func TestPathPrependAsnToExistingSeqAttr(t *testing.T) {
assert := assert.New(t)
origin := bgp.NewPathAttributeOrigin(0)
aspathParam := []bgp.AsPathParamInterface{
bgp.NewAsPathParam(bgp.BGP_ASPATH_ATTR_TYPE_SEQ, []uint16{65001, 65002, 65003, 65004, 65005}),
bgp.NewAsPathParam(bgp.BGP_ASPATH_ATTR_TYPE_SET, []uint16{65001, 65002, 65003, 65004, 65005}),
bgp.NewAsPathParam(bgp.BGP_ASPATH_ATTR_TYPE_CONFED_SEQ, []uint16{65100, 65101, 65102}),
bgp.NewAsPathParam(bgp.BGP_ASPATH_ATTR_TYPE_CONFED_SET, []uint16{65100, 65101})}
aspath := bgp.NewPathAttributeAsPath(aspathParam)
nexthop := bgp.NewPathAttributeNextHop("192.168.50.1")
pathAttributes := []bgp.PathAttributeInterface{
origin,
aspath,
nexthop,
}
nlri := []*bgp.IPAddrPrefix{bgp.NewIPAddrPrefix(24, "10.10.10.0")}
bgpmsg := bgp.NewBGPUpdateMessage(nil, pathAttributes, nlri)
update := bgpmsg.Body.(*bgp.BGPUpdate)
UpdatePathAttrs4ByteAs(update)
peer := PathCreatePeer()
p := NewPath(peer[0], update.NLRI[0], false, update.PathAttributes, time.Now(), false)
p.PrependAsn(65000, 1)
assert.Equal([]uint32{65000, 65001, 65002, 65003, 65004, 65005, 0, 0, 0}, p.GetAsSeqList())
fmt.Printf("asns: %v", p.GetAsSeqList())
}
func TestTimeTieBreaker(t *testing.T) {
origin := bgp.NewPathAttributeOrigin(0)
aspathParam := []bgp.AsPathParamInterface{bgp.NewAs4PathParam(2, []uint32{65001})}
aspath := bgp.NewPathAttributeAsPath(aspathParam)
nexthop := bgp.NewPathAttributeNextHop("10.0.0.1")
med := bgp.NewPathAttributeMultiExitDisc(0)
pathAttributes := []bgp.PathAttributeInterface{origin, aspath, nexthop, med}
nlri := bgp.NewIPAddrPrefix(24, "10.10.0.0")
updateMsg := bgp.NewBGPUpdateMessage(nil, pathAttributes, []*bgp.IPAddrPrefix{nlri})
peer1 := &PeerInfo{AS: 2, LocalAS: 1, Address: net.IP{1, 1, 1, 1}, ID: net.IP{1, 1, 1, 1}}
path1 := ProcessMessage(updateMsg, peer1, time.Now())[0]
peer2 := &PeerInfo{AS: 2, LocalAS: 1, Address: net.IP{2, 2, 2, 2}, ID: net.IP{2, 2, 2, 2}} // weaker router-id
path2 := ProcessMessage(updateMsg, peer2, time.Now().Add(-1*time.Hour))[0] // older than path1
d := NewDestination(nlri)
d.AddNewPath(path1)
d.AddNewPath(path2)
d.Calculate(nil)
assert.Equal(t, len(d.knownPathList), 2)
assert.Equal(t, true, d.GetBestPath("").GetSource().ID.Equal(net.IP{2, 2, 2, 2})) // path from peer2 win
// this option disables tie breaking by age
SelectionOptions.ExternalCompareRouterId = true
d = NewDestination(nlri)
d.AddNewPath(path1)
d.AddNewPath(path2)
d.Calculate(nil)
assert.Equal(t, len(d.knownPathList), 2)
assert.Equal(t, true, d.GetBestPath("").GetSource().ID.Equal(net.IP{1, 1, 1, 1})) // path from peer1 win
}
func TestMrtRibEntry(t *testing.T) {
aspath1 := []bgp.AsPathParamInterface{
bgp.NewAsPathParam(2, []uint16{1000}),
bgp.NewAsPathParam(1, []uint16{1001, 1002}),
bgp.NewAsPathParam(2, []uint16{1003, 1004}),
}
p := []bgp.PathAttributeInterface{
bgp.NewPathAttributeOrigin(3),
bgp.NewPathAttributeAsPath(aspath1),
bgp.NewPathAttributeNextHop("129.1.1.2"),
bgp.NewPathAttributeMultiExitDisc(1 << 20),
bgp.NewPathAttributeLocalPref(1 << 22),
}
e1 := NewRibEntry(1, uint32(time.Now().Unix()), p)
b1, err := e1.Serialize()
if err != nil {
t.Fatal(err)
}
e2 := &RibEntry{}
rest, err := e2.DecodeFromBytes(b1)
if err != nil {
t.Fatal(err)
}
assert.Equal(t, len(rest), 0)
assert.Equal(t, reflect.DeepEqual(e1, e2), true)
}
func TestMrtRib(t *testing.T) {
aspath1 := []bgp.AsPathParamInterface{
bgp.NewAsPathParam(2, []uint16{1000}),
bgp.NewAsPathParam(1, []uint16{1001, 1002}),
bgp.NewAsPathParam(2, []uint16{1003, 1004}),
}
p := []bgp.PathAttributeInterface{
bgp.NewPathAttributeOrigin(3),
bgp.NewPathAttributeAsPath(aspath1),
bgp.NewPathAttributeNextHop("129.1.1.2"),
bgp.NewPathAttributeMultiExitDisc(1 << 20),
bgp.NewPathAttributeLocalPref(1 << 22),
}
e1 := NewRibEntry(1, uint32(time.Now().Unix()), p)
e2 := NewRibEntry(2, uint32(time.Now().Unix()), p)
e3 := NewRibEntry(3, uint32(time.Now().Unix()), p)
r1 := NewRib(1, bgp.NewIPAddrPrefix(24, "192.168.0.0"), []*RibEntry{e1, e2, e3})
b1, err := r1.Serialize()
