增加mtu的配置参数

server/base/cfg.go

@@ -66,6 +66,7 @@ type ServerConfig struct {
 	CstpDpd         int    `json:"cstp_dpd"`       // Dead peer detection in seconds
 	MobileKeepalive int    `json:"mobile_keepalive"`
 	MobileDpd       int    `json:"mobile_dpd"`
+	Mtu             int    `json:"mtu"`
 
 	SessionTimeout int `json:"session_timeout"` // in seconds
 	// AuthTimeout    int `json:"auth_timeout"`    // in seconds

server/base/config.go

@@ -54,6 +54,7 @@ var configs = []config{
 	{Typ: cfgInt, Name: "cstp_dpd", Usage: "死链接检测时间(秒)", ValInt: 30},
 	{Typ: cfgInt, Name: "mobile_keepalive", Usage: "移动端keepalive接检测时间(秒)", ValInt: 50},
 	{Typ: cfgInt, Name: "mobile_dpd", Usage: "移动端死链接检测时间(秒)", ValInt: 60},
+	{Typ: cfgInt, Name: "mtu", Usage: "最大传输单元MTU", ValInt: 1460},
 	{Typ: cfgInt, Name: "session_timeout", Usage: "session过期时间(秒)", ValInt: 3600},
 	// {Typ: cfgInt, Name: "auth_timeout", Usage: "auth_timeout", ValInt: 0},
 	{Typ: cfgInt, Name: "audit_interval", Usage: "审计去重间隔(秒),-1关闭", ValInt: -1},

server/conf/server-sample.toml

@@ -60,6 +60,10 @@ cstp_keepalive = 20
 cstp_dpd = 30
 mobile_keepalive = 40
 mobile_dpd = 50
+
+#设置最大传输单元
+mtu = 1460
+
 #session过期时间，用于断线重连，0永不过期
 session_timeout = 3600
 auth_timeout = 0

server/sessdata/session.go

@@ -294,9 +294,12 @@ func (cs *ConnSession) ratePeriod() {
 	}
 }
 
-const MaxMtu = 1460
+var MaxMtu = 1460
 
 func (cs *ConnSession) SetMtu(mtu string) {
+	if base.Cfg.Mtu > 0 {
+		MaxMtu = base.Cfg.Mtu
+	}
 	cs.Mtu = MaxMtu
 
 	mi, err := strconv.Atoi(mtu)