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|
package config
import (
"fmt"
"github.com/osrg/gobgp/packet/bgp"
"github.com/osrg/gobgp/packet/rtr"
"github.com/spf13/viper"
"net"
)
const (
DEFAULT_HOLDTIME = 90
DEFAULT_IDLE_HOLDTIME_AFTER_RESET = 30
DEFAULT_CONNECT_RETRY = 120
DEFAULT_MPLS_LABEL_MIN = 16000
DEFAULT_MPLS_LABEL_MAX = 1048575
)
func SetDefaultConfigValues(v *viper.Viper, b *Bgp) error {
if v == nil {
v = viper.New()
}
defaultAfiSafi := func(typ AfiSafiType, enable bool) AfiSafi {
return AfiSafi{
AfiSafiName: typ,
Config: AfiSafiConfig{
AfiSafiName: typ,
Enabled: enable,
},
State: AfiSafiState{
AfiSafiName: typ,
},
}
}
if b.Global.Zebra.Url == "" {
b.Global.Zebra.Url = "unix:/var/run/quagga/zserv.api"
}
if len(b.Global.AfiSafis) == 0 {
b.Global.AfiSafis = []AfiSafi{}
for k, _ := range AfiSafiTypeToIntMap {
b.Global.AfiSafis = append(b.Global.AfiSafis, defaultAfiSafi(k, true))
}
}
if b.Global.ListenConfig.Port == 0 {
b.Global.ListenConfig.Port = bgp.BGP_PORT
}
if len(b.Global.ListenConfig.LocalAddressList) == 0 {
b.Global.ListenConfig.LocalAddressList = []string{"0.0.0.0", "::"}
}
for idx, server := range b.BmpServers {
if server.Config.Port == 0 {
server.Config.Port = bgp.BMP_DEFAULT_PORT
}
b.BmpServers[idx] = server
}
if b.Global.MplsLabelRange.MinLabel == 0 {
b.Global.MplsLabelRange.MinLabel = DEFAULT_MPLS_LABEL_MIN
}
if b.Global.MplsLabelRange.MaxLabel == 0 {
b.Global.MplsLabelRange.MaxLabel = DEFAULT_MPLS_LABEL_MAX
}
// yaml is decoded as []interface{}
// but toml is decoded as []map[string]interface{}.
// currently, viper can't hide this difference.
// handle the difference here.
extractArray := func(intf interface{}) ([]interface{}, error) {
if intf != nil {
list, ok := intf.([]interface{})
if ok {
return list, nil
}
l, ok := intf.([]map[string]interface{})
if !ok {
return nil, fmt.Errorf("invalid configuration: neither []interface{} nor []map[string]interface{}")
}
list = make([]interface{}, 0, len(l))
for _, m := range l {
list = append(list, m)
}
return list, nil
}
return nil, nil
}
list, err := extractArray(v.Get("neighbors"))
if err != nil {
return err
}
for idx, n := range b.Neighbors {
vv := viper.New()
if len(list) > idx {
vv.Set("neighbor", list[idx])
}
if !vv.IsSet("neighbor.timers.config.connect-retry") {
n.Timers.Config.ConnectRetry = float64(DEFAULT_CONNECT_RETRY)
}
if !vv.IsSet("neighbor.timers.config.hold-time") {
n.Timers.Config.HoldTime = float64(DEFAULT_HOLDTIME)
}
if !vv.IsSet("neighbor.timers.config.keepalive-interval") {
n.Timers.Config.KeepaliveInterval = n.Timers.Config.HoldTime / 3
}
if !vv.IsSet("neighbor.timers.config.idle-hold-time-after-reset") {
n.Timers.Config.IdleHoldTimeAfterReset = float64(DEFAULT_IDLE_HOLDTIME_AFTER_RESET)
}
if !vv.IsSet("neighbor.afi-safis") {
if ip := net.ParseIP(n.Config.NeighborAddress); ip.To4() != nil {
n.AfiSafis = []AfiSafi{defaultAfiSafi(AFI_SAFI_TYPE_IPV4_UNICAST, true)}
} else if ip.To16() != nil {
n.AfiSafis = []AfiSafi{defaultAfiSafi(AFI_SAFI_TYPE_IPV6_UNICAST, true)}
} else {
return fmt.Errorf("invalid neighbor address: %s", n.Config.NeighborAddress)
}
} else {
afs, err := extractArray(vv.Get("neighbor.afi-safis"))
if err != nil {
return err
}
for i, af := range n.AfiSafis {
vvv := viper.New()
if len(afs) > i {
vvv.Set("afi-safi", afs[i])
}
af.Config.AfiSafiName = af.AfiSafiName
af.State.AfiSafiName = af.AfiSafiName
if !vvv.IsSet("afi-safi.config") {
af.Config.Enabled = true
}
n.AfiSafis[i] = af
}
}
if !vv.IsSet("neighbor.config.local-as") {
n.Config.LocalAs = b.Global.Config.As
}
if !vv.IsSet("neighbor.config.peer-type") {
if n.Config.PeerAs != n.Config.LocalAs {
n.Config.PeerType = PEER_TYPE_EXTERNAL
} else {
n.Config.PeerType = PEER_TYPE_INTERNAL
}
}
if n.GracefulRestart.Config.Enabled {
if !vv.IsSet("neighbor.graceful-restart.config.restart-time") {
// RFC 4724 4. Operation
// A suggested default for the Restart Time is a value less than or
// equal to the HOLDTIME carried in the OPEN.
n.GracefulRestart.Config.RestartTime = uint16(n.Timers.Config.HoldTime)
}
if !vv.IsSet("neighbor.graceful-restart.config.deferral-time") {
// RFC 4724 4.1. Procedures for the Restarting Speaker
// The value of this timer should be large
// enough, so as to provide all the peers of the Restarting Speaker with
// enough time to send all the routes to the Restarting Speaker
n.GracefulRestart.Config.DeferralTime = uint16(360)
}
}
b.Neighbors[idx] = n
}
for _, r := range b.RpkiServers {
if r.Config.Port == 0 {
r.Config.Port = rtr.RPKI_DEFAULT_PORT
}
}
return nil
}
|
