diff --git a/LICENSE b/LICENSE
index c639838f9ae0356f5728dd364b6494650b0020f3..2fa9023d54b04efddf441c0d30dc5f7ac8adcb04 100644
--- a/LICENSE
+++ b/LICENSE
@@ -4,6 +4,7 @@ Copyright (c) 2022 Huawei Device Co., Ltd. All rights reserved.
 The code/linux/ subdirectorie is licensed under the GPL V2 License.
 The code/ommon/ subdirectorie is licensed under 3-Clause BSD License.
 The examples/ subdirectorie is licensed under 3-Clause BSD License.
+The tools/ subdirectorie is licensed under the GPL V2 License.
 
 a) GNU General Public License version 2, (https://opensource.org/licenses/GPL-2.0)
 This library is free software; you can redistribute it and/or
diff --git a/examples/check_nip_enable.c b/examples/check_nip_enable.c
index 3f96b3054a0c057fe80fe5cd969f85c4516289df..88bf42197b054e64b9532e2ba2549b790e43ee2c 100644
--- a/examples/check_nip_enable.c
+++ b/examples/check_nip_enable.c
@@ -62,8 +62,10 @@ void _check_nip_enable(void)
 
 int check_nip_enable(void)
 {
-	if (g_nip_enable == NIP_ENABLE_INVALID)
+	if (g_nip_enable == NIP_ENABLE_INVALID) {
 		_check_nip_enable();
+		g_nip_enable = (g_nip_enable == 1 ? 1 : 0);
+	}
 
 	return g_nip_enable;
 }
@@ -72,7 +74,10 @@ int main(int argc, char **argv)
 {
 	int af_ninet = check_nip_enable();
 
-	printf("nip_enable=%d\n\n", g_nip_enable);
+	if (g_nip_enable)
+		printf("Support NewIP.\n\n");
+	else
+		printf("Not support NewIP.\n\n");
 	return 0;
 }
 
diff --git a/examples/nip_lib.c b/examples/nip_lib.c
index 8699228c4183761995e1ce8b9206ceea040979bb..5c84643611d1421f8ce7a4824cfd403d196c08b7 100644
--- a/examples/nip_lib.c
+++ b/examples/nip_lib.c
@@ -67,31 +67,33 @@ int32_t nip_get_ifindex(const char *ifname, int *ifindex)
 	return 0;
 }
 
-int nip_addr_fmt(char *addr, struct nip_addr *sap, int addrlen_input)
+int nip_addr_fmt(char *addr_str, struct nip_addr *sap, int addrlen_input)
 {
 	unsigned char first_byte;
 	int addrlen, i;
 
 	memset(sap, 0, sizeof(struct nip_addr));
 	for (i = 0; i < INDEX_MAX; i++) {
+		if (addr_str[i] == 0)
+			break;
+
 		/* 0 ~ 9 = 48 ~ 57,  '0'构造成 0  = 48 - 48 */
-		if (addr[i] >= '0' && addr[i] <= '9')
-			addr[i] = addr[i] - '0';
+		if (addr_str[i] >= '0' && addr_str[i] <= '9') {
+			addr_str[i] = addr_str[i] - '0';
 		/* A ~ F = 65 ~ 70,  'A'构造成 10 = 65 - 55 */
-		else if (addr[i] >= 'A' && addr[i] <= 'F')
-			addr[i] = addr[i] - STR_FMT_1;
+		} else if (addr_str[i] >= 'A' && addr_str[i] <= 'F') {
+			addr_str[i] = addr_str[i] - STR_FMT_1;
 		/* a ~ f = 97 ~ 102, 'a'构造成 10 = 97 - 87 */
-		else if (addr[i] >= 'a' && addr[i] <= 'f')
-			addr[i] = addr[i] - STR_FMT_2;
-		else if (addr[i] == 0)
-			break;
-
-		printf("Newip addr error: uaddr[%u]=%c.\n", i, addr[i]);
-		return 1;
+		} else if (addr_str[i] >= 'a' && addr_str[i] <= 'f') {
+			addr_str[i] = addr_str[i] - STR_FMT_2;
+		} else {
+			printf("Newip addr error: uaddr[%u]=%c.\n", i, addr_str[i]);
+			return 1;
+		}
 	}
 
-	first_byte = addr[0] << NIP_ADDR_LEN_4;
-	first_byte += addr[1];
+	first_byte = addr_str[0] << NIP_ADDR_LEN_4;
+	first_byte += addr_str[1];
 	if (first_byte >= 0x00 && first_byte <= ADDR_FIRST_DC)
 		addrlen = NIP_ADDR_LEN_1;
 	else if ((first_byte > ADDR_FIRST_DC && first_byte <= ADDR_FIRST_F0) ||
@@ -117,8 +119,8 @@ int nip_addr_fmt(char *addr, struct nip_addr *sap, int addrlen_input)
 	printf("*************************************************\n");
 	printf("Newip addr len=%u\n", addrlen);
 	for (i = 0; i < addrlen; i++) {
-		sap->nip_addr_field8[i] = addr[i * INDEX_2] << INDEX_4;
-		sap->nip_addr_field8[i] += addr[i * INDEX_2 + 1];
+		sap->nip_addr_field8[i] = addr_str[i * INDEX_2] << INDEX_4;
+		sap->nip_addr_field8[i] += addr_str[i * INDEX_2 + 1];
 		printf("%02x ", sap->nip_addr_field8[i]);
 	}
 	printf("\n*************************************************\n\n");
@@ -131,7 +133,7 @@ int nip_get_addr(char **args, struct nip_addr *addr)
 	int ret;
 	char *sp = *args;
 	int addrlen_input = 0;
-	__u8 addr[INDEX_MAX] = {0};
+	__u8 addr_str[INDEX_MAX] = {0};
 
 	while (*sp != '\0') {
 		addrlen_input += 1;
@@ -143,7 +145,7 @@ int nip_get_addr(char **args, struct nip_addr *addr)
 		return -1;
 	}
 
-	ret = sscanf(*args, "%s", addr);
-	return nip_addr_fmt(addr, addr, addrlen_input / ADDR_STR_LEN);
+	ret = sscanf(*args, "%s", addr_str);
+	return nip_addr_fmt(addr_str, addr, addrlen_input / ADDR_STR_LEN);
 }