本文整理汇总了Golang中github.com/osrg/gobgp/packet/bgp.NewPathAttributeAsPath函数的典型用法代码示例。如果您正苦于以下问题:Golang NewPathAttributeAsPath函数的具体用法?Golang NewPathAttributeAsPath怎么用?Golang NewPathAttributeAsPath使用的例子?那么恭喜您, 这里精选的函数代码示例或许可以为您提供帮助。
在下文中一共展示了NewPathAttributeAsPath函数的15个代码示例,这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞,您的评价将有助于系统推荐出更棒的Golang代码示例。
示例1: TestImplicitWithdrawCalculate
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)
}
示例2: TestMedTieBreaker
func TestMedTieBreaker(t *testing.T) {
nlri := bgp.NewIPAddrPrefix(24, "10.10.0.0")
p0 := func() *Path {
aspath := bgp.NewPathAttributeAsPath([]bgp.AsPathParamInterface{bgp.NewAs4PathParam(bgp.BGP_ASPATH_ATTR_TYPE_SEQ, []uint32{65001, 65002}), bgp.NewAs4PathParam(bgp.BGP_ASPATH_ATTR_TYPE_SEQ, []uint32{65003, 65004})})
attrs := []bgp.PathAttributeInterface{aspath, bgp.NewPathAttributeMultiExitDisc(0)}
return NewPath(nil, nlri, false, attrs, time.Now(), false)
}()
p1 := func() *Path {
aspath := bgp.NewPathAttributeAsPath([]bgp.AsPathParamInterface{bgp.NewAs4PathParam(bgp.BGP_ASPATH_ATTR_TYPE_SEQ, []uint32{65001, 65002}), bgp.NewAs4PathParam(bgp.BGP_ASPATH_ATTR_TYPE_SEQ, []uint32{65003, 65005})})
attrs := []bgp.PathAttributeInterface{aspath, bgp.NewPathAttributeMultiExitDisc(10)}
return NewPath(nil, nlri, false, attrs, time.Now(), false)
}()
// same AS
assert.Equal(t, compareByMED(p0, p1), p0)
p2 := func() *Path {
aspath := bgp.NewPathAttributeAsPath([]bgp.AsPathParamInterface{bgp.NewAs4PathParam(bgp.BGP_ASPATH_ATTR_TYPE_SEQ, []uint32{65003})})
attrs := []bgp.PathAttributeInterface{aspath, bgp.NewPathAttributeMultiExitDisc(10)}
return NewPath(nil, nlri, false, attrs, time.Now(), false)
}()
// different AS
assert.Equal(t, compareByMED(p0, p2), (*Path)(nil))
p3 := func() *Path {
aspath := bgp.NewPathAttributeAsPath([]bgp.AsPathParamInterface{bgp.NewAs4PathParam(bgp.BGP_ASPATH_ATTR_TYPE_CONFED_SEQ, []uint32{65003, 65004}), bgp.NewAs4PathParam(bgp.BGP_ASPATH_ATTR_TYPE_SEQ, []uint32{65001, 65003})})
attrs := []bgp.PathAttributeInterface{aspath, bgp.NewPathAttributeMultiExitDisc(0)}
return NewPath(nil, nlri, false, attrs, time.Now(), false)
}()
p4 := func() *Path {
aspath := bgp.NewPathAttributeAsPath([]bgp.AsPathParamInterface{bgp.NewAs4PathParam(bgp.BGP_ASPATH_ATTR_TYPE_SEQ, []uint32{65001, 65002}), bgp.NewAs4PathParam(bgp.BGP_ASPATH_ATTR_TYPE_CONFED_SEQ, []uint32{65005, 65006})})
attrs := []bgp.PathAttributeInterface{aspath, bgp.NewPathAttributeMultiExitDisc(10)}
return NewPath(nil, nlri, false, attrs, time.Now(), false)
}()
// ignore confed
assert.Equal(t, compareByMED(p3, p4), p3)
p5 := func() *Path {
attrs := []bgp.PathAttributeInterface{bgp.NewPathAttributeMultiExitDisc(0)}