if err != nil {
t.Fatal(err)
}
r2 := &Rib{
RouteFamily: bgp.RF_IPv4_UC,
}
err = r2.DecodeFromBytes(b1)
if err != nil {
t.Fatal(err)
}
assert.Equal(t, reflect.DeepEqual(r1, r2), true)
}
func (manager *TableManager) AddVrf(name string, id uint32, rd bgp.RouteDistinguisherInterface, importRt, exportRt []bgp.ExtendedCommunityInterface, info *PeerInfo) ([]*Path, error) {
if _, ok := manager.Vrfs[name]; ok {
return nil, fmt.Errorf("vrf %s already exists", name)
}
log.WithFields(log.Fields{
"Topic": "Vrf",
"Key": name,
"Rd": rd,
"ImportRt": importRt,
"ExportRt": exportRt,
}).Debugf("add vrf")
manager.Vrfs[name] = &Vrf{
Name: name,
Id: id,
Rd: rd,
ImportRt: importRt,
ExportRt: exportRt,
}
msgs := make([]*Path, 0, len(importRt))
nexthop := "0.0.0.0"
for _, target := range importRt {
nlri := bgp.NewRouteTargetMembershipNLRI(info.AS, target)
pattr := make([]bgp.PathAttributeInterface, 0, 2)
pattr = append(pattr, bgp.NewPathAttributeOrigin(bgp.BGP_ORIGIN_ATTR_TYPE_IGP))
pattr = append(pattr, bgp.NewPathAttributeMpReachNLRI(nexthop, []bgp.AddrPrefixInterface{nlri}))
msgs = append(msgs, NewPath(info, nlri, false, pattr, time.Now(), false))
}
return msgs, nil
}
//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
}
func TestASPathLen(t *testing.T) {
assert := assert.New(t)
origin := bgp.NewPathAttributeOrigin(0)
aspathParam := []bgp.AsPathParamInterface{
bgp.NewAsPathParam(bgp.BGP_ASPATH_ATTR_TYPE_SEQ, []uint16{65001, 65002, 65003, 65004, 65004, 65004, 65004, 65004, 65005}),
bgp.NewAsPathParam(bgp.BGP_ASPATH_ATTR_TYPE_SET, []uint16{65001, 65002, 65003, 65004, 65005}),
bgp.NewAsPathParam(bgp.BGP_ASPATH_ATTR_TYPE_CONFED_SEQ, []uint16{65100, 65101, 65102}),
bgp.NewAsPathParam(bgp.BGP_ASPATH_ATTR_TYPE_CONFED_SET, []uint16{65100, 65101})}
aspath := bgp.NewPathAttributeAsPath(aspathParam)
nexthop := bgp.NewPathAttributeNextHop("192.168.50.1")
med := bgp.NewPathAttributeMultiExitDisc(0)
pathAttributes := []bgp.PathAttributeInterface{
origin,
aspath,
nexthop,
med,
}
nlri := []*bgp.IPAddrPrefix{bgp.NewIPAddrPrefix(24, "10.10.10.0")}
bgpmsg := bgp.NewBGPUpdateMessage(nil, pathAttributes, nlri)
update := bgpmsg.Body.(*bgp.BGPUpdate)
UpdatePathAttrs4ByteAs(update)
peer := PathCreatePeer()
p := NewPath(peer[0], update.NLRI[0], false, update.PathAttributes, time.Now(), false)
assert.Equal(10, p.GetAsPathLen())
}
func TestImplicitWithdrawCalculate(t *testing.T) {
origin := bgp.NewPathAttributeOrigin(0)
aspathParam := []bgp.AsPathParamInterface{bgp.NewAs4PathParam(2, []uint32{65001})}
aspath := bgp.NewPathAttributeAsPath(aspathParam)
nexthop := bgp.NewPathAttributeNextHop("10.0.0.1")
med := bgp.NewPathAttributeMultiExitDisc(0)
pathAttributes := []bgp.PathAttributeInterface{origin, aspath, nexthop, med}
nlri := bgp.NewIPAddrPrefix(24, "10.10.0.101")
updateMsg := bgp.NewBGPUpdateMessage(nil, pathAttributes, []*bgp.IPAddrPrefix{nlri})
peer1 := &PeerInfo{AS: 1, Address: net.IP{1, 1, 1, 1}}
path1 := ProcessMessage(updateMsg, peer1, time.Now())[0]
path1.Filter("1", POLICY_DIRECTION_IMPORT)
// suppose peer2 has import policy to prepend as-path
action := &AsPathPrependAction{
asn: 100,
repeat: 1,
}
path2 := action.Apply(path1.Clone(false), nil)
path1.Filter("2", POLICY_DIRECTION_IMPORT)
path2.Filter("1", POLICY_DIRECTION_IMPORT)
path2.Filter("3", POLICY_DIRECTION_IMPORT)
d := NewDestination(nlri)
d.AddNewPath(path1)
d.AddNewPath(path2)
d.Calculate(nil)
assert.Equal(t, len(d.GetKnownPathList("1")), 0) // peer "1" is the originator
assert.Equal(t, len(d.GetKnownPathList("2")), 1)
assert.Equal(t, d.GetKnownPathList("2")[0].GetAsString(), "100 65001") // peer "2" has modified path {100, 65001}
assert.Equal(t, len(d.GetKnownPathList("3")), 1)
assert.Equal(t, d.GetKnownPathList("3")[0].GetAsString(), "65001") // peer "3" has original path {65001}
assert.Equal(t, len(d.knownPathList), 2)
// say, we removed peer2's import policy and
// peer1 advertised new path with the same prefix
aspathParam = []bgp.AsPathParamInterface{bgp.NewAs4PathParam(2, []uint32{65001, 65002})}
