config: set default config value only when not specified

Signed-off-by: FUJITA Tomonori <[email protected]>

config/default.go

@@ -1,22 +1,44 @@
 package config
 
+import (
+	"github.com/BurntSushi/toml"
+	"strings"
+)
+
 const (
 	DEFAULT_HOLDTIME                  = 90
 	DEFAULT_IDLE_HOLDTIME_AFTER_RESET = 30
 )
 
-func setTimersTypeDefault(timersT *TimersType) {
-	if timersT.HoldTime == 0 {
-		timersT.HoldTime = float64(DEFAULT_HOLDTIME)
-	}
-	if timersT.KeepaliveInterval == 0 {
-		timersT.KeepaliveInterval = timersT.HoldTime / 3
-	}
-	if timersT.IdleHoldTImeAfterReset == 0 {
-		timersT.IdleHoldTImeAfterReset = float64(DEFAULT_IDLE_HOLDTIME_AFTER_RESET)
-	}
+type neighbor struct {
+	attributes map[string]bool
 }
 
-func SetNeighborTypeDefault(neighborT *NeighborType) {
-	setTimersTypeDefault(&neighborT.Timers)
+func SetDefaultConfigValues(md toml.MetaData, bt *BgpType) {
+	neighbors := []neighbor{}
+
+	nidx := 0
+	for _, key := range md.Keys() {
+		if !strings.HasPrefix(key.String(), "NeighborList") {
+			continue
+		}
+		if key.String() == "NeighborList" {
+			neighbors = append(neighbors, neighbor{attributes: make(map[string]bool)})
+			nidx++
+		} else {
+			neighbors[nidx-1].attributes[key.String()] = true
+		}
+	}
+	for i, n := range neighbors {
+		if _, ok := n.attributes["NeighborList.Timers.HoldTime"]; !ok {
+			bt.NeighborList[i].Timers.HoldTime = float64(DEFAULT_HOLDTIME)
+		}
+		if _, ok := n.attributes["NeighborList.Timers.KeepaliveInterval"]; !ok {
+			bt.NeighborList[i].Timers.KeepaliveInterval = bt.NeighborList[i].Timers.HoldTime / 3
+		}
+
+		if _, ok := n.attributes["NeighborList.Timers.IdleHoldTImeAfterReset"]; !ok {
+			bt.NeighborList[i].Timers.IdleHoldTImeAfterReset = float64(DEFAULT_IDLE_HOLDTIME_AFTER_RESET)
+		}
+	}
 }

config/serve.go

@@ -10,14 +10,11 @@ func ReadConfigfileServe(path string, configCh chan BgpType, reloadCh chan bool)
 		<-reloadCh
 
 		b := BgpType{}
-		_, err := toml.DecodeFile(path, &b)
+		md, err := toml.DecodeFile(path, &b)
 		if err != nil {
-			log.Fatal("can't read config file ", path)
+			log.Fatal("can't read config file ", path, err)
 		} else {
-			// TODO: validate configuration
-			for i, _ := range b.NeighborList {
-				SetNeighborTypeDefault(&b.NeighborList[i])
-			}
+			SetDefaultConfigValues(md, &b)
 		}
 
 		configCh <- b