1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Copyright (c) 2022 Huawei Device Co., Ltd. 4 * 5 * Description: check NewIP enable. 6 * 7 * Author: Yang Yanjun <yangyanjun@huawei.com> 8 * 9 * Data: 2022-09-06 10 */ 11 #include <stdlib.h> 12 #include <string.h> 13 #include <stdio.h> 14 #include <unistd.h> 15 16 #define NIP_DISABLE_PATH ("/sys/module/newip/parameters/disable") 17 #define NIP_DISABLE_LENTH (5) 18 #define NIP_ENABLE_INVALID (0xFF) 19 20 int g_nip_enable = NIP_ENABLE_INVALID; 21 _check_nip_enable(void)22static void _check_nip_enable(void) 23 { 24 char tmp[NIP_DISABLE_LENTH]; 25 FILE *fn = fopen(NIP_DISABLE_PATH, "r"); 26 27 if (!fn) { 28 printf("fail to open %s\n\n", NIP_DISABLE_PATH); 29 return; 30 } 31 32 if (fgets(tmp, NIP_DISABLE_LENTH, fn) == NULL) { 33 printf("fail to gets %s\n\n", NIP_DISABLE_PATH); 34 fclose(fn); 35 return; 36 } 37 38 if (fclose(fn) == EOF) { 39 printf("fclose failed\n"); 40 return; 41 } 42 g_nip_enable = atoi(tmp) ? 0 : 1; 43 } 44 check_nip_enable(void)45static int check_nip_enable(void) 46 { 47 if (g_nip_enable == NIP_ENABLE_INVALID) { 48 _check_nip_enable(); 49 g_nip_enable = (g_nip_enable == 1 ? 1 : 0); 50 } 51 52 return g_nip_enable; 53 } 54 main(int argc,char ** argv)55int main(int argc, char **argv) 56 { 57 int af_ninet = check_nip_enable(); 58 59 if (af_ninet) 60 printf("Support NewIP\n\n"); 61 else 62 printf("Not support NewIP\n\n"); 63 return 0; 64 } 65 66