Linux下獲取本機局域網IP

Linux下獲取本機局域網IP

[cpp]

1. #include <stdio.h>
2. #include <stdlib.h>
3. #include <string.h>
4. #include <arpa/inet.h>
5. #include <sys/socket.h>
6. #include <sys/ioctl.h>
7. #include <net/if.h>
9. int main()
10. {
11. int inet_sock;
12. struct ifreq ifr;
13. char ip[32];
15. inet_sock = socket(AF_INET, SOCK_DGRAM, 0);
16. strcpy(ifr.ifr_name, "eth0");
17. ioctl(inet_sock, SIOCGIFADDR, &ifr);
18. strcpy(ip, inet_ntoa(((struct sockaddr_in *)&ifr.ifr_addr)->sin_addr));
19. printf("ip = %s\n", ip);
20. return 0;
21. }

1. [[email protected] getIP]# make
2. gcc -c -o getIP.o getIP.c
3. gcc getIP.o -o main
4. [[email protected] getIP]# ./main
5. ip = 192.168.1.123
6. [[email protected] getIP]#