From 1d4af2d92bcae7ec394830e58435ded6454882ef Mon Sep 17 00:00:00 2001
From: Larvan2 <78135608+Larvan2@users.noreply.github.com>
Date: Sun, 3 Sep 2023 20:42:54 +0800
Subject: [PATCH] chore: TCPKeepAlive interval set to 15s by default

---
 common/net/tcpip.go | 2 +-
 config/config.go    | 8 ++++----
 docs/config.yaml    | 3 ++-
 3 files changed, 7 insertions(+), 6 deletions(-)

diff --git a/common/net/tcpip.go b/common/net/tcpip.go
index 171191e24..7bc31edd4 100644
--- a/common/net/tcpip.go
+++ b/common/net/tcpip.go
@@ -7,7 +7,7 @@ import (
 	"time"
 )
 
-var KeepAliveInterval time.Duration
+var KeepAliveInterval = 15 * time.Second
 
 func SplitNetworkType(s string) (string, string, error) {
 	var (
diff --git a/config/config.go b/config/config.go
index cb0305309..4421adc23 100644
--- a/config/config.go
+++ b/config/config.go
@@ -571,11 +571,11 @@ func parseGeneral(cfg *RawConfig) (*General, error) {
 	C.GeoSiteUrl = cfg.GeoXUrl.GeoSite
 	C.MmdbUrl = cfg.GeoXUrl.Mmdb
 	C.GeodataMode = cfg.GeodataMode
-	if cfg.KeepAliveInterval == 0 {
-		cfg.KeepAliveInterval = 30
+	if cfg.KeepAliveInterval != 0 {
+		N.KeepAliveInterval = time.Duration(cfg.KeepAliveInterval) * time.Second
 	}
-	N.KeepAliveInterval = time.Duration(cfg.KeepAliveInterval) * time.Second
-	log.Infoln("Keep Alive Interval set %+v", N.KeepAliveInterval)
+
+	log.Debugln("TCP Keep Alive Interval set %+v", N.KeepAliveInterval)
 	// checkout externalUI exist
 	if externalUI != "" {
 		externalUI = C.Path.Resolve(externalUI)
diff --git a/docs/config.yaml b/docs/config.yaml
index ca33911ea..cd540311d 100644
--- a/docs/config.yaml
+++ b/docs/config.yaml
@@ -50,7 +50,8 @@ external-ui: /path/to/ui/folder # 配置 WEB UI 目录，使用 http://{{externa
 # Utls is currently support TLS transport in TCP/grpc/WS/HTTP for VLESS/Vmess and trojan.
 global-client-fingerprint: chrome
 
-keep-alive-interval: 30
+#  TCP keep alive interval
+keep-alive-interval: 15
 
 # routing-mark:6666 # 配置 fwmark 仅用于 Linux
 experimental: