如何通过C语言获取主机WLAN下的IPv4地址,MAC地址,局域网网关IPv4地址

  1 #include "stdio.h" 
  2 #include "windows.h"
  3 
  4 void GetHostWLAN_IPv4_AND_MAC(char IPv4[], char MAC[],char GateWay[]); //获取WLAN下的IPv4和MAC地址,局域网网关IPv4地址(基于win10中文版编写)
  5 
  6 int main()
  7 {
  8     char IPv4[16] = { 0 };
  9     char MAC[18] = { 0 };
 10     char Gway[16] = { 0 };
 11     GetHostWLAN_IPv4_AND_MAC(IPv4,MAC,Gway);
 12     printf("%s %d\n", Gway,strlen(Gway));
 13     printf("%s %d\n", IPv4, strlen(IPv4));
 14     printf("%s %d\n", MAC, strlen(MAC));
 15     return 0;
 16 }
 17 
 18 void GetHostWLAN_IPv4_AND_MAC(char IPv4[],char MAC[],char GateWay[])
 19 {
 20     memset(IPv4, 0, sizeof(IPv4));
 21     memset(MAC, 0, sizeof(MAC));
 22     system("ipconfig/all > E:\\ipconfig.txt");
 23     FILE *fp = fopen("E:\\ipconfig.txt", "r");
 24     if (!fp)
 25     {
 26         printf("failed to open file!");
 27         exit(-1);
 28     }
 29     char strInfo[128] = { 0 };
 30     bool find_wlan = false;
 31     bool find_mac = false;
 32     bool find_ipv4 = false;
 33     bool find_gateway = false;
 34     int i, pos;
 35     while (fgets(strInfo, 128, fp) != NULL)
 36     {
 37         if (strstr(strInfo, "WLAN") != NULL)
 38             find_wlan = true;
 39 
 40         if (find_wlan)
 41         {
 42             if (strstr(strInfo, "物理地址") != NULL) //获取MAC地址
 43             {
 44                 pos = 16;
 45                 for (i = strlen(strInfo);; i--)
 46                 {
 47                     if (strInfo[i - 2] != '\0'&&pos >= 0)
 48                     {
 49                         if (strInfo[i - 2] != '-')
 50                             MAC[pos--] = strInfo[i - 2];
 51                         else
 52                             MAC[pos--] = ':';
 53                     }
 54                     else
 55                     {
 56                         find_mac = true;
 57                         break;
 58                     }
 59                 }
 60             }
 61 
 62             if (strstr(strInfo, "IPv4") != NULL) //获取IPv4地址
 63             {
 64                 for (i = 10;; i++)
 65                 {
 66                     if (strInfo[i] == ':')
 67                         break;
 68                 }
 69                 pos = i+2;
 70                 for (i=0;; i++,pos++)
 71                 {
 72                     if (strInfo[pos] != '\0'&&strInfo[pos] != '(')
 73                         IPv4[i] = strInfo[pos];
 74                     else
 75                     {
 76                         find_ipv4 = true;
 77                         break;
 78                     }
 79                 }
 80             }
 81 
 82             if (strstr(strInfo, "默认网关") != NULL) //获取默认网关IPv4地址
 83             {
 84                 memset(strInfo, 0, 128);
 85                 fgets(strInfo, 128, fp); //获取下一行
 86                 for (i = 0,pos = 0;; pos++)
 87                 {
 88                     if (strInfo[pos] == '\n')
 89                     {
 90                         find_gateway = true;
 91                         break;
 92                     }
 93                     if (strInfo[pos]>='0'&&strInfo[pos]<='9' || strInfo[pos]=='.')
 94                         GateWay[i++] = strInfo[pos];
 95                 }
 96             }
 97 
 98         }
 99         if (find_mac && find_ipv4 && find_gateway)
100             break;
101         memset(strInfo, 0, 128);
102     }
103 }