1、简要

从前用的网络编程函数现在又做了一定的改动，报了这么3个错误。

error C4996: ‘inet_ntoa‘: Use inet_ntop() or InetNtop() instead or define _WINSOCK_DEPRECATED_NO_WARNINGS to disable deprecated API warningserror C4996: ‘gethostbyaddr‘: Use getnameinfo() or GetNameInfoW() instead or define _WINSOCK_DEPRECATED_NO_WARNINGS to disable deprecated API warningserror C4996: ‘inet_ntoa‘: Use inet_ntop() or InetNtop() instead or define _WINSOCK_DEPRECATED_NO_WARNINGS to disable deprecated API warnings

2、解决方法1

右键属性-属性页选择【C/C++】->【常规】->【SDL检查】 选择为否。

3、代码解决

既然已经明确提示需要换更安全的函数，那就按照要求来就好了。

serverAddr.sin_addr.S_un.S_addr = inet_addr("127.0.0.1");//自己的IP或者127.0.0.1

改为：

//新改进代码InetPton(AF_INET, _T("127.0.0.1"), &serverAddr.sin_addr.s_addr);

gethostbyaddr()改用getnameinfo()；

inet_ntop()改用getaddrinfo();

修改后的代码：

#include "stdafx.h"#include <WinSock2.h>#pragma comment(lib,"ws2_32.lib")#include <Ws2tcpip.h>/*1. 初始化环境 ???????wsastartup2. 创建套接字 ???????socket3. 绑定套接字 ???????bind4. 监听套接字 ???????listen5. 处理套接字连接 ?????accept6. 发送接收数据 ??????send/recv7. 关闭套接字 ???????closesocket8. 清理环境 ????????wsacleanup*/int main(){ ???// 1. 初始化环境 ????wsastartup ???WSADATA wsd = { 0 }; ???int re = WSAStartup(MAKEWORD(2, 2), &wsd); ???if (re != 0) { return 0; } ???if (LOBYTE(wsd.wVersion) != 2 || ???????HIBYTE(wsd.wVersion) != 2) ???{ ???????return 0; ???} ???// 2. 创建套接字 ????socket ???SOCKET listenSock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP); ???if (listenSock == INVALID_SOCKET) ???{ ???????return 0; ???} ???// 3. 绑定套接字 ????bind ???sockaddr_in serverAddr; ???serverAddr.sin_family = AF_INET; ???serverAddr.sin_port = htons(0x5566); ???????//旧代码 ???//serverAddr.sin_addr.S_un.S_addr = inet_addr("127.0.0.1");//自己的IP或者127.0.0.1 ???//新改进代码 ???InetPton(AF_INET, _T("127.0.0.1"), &serverAddr.sin_addr.s_addr); ???re = bind(listenSock, (sockaddr *)&serverAddr, sizeof(serverAddr)); ???// 4. 监听套接字 ????listen ???re = listen(listenSock, SOMAXCONN); ???// 5. 处理套接字连接 ??accept ???sockaddr_in clientAddr; ???int size = sizeof(clientAddr); ???SOCKET sToClientSock = accept( ???????listenSock, (sockaddr *)&clientAddr, &size); ???//测试获取的结果 ???//更换为新函数查看使用结果 ???//旧 主机名 ???hostent * pHost = gethostbyaddr((char *)&serverAddr.sin_addr, 4, AF_INET); ???//旧 ?IP地址 ???char * p = inet_ntoa(*(struct in_addr *) (*pHost->h_addr_list)); ???????//新代码测试 ???/////////////////////////////////////////////////////////////////// ???struct addrinfo *ptr = NULL; ???struct addrinfo hints; ???struct addrinfo *result = NULL; ???struct sockaddr_in ?*sockaddr_ipv4; ???char hostname[NI_MAXHOST]; //主机名称 ???char servInfo[NI_MAXSERV]; //具体连接成功的端口 ???getnameinfo((struct sockaddr *) &serverAddr, ???????sizeof(struct sockaddr), ???????hostname, ???????NI_MAXHOST, servInfo, NI_MAXSERV, NI_NUMERICSERV); ???ZeroMemory(&hints, sizeof(hints)); ???hints.ai_family = AF_UNSPEC; ???hints.ai_socktype = SOCK_STREAM; ???hints.ai_protocol = IPPROTO_TCP; ???getaddrinfo(hostname, servInfo, &hints, &result); ???for (ptr = result; ptr != NULL; ptr = ptr->ai_next) { ???????????switch (ptr->ai_family) { ???????case AF_UNSPEC: ???????????printf("Unspecified\n"); ???????????break; ???????case AF_INET: ???????????printf("AF_INET (IPv4)\n"); ???????????sockaddr_ipv4 = (struct sockaddr_in *) ptr->ai_addr; ???????????printf("\tIPv4 address %s\n", ???????????????inet_ntoa(sockaddr_ipv4->sin_addr)); ???????????break; ???????} ???????} ???/////////////////////////////////////////////////////////////////// ???// 6.1 发送数据 send ???char buf[100] = "hello socket client,from server!"; ???re = send(sToClientSock, buf, strlen(buf), 0); ???if (re == SOCKET_ERROR) ???{ ???????goto over; ???} ???// 6.2 接收数据 ?recv ???re = recv(sToClientSock, buf, sizeof(buf), 0); ???if (re == INVALID_SOCKET) ???{ ???????goto over; ???}over: ???// 7. 关闭套接字 ????closesocket ???closesocket(listenSock); ???closesocket(sToClientSock); ???// 8. 清理环境 ?????wsacleanup ???WSACleanup(); ???return 0;}