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// Copyright (C) 2014 Nippon Telegraph and Telephone Corporation.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
// implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package table
import (
//"fmt"
"net"
"testing"
"time"
"github.com/osrg/gobgp/pkg/packet/bgp"
"github.com/stretchr/testify/assert"
)
func TestDestinationNewIPv4(t *testing.T) {
peerD := DestCreatePeer()
pathD := DestCreatePath(peerD)
ipv4d := NewDestination(pathD[0].GetNlri(), 0)
assert.NotNil(t, ipv4d)
}
func TestDestinationNewIPv6(t *testing.T) {
peerD := DestCreatePeer()
pathD := DestCreatePath(peerD)
ipv6d := NewDestination(pathD[0].GetNlri(), 0)
assert.NotNil(t, ipv6d)
}
func TestDestinationSetRouteFamily(t *testing.T) {
dd := &Destination{}
dd.setRouteFamily(bgp.RF_IPv4_UC)
rf := dd.Family()
assert.Equal(t, rf, bgp.RF_IPv4_UC)
}
func TestDestinationGetRouteFamily(t *testing.T) {
dd := &Destination{}
dd.setRouteFamily(bgp.RF_IPv6_UC)
rf := dd.Family()
assert.Equal(t, rf, bgp.RF_IPv6_UC)
}
func TestDestinationSetNlri(t *testing.T) {
dd := &Destination{}
nlri := bgp.NewIPAddrPrefix(24, "13.2.3.1")
dd.setNlri(nlri)
r_nlri := dd.GetNlri()
assert.Equal(t, r_nlri, nlri)
}
func TestDestinationGetNlri(t *testing.T) {
dd := &Destination{}
nlri := bgp.NewIPAddrPrefix(24, "10.110.123.1")
dd.setNlri(nlri)
r_nlri := dd.GetNlri()
assert.Equal(t, r_nlri, nlri)
}
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, 0)
d.Calculate(path1)
// 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.Calculate(path2)
// 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.Calculate(path3)
// 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.Calculate(path4)
// we must have paths from peer1, peer2 and peer3
assert.Equal(t, len(d.knownPathList), 3)
}
func TestNeighAddrTieBreak(t *testing.T) {
nlri := bgp.NewIPAddrPrefix(24, "10.10.0.0")
peer0 := &PeerInfo{AS: 65001, LocalAS: 1, Address: net.IP{2, 2, 2, 2}, ID: net.IP{2, 2, 2, 2}}
p0 := func() *Path {
aspath := bgp.NewPathAttributeAsPath([]bgp.AsPathParamInterface{bgp.NewAs4PathParam(bgp.BGP_ASPATH_ATTR_TYPE_SEQ, []uint32{65001})})
attrs := []bgp.PathAttributeInterface{aspath, bgp.NewPathAttributeMultiExitDisc(0)}
return NewPath(peer0, nlri, false, attrs, time.Now(), false)
}()
peer1 := &PeerInfo{AS: 65001, LocalAS: 1, Address: net.IP{3, 3, 3, 3}, ID: net.IP{2, 2, 2, 2}} // same ID as peer0, separate eBGP session
p1 := func() *Path {
aspath := bgp.NewPathAttributeAsPath([]bgp.AsPathParamInterface{bgp.NewAs4PathParam(bgp.BGP_ASPATH_ATTR_TYPE_SEQ, []uint32{65001})})
attrs := []bgp.PathAttributeInterface{aspath, bgp.NewPathAttributeMultiExitDisc(0)}
return NewPath(peer1, nlri, false, attrs, time.Now(), false)
}()
assert.Equal(t, compareByNeighborAddress(p0, p1), p0)
}
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)
}
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, 0)
d.Calculate(path1)
d.Calculate(path2)
assert.Equal(t, len(d.knownPathList), 2)
assert.Equal(t, true, d.GetBestPath("", 0).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, 0)
d.Calculate(path1)
d.Calculate(path2)
assert.Equal(t, len(d.knownPathList), 2)
