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derp: sprinkle comments and docstrings.

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Signed-off-by: David Anderson <dave@natulte.net>
This commit is contained in:
David Anderson 2020-03-20 12:00:20 -07:00 committed by Dave Anderson
parent 58b8ebd290
commit 64b5248929
1 changed files with 10 additions and 6 deletions
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16
derp/derp_server.go
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@ -51,11 +51,11 @@ type Server struct {
packetsRecv, bytesRecv expvar.Int
packetsDropped expvar.Int
packetsDroppedReason metrics.LabelMap
packetsDroppedUnknown *expvar.Int
packetsDroppedGone *expvar.Int
packetsDroppedQueueHead *expvar.Int
packetsDroppedQueueTail *expvar.Int
packetsDroppedWrite *expvar.Int
packetsDroppedUnknown *expvar.Int // unknown dst pubkey
packetsDroppedGone *expvar.Int // dst conn shutting down
packetsDroppedQueueHead *expvar.Int // queue full, drop head packet
packetsDroppedQueueTail *expvar.Int // queue full, drop tail packet
packetsDroppedWrite *expvar.Int // error writing to dst conn
accepts expvar.Int
curClients expvar.Int
curHomeClients expvar.Int // ones with preferred
@ -486,7 +486,7 @@ type sclient struct {
type pkt struct {
src key.Public
bs []byte
bs []byte // pkt owns backing array
// TODO(danderson): enqueue time, to measure queue latency?
}
@ -587,6 +587,10 @@ func (c *sclient) sendKeepalive() error {
return c.bw.Flush()
}
// sendPacket writes contents to the client in a RecvPacket frame. If
// srcKey.IsZero, uses the old DERPv1 framing format, otherwise uses
// DERPv2. The bytes of contents are only valid until this function
// returns, do not retain slices.
func (c *sclient) sendPacket(srcKey key.Public, contents []byte) (err error) {
defer func() {
// Stats update.