	path = paths[0]
	pp = table.NewPath(nil, path.Nlri, path.IsWithdraw, path.PathAttrs, time.Now(), false)
	pp.SetIsFromExternal(p.Path.IsFromExternal)
	assert.Equal("::", pp.GetNexthop().String())
	assert.Equal("2001:db8:0:f101::/64", pp.GetNlri().String())
	assert.True(pp.IsFromExternal())
	assert.True(pp.IsWithdraw)
}
Exemplo n.º 14
0
// Test adding/deleting Vlrouter routes
func TestOfnetBgpVlrouteAddDelete(t *testing.T) {

	neighborAs := "500"
	peer := "50.1.1.3"
	routerIP := "50.1.1.2/24"
	as := "65002"
	//Add Bgp neighbor and check if it is successful

	for i := 0; i < NUM_VLRTR_AGENT; i++ {
		err := vlrtrAgents[i].AddBgp(routerIP, as, neighborAs, peer)
		time.Sleep(5 * time.Second)
		if err != nil {
			t.Errorf("Error adding Bgp Neighbor: %v", err)
			return
		}
		attrs := []bgp.PathAttributeInterface{
			bgp.NewPathAttributeOrigin(1),
			bgp.NewPathAttributeNextHop("50.1.1.3"),
			bgp.NewPathAttributeAsPath([]bgp.AsPathParamInterface{bgp.NewAs4PathParam(bgp.BGP_ASPATH_ATTR_TYPE_SEQ, []uint32{65002})}),
		}

		path := table.NewPath(nil, bgp.NewIPAddrPrefix(32, "20.20.20.20"), false, attrs, time.Now(), false)

		vlrtrAgents[i].protopath.ModifyProtoRib(path)
		log.Infof("Adding path to the Bgp Rib")
		time.Sleep(2 * time.Second)

		// verify flow entry exists
		brName := "vlrtrBridge" + fmt.Sprintf("%d", i)

		flowList, err := ofctlFlowDump(brName)
		if err != nil {
			t.Errorf("Error getting flow entries. Err: %v", err)
		}
		ipFlowMatch := fmt.Sprintf("priority=100,ip,nw_dst=20.20.20.20")
		ipTableId := IP_TBL_ID
		if !ofctlFlowMatch(flowList, ipTableId, ipFlowMatch) {
			t.Errorf("Could not find the route %s on ovs %s", ipFlowMatch, brName)
			return
		}
		log.Infof("Found ipflow %s on ovs %s", ipFlowMatch, brName)

		// withdraw the route
		path.IsWithdraw = true
		vlrtrAgents[i].protopath.ModifyProtoRib(path)
		log.Infof("Withdrawing route from BGP rib")

		// verify flow entry exists
		brName = "vlrtrBridge" + fmt.Sprintf("%d", i)

		flowList, err = ofctlFlowDump(brName)
		if err != nil {
			t.Errorf("Error getting flow entries. Err: %v", err)
		}

		ipFlowMatch = fmt.Sprintf("priority=100,ip,nw_dst=20.20.20.20")
		ipTableId = IP_TBL_ID
		if ofctlFlowMatch(flowList, ipTableId, ipFlowMatch) {
			t.Errorf("Found the route %s on ovs %s which was withdrawn", ipFlowMatch, brName)
			return
		}
		log.Infof("ipflow %s on ovs %s has been deleted from OVS", ipFlowMatch, brName)
	}
}