return NewPath(nil, nlri, false, attrs, time.Now(), false)
}()
p6 := func() *Path {
attrs := []bgp.PathAttributeInterface{bgp.NewPathAttributeMultiExitDisc(10)}
return NewPath(nil, nlri, false, attrs, time.Now(), false)
}()
// no aspath
assert.Equal(t, compareByMED(p5, p6), p5)
}
示例3: TestMrtRib
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)
}
示例4: TestMrtRibEntry
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)
}
示例5: strToASParam
func strToASParam(str string) *bgp.PathAttributeAsPath {
toList := func(asstr, sep string) []uint32 {
as := make([]uint32, 0)
l := strings.Split(asstr, sep)
for _, s := range l {
v, _ := strconv.ParseUint(s, 10, 32)
as = append(as, uint32(v))
}
return as
}
var atype uint8
var as []uint32
if strings.HasPrefix(str, "{") {
atype = bgp.BGP_ASPATH_ATTR_TYPE_SET
as = toList(str[1:len(str)-1], ",")
} else if strings.HasPrefix(str, "(") {
atype = bgp.BGP_ASPATH_ATTR_TYPE_CONFED_SET
as = toList(str[1:len(str)-1], " ")
} else {
atype = bgp.BGP_ASPATH_ATTR_TYPE_SEQ
as = toList(str, " ")
}
return bgp.NewPathAttributeAsPath([]bgp.AsPathParamInterface{bgp.NewAs4PathParam(atype, as)})
}
示例6: TestASPathLen
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())
}
示例7: TestPathPrependAsnToExistingSeqAttr
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())
}
示例8: TestTimeTieBreaker
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
}
示例9: AddLocalProtoRoute
//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
}
示例10: TestAsPathAs4Trans5
// before:
// as-path : 65000, 4000, 23456, 23456, 40001
// as4-path : {10, 20, 30} 400000, 300000, 40001
// expected result:
// as-path : 65000, {10, 20, 30}, 400000, 300000, 40001
func TestAsPathAs4Trans5(t *testing.T) {
as := []uint16{65000, 4000, bgp.AS_TRANS, bgp.AS_TRANS, 40001}
params := []bgp.AsPathParamInterface{bgp.NewAsPathParam(bgp.BGP_ASPATH_ATTR_TYPE_SEQ, as)}
aspath := bgp.NewPathAttributeAsPath(params)
as4 := []uint32{400000, 300000, 40001}
as4param1 := bgp.NewAs4PathParam(bgp.BGP_ASPATH_ATTR_TYPE_SEQ, as4)
as5 := []uint32{10, 20, 30}
as4param2 := bgp.NewAs4PathParam(bgp.BGP_ASPATH_ATTR_TYPE_SET, as5)
param4s := []*bgp.As4PathParam{as4param2, as4param1}
as4path := bgp.NewPathAttributeAs4Path(param4s)
msg := bgp.NewBGPUpdateMessage(nil, []bgp.PathAttributeInterface{aspath, as4path}, nil).Body.(*bgp.BGPUpdate)
UpdatePathAttrs4ByteAs(msg)
assert.Equal(t, len(msg.PathAttributes), 1)
assert.Equal(t, len(msg.PathAttributes[0].(*bgp.PathAttributeAsPath).Value), 3)
assert.Equal(t, len(msg.PathAttributes[0].(*bgp.PathAttributeAsPath).Value[0].(*bgp.As4PathParam).AS), 1)
assert.Equal(t, msg.PathAttributes[0].(*bgp.PathAttributeAsPath).Value[0].(*bgp.As4PathParam).AS[0], uint32(65000))
