博客

char * getLocalIp() { //获取本地ip地址
	char szText[256];
	int iRet = gethostname(szText,256);//返回0成功,获取本机计算机名
	if (iRet) {
		LOG(info) << "获取本地ip失败"<<std::endl;
		return NULL;
	}
	struct addrinfo  hints,*res;
	memset(&hints, 0, sizeof(addrinfo));//初始化
	hints.ai_socktype = SOCK_STREAM;//TCP协议，SOCK_DGRAM udp
	hints.ai_family = AF_INET;//ipv4协议
	int hosttem = getaddrinfo(szText,"",&hints,&res);//0表示成功，该接口适用于ipv4和ipv6
	if (hosttem) {
		LOG(info) << "获取本地ip失败" << std::endl;
		return NULL;
	}
	
	in_addr local_ip; 
	local_ip.S_un.S_addr = ((sockaddr_in*)(res->ai_addr))->sin_addr.s_addr;
	
	char str[256];
	std::cout << "ip: " << inet_ntop(AF_INET,&(local_ip.S_un.S_addr),str,256) << std::endl;//该接口适用于ipv4和ipv6
	return str;

}