20180718

1、errno打印错误信息
2、发包时寻找发包网卡根据routdir方向，而非指定某个网卡是客户端

kni.h

@@ -60,11 +60,14 @@
 #define KNI_ACTION_EXIT			"exit..."
 
 //init profile info
-#define KNI_CONF_MAXLEN			256
+#define KNI_CONF_MAXLEN			1024
 #define KNI_CONF_FILENAME		"./kniconf/kni.conf"
 #define KNI_CONF_MODE			"Module"
 #define KNI_CONF_FILENAME_MAIN	"./conf/main.conf"
 
+#define KNI_OFFSET_ROUTDIR		1
+#define KNI_OFFSET_CARDNAME		3
+#define KNI_CARD_NUM			2
 
 
 
@@ -355,9 +358,10 @@ struct kni_tcp_state
 
 struct args_read_tun
 {
-	int thread_seq;
+	int thread_seq;								//in
 	int iprevers;								//in
 	int iplen;									//in
+	int routdir;								//out
 	char* a_packet;								//in
 	unsigned char smac[KNI_MACADDR_LEN];		//out
 	unsigned char dmac[KNI_MACADDR_LEN];		//ouit