assert.Equal(t, len(msg.PathAttributes[0].(*bgp.PathAttributeAsPath).Value[1].(*bgp.As4PathParam).AS), 3)
assert.Equal(t, msg.PathAttributes[0].(*bgp.PathAttributeAsPath).Value[1].(*bgp.As4PathParam).AS[0], uint32(10))
assert.Equal(t, msg.PathAttributes[0].(*bgp.PathAttributeAsPath).Value[1].(*bgp.As4PathParam).AS[1], uint32(20))
assert.Equal(t, msg.PathAttributes[0].(*bgp.PathAttributeAsPath).Value[1].(*bgp.As4PathParam).AS[2], uint32(30))
assert.Equal(t, len(msg.PathAttributes[0].(*bgp.PathAttributeAsPath).Value[2].(*bgp.As4PathParam).AS), 3)
assert.Equal(t, msg.PathAttributes[0].(*bgp.PathAttributeAsPath).Value[2].(*bgp.As4PathParam).AS[0], uint32(400000))
assert.Equal(t, msg.PathAttributes[0].(*bgp.PathAttributeAsPath).Value[2].(*bgp.As4PathParam).AS[1], uint32(300000))
assert.Equal(t, msg.PathAttributes[0].(*bgp.PathAttributeAsPath).Value[2].(*bgp.As4PathParam).AS[2], uint32(40001))
}
示例11: PrependAsn
// PrependAsn prepends AS number.
// This function updates the AS_PATH attribute as follows.
// 1) if the first path segment of the AS_PATH is of type
// AS_SEQUENCE, the local system prepends the specified AS num as
// the last element of the sequence (put it in the left-most
// position with respect to the position of octets in the
// protocol message) the specified number of times.
// If the act of prepending will cause an overflow in the AS_PATH
// segment (i.e., more than 255 ASes),
// it SHOULD prepend a new segment of type AS_SEQUENCE
// and prepend its own AS number to this new segment.
//
// 2) if the first path segment of the AS_PATH is of other than type
// AS_SEQUENCE, the local system prepends a new path segment of type
// AS_SEQUENCE to the AS_PATH, including the specified AS number in
// that segment.
//
// 3) if the AS_PATH is empty, the local system creates a path
// segment of type AS_SEQUENCE, places the specified AS number
// into that segment, and places that segment into the AS_PATH.
func (path *Path) PrependAsn(asn uint32, repeat uint8) {
original := path.GetAsPath()
asns := make([]uint32, repeat)
for i, _ := range asns {
asns[i] = asn
}
var asPath *bgp.PathAttributeAsPath
if original == nil {
asPath = bgp.NewPathAttributeAsPath([]bgp.AsPathParamInterface{})
} else {
asPath = cloneAsPath(original)
}
if len(asPath.Value) > 0 {
fst := asPath.Value[0].(*bgp.As4PathParam)
if fst.Type == bgp.BGP_ASPATH_ATTR_TYPE_SEQ {
if len(fst.AS)+int(repeat) > 255 {
repeat = uint8(255 - len(fst.AS))
}
fst.AS = append(asns[:int(repeat)], fst.AS...)
fst.Num += repeat
asns = asns[int(repeat):]
}
}
if len(asns) > 0 {
p := bgp.NewAs4PathParam(bgp.BGP_ASPATH_ATTR_TYPE_SEQ, asns)
asPath.Value = append([]bgp.AsPathParamInterface{p}, asPath.Value...)
