Network - Socket - Get Local IP Address

Sample Source - Get Ip Address

char   szIpBuffer[30];

struct ifreq       ifr; struct sockaddr_in *sin = (struct sockaddr_in *)&ifr.ifr_addr; int    sfd; printf("[ %s ] Start Get IP interface eth0\n", __FUNCTION__); memset(&ifr, 0, sizeof(struct ifreq)); memset(szIpBuffer, 0x00, sizeof(szIpBuffer)); strcpy(ifr.ifr_name, "eth0"); sin->sin_family = AF_INET; if (0 > (sfd = socket(AF_INET, SOCK_STREAM, 0))) { printf("socket()...error\n"); return; } if (0==ioctl(sfd, SIOCGIFADDR, &ifr)) { strcpy(szIpBuffer, inet_ntoa(sin->sin_addr)); printf("[%s] IP is %s\n", __FUNCTION__, szIpBuffer); } else printf("[%s] Error: Get eth0 Ip Address \n", __FUNCTION__); close(sfd);