josh/jrouter
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Add route table observers

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This commit is contained in:
Josh Deprez 2024-05-24 15:55:34 +10:00
parent d25c2eb362
commit 9e3b311b56
Signed by: josh
SSH key fingerprint: SHA256:zZji7w1Ilh2RuUpbQcqkLPrqmRwpiCSycbF2EfKm6Kw
3 changed files with 92 additions and 31 deletions
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38
router/peer_aurp.go
View file

@ -114,6 +114,9 @@ type AURPPeer struct {
// Route table (the peer will add/remove/update routes and zones)
RouteTable *RouteTable
// Event tuples yet to be sent to this peer in an RI-Upd.
pendingEvents chan aurp.EventTuple
// The internal states below are only set within the Handle loop, but can
// be read concurrently from outside.
mu sync.RWMutex
@ -126,6 +129,41 @@ type AURPPeer struct {
sendRetries int
}
func (p *AURPPeer) addPendingEvent(ec aurp.EventCode, route *Route) {
// Don't advertise routes to AURP peers to other AURP peers
if route.AURPPeer != nil {
return
}
et := aurp.EventTuple{
EventCode: ec,
Extended: route.Extended,
RangeStart: route.NetStart,
Distance: route.Distance,
RangeEnd: route.NetEnd,
}
switch ec {
case aurp.EventCodeND, aurp.EventCodeNRC:
et.Distance = 0 // "The distance field does not apply to ND or NRC event tuples and should be set to 0."
}
p.pendingEvents <- et
}
func (p *AURPPeer) RouteAdded(route *Route) {
p.addPendingEvent(aurp.EventCodeNA, route)
}
func (p *AURPPeer) RouteDeleted(route *Route) {
p.addPendingEvent(aurp.EventCodeND, route)
}
func (p *AURPPeer) RouteDistanceChanged(route *Route) {
p.addPendingEvent(aurp.EventCodeNDC, route)
}
func (p *AURPPeer) RouteForwarderChanged(route *Route) {
p.addPendingEvent(aurp.EventCodeNRC, route)
}
func (p *AURPPeer) Forward(ddpkt *ddp.ExtPacket) error {
outPkt, err := ddp.ExtMarshal(*ddpkt)
if err != nil {