}
path.setPathAttr(asPath)
}
示例12: cloneAsPath
func cloneAsPath(asAttr *bgp.PathAttributeAsPath) *bgp.PathAttributeAsPath {
newASparams := make([]bgp.AsPathParamInterface, len(asAttr.Value))
for i, param := range asAttr.Value {
asParam := param.(*bgp.As4PathParam)
as := make([]uint32, len(asParam.AS))
copy(as, asParam.AS)
newASparams[i] = bgp.NewAs4PathParam(asParam.Type, as)
}
return bgp.NewPathAttributeAsPath(newASparams)
}
示例13: TestCalculate2
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)
}
示例14: UpdatePathAttrs2ByteAs
func UpdatePathAttrs2ByteAs(msg *bgp.BGPUpdate) error {
ps := msg.PathAttributes
msg.PathAttributes = make([]bgp.PathAttributeInterface, len(ps))
copy(msg.PathAttributes, ps)
var asAttr *bgp.PathAttributeAsPath
idx := 0
for i, attr := range msg.PathAttributes {
if a, ok := attr.(*bgp.PathAttributeAsPath); ok {
asAttr = a
idx = i
break
}
}
if asAttr == nil {
return nil
}
as4Params := make([]*bgp.As4PathParam, 0, len(asAttr.Value))
as2Params := make([]bgp.AsPathParamInterface, 0, len(asAttr.Value))
mkAs4 := false
for _, param := range asAttr.Value {
as4Param := param.(*bgp.As4PathParam)
as2Path := make([]uint16, 0, len(as4Param.AS))
for _, as := range as4Param.AS {
if as > (1<<16)-1 {
mkAs4 = true
as2Path = append(as2Path, bgp.AS_TRANS)
} else {
as2Path = append(as2Path, uint16(as))
}
}
as2Params = append(as2Params, bgp.NewAsPathParam(as4Param.Type, as2Path))
// RFC 6793 4.2.2 Generating Updates
//
// Whenever the AS path information contains the AS_CONFED_SEQUENCE or
// AS_CONFED_SET path segment, the NEW BGP speaker MUST exclude such
// path segments from the AS4_PATH attribute being constructed.
if as4Param.Type != bgp.BGP_ASPATH_ATTR_TYPE_CONFED_SEQ && as4Param.Type != bgp.BGP_ASPATH_ATTR_TYPE_CONFED_SET {
as4Params = append(as4Params, as4Param)
}
}
msg.PathAttributes[idx] = bgp.NewPathAttributeAsPath(as2Params)
if mkAs4 {
msg.PathAttributes = append(msg.PathAttributes, bgp.NewPathAttributeAs4Path(as4Params))
}
return nil
}
示例15: TestAsPathAs2Trans2
// before:
// as-path : 65000, 4000, 40000, 30000, 40001
// expected result:
// as-path : 65000, 4000, 40000, 30000, 40001
func TestAsPathAs2Trans2(t *testing.T) {
as := []uint32{65000, 4000, 40000, 30000, 40001}
params := []bgp.AsPathParamInterface{bgp.NewAs4PathParam(bgp.BGP_ASPATH_ATTR_TYPE_SEQ, as)}
aspath := bgp.NewPathAttributeAsPath(params)
msg := bgp.NewBGPUpdateMessage(nil, []bgp.PathAttributeInterface{aspath}, nil).Body.(*bgp.BGPUpdate)
UpdatePathAttrs2ByteAs(msg)
assert.Equal(t, len(msg.PathAttributes), 1)
assert.Equal(t, len(msg.PathAttributes[0].(*bgp.PathAttributeAsPath).Value), 1)
assert.Equal(t, len(msg.PathAttributes[0].(*bgp.PathAttributeAsPath).Value[0].(*bgp.AsPathParam).AS), 5)
assert.Equal(t, msg.PathAttributes[0].(*bgp.PathAttributeAsPath).Value[0].(*bgp.AsPathParam).AS[0], uint16(65000))
assert.Equal(t, msg.PathAttributes[0].(*bgp.PathAttributeAsPath).Value[0].(*bgp.AsPathParam).AS[1], uint16(4000))
assert.Equal(t, msg.PathAttributes[0].(*bgp.PathAttributeAsPath).Value[0].(*bgp.AsPathParam).AS[2], uint16(40000))
assert.Equal(t, msg.PathAttributes[0].(*bgp.PathAttributeAsPath).Value[0].(*bgp.AsPathParam).AS[3], uint16(30000))
assert.Equal(t, msg.PathAttributes[0].(*bgp.PathAttributeAsPath).Value[0].(*bgp.AsPathParam).AS[4], uint16(40001))
}