From 0b5bb073128b3000f383927a997d4a40d274f569 Mon Sep 17 00:00:00 2001
From: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Date: Wed, 5 Aug 2015 15:48:25 +0900
Subject: fix policy dynamic update

handle dynamic policy peer binding

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
---
 config/serve.go  | 21 +++++++++++++--------
 gobgpd/main.go   |  8 +++++++-
 server/server.go | 15 +++++++++++++++
 3 files changed, 35 insertions(+), 9 deletions(-)

diff --git a/config/serve.go b/config/serve.go
index 74529a16..a3beea30 100644
--- a/config/serve.go
+++ b/config/serve.go
@@ -35,16 +35,16 @@ func ReadConfigfileServe(path string, configCh chan BgpConfigSet, reloadCh chan
 	}
 }
 
-func inSlice(n Neighbor, b []Neighbor) bool {
-	for _, nb := range b {
+func inSlice(n Neighbor, b []Neighbor) int {
+	for i, nb := range b {
 		if nb.NeighborConfig.NeighborAddress.String() == n.NeighborConfig.NeighborAddress.String() {
-			return true
+			return i
 		}
 	}
-	return false
+	return -1
 }
 
-func UpdateConfig(curC *Bgp, newC *Bgp) (*Bgp, []Neighbor, []Neighbor) {
+func UpdateConfig(curC *Bgp, newC *Bgp) (*Bgp, []Neighbor, []Neighbor, []Neighbor) {
 	bgpConfig := Bgp{}
 	if curC == nil {
 		bgpConfig.Global = newC.Global
@@ -55,21 +55,26 @@ func UpdateConfig(curC *Bgp, newC *Bgp) (*Bgp, []Neighbor, []Neighbor) {
 	}
 	added := []Neighbor{}
 	deleted := []Neighbor{}
+	updated := []Neighbor{}
 
 	for _, n := range newC.Neighbors.NeighborList {
-		if inSlice(n, curC.Neighbors.NeighborList) == false {
+		if idx := inSlice(n, curC.Neighbors.NeighborList); idx < 0 {
 			added = append(added, n)
+		} else {
+			if !reflect.DeepEqual(n.ApplyPolicy, curC.Neighbors.NeighborList[idx].ApplyPolicy) {
+				updated = append(updated, n)
+			}
 		}
 	}
 
 	for _, n := range curC.Neighbors.NeighborList {
-		if inSlice(n, newC.Neighbors.NeighborList) == false {
+		if inSlice(n, newC.Neighbors.NeighborList) < 0 {
 			deleted = append(deleted, n)
 		}
 	}
 
 	bgpConfig.Neighbors.NeighborList = newC.Neighbors.NeighborList
-	return &bgpConfig, added, deleted
+	return &bgpConfig, added, deleted, updated
 }
 
 func CheckPolicyDifference(currentPolicy *RoutingPolicy, newPolicy *RoutingPolicy) bool {
diff --git a/gobgpd/main.go b/gobgpd/main.go
index cf327f61..7a3b3ef2 100644
--- a/gobgpd/main.go
+++ b/gobgpd/main.go
@@ -167,14 +167,16 @@ func main() {
 		case newConfig := <-configCh:
 			var added []config.Neighbor
 			var deleted []config.Neighbor
+			var updated []config.Neighbor
 
 			if bgpConfig == nil {
 				bgpServer.SetGlobalType(newConfig.Bgp.Global)
 				bgpConfig = &newConfig.Bgp
 				added = newConfig.Bgp.Neighbors.NeighborList
 				deleted = []config.Neighbor{}
+				updated = []config.Neighbor{}
 			} else {
-				bgpConfig, added, deleted = config.UpdateConfig(bgpConfig, &newConfig.Bgp)
+				bgpConfig, added, deleted, updated = config.UpdateConfig(bgpConfig, &newConfig.Bgp)
 			}
 
 			if policyConfig == nil {
@@ -195,6 +197,10 @@ func main() {
 				log.Infof("Peer %v is deleted", p.NeighborConfig.NeighborAddress)
 				bgpServer.PeerDelete(p)
 			}
+			for _, p := range updated {
+				log.Infof("Peer %v is updated", p.NeighborConfig.NeighborAddress)
+				bgpServer.PeerUpdate(p)
+			}
 		case sig := <-sigCh:
 			switch sig {
 			case syscall.SIGHUP:
diff --git a/server/server.go b/server/server.go
index 78a15da9..46184697 100644
--- a/server/server.go
+++ b/server/server.go
@@ -73,6 +73,7 @@ type BgpServer struct {
 	globalTypeCh   chan config.Global
 	addedPeerCh    chan config.Neighbor
 	deletedPeerCh  chan config.Neighbor
+	updatedPeerCh  chan config.Neighbor
 	GrpcReqCh      chan *GrpcRequest
 	listenPort     int
 	policyUpdateCh chan config.RoutingPolicy
@@ -91,6 +92,7 @@ func NewBgpServer(port int, roaURL string) *BgpServer {
 	b.globalTypeCh = make(chan config.Global)
 	b.addedPeerCh = make(chan config.Neighbor)
 	b.deletedPeerCh = make(chan config.Neighbor)
+	b.updatedPeerCh = make(chan config.Neighbor)
 	b.GrpcReqCh = make(chan *GrpcRequest, 1)
 	b.policyUpdateCh = make(chan config.RoutingPolicy)
 	b.localRibMap = make(map[string]*LocalRib)
@@ -300,6 +302,15 @@ func (server *BgpServer) Serve() {
 			} else {
 				log.Info("Can't delete a peer configuration for ", addr)
 			}
+		case config := <-server.updatedPeerCh:
+			addr := config.NeighborConfig.NeighborAddress.String()
+			peer := server.neighborMap[addr]
+			if peer.conf.RouteServer.RouteServerClient == true {
+				peer.conf.ApplyPolicy = config.ApplyPolicy
+				loc := server.localRibMap[addr]
+				loc.setPolicy(peer, server.policyMap)
+				peer.setDistributePolicy(server.policyMap)
+			}
 		case e := <-incoming:
 			peer, found := server.neighborMap[e.MsgSrc]
 			if !found {
@@ -695,6 +706,10 @@ func (server *BgpServer) PeerDelete(peer config.Neighbor) {
 	server.deletedPeerCh <- peer
 }
 
+func (server *BgpServer) PeerUpdate(peer config.Neighbor) {
+	server.updatedPeerCh <- peer
+}
+
 func (server *BgpServer) UpdatePolicy(policy config.RoutingPolicy) {
 	server.policyUpdateCh <- policy
 }
-- 
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