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// Copyright (C) 2016 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 gobgpapi
import (
"encoding/json"
"net"
"time"
"github.com/osrg/gobgp/config"
"github.com/osrg/gobgp/packet/bgp"
)
func getNLRI(family bgp.RouteFamily, buf []byte) (bgp.AddrPrefixInterface, error) {
afi, safi := bgp.RouteFamilyToAfiSafi(family)
nlri, err := bgp.NewPrefixFromRouteFamily(afi, safi)
if err != nil {
return nil, err
}
if err := nlri.DecodeFromBytes(buf); err != nil {
return nil, err
}
return nlri, nil
}
func (d *Destination) MarshalJSON() ([]byte, error) {
return json.Marshal(d.Paths)
}
func NewPath(nlri bgp.AddrPrefixInterface, isWithdraw bool, attrs []bgp.PathAttributeInterface, age time.Time) *Path {
return &Path{
AnyNlri: MarshalNLRI(nlri),
AnyPattrs: MarshalPathAttributes(attrs),
Age: age.Unix(),
IsWithdraw: isWithdraw,
Family: uint32(bgp.AfiSafiToRouteFamily(nlri.AFI(), nlri.SAFI())),
Identifier: nlri.PathIdentifier(),
}
}
func (p *Path) MarshalJSON() ([]byte, error) {
nlri, err := p.GetNativeNlri()
if err != nil {
return nil, err
}
attrs, err := p.GetNativePathAttributes()
if err != nil {
return nil, err
}
return json.Marshal(struct {
Nlri bgp.AddrPrefixInterface `json:"nlri"`
Age int64 `json:"age"`
Best bool `json:"best"`
Attrs []bgp.PathAttributeInterface `json:"attrs"`
Stale bool `json:"stale"`
Withdrawal bool `json:"withdrawal,omitempty"`
SourceID net.IP `json:"source-id,omitempty"`
NeighborIP net.IP `json:"neighbor-ip,omitempty"`
}{
Nlri: nlri,
Age: p.Age,
Best: p.Best,
Attrs: attrs,
Stale: p.Stale,
Withdrawal: p.IsWithdraw,
SourceID: net.ParseIP(p.SourceId),
NeighborIP: net.ParseIP(p.NeighborIp),
})
}
func (p *Path) GetNativeNlri() (bgp.AddrPrefixInterface, error) {
if len(p.Nlri) > 0 {
return getNLRI(bgp.RouteFamily(p.Family), p.Nlri)
}
return UnmarshalNLRI(bgp.RouteFamily(p.Family), p.AnyNlri)
}
func (p *Path) GetNativePathAttributes() ([]bgp.PathAttributeInterface, error) {
pattrsLen := len(p.Pattrs)
if pattrsLen > 0 {
pattrs := make([]bgp.PathAttributeInterface, 0, pattrsLen)
for _, attr := range p.Pattrs {
a, err := bgp.GetPathAttribute(attr)
if err != nil {
return nil, err
}
err = a.DecodeFromBytes(attr)
if err != nil {
return nil, err
}
pattrs = append(pattrs, a)
}
return pattrs, nil
}
return UnmarshalPathAttributes(p.AnyPattrs)
}
func extractFamilyFromConfigAfiSafi(c *config.AfiSafi) uint32 {
if c == nil {
return 0
}
// If address family value is already stored in AfiSafiState structure,
// we prefer to use this value.
if c.State.Family != 0 {
return uint32(c.State.Family)
}
// In case that Neighbor structure came from CLI or gRPC, address family
// value in AfiSafiState structure can be omitted.
// Here extracts value from AfiSafiName field in AfiSafiConfig structure.
if rf, err := bgp.GetRouteFamily(string(c.Config.AfiSafiName)); err == nil {
return uint32(rf)
}
// Ignores invalid address family name
return 0
}
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