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derp: add more derp stats for dropped and received packets

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Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
This commit is contained in:
Brad Fitzpatrick 2020-02-21 14:13:50 -08:00
parent c02f4b5a1f
commit 6cd81d5d1f
1 changed files with 12 additions and 2 deletions
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14
derp/derp_server.go
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@ -39,8 +39,9 @@ type Server struct {
logf logger.Logf logf logger.Logf
// Counters: // Counters:
packetsSent int64 packetsSent, bytesSent int64
bytesSent int64 packetsRecv, bytesRecv int64
packetsDropped int64
mu sync.Mutex mu sync.Mutex
closed bool closed bool
@ -221,6 +222,7 @@ func (s *Server) accept(nc net.Conn, brw *bufio.ReadWriter) error {
s.mu.Unlock() s.mu.Unlock()
if dst == nil { if dst == nil {
atomic.AddInt64(&s.packetsDropped, 1)
s.logf("derp: %s: client %x: dropping packet for unknown %x", nc.RemoteAddr(), c.key, dstKey) s.logf("derp: %s: client %x: dropping packet for unknown %x", nc.RemoteAddr(), c.key, dstKey)
continue continue
} }
@ -351,6 +353,8 @@ func (s *Server) recvPacket(ctx context.Context, br *bufio.Reader, frameLen uint
if _, err := io.ReadFull(br, contents); err != nil { if _, err := io.ReadFull(br, contents); err != nil {
return key.Public{}, nil, err return key.Public{}, nil, err
} }
atomic.AddInt64(&s.packetsRecv, 1)
atomic.AddInt64(&s.bytesRecv, int64(len(contents)))
return dstKey, contents, nil return dstKey, contents, nil
} }
@ -422,6 +426,9 @@ func (s *Server) Stats() *ServerStats {
TotalAccepts: s.accepts, TotalAccepts: s.accepts,
PacketsSent: atomic.LoadInt64(&s.packetsSent), PacketsSent: atomic.LoadInt64(&s.packetsSent),
BytesSent: atomic.LoadInt64(&s.bytesSent), BytesSent: atomic.LoadInt64(&s.bytesSent),
PacketsReceived: atomic.LoadInt64(&s.packetsRecv),
BytesReceived: atomic.LoadInt64(&s.bytesRecv),
PacketsDropped: atomic.LoadInt64(&s.packetsDropped),
} }
} }
@ -452,4 +459,7 @@ type ServerStats struct {
TotalAccepts int64 `json:"totalAccepts"` TotalAccepts int64 `json:"totalAccepts"`
PacketsSent int64 `json:"packetsSent"` PacketsSent int64 `json:"packetsSent"`
BytesSent int64 `json:"bytesSent"` BytesSent int64 `json:"bytesSent"`
PacketsReceived int64 `json:"packetsReceived"`
BytesReceived int64 `json:"bytessReceived"`
PacketsDropped int64 `json:"packetsDropped"`
} }