aspath = bgp.NewPathAttributeAsPath(aspathParam)
pathAttributes = []bgp.PathAttributeInterface{origin, aspath, nexthop, med}
updateMsg = bgp.NewBGPUpdateMessage(nil, pathAttributes, []*bgp.IPAddrPrefix{nlri})
path3 := ProcessMessage(updateMsg, peer1, time.Now())[0]
path3.Filter("1", POLICY_DIRECTION_IMPORT)
d.AddNewPath(path3)
d.Calculate(nil)
assert.Equal(t, len(d.GetKnownPathList("1")), 0) // peer "1" is the originator
assert.Equal(t, len(d.GetKnownPathList("2")), 1)
assert.Equal(t, d.GetKnownPathList("2")[0].GetAsString(), "65001 65002") // peer "2" has new original path {65001, 65002}
assert.Equal(t, len(d.GetKnownPathList("3")), 1)
assert.Equal(t, d.GetKnownPathList("3")[0].GetAsString(), "65001 65002") // peer "3" has new original path {65001, 65002}
assert.Equal(t, len(d.knownPathList), 1)
}
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
}
func TestCalculate2(t *testing.T) {
origin := bgp.NewPathAttributeOrigin(0)
aspathParam := []bgp.AsPathParamInterface{bgp.NewAs4PathParam(2, []uint32{65001})}
aspath := bgp.NewPathAttributeAsPath(aspathParam)
nexthop := bgp.NewPathAttributeNextHop("10.0.0.1")
med := bgp.NewPathAttributeMultiExitDisc(0)
pathAttributes := []bgp.PathAttributeInterface{origin, aspath, nexthop, med}
nlri := bgp.NewIPAddrPrefix(24, "10.10.0.0")
// peer1 sends normal update message 10.10.0.0/24
update1 := bgp.NewBGPUpdateMessage(nil, pathAttributes, []*bgp.IPAddrPrefix{nlri})
peer1 := &PeerInfo{AS: 1, Address: net.IP{1, 1, 1, 1}}
path1 := ProcessMessage(update1, peer1, time.Now())[0]
d := NewDestination(nlri)
d.AddNewPath(path1)
d.Calculate(nil)
// suppose peer2 sends grammaatically correct but semantically flawed update message
// which has a withdrawal nlri not advertised before
update2 := bgp.NewBGPUpdateMessage([]*bgp.IPAddrPrefix{nlri}, pathAttributes, nil)
peer2 := &PeerInfo{AS: 2, Address: net.IP{2, 2, 2, 2}}
path2 := ProcessMessage(update2, peer2, time.Now())[0]
assert.Equal(t, path2.IsWithdraw, true)
d.AddWithdraw(path2)
d.Calculate(nil)
// we have a path from peer1 here
assert.Equal(t, len(d.knownPathList), 1)
// after that, new update with the same nlri comes from peer2
update3 := bgp.NewBGPUpdateMessage(nil, pathAttributes, []*bgp.IPAddrPrefix{nlri})
path3 := ProcessMessage(update3, peer2, time.Now())[0]
assert.Equal(t, path3.IsWithdraw, false)
d.AddNewPath(path3)
d.Calculate(nil)
// this time, we have paths from peer1 and peer2
assert.Equal(t, len(d.knownPathList), 2)
// now peer3 sends normal update message 10.10.0.0/24
peer3 := &PeerInfo{AS: 3, Address: net.IP{3, 3, 3, 3}}
update4 := bgp.NewBGPUpdateMessage(nil, pathAttributes, []*bgp.IPAddrPrefix{nlri})
path4 := ProcessMessage(update4, peer3, time.Now())[0]
d.AddNewPath(path4)
d.Calculate(nil)
// we must have paths from peer1, peer2 and peer3
assert.Equal(t, len(d.knownPathList), 3)
}
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
}
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, time.Now(), false)
p.SetIsFromExternal(true)
return p
}
func updateMsgP2() *bgp.BGPMessage {
origin := bgp.NewPathAttributeOrigin(0)
aspathParam := []bgp.AsPathParamInterface{bgp.NewAsPathParam(2, []uint16{65100})}
aspath := bgp.NewPathAttributeAsPath(aspathParam)
nexthop := bgp.NewPathAttributeNextHop("192.168.100.1")
med := bgp.NewPathAttributeMultiExitDisc(100)
pathAttributes := []bgp.PathAttributeInterface{
origin,
aspath,
nexthop,
med,
}
nlri := []*bgp.IPAddrPrefix{bgp.NewIPAddrPrefix(24, "20.20.20.0")}
return bgp.NewBGPUpdateMessage(nil, pathAttributes, nlri)
}
func extractOrigin(args []string) ([]string, bgp.PathAttributeInterface, error) {
typ := bgp.BGP_ORIGIN_ATTR_TYPE_INCOMPLETE
for idx, arg := range args {
if arg == "origin" && len(args) > (idx+1) {
switch args[idx+1] {
case "igp":
typ = bgp.BGP_ORIGIN_ATTR_TYPE_IGP
case "egp":
typ = bgp.BGP_ORIGIN_ATTR_TYPE_EGP
case "incomplete":
default:
return nil, nil, fmt.Errorf("invalid origin type. expect [igp|egp|incomplete] but %s", args[idx+1])
}
args = append(args[:idx], args[idx+2:]...)
