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|
package config
import (
log "github.com/Sirupsen/logrus"
"github.com/spf13/viper"
"os"
"os/signal"
"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"`
Zebra Zebra `mapstructure:"zebra"`
Collector Collector `mapstructure:"collector"`
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 = setDefaultConfigValuesWithViper(v, c); err != nil {
goto ERROR
}
if cnt == 0 {
log.WithFields(log.Fields{
"Topic": "Config",
}).Info("Finished reading the config file")
}
cnt++
configCh <- c
goto NEXT
ERROR:
if cnt == 0 {
log.WithFields(log.Fields{
"Topic": "Config",
"Error": err,
}).Fatalf("Can't read config file %s", path)
} else {
log.WithFields(log.Fields{
"Topic": "Config",
"Error": err,
}).Warningf("Can't read config file %s", path)
}
NEXT:
select {
case <-sigCh:
log.WithFields(log.Fields{
"Topic": "Config",
}).Info("Reload the config file")
}
}
}
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, newC *BgpConfigSet) ([]Neighbor, []Neighbor, []Neighbor, bool) {
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 !n.Equal(&curC.Neighbors[idx]) {
log.WithFields(log.Fields{
"Topic": "Config",
}).Debugf("Current neighbor config:%s", curC.Neighbors[idx])
log.WithFields(log.Fields{
"Topic": "Config",
}).Debugf("New neighbor config:%s", n)
updated = append(updated, n)
}
}
for _, n := range curC.Neighbors {
if inSlice(n, newC.Neighbors) < 0 {
deleted = append(deleted, n)
}
}
return added, deleted, updated, CheckPolicyDifference(ConfigSetToRoutingPolicy(curC), ConfigSetToRoutingPolicy(newC))
}
func CheckPolicyDifference(currentPolicy *RoutingPolicy, newPolicy *RoutingPolicy) bool {
log.WithFields(log.Fields{
"Topic": "Config",
}).Debugf("Current policy:%s", currentPolicy)
log.WithFields(log.Fields{
"Topic": "Config",
}).Debugf("New policy:%s", newPolicy)
var result bool = false
if currentPolicy == nil && newPolicy == nil {
result = false
} else {
if currentPolicy != nil && newPolicy != nil {
result = !currentPolicy.Equal(newPolicy)
} else {
result = true
}
}
return result
}
|
