peer: Use a dedicated ping logger

log.go

@@ -139,6 +139,7 @@ func SetupLoggers(root *build.RotatingLogWriter, interceptor signal.Interceptor)
 	AddSubLogger(root, "AUTO", interceptor, automation.UseLogger)
 	AddSubLogger(root, "PGDB", interceptor, postgres.UseLogger)
 	AddSubLogger(root, "LCCH", interceptor, localchans.UseLogger)
+	AddSubLogger(root, "PING", interceptor, peer.UsePingLogger)
 
 	AddSubLogger(root, "LNWL", interceptor, lnwallet.UseLogger)
 	AddSubLogger(root, "DISC", interceptor, discovery.UseLogger)

peer/brontide.go

@@ -1753,7 +1753,13 @@ func (p *Brontide) logWireMessage(msg lnwire.Message, read bool) {
 		summaryPrefix = "Sending"
 	}
 
-	peerLog.Debugf("%v", newLogClosure(func() string {
+	logger := peerLog
+	switch msg.(type) {
+	case *lnwire.Ping, *lnwire.Pong:
+		logger = pingLog
+	}
+
+	logger.Debugf("%v", newLogClosure(func() string {
 		// Debug summary of message.
 		summary := messageSummary(msg)
 		if len(summary) > 0 {
@@ -1781,7 +1787,7 @@ func (p *Brontide) logWireMessage(msg lnwire.Message, read bool) {
 		prefix = "writeMessage to"
 	}
 
-	peerLog.Tracef(prefix+" %v: %v", p, newLogClosure(func() string {
+	logger.Tracef(prefix+" %v: %v", p, newLogClosure(func() string {
 		return spew.Sdump(msg)
 	}))
 }

peer/log.go

@@ -8,21 +8,31 @@ import (
 // peerLog is a logger that is initialized with the slog.Disabled logger.
 var peerLog slog.Logger
 
+// pingLog is a logger that is used to log sent and received ping/pong
+// messages.
+var pingLog slog.Logger
+
 // The default amount of logging is none.
 func init() {
 	UseLogger(build.NewSubLogger("PEER", nil))
+	UseLogger(build.NewSubLogger("PING", nil))
 }
 
 // DisableLog disables all logging output.
 func DisableLog() {
 	UseLogger(slog.Disabled)
+	UsePingLogger(slog.Disabled)
 }
 
 // UseLogger uses a specified Logger to output package logging info.
 func UseLogger(logger slog.Logger) {
 	peerLog = logger
 }
 
+func UsePingLogger(logger slog.Logger) {
+	pingLog = logger
+}
+
 // logClosure is used to provide a closure over expensive logging operations
 // so they aren't performed when the logging level doesn't warrant it.
 type logClosure func() string