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|
package config
import (
log "github.com/Sirupsen/logrus"
"github.com/spf13/viper"
"os"
"os/signal"
"reflect"
"syscall"
)
type BgpConfigSet struct {
Global Global `mapstructure:"global"`
Neighbors []Neighbor `mapstructure:"neighbors"`
PeerGroups []PeerGroup `mapstructure:"peer-groups"`
RpkiServers []RpkiServer `mapstructure:"rpki-servers"`
BmpServers []BmpServer `mapstructure:"bmp-servers"`
MrtDump []Mrt `mapstructure:"mrt-dump"`
DefinedSets DefinedSets `mapstructure:"defined-sets"`
PolicyDefinitions []PolicyDefinition `mapstructure:"policy-definitions"`
}
func ReadConfigfileServe(path, format string, configCh chan *BgpConfigSet) {
sigCh := make(chan os.Signal, 1)
signal.Notify(sigCh, syscall.SIGHUP)
cnt := 0
for {
c := &BgpConfigSet{}
v := viper.New()
v.SetConfigFile(path)
v.SetConfigType(format)
var err error
if err = v.ReadInConfig(); err != nil {
goto ERROR
}
if err = v.UnmarshalExact(c); err != nil {
goto ERROR
}
if err = SetDefaultConfigValues(v, c); err != nil {
goto ERROR
}
if cnt == 0 {
log.Info("finished reading the config file")
}
cnt++
configCh <- c
select {
case <-sigCh:
log.Info("reload the config file")
}
continue
ERROR:
if cnt == 0 {
log.Fatal("can't read config file ", path, ", ", err)
} else {
log.Warning("can't read config file ", path, ", ", err)
continue
}
}
}
func inSlice(n Neighbor, b []Neighbor) int {
for i, nb := range b {
if nb.Config.NeighborAddress == n.Config.NeighborAddress {
return i
}
}
return -1
}
func ConfigSetToRoutingPolicy(c *BgpConfigSet) *RoutingPolicy {
return &RoutingPolicy{
DefinedSets: c.DefinedSets,
PolicyDefinitions: c.PolicyDefinitions,
}
}
func UpdateConfig(curC *BgpConfigSet, newC *BgpConfigSet) (*BgpConfigSet, []Neighbor, []Neighbor, []Neighbor, bool) {
bgpConfig := &BgpConfigSet{}
if curC == nil {
bgpConfig.Global = newC.Global
curC = bgpConfig
} else {
// can't update the global config
bgpConfig.Global = curC.Global
}
added := []Neighbor{}
deleted := []Neighbor{}
updated := []Neighbor{}
for _, n := range newC.Neighbors {
if idx := inSlice(n, curC.Neighbors); idx < 0 {
added = append(added, n)
} else {
if !reflect.DeepEqual(n.ApplyPolicy, curC.Neighbors[idx].ApplyPolicy) {
updated = append(updated, n)
}
}
}
for _, n := range curC.Neighbors {
if inSlice(n, newC.Neighbors) < 0 {
deleted = append(deleted, n)
}
}
bgpConfig.Neighbors = newC.Neighbors
return bgpConfig, added, deleted, updated, CheckPolicyDifference(ConfigSetToRoutingPolicy(curC), ConfigSetToRoutingPolicy(newC))
}
func CheckPolicyDifference(currentPolicy *RoutingPolicy, newPolicy *RoutingPolicy) bool {
log.Debug("current policy : ", currentPolicy)
log.Debug("newPolicy policy : ", newPolicy)
var result bool = false
if currentPolicy == nil && newPolicy == nil {
result = false
} else {
if currentPolicy != nil && newPolicy != nil {
// TODO: reconsider the way of policy object comparison
result = !reflect.DeepEqual(*currentPolicy, *newPolicy)
} else {
result = true
}
}
return result
}
|