assert.Equal(t, true, d.GetBestPath("", 0).GetSource().ID.Equal(net.IP{1, 1, 1, 1})) // path from peer1 win
}
func DestCreatePeer() []*PeerInfo {
peerD1 := &PeerInfo{AS: 65000}
peerD2 := &PeerInfo{AS: 65001}
peerD3 := &PeerInfo{AS: 65002}
peerD := []*PeerInfo{peerD1, peerD2, peerD3}
return peerD
}
func DestCreatePath(peerD []*PeerInfo) []*Path {
bgpMsgD1 := updateMsgD1()
bgpMsgD2 := updateMsgD2()
bgpMsgD3 := updateMsgD3()
pathD := make([]*Path, 3)
for i, msg := range []*bgp.BGPMessage{bgpMsgD1, bgpMsgD2, bgpMsgD3} {
updateMsgD := msg.Body.(*bgp.BGPUpdate)
nlriList := updateMsgD.NLRI
pathAttributes := updateMsgD.PathAttributes
nlri_info := nlriList[0]
pathD[i] = NewPath(peerD[i], nlri_info, false, pathAttributes, time.Now(), false)
}
return pathD
}
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
}
func updateMsgD2() *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")}
updateMsg := bgp.NewBGPUpdateMessage(nil, pathAttributes, nlri)
UpdatePathAttrs4ByteAs(updateMsg.Body.(*bgp.BGPUpdate))
return updateMsg
}
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 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], 0)
d.Calculate(path2)
best, old, multi := d.Calculate(path1).GetChanges(GLOBAL_RIB_NAME, 0, false)
assert.NotNil(t, best)
assert.Equal(t, old, path2)
assert.Equal(t, len(multi), 2)
assert.Equal(t, len(d.GetKnownPathList(GLOBAL_RIB_NAME, 0)), 2)
path3 := path2.Clone(true)
dd := d.Calculate(path3)
best, old, multi = dd.GetChanges(GLOBAL_RIB_NAME, 0, false)
assert.Nil(t, best)
assert.Equal(t, old, path1)
assert.Equal(t, len(multi), 1)
assert.Equal(t, len(d.GetKnownPathList(GLOBAL_RIB_NAME, 0)), 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]
dd = d.Calculate(path4)
best, _, multi = dd.GetChanges(GLOBAL_RIB_NAME, 0, false)
assert.NotNil(t, best)
assert.Equal(t, len(multi), 1)
assert.Equal(t, len(d.GetKnownPathList(GLOBAL_RIB_NAME, 0)), 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]
best, _, multi = d.Calculate(path5).GetChanges(GLOBAL_RIB_NAME, 0, false)
assert.NotNil(t, best)
assert.Equal(t, len(multi), 2)
assert.Equal(t, len(d.GetKnownPathList(GLOBAL_RIB_NAME, 0)), 3)
UseMultiplePaths.Enabled = false
}
func TestIdMap(t *testing.T) {
d := NewDestination(bgp.NewIPAddrPrefix(24, "10.10.0.101"), 64)
for i := 0; ; i++ {
if id, err := d.localIdMap.FindandSetZeroBit(); err == nil {
assert.Equal(t, uint(i+1), id)
} else {
assert.Equal(t, i, 63)
break
}
}
d.localIdMap.Expand()
for i := 0; i < 64; i++ {
id, _ := d.localIdMap.FindandSetZeroBit()
assert.Equal(t, id, uint(64+i))
}
_, err := d.localIdMap.FindandSetZeroBit()
assert.NotNil(t, err)
}
func TestGetWithdrawnPath(t *testing.T) {
attrs := []bgp.PathAttributeInterface{
bgp.NewPathAttributeOrigin(0),
}
p1 := NewPath(nil, bgp.NewIPAddrPrefix(24, "13.2.3.0"), false, attrs, time.Now(), false)
p2 := NewPath(nil, bgp.NewIPAddrPrefix(24, "13.2.4.0"), false, attrs, time.Now(), false)
p3 := NewPath(nil, bgp.NewIPAddrPrefix(24, "13.2.5.0"), false, attrs, time.Now(), false)
u := &Update{
KnownPathList: []*Path{p2},
OldKnownPathList: []*Path{p1, p2, p3},
}
l := u.GetWithdrawnPath()
assert.Equal(t, len(l), 2)
assert.Equal(t, l[0].GetNlri(), p1.GetNlri())
}
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