josh/jrouter
josh/jrouter
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Output / Forward

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This commit is contained in:
Josh Deprez 2024-05-04 15:36:33 +10:00
parent a239b7734f
commit 298ae0935f
Signed by: josh
SSH key fingerprint: SHA256:zZji7w1Ilh2RuUpbQcqkLPrqmRwpiCSycbF2EfKm6Kw
5 changed files with 19 additions and 12 deletions
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2
router/aep.go
View file

@ -47,7 +47,7 @@ func (rtr *Router) HandleAEP(ctx context.Context, ddpkt *ddp.ExtPacket) error {
ddpkt.DstSocket, ddpkt.SrcSocket = ddpkt.SrcSocket, ddpkt.DstSocket
ddpkt.Data[0] = byte(aep.EchoReply)
return rtr.Forward(ctx, ddpkt)
return rtr.Output(ctx, ddpkt)
default:
return fmt.Errorf("invalid AEP function %d", ep.Function)

4
router/nbp.go
View file

@ -65,7 +65,7 @@ func (rtr *Router) handleNBPFwdReq(ctx context.Context, ddpkt *ddp.ExtPacket, nb
if err != nil || outDDP == nil {
return err
}
if err := rtr.Forward(ctx, outDDP); err != nil {
if err := rtr.Output(ctx, outDDP); err != nil {
return err
}
}
@ -200,7 +200,7 @@ func (port *EtherTalkPort) handleNBPBrRq(ctx context.Context, ddpkt *ddp.ExtPack
Data: nbpRaw,
}
if err := port.Router.Forward(ctx, outDDP); err != nil {
if err := port.Router.Output(ctx, outDDP); err != nil {
return err
}
}

2
router/route.go
View file

@ -142,7 +142,7 @@ func (rt *RouteTable) UpdateAURPRouteDistance(peer *AURPPeer, network ddp.Networ
}
}
func (rt *RouteTable) UpsertEthRoute(peer *EtherTalkPeer, extended bool, netStart, netEnd ddp.Network, metric uint8) error {
func (rt *RouteTable) UpsertEtherTalkRoute(peer *EtherTalkPeer, extended bool, netStart, netEnd ddp.Network, metric uint8) error {
if netStart > netEnd {
return fmt.Errorf("invalid network range [%d, %d]", netStart, netEnd)
}

11
router/router.go
View file

@ -30,9 +30,8 @@ type Router struct {
Ports []*EtherTalkPort
}
// Forward routes a packet towards the right destination.
// It increments the hop count, then looks up the best route for the network,
// then transmits the packet according to the route.
// Forward increments the hop count, then outputs the packet in the direction
// of the destination.
func (rtr *Router) Forward(ctx context.Context, ddpkt *ddp.ExtPacket) error {
// Check and adjust the Hop Count
// Note the ddp package doesn't make this simple
@ -44,6 +43,12 @@ func (rtr *Router) Forward(ctx context.Context, ddpkt *ddp.ExtPacket) error {
ddpkt.Size &^= 0x3C00
ddpkt.Size |= hopCount << 10
return rtr.Output(ctx, ddpkt)
}
// Output outputs the packet in the direction of the destination.
// (It does not check or adjust the hop count.)
func (rtr *Router) Output(ctx context.Context, ddpkt *ddp.ExtPacket) error {
switch route := rtr.RouteTable.LookupRoute(ddpkt.DstNet); {
case route == nil:
return fmt.Errorf("no route for packet (dstnet %d); dropping packet", ddpkt.DstNet)

12
router/rtmp.go
View file

@ -67,7 +67,7 @@ func (port *EtherTalkPort) HandleRTMP(ctx context.Context, pkt *ddp.ExtPacket) e
Data: respPktRaw,
}
if err := port.Router.Forward(ctx, ddpPkt); err != nil {
if err := port.Router.Output(ctx, ddpPkt); err != nil {
return fmt.Errorf("send Response: %w", err)
}
@ -95,7 +95,7 @@ func (port *EtherTalkPort) HandleRTMP(ctx context.Context, pkt *ddp.ExtPacket) e
Data: dataPktRaw,
}
if err := port.Router.Forward(ctx, ddpPkt); err != nil {
if err := port.Router.Output(ctx, ddpPkt); err != nil {
return fmt.Errorf("send Data: %w", err)
}
}
@ -119,7 +119,7 @@ func (port *EtherTalkPort) HandleRTMP(ctx context.Context, pkt *ddp.ExtPacket) e
}
for _, rt := range dataPkt.NetworkTuples {
if err := port.Router.RouteTable.UpsertEthRoute(peer, rt.Extended, rt.RangeStart, rt.RangeEnd, rt.Distance+1); err != nil {
if err := port.Router.RouteTable.UpsertEtherTalkRoute(peer, rt.Extended, rt.RangeStart, rt.RangeEnd, rt.Distance+1); err != nil {
log.Printf("RTMP: Couldn't upsert EtherTalk route: %v", err)
}
}
@ -150,7 +150,7 @@ func (port *EtherTalkPort) RunRTMP(ctx context.Context) (err error) {
log.Printf("RTMP: Couldn't broadcast Data: %v", err)
}
setStatus("Starting packet loop")
setStatus("Starting broadcast loop")
bcastTicker := time.NewTicker(10 * time.Second)
defer bcastTicker.Stop()
@ -163,7 +163,9 @@ func (port *EtherTalkPort) RunRTMP(ctx context.Context) (err error) {
case <-bcastTicker.C:
setStatus("Broadcasting RTMP Data")
if err := port.broadcastRTMPData(); err != nil {
log.Printf("RTMP: Couldn't broadcast Data: %v", err)
st := fmt.Sprintf("Couldn't broadcast Data: %v", err)
setStatus(st)
log.Print(st)
}
}
}