69
router/route.go
View file

@ -55,17 +55,40 @@ func (r *Route) Valid() bool {
return len(r.ZoneNames) > 0 && (r.EtherTalkPeer == nil || time.Since(r.LastSeen) <= maxRouteAge)
}
type RouteTableObserver interface {
RouteAdded(*Route)
RouteDeleted(*Route)
RouteDistanceChanged(*Route)
RouteForwarderChanged(*Route)
}
type RouteTable struct {
mu sync.Mutex
routes map[*Route]struct{}
routesMu sync.RWMutex
routes map[*Route]struct{}
observersMu sync.RWMutex
observers map[RouteTableObserver]struct{}
}
func NewRouteTable() *RouteTable {
return &RouteTable{
routes: make(map[*Route]struct{}),
routes: make(map[*Route]struct{}),
observers: make(map[RouteTableObserver]struct{}),
}
}
func (rt *RouteTable) AddObserver(obs RouteTableObserver) {
rt.observersMu.Lock()
defer rt.observersMu.Unlock()
rt.observers[obs] = struct{}{}
}
func (rt *RouteTable) RemoveObserver(obs RouteTableObserver) {
rt.observersMu.Lock()
defer rt.observersMu.Unlock()
delete(rt.observers, obs)
}
func (rt *RouteTable) InsertEtherTalkDirect(port *EtherTalkPort) {
r := &Route{
Extended: true,
@ -77,14 +100,14 @@ func (rt *RouteTable) InsertEtherTalkDirect(port *EtherTalkPort) {
EtherTalkDirect: port,
}
rt.mu.Lock()
defer rt.mu.Unlock()
rt.routesMu.Lock()
defer rt.routesMu.Unlock()
rt.routes[r] = struct{}{}
}
func (rt *RouteTable) Dump() []Route {
rt.mu.Lock()
defer rt.mu.Unlock()
rt.routesMu.Lock()
defer rt.routesMu.Unlock()
table := make([]Route, 0, len(rt.routes))
for r := range rt.routes {
@ -94,8 +117,8 @@ func (rt *RouteTable) Dump() []Route {
}
func (rt *RouteTable) LookupRoute(network ddp.Network) *Route {
rt.mu.Lock()
defer rt.mu.Unlock()
rt.routesMu.Lock()
defer rt.routesMu.Unlock()
var bestRoute *Route
for r := range rt.routes {
@ -117,8 +140,8 @@ func (rt *RouteTable) LookupRoute(network ddp.Network) *Route {
}
func (rt *RouteTable) DeleteAURPPeer(peer *AURPPeer) {
rt.mu.Lock()
defer rt.mu.Unlock()
rt.routesMu.Lock()
defer rt.routesMu.Unlock()
for route := range rt.routes {
if route.AURPPeer == peer {
@ -128,8 +151,8 @@ func (rt *RouteTable) DeleteAURPPeer(peer *AURPPeer) {
}
func (rt *RouteTable) DeleteAURPPeerNetwork(peer *AURPPeer, network ddp.Network) {
rt.mu.Lock()
defer rt.mu.Unlock()
rt.routesMu.Lock()
defer rt.routesMu.Unlock()
for route := range rt.routes {
if route.AURPPeer == peer && route.NetStart == network {
@ -139,8 +162,8 @@ func (rt *RouteTable) DeleteAURPPeerNetwork(peer *AURPPeer, network ddp.Network)
}
func (rt *RouteTable) UpdateAURPRouteDistance(peer *AURPPeer, network ddp.Network, distance uint8) {
rt.mu.Lock()
defer rt.mu.Unlock()
rt.routesMu.Lock()
defer rt.routesMu.Unlock()
for route := range rt.routes {
if route.AURPPeer == peer && route.NetStart == network {
@ -158,8 +181,8 @@ func (rt *RouteTable) UpsertEtherTalkRoute(peer *EtherTalkPeer, extended bool, n
return nil, fmt.Errorf("invalid network range [%d, %d] for nonextended network", netStart, netEnd)
}
rt.mu.Lock()
defer rt.mu.Unlock()
rt.routesMu.Lock()
defer rt.routesMu.Unlock()
// Update?
for r := range rt.routes {
@ -210,16 +233,16 @@ func (rt *RouteTable) InsertAURPRoute(peer *AURPPeer, extended bool, netStart, n
AURPPeer: peer,
}
rt.mu.Lock()
defer rt.mu.Unlock()
rt.routesMu.Lock()
defer rt.routesMu.Unlock()
rt.routes[r] = struct{}{}
return nil
}
// ValidRoutes returns all valid routes.
func (rt *RouteTable) ValidRoutes() []*Route {
rt.mu.Lock()
defer rt.mu.Unlock()
rt.routesMu.RLock()
defer rt.routesMu.RUnlock()
valid := make([]*Route, 0, len(rt.routes))
for r := range rt.routes {
if r.Valid() {
@ -231,8 +254,8 @@ func (rt *RouteTable) ValidRoutes() []*Route {
// ValidNonAURPRoutes returns all valid routes that were not learned via AURP.
func (rt *RouteTable) ValidNonAURPRoutes() []*Route {
rt.mu.Lock()
defer rt.mu.Unlock()
rt.routesMu.RLock()
defer rt.routesMu.RUnlock()
valid := make([]*Route, 0, len(rt.routes))
for r := range rt.routes {
if r.AURPPeer != nil {

16
router/zones.go
View file

@ -23,8 +23,8 @@ import (
)
func (rt *RouteTable) AddZonesToNetwork(n ddp.Network, zs ...string) {
rt.mu.Lock()
defer rt.mu.Unlock()
rt.routesMu.Lock()
defer rt.routesMu.Unlock()
for r := range rt.routes {
if n < r.NetStart || n > r.NetEnd {
continue
@ -39,8 +39,8 @@ func (rt *RouteTable) AddZonesToNetwork(n ddp.Network, zs ...string) {
func (rt *RouteTable) ZonesForNetworks(ns []ddp.Network) map[ddp.Network][]string {
zs := make(map[ddp.Network][]string)
rt.mu.Lock()
defer rt.mu.Unlock()
rt.routesMu.Lock()
defer rt.routesMu.Unlock()
for r := range rt.routes {
if !r.Valid() {
continue
@ -55,8 +55,8 @@ func (rt *RouteTable) ZonesForNetworks(ns []ddp.Network) map[ddp.Network][]strin
}
func (rt *RouteTable) RoutesForZone(zone string) []*Route {
rt.mu.Lock()
defer rt.mu.Unlock()
rt.routesMu.Lock()
defer rt.routesMu.Unlock()
var routes []*Route
for r := range rt.routes {
@ -73,8 +73,8 @@ func (rt *RouteTable) RoutesForZone(zone string) []*Route {
func (rt *RouteTable) AllZoneNames() (zones []string) {
defer slices.Sort(zones)
rt.mu.Lock()
defer rt.mu.Unlock()
rt.routesMu.Lock()
defer rt.routesMu.Unlock()
zs := make(StringSet)
for r := range rt.routes {