break
}
}
return args, bgp.NewPathAttributeOrigin(uint8(typ)), nil
}
//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
}
func updateMsgD1() *bgp.BGPMessage {
origin := bgp.NewPathAttributeOrigin(0)
aspathParam := []bgp.AsPathParamInterface{bgp.NewAsPathParam(2, []uint16{65000})}
aspath := bgp.NewPathAttributeAsPath(aspathParam)
nexthop := bgp.NewPathAttributeNextHop("192.168.50.1")
med := bgp.NewPathAttributeMultiExitDisc(0)
pathAttributes := []bgp.PathAttributeInterface{
origin,
aspath,
nexthop,
med,
}
nlri := []*bgp.IPAddrPrefix{bgp.NewIPAddrPrefix(24, "10.10.10.0")}
updateMsg := bgp.NewBGPUpdateMessage(nil, pathAttributes, nlri)
UpdatePathAttrs4ByteAs(updateMsg.Body.(*bgp.BGPUpdate))
return updateMsg
}
//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)
path := &api.Path{
Pattrs: make([][]byte, 0),
}
//form appropraite path attributes for path to be withdrawn
nlri := bgp.NewIPAddrPrefix(32, pathInfo.localEpIP)
path.Nlri, _ = nlri.Serialize()
origin, _ := bgp.NewPathAttributeOrigin(bgp.BGP_ORIGIN_ATTR_TYPE_EGP).Serialize()
path.Pattrs = append(path.Pattrs, origin)
aspathParam := []bgp.AsPathParamInterface{bgp.NewAs4PathParam(2, []uint32{self.myBgpAs})}
aspath, _ := bgp.NewPathAttributeAsPath(aspathParam).Serialize()
path.Pattrs = append(path.Pattrs, aspath)
n, _ := bgp.NewPathAttributeNextHop(pathInfo.nextHopIP).Serialize()
path.Pattrs = append(path.Pattrs, n)
path.IsWithdraw = true
//paths := []*api.Path{path}
arg := &api.DeletePathRequest{
Resource: api.Resource_GLOBAL,
Path: path,
}
//send arguement stream
client := api.NewGobgpApiClient(self.cc)
if client == nil {
log.Errorf("Gobgpapi stream invalid")
return nil
}
_, err := client.DeletePath(context.Background(), arg)
if err != nil {
log.Errorf("Fail to enforce Modpathi: %v", err)
return err
}
return nil
}
func TestPathPrependAsnToNewAsPathAttr(t *testing.T) {
assert := assert.New(t)
origin := bgp.NewPathAttributeOrigin(0)
nexthop := bgp.NewPathAttributeNextHop("192.168.50.1")
pathAttributes := []bgp.PathAttributeInterface{
origin,
nexthop,
}
nlri := []*bgp.IPAddrPrefix{bgp.NewIPAddrPrefix(24, "10.10.10.0")}
bgpmsg := bgp.NewBGPUpdateMessage(nil, pathAttributes, nlri)
update := bgpmsg.Body.(*bgp.BGPUpdate)
UpdatePathAttrs4ByteAs(update)
peer := PathCreatePeer()
p := NewPath(peer[0], update.NLRI[0], false, update.PathAttributes, time.Now(), false)
asn := uint32(65000)
p.PrependAsn(asn, 1)
assert.Equal([]uint32{asn}, p.GetAsSeqList())
}
func TestBMP(t *testing.T) {
aspath1 := []bgp.AsPathParamInterface{
bgp.NewAs4PathParam(2, []uint32{1000000}),
bgp.NewAs4PathParam(1, []uint32{1000001, 1002}),
bgp.NewAs4PathParam(2, []uint32{1003, 100004}),
}
mp_nlri := []bgp.AddrPrefixInterface{bgp.NewIPv6AddrPrefix(100,
"fe80:1234:1234:5667:8967:af12:8912:1023")}
p := []bgp.PathAttributeInterface{
bgp.NewPathAttributeOrigin(3),
bgp.NewPathAttributeAsPath(aspath1),
bgp.NewPathAttributeMpUnreachNLRI(mp_nlri),
}
w := []*bgp.IPAddrPrefix{}
n := []*bgp.IPAddrPrefix{}
msg := bgp.NewBGPUpdateMessage(w, p, n)
pList := ProcessMessage(msg, peerR1(), time.Now())
CreateUpdateMsgFromPaths(pList)
}
func updateMsgD3() *bgp.BGPMessage {
origin := bgp.NewPathAttributeOrigin(0)
aspathParam := []bgp.AsPathParamInterface{bgp.NewAsPathParam(2, []uint16{65100})}
aspath := bgp.NewPathAttributeAsPath(aspathParam)
nexthop := bgp.NewPathAttributeNextHop("192.168.150.1")
med := bgp.NewPathAttributeMultiExitDisc(100)
pathAttributes := []bgp.PathAttributeInterface{
origin,
aspath,
nexthop,
med,
}
nlri := []*bgp.IPAddrPrefix{bgp.NewIPAddrPrefix(24, "30.30.30.0")}
w1 := bgp.NewIPAddrPrefix(23, "40.40.40.0")
withdrawnRoutes := []*bgp.IPAddrPrefix{w1}
updateMsg := bgp.NewBGPUpdateMessage(withdrawnRoutes, pathAttributes, nlri)
UpdatePathAttrs4ByteAs(updateMsg.Body.(*bgp.BGPUpdate))
return updateMsg
}
