device: remove selects from encrypt/decrypt/inbound/outbound enqueuing

Block instead. Backpressure here is fine, probably preferable.
This reduces code complexity.

Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>

1 files changed, 2 insertions, 18 deletions

diff --git a/device/send.go b/device/send.go
index 55df4b3..c9b62e6 100644
--- a/device/send.go
+++ b/device/send.go
@@ -97,23 +97,6 @@ func addToNonceQueue(queue chan *QueueOutboundElement, elem *QueueOutboundElemen
 	}
 }
 
-func addToOutboundAndEncryptionQueues(outboundQueue chan *QueueOutboundElement, encryptionQueue chan *QueueOutboundElement, elem *QueueOutboundElement) {
-	select {
-	case outboundQueue <- elem:
-		select {
-		case encryptionQueue <- elem:
-			return
-		default:
-			elem.Drop()
-			elem.peer.device.PutMessageBuffer(elem.buffer)
-			elem.Unlock()
-		}
-	default:
-		elem.peer.device.PutMessageBuffer(elem.buffer)
-		elem.peer.device.PutOutboundElement(elem)
-	}
-}
-
 /* Queues a keepalive if no packets are queued for peer
  */
 func (peer *Peer) SendKeepalive() bool {
@@ -457,7 +440,8 @@ NextPacket:
 			elem.Lock()
 
 			// add to parallel and sequential queue
-			addToOutboundAndEncryptionQueues(peer.queue.outbound, device.queue.encryption.c, elem)
+			peer.queue.outbound <- elem
+			device.queue.encryption.c <- elem
 		}
 	}
 }