Linux 获取本机IP、MAC地址用法大全

 1
 2 //#include <sys/types.h>
 3 #include <ifaddrs.h>
 4 #include <sys/ioctl.h>
 5 #include <net/if.h>
 6 #include <string.h>
 7 #include <stdio.h>
 8 #include <unistd.h>
 9 #include <netdb.h>
10 //#include <sys/socket.h>
11 //#include <netinet/in.h>
12 #include <arpa/inet.h>
13
14 char* getMac(char* mac,char* dv){
15     struct   ifreq   ifreq;
16     int   sock;
17     if(!mac || !dv)
18         return mac;
19     if((sock=socket(AF_INET,SOCK_STREAM,0)) <0)
20     {
21         perror( "socket ");
22         return mac;
23     }
24     strcpy(ifreq.ifr_name,dv);
25     if(ioctl(sock,SIOCGIFHWADDR,&ifreq) <0)
26     {
27         perror( "ioctl ");
28         return mac;
29     } close(sock);
30     sprintf(mac, "%02x:%02x:%02x:%02x:%02x:%02x",
31            (unsigned char)ifreq.ifr_hwaddr.sa_data[0],
32            (unsigned char)ifreq.ifr_hwaddr.sa_data[1],
33            (unsigned char)ifreq.ifr_hwaddr.sa_data[2],
34            (unsigned char)ifreq.ifr_hwaddr.sa_data[3],
35            (unsigned char)ifreq.ifr_hwaddr.sa_data[4],
36            (unsigned char)ifreq.ifr_hwaddr.sa_data[5]);
37     return mac;
38 }
39
40 int main (int argc, const char * argv[])
41 {
42     char hname[128];
43     struct hostent *hent;
44     int i;
45
46     gethostname(hname, sizeof(hname));
47
48     //hent = gethostent();
49     hent = gethostbyname(hname);
50
51     printf("hostname: %s\n", hent->h_name);
52
53 //----------------------------------------------------------
54     printf("\n\n\n");
55
56     char mac[30];
57     struct ifaddrs * ifAddrStruct=NULL;
58     void * tmpAddrPtr=NULL;
59
60     getifaddrs(&ifAddrStruct);
61
62     while (ifAddrStruct!=NULL) {
63         if (ifAddrStruct->ifa_addr->sa_family==AF_INET) { // check it is IP4
64             // is a valid IP4 Address
65             tmpAddrPtr=&((struct sockaddr_in *)ifAddrStruct->ifa_addr)->sin_addr;
66             char addressBuffer[INET_ADDRSTRLEN];
67             inet_ntop(AF_INET, tmpAddrPtr, addressBuffer, INET_ADDRSTRLEN);
68             printf("%s IP: %s\n", ifAddrStruct->ifa_name, addressBuffer);
69             printf("MAC: %s\n\n",getMac(mac,ifAddrStruct->ifa_name));
70         } else if (ifAddrStruct->ifa_addr->sa_family==AF_INET6) { // check it is IP6
71             // is a valid IP6 Address
72             tmpAddrPtr=&((struct sockaddr_in *)ifAddrStruct->ifa_addr)->sin_addr;
73             char addressBuffer[INET6_ADDRSTRLEN];
74             inet_ntop(AF_INET6, tmpAddrPtr, addressBuffer, INET6_ADDRSTRLEN);
75             printf("%s IP: %s\n", ifAddrStruct->ifa_name, addressBuffer);
76             printf("MAC: %s\n\n",getMac(mac,ifAddrStruct->ifa_name));
77         }
78         ifAddrStruct=ifAddrStruct->ifa_next;
79     }
80     return 0;
81
82 } 

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