func TestCalculate(t *testing.T) {
origin := bgp.NewPathAttributeOrigin(0)
aspathParam := []bgp.AsPathParamInterface{bgp.NewAs4PathParam(2, []uint32{65001})}
aspath := bgp.NewPathAttributeAsPath(aspathParam)
nexthop := bgp.NewPathAttributeNextHop("10.0.0.1")
med := bgp.NewPathAttributeMultiExitDisc(0)
pathAttributes := []bgp.PathAttributeInterface{origin, aspath, nexthop, med}
nlri := bgp.NewIPAddrPrefix(24, "10.10.0.101")
updateMsg := bgp.NewBGPUpdateMessage(nil, pathAttributes, []*bgp.IPAddrPrefix{nlri})
peer1 := &PeerInfo{AS: 1, Address: net.IP{1, 1, 1, 1}}
path1 := ProcessMessage(updateMsg, peer1, time.Now())[0]
path1.Filter("1", POLICY_DIRECTION_IMPORT)
action := &AsPathPrependAction{
asn: 100,
repeat: 10,
}
path2 := action.Apply(path1.Clone(false), nil)
path1.Filter("2", POLICY_DIRECTION_IMPORT)
path2.Filter("1", POLICY_DIRECTION_IMPORT)
d := NewDestination(nlri)
d.AddNewPath(path1)
d.AddNewPath(path2)
d.Calculate([]string{"1", "2"})
assert.Equal(t, len(d.GetKnownPathList("1")), 0)
assert.Equal(t, len(d.GetKnownPathList("2")), 1)
assert.Equal(t, len(d.knownPathList), 2)
d.AddWithdraw(path1.Clone(true))
d.Calculate([]string{"1", "2"})
assert.Equal(t, len(d.GetKnownPathList("1")), 0)
assert.Equal(t, len(d.GetKnownPathList("2")), 0)
assert.Equal(t, len(d.knownPathList), 0)
}
func TestPathPrependAsnToFullPathAttr(t *testing.T) {
assert := assert.New(t)
origin := bgp.NewPathAttributeOrigin(0)
asns := make([]uint16, 255)
for i, _ := range asns {
asns[i] = 65000 + uint16(i)
}
aspathParam := []bgp.AsPathParamInterface{
bgp.NewAsPathParam(bgp.BGP_ASPATH_ATTR_TYPE_SEQ, asns),
bgp.NewAsPathParam(bgp.BGP_ASPATH_ATTR_TYPE_SET, []uint16{65001, 65002, 65003, 65004, 65005}),
bgp.NewAsPathParam(bgp.BGP_ASPATH_ATTR_TYPE_CONFED_SEQ, []uint16{65100, 65101, 65102}),
bgp.NewAsPathParam(bgp.BGP_ASPATH_ATTR_TYPE_CONFED_SET, []uint16{65100, 65101})}
aspath := bgp.NewPathAttributeAsPath(aspathParam)
nexthop := bgp.NewPathAttributeNextHop("192.168.50.1")
pathAttributes := []bgp.PathAttributeInterface{
origin,
aspath,
nexthop,
}
nlri := []*bgp.IPAddrPrefix{bgp.NewIPAddrPrefix(24, "10.10.10.0")}
bgpmsg := bgp.NewBGPUpdateMessage(nil, pathAttributes, nlri)
update := bgpmsg.Body.(*bgp.BGPUpdate)
UpdatePathAttrs4ByteAs(update)
peer := PathCreatePeer()
p := NewPath(peer[0], update.NLRI[0], false, update.PathAttributes, time.Now(), false)
expected := []uint32{65000, 65000}
for _, v := range asns {
expected = append(expected, uint32(v))
}
p.PrependAsn(65000, 2)
assert.Equal(append(expected, []uint32{0, 0, 0}...), p.GetAsSeqList())
fmt.Printf("asns: %v", p.GetAsSeqList())
}
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)
}
/*
Bgp serve routine does the following:
1) Creates inb01 router port
2) Add MyBgp endpoint
3) Kicks off routines to monitor route updates and peer state
*/
func (self *OfnetBgp) StartProtoServer(routerInfo *OfnetProtoRouterInfo) error {
log.Infof("Starting the Bgp Server with %v", routerInfo)
//go routine to start gobgp server
var len uint
var err error
self.routerIP, len, err = ParseCIDR(routerInfo.RouterIP)
as, _ := strconv.Atoi(routerInfo.As)
self.myBgpAs = uint32(as)
log.Infof("Starting the Bgp Server for AS %v", self.myBgpAs)
self.modRibCh = make(chan *api.Path, 16)
self.advPathCh = make(chan *api.Path, 16)
timeout := grpc.WithTimeout(time.Second)
conn, err := grpc.Dial("127.0.0.1:50051", timeout, grpc.WithBlock(), grpc.WithInsecure())
if err != nil {
log.Infof("GRPC timeout")
log.Fatal(err)
}
self.cc = conn
defer self.cc.Close()
client := api.NewGobgpApiClient(self.cc)
if client == nil {
log.Errorf("Invalid Gobgpapi client")
return errors.New("Error creating Gobgpapiclient")
}
path := &api.Path{
Pattrs: make([][]byte, 0),
}
path.Nlri, _ = bgp.NewIPAddrPrefix(uint8(32), self.routerIP).Serialize()
n, _ := bgp.NewPathAttributeNextHop("0.0.0.0").Serialize()
