修正部分TCP处理流程中FD所有权转移有误，导致的fd潜在的double-free。

script/service/tfe-env.service

@@ -1,5 +1,7 @@
 [Unit]
 Description=Tango Frontend Engine - Running Environment Setup
+Before=tfe.service
+Wants=network-online.target
 
 [Service]
 EnvironmentFile=/etc/sysconfig/tfe-env-config
@@ -10,7 +12,7 @@ RemainAfterExit=yes
 ExecStart=/bin/true
 ExecStop=/bin/true
 
-# dataincoming interface
+ExecStartPost=/usr/sbin/modprobe tfe-kmod
 ExecStartPost=/usr/sbin/ip link set ${TFE_DEVICE_DATA_INCOMING} address ${TFE_LOCAL_MAC_DATA_INCOMING}
 ExecStartPost=/usr/sbin/ip link set ${TFE_DEVICE_DATA_INCOMING} up
 ExecStartPost=/usr/sbin/ip addr flush dev ${TFE_DEVICE_DATA_INCOMING}
@@ -41,6 +43,8 @@ ExecStopPost=/usr/sbin/ip -6 route del default via fd00::01
 ExecStopPost=/usr/sbin/ip -6 route del local default dev lo table 102
 ExecStopPost=/usr/sbin/ip addr del fd00::02/64 dev ${TFE_DEVICE_DATA_INCOMING}
 ExecStopPost=/usr/sbin/ip link set ${TFE_DEVICE_DATA_INCOMING} down
+ExecStopPost=/usr/sbin/modprobe -r tfe-kmod
 
 [Install]
+RequiredBy=tfe.service
 WantedBy=multi-user.target

script/service/tfe.service

@@ -0,0 +1,20 @@
+[Unit]
+Description=Tango Frontend Engine
+Requires=tfe-env.service
+After=tfe-env.service
+
+[Service]
+Type=simple
+ExecStart=/opt/tsg/tfe/bin/tfe
+TimeoutSec=180s
+RestartSec=10s
+Restart=always
+LimitNOFILE=infinity
+LimitNPROC=infinity
+LimitCORE=infinity
+TasksMax=infinity
+Delegate=yes
+KillMode=process
+
+[Install]
+WantedBy=multi-user.target