func NewRib(seq uint32, prefix bgp.AddrPrefixInterface, entries []*RibEntry) *Rib {
rf := bgp.AfiSafiToRouteFamily(prefix.AFI(), prefix.SAFI())
return &Rib{
SequenceNumber: seq,
Prefix: prefix,
Entries: entries,
RouteFamily: rf,
}
}
func NewDestination(nlri bgp.AddrPrefixInterface) *Destination {
d := &Destination{
routeFamily: bgp.AfiSafiToRouteFamily(nlri.AFI(), nlri.SAFI()),
nlri: nlri,
knownPathList: make([]*Path, 0),
withdrawList: make([]*Path, 0),
newPathList: make([]*Path, 0),
}
switch d.routeFamily {
case bgp.RF_IPv4_UC, bgp.RF_IPv6_UC:
d.RadixKey = CidrToRadixkey(nlri.String())
}
return d
}
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
}