path.Pattrs = append(path.Pattrs, n)
origin, _ := bgp.NewPathAttributeOrigin(bgp.BGP_ORIGIN_ATTR_TYPE_INCOMPLETE).Serialize()
path.Pattrs = append(path.Pattrs, origin)
log.Infof("Creating the loopback port ")
err = self.agent.ovsDriver.CreatePort(self.intfName, "internal", 1)
if err != nil {
log.Errorf("Error creating the port: %v", err)
}
defer self.agent.ovsDriver.DeletePort(self.intfName)
intfIP := fmt.Sprintf("%s/%d", self.routerIP, len)
log.Infof("Creating inb01 with ", intfIP)
ofPortno, _ := self.agent.ovsDriver.GetOfpPortNo(self.intfName)
link, err := netlink.LinkByName(self.intfName)
if err != nil {
log.Errorf("error finding link by name %v", self.intfName)
return err
}
linkIP, err := netlink.ParseAddr(intfIP)
if err != nil {
log.Errorf("invalid ip: %s", intfIP)
return err
}
netlink.AddrAdd(link, linkIP)
netlink.LinkSetUp(link)
if link == nil || ofPortno == 0 {
log.Errorf("Error fetching %v/%v/%v information", self.intfName, link, ofPortno)
return errors.New("Unable to fetch inb01 info")
}
intf, _ := net.InterfaceByName(self.intfName)
log.Infof("routerIP ", self.routerIP)
epid := self.agent.getEndpointIdByIpVrf(net.ParseIP(self.routerIP), "default")
log.Infof("Create VRF ")
_, ok := self.agent.createVrf("default")
if !ok {
log.Errorf("Error Creating default vrf for Bgp")
return errors.New("Error creating default vrf")
}
epreg := &OfnetEndpoint{
EndpointID: epid,
EndpointType: "internal-bgp",
IpAddr: net.ParseIP(self.routerIP),
IpMask: net.ParseIP("255.255.255.255"),
Vrf: "default", // FIXME set VRF correctly
MacAddrStr: intf.HardwareAddr.String(), //link.Attrs().HardwareAddr.String(),
Vlan: 1,
PortNo: ofPortno,
Timestamp: time.Now(),
}
// Add the endpoint to local routing table
self.agent.endpointDb[epid] = epreg
//log.Infof("self.agent.endpointDb[epid] %v " , self.agent.endpointDb[epid] )
self.agent.localEndpointDb[epreg.PortNo] = epreg
fmt.Println(epreg)
err = self.agent.datapath.AddLocalEndpoint(*epreg)
//Add bgp router id as well
bgpGlobalCfg := &bgpconf.Global{}
setDefaultGlobalConfigValues(bgpGlobalCfg)
bgpGlobalCfg.Config.RouterId = self.routerIP
bgpGlobalCfg.Config.As = self.myBgpAs
//self.bgpServer.SetGlobalType(*bgpGlobalCfg)
_, err2 := client.StartServer(context.Background(), &api.StartServerRequest{
Global: &api.Global{
As: uint32(self.myBgpAs),
RouterId: self.routerIP,
ListenPort: int32(epreg.PortNo),
ListenAddresses: []string{self.routerIP},
MplsLabelMin: uint32(16000),
MplsLabelMax: uint32(1048575),
},
})
log.Info("BGP -StartServer ERR %v", err2)
self.advPathCh <- path
log.Infof("start monitoring ")
//monitor route updates from peer
go self.monitorBest()
//monitor peer state
go self.monitorPeer()
self.start <- true
for {
select {
case p := <-self.modRibCh:
err = self.modRib(p)
if err != nil {
log.Error("failed to mod rib: ", err)
}
case <-self.stop:
return nil
}
}
}
// 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)
}
}
func TestMultipath(t *testing.T) {
UseMultiplePaths.Enabled = true
origin := bgp.NewPathAttributeOrigin(0)
aspathParam := []bgp.AsPathParamInterface{bgp.NewAs4PathParam(2, []uint32{65000})}
aspath := bgp.NewPathAttributeAsPath(aspathParam)
nexthop := bgp.NewPathAttributeNextHop("192.168.150.1")
med := bgp.NewPathAttributeMultiExitDisc(100)
pathAttributes := []bgp.PathAttributeInterface{
origin,
aspath,
nexthop,
med,
}
nlri := []*bgp.IPAddrPrefix{bgp.NewIPAddrPrefix(24, "10.10.10.0")}
updateMsg := bgp.NewBGPUpdateMessage(nil, pathAttributes, nlri)
peer1 := &PeerInfo{AS: 1, Address: net.IP{1, 1, 1, 1}, ID: net.IP{1, 1, 1, 1}}
path1 := ProcessMessage(updateMsg, peer1, time.Now())[0]
peer2 := &PeerInfo{AS: 2, Address: net.IP{2, 2, 2, 2}, ID: net.IP{2, 2, 2, 2}}
med = bgp.NewPathAttributeMultiExitDisc(100)
nexthop = bgp.NewPathAttributeNextHop("192.168.150.2")
