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demoexporter/bmp: switch to GoBGP v4

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This commit is contained in:
Vincent Bernat
2025-11-03 07:49:03 +01:00
parent 217c484061
commit b00f74f7e4
5 changed files with 62 additions and 33 deletions
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82
demoexporter/bmp/client.go
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@@ -9,11 +9,12 @@ import (
"errors"
"io"
"net"
"net/netip"
"syscall"
"time"
"github.com/osrg/gobgp/v3/pkg/packet/bgp"
"github.com/osrg/gobgp/v3/pkg/packet/bmp"
"github.com/osrg/gobgp/v4/pkg/packet/bgp"
"github.com/osrg/gobgp/v4/pkg/packet/bmp"
)
// startBMPClient starts the BMP client
@@ -31,9 +32,9 @@ func (c *Component) startBMPClient(ctx context.Context) {
buf := bytes.NewBuffer([]byte{})
peerHeader := bmp.NewBMPPeerHeader(
bmp.BMP_PEER_TYPE_GLOBAL, 0, 0,
c.config.PeerIP.Unmap().String(),
c.config.PeerIP,
uint32(c.config.PeerASN),
"2.2.2.2",
netip.MustParseAddr("2.2.2.2"),
0)
pkt, err := bmp.NewBMPInitiation([]bmp.BMPInfoTLVInterface{
bmp.NewBMPInfoTLVString(bmp.BMP_INIT_TLV_TYPE_SYS_DESCR, "Fake exporter"),
@@ -43,23 +44,31 @@ func (c *Component) startBMPClient(ctx context.Context) {
panic(err)
}
buf.Write(pkt)
pkt, err = bmp.NewBMPPeerUpNotification(*peerHeader, c.config.LocalIP.Unmap().String(), 179, 47647,
bgp.NewBGPOpenMessage(c.config.LocalASN, 30, "1.1.1.1",
[]bgp.OptionParameterInterface{
bgp.NewOptionParameterCapability([]bgp.ParameterCapabilityInterface{
bgp.NewCapMultiProtocol(bgp.RF_IPv4_UC),
bgp.NewCapMultiProtocol(bgp.RF_IPv6_UC),
}),
},
),
bgp.NewBGPOpenMessage(c.config.PeerASN, 30, "2.2.2.2",
[]bgp.OptionParameterInterface{
bgp.NewOptionParameterCapability([]bgp.ParameterCapabilityInterface{
bgp.NewCapMultiProtocol(bgp.RF_IPv4_UC),
bgp.NewCapMultiProtocol(bgp.RF_IPv6_UC),
}),
},
),
om1, err := bgp.NewBGPOpenMessage(c.config.LocalASN, 30, netip.MustParseAddr("1.1.1.1"),
[]bgp.OptionParameterInterface{
bgp.NewOptionParameterCapability([]bgp.ParameterCapabilityInterface{
bgp.NewCapMultiProtocol(bgp.RF_IPv4_UC),
bgp.NewCapMultiProtocol(bgp.RF_IPv6_UC),
}),
},
)
if err != nil {
panic(err)
}
om2, err := bgp.NewBGPOpenMessage(c.config.PeerASN, 30, netip.MustParseAddr("2.2.2.2"),
[]bgp.OptionParameterInterface{
bgp.NewOptionParameterCapability([]bgp.ParameterCapabilityInterface{
bgp.NewCapMultiProtocol(bgp.RF_IPv4_UC),
bgp.NewCapMultiProtocol(bgp.RF_IPv6_UC),
}),
},
)
if err != nil {
panic(err)
}
pkt, err = bmp.NewBMPPeerUpNotification(*peerHeader, c.config.LocalIP, 179, 47647,
om1,
om2,
).Serialize()
if err != nil {
panic(err)
@@ -67,28 +76,41 @@ func (c *Component) startBMPClient(ctx context.Context) {
buf.Write(pkt)
// Send the routes
for _, af := range []bgp.RouteFamily{bgp.RF_IPv4_UC, bgp.RF_IPv6_UC} {
for _, af := range []bgp.Family{bgp.RF_IPv4_UC, bgp.RF_IPv6_UC} {
var nh netip.Addr
if af == bgp.RF_IPv4_UC {
nh = netip.MustParseAddr("192.0.2.1")
} else {
nh = netip.MustParseAddr("fe80::1")
}
for _, route := range c.config.Routes {
prefixes := []bgp.AddrPrefixInterface{}
prefixes := []bgp.PathNLRI{}
for _, prefix := range route.Prefixes {
if af == bgp.RF_IPv4_UC && prefix.Addr().Is4() {
prefixes = append(prefixes,
bgp.NewIPAddrPrefix(uint8(prefix.Bits()), prefix.Addr().String()))
} else if af == bgp.RF_IPv6_UC && prefix.Addr().Is6() {
prefixes = append(prefixes,
bgp.NewIPv6AddrPrefix(uint8(prefix.Bits()), prefix.Addr().String()))
if af == bgp.RF_IPv4_UC && prefix.Addr().Is4() || af == bgp.RF_IPv6_UC && prefix.Addr().Is6() {
n, err := bgp.NewIPAddrPrefix(prefix)
if err != nil {
panic(err)
}
prefixes = append(prefixes, bgp.PathNLRI{
NLRI: n,
})
}
}
if len(prefixes) == 0 {
continue
}
nlri, err := bgp.NewPathAttributeMpReachNLRI(af, prefixes, nh)
if err != nil {
panic(err)
}
attrs := []bgp.PathAttributeInterface{
// bgp.NewPathAttributeNextHop("192.0.2.20"),
bgp.NewPathAttributeOrigin(1),
bgp.NewPathAttributeAsPath([]bgp.AsPathParamInterface{
bgp.NewAs4PathParam(bgp.BGP_ASPATH_ATTR_TYPE_SEQ, route.ASPath),
}),
bgp.NewPathAttributeMpReachNLRI("fe80::1", prefixes),
nlri,
}
if route.Communities != nil {
comms := make([]uint32, len(route.Communities))