pathAttributes = []bgp.PathAttributeInterface{
origin,
aspath,
nexthop,
med,
}
updateMsg = bgp.NewBGPUpdateMessage(nil, pathAttributes, nlri)
path2 := ProcessMessage(updateMsg, peer2, time.Now())[0]
d := NewDestination(nlri[0])
d.AddNewPath(path1)
d.AddNewPath(path2)
best, w, multi := d.Calculate([]string{GLOBAL_RIB_NAME})
assert.Equal(t, len(best), 1)
assert.Equal(t, len(w), 0)
assert.Equal(t, len(multi), 2)
assert.Equal(t, len(d.GetKnownPathList(GLOBAL_RIB_NAME)), 2)
path3 := path2.Clone(true)
d.AddWithdraw(path3)
best, w, multi = d.Calculate([]string{GLOBAL_RIB_NAME})
assert.Equal(t, len(best), 1)
assert.Equal(t, len(w), 1)
assert.Equal(t, len(multi), 1)
assert.Equal(t, len(d.GetKnownPathList(GLOBAL_RIB_NAME)), 1)
peer3 := &PeerInfo{AS: 3, Address: net.IP{3, 3, 3, 3}, ID: net.IP{3, 3, 3, 3}}
med = bgp.NewPathAttributeMultiExitDisc(50)
nexthop = bgp.NewPathAttributeNextHop("192.168.150.3")
pathAttributes = []bgp.PathAttributeInterface{
origin,
aspath,
nexthop,
med,
}
updateMsg = bgp.NewBGPUpdateMessage(nil, pathAttributes, nlri)
path4 := ProcessMessage(updateMsg, peer3, time.Now())[0]
d.AddNewPath(path4)
best, w, multi = d.Calculate([]string{GLOBAL_RIB_NAME})
assert.Equal(t, len(best), 1)
assert.Equal(t, len(w), 0)
assert.Equal(t, len(multi), 1)
assert.Equal(t, len(d.GetKnownPathList(GLOBAL_RIB_NAME)), 2)
nexthop = bgp.NewPathAttributeNextHop("192.168.150.2")
pathAttributes = []bgp.PathAttributeInterface{
origin,
aspath,
nexthop,
med,
}
updateMsg = bgp.NewBGPUpdateMessage(nil, pathAttributes, nlri)
path5 := ProcessMessage(updateMsg, peer2, time.Now())[0]
d.AddNewPath(path5)
best, w, multi = d.Calculate([]string{GLOBAL_RIB_NAME})
assert.Equal(t, len(best), 1)
assert.Equal(t, len(w), 0)
assert.Equal(t, len(multi), 2)
assert.Equal(t, len(d.GetKnownPathList(GLOBAL_RIB_NAME)), 3)
UseMultiplePaths.Enabled = false
}
func createRequestFromIPRouteMessage(m *zebra.Message) *api.AddPathRequest {
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)
binPattrs := make([][]byte, 0, len(pattr))
for _, a := range pattr {
bin, _ := a.Serialize()
binPattrs = append(binPattrs, bin)
}
binNlri, _ := nlri.Serialize()
path := &api.Path{
Nlri: binNlri,
Pattrs: binPattrs,
IsWithdraw: isWithdraw,
Family: uint32(family),
IsFromExternal: true,
}
return &api.AddPathRequest{
Resource: api.Resource_GLOBAL,
Path: path,
}
}
func parseRouteToGobgp(route ovsdb.RowUpdate, nexthops map[string]ovsdb.Row) (*api.Path, bool, bool, error) {
var nlri bgp.AddrPrefixInterface
path := &api.Path{
IsFromExternal: true,
Pattrs: make([][]byte, 0),
}
isWithdraw := false
isFromGobgp := false
prefix := route.New.Fields["prefix"].(string)
safi := route.New.Fields["sub_address_family"].(string)
afi := route.New.Fields["address_family"].(string)
m := route.New.Fields["metric"].(float64)
attrs := route.New.Fields["path_attributes"].(ovsdb.OvsMap).GoMap
if attrs["IsFromGobgp"] == "true" {
isFromGobgp = true
}
nh := make([]interface{}, 0)
nhId, ok := route.New.Fields["bgp_nexthops"].(ovsdb.UUID)
if ok {
for id, n := range nexthops {
if id == nhId.GoUUID {
nh = append(nh, n.Fields["ip_address"])
}
}
}
nexthop := "0.0.0.0"
if afi == "ipv6" {
nexthop = "::"
}
if len(nh) == 0 {
log.Debug("nexthop addres does not exist")
} else if len(nh) == 1 {
if net.ParseIP(nh[0].(string)) == nil {
return nil, isWithdraw, isFromGobgp, fmt.Errorf("invalid nexthop address")
} else {
nexthop = nh[0].(string)
}
} else {
return nil, isWithdraw, isFromGobgp, fmt.Errorf("route has multiple nexthop address")
}
med, _ := bgp.NewPathAttributeMultiExitDisc(uint32(m)).Serialize()
path.Pattrs = append(path.Pattrs, med)
lpref, err := strconv.Atoi(attrs["BGP_loc_pref"].(string))
if err != nil {
return nil, isWithdraw, isFromGobgp, err
}
localPref, _ := bgp.NewPathAttributeLocalPref(uint32(lpref)).Serialize()
path.Pattrs = append(path.Pattrs, localPref)
var origin_t int
switch attrs["BGP_origin"].(string) {
case "i":
origin_t = bgp.BGP_ORIGIN_ATTR_TYPE_IGP
case "e":
origin_t = bgp.BGP_ORIGIN_ATTR_TYPE_EGP
case "?":
origin_t = bgp.BGP_ORIGIN_ATTR_TYPE_INCOMPLETE
default:
return nil, isWithdraw, isFromGobgp, fmt.Errorf("invalid origin")
}
origin, _ := bgp.NewPathAttributeOrigin(uint8(origin_t)).Serialize()
path.Pattrs = append(path.Pattrs, origin)
switch afi {
case "ipv4", "ipv6":
ip, net, err := net.ParseCIDR(prefix)
if err != nil {
return nil, isWithdraw, isFromGobgp, err
}
ones, _ := net.Mask.Size()
if afi == "ipv4" {
if ip.To4() == nil {
return nil, isWithdraw, isFromGobgp, fmt.Errorf("invalid ipv4 prefix")
}
nlri = bgp.NewIPAddrPrefix(uint8(ones), ip.String())
} else {
if ip.To16() == nil {
return nil, isWithdraw, isFromGobgp, fmt.Errorf("invalid ipv6 prefix")
}
nlri = bgp.NewIPv6AddrPrefix(uint8(ones), ip.String())
}
default:
return nil, isWithdraw, isFromGobgp, fmt.Errorf("unsupported address family: %s", afi)
}
if afi == "ipv4" && safi == "unicast" {
path.Nlri, _ = nlri.Serialize()
n, _ := bgp.NewPathAttributeNextHop(nexthop).Serialize()
path.Pattrs = append(path.Pattrs, n)
} else {
mpreach, _ := bgp.NewPathAttributeMpReachNLRI(nexthop, []bgp.AddrPrefixInterface{nlri}).Serialize()
path.Pattrs = append(path.Pattrs, mpreach)
}
if attrs["BGP_flags"].(string) == "512" {
isWithdraw = true
}
return path, isWithdraw, isFromGobgp, nil
}
//AddLocalProtoRoute is used to add local endpoint to the protocol RIB
func (self *OfnetBgp) AddLocalProtoRoute(pathInfo *OfnetProtoRouteInfo) error {
log.Infof("Received AddLocalProtoRoute to add local endpoint to protocol RIB: %v", pathInfo)
if self.routerIP == "" {
//ignoring populating to the bgp rib because
//Bgp is not configured.
return nil
}
path := &api.Path{
Pattrs: make([][]byte, 0),
SourceAsn: self.myBgpAs,
}
aspathParam := []bgp.AsPathParamInterface{bgp.NewAs4PathParam(2, []uint32{self.myBgpAs})}
aspath, _ := bgp.NewPathAttributeAsPath(aspathParam).Serialize()
path.Pattrs = append(path.Pattrs, aspath)
// form the path structure with appropriate path attributes
nlri := bgp.NewIPAddrPrefix(32, pathInfo.localEpIP)
path.Nlri, _ = nlri.Serialize()
origin, _ := bgp.NewPathAttributeOrigin(bgp.BGP_ORIGIN_ATTR_TYPE_EGP).Serialize()
path.Pattrs = append(path.Pattrs, origin)
log.Infof("Received AddLocalProtoRoute aspath: %v", aspath)
mpls, err := bgp.ParseMPLSLabelStack("3")
if err != nil {
return nil
}
var nlri2 bgp.AddrPrefixInterface
nlri2 = bgp.NewLabeledIPAddrPrefix(32, pathInfo.localEpIP, *mpls)
mpreach, _ := bgp.NewPathAttributeMpReachNLRI(pathInfo.nextHopIP, []bgp.AddrPrefixInterface{nlri2}).Serialize()
log.Infof("Received AddLocalProtoRoute nlri2: %v, mpreach: %v", nlri2, mpreach)
path.Pattrs = append(path.Pattrs, mpreach)
//path.Pattrs = append(path.Pattrs, n)
arg := &api.AddPathRequest{
Resource: api.Resource_GLOBAL,
VrfId: "default",
Path: path,
}
log.Infof("BGP - arg %v ", arg)
// add routes
/*
prefix := pathInfo.localEpIP
log.Infof("BGP - Prefix %v " , prefix )
path2, err := cmd.ParsePath(bgp.RF_IPv4_MPLS, []string{"10.200.1.25/32", "3"})
log.Infof("BGP - Path2 %v " , path2 )
log.Infof("BGP - Err %v " , err )
req := bgpserver.NewGrpcRequest(bgpserver.REQ_ADD_PATH, "", bgp.RouteFamily(0), &api.AddPathRequest{
Resource: api.Resource_GLOBAL,
Path: path2,
})
self.bgpServer.GrpcReqCh <- req
res := <-req.ResponseCh
if err := res.Err(); err != nil {
log.Fatal(err)
log.Infof("BGP - Err %v " , err)
}
*/
//send arguement stream
client := api.NewGobgpApiClient(self.cc)
if client == nil {
log.Infof("Gobgpapi stream invalid")
return nil
}
stream, err := client.AddPath(context.Background(), arg)
if err != nil {
log.Infof("Fail to enforce Modpath: %v %v", err, stream)
return err
}
return nil
}