如何升级cocos2d-x来支持ipv6以及socket怎么支持ipv6

儿童节后苹果只爱IPv6 Cocos2d-x第一时间支持
http://sanwen8.cn/p/17dTB0M.html

这里只说了更新CURL和libwebsocket网络

以下是两种更新方法，小伙伴可以选择自己喜欢的方式：

一、通过download-deps.py更新

1.修改cocos2dx_root/external/config.json 来更新第三方库

v3.x用户修改version字段为 v3-deps-94

v2.x用户修改version 字段为 v2-deps-7

2.运行 download-deps.py 脚本更新第三方库

二、通过github页面下载

v3-deps-94：
https://github.com/cocos2d/cocos2d-x-3rd-party-libs-bin/releases/tag/v3-deps-94
v2-deps-7：
https://github.com/cocos2d/cocos2d-x-3rd-party-libs-bin/releases/tag/v2-deps-6
对于Cocos2d-x v2.x的用户，同时还需要修改WebSocket.h和WebSocket.cpp这两个文件以适应新的libwebsocket库，具体参考如下：
https://github.com/cocos2d/cocos2d-x/pull/15666
最后还要告诉大家一个好消息：Cocos2d-x 3.11.1以后的版本将自动支持IPv6，小伙伴们无需升级哦。

那么如果游戏中用的是原生socket该怎么办呢，

值得庆幸的是socket本身是支持ipv6的，网上有方法说将对应的ipv4的改为ipv6的接口如（sockaddr_in 改为sockaddr_in6）等等，方法很多这里不列举了

可我用的不是这种，我是通过域名的方式去做，不管你ipv4还是ipv6都是完美支持的

客户端通过getaddrinfo解析域名，记得freeaddrinfo释放空间

服务器不用做任何修改

废话少说贴代码要紧

下面代码传入ip或者域名，端口

返回socket的句柄

int tcp_connect(const char* ip, int port)
{

char strIP[100];
sprintf(strIP,"%s",ip);

char strPort[100];
sprintf(strPort,"%d",port);

struct addrinfo *ailist, *aip;
struct addrinfo hint;
struct sockaddr_in *sinp;
int sockfd;
int err;
char seraddr[INET_ADDRSTRLEN];
short serport;

hint.ai_family = 0;
hint.ai_socktype = SOCK_STREAM;
hint.ai_flags = AI_CANONNAME;
hint.ai_protocol = 0;
hint.ai_addrlen = 0;
hint.ai_addr = NULL;
hint.ai_canonname = NULL;
hint.ai_next = NULL;
if ((err = getaddrinfo(strIP, strPort, &hint, &ailist)) != 0) {
printf("getaddrinfo error: %s\n", gai_strerror(err));
return -1;
}
bool isConnectOk = false;
printf("getaddrinfo ok\n");
for (aip = ailist; aip != NULL; aip = aip->ai_next) {

sinp = (struct sockaddr_in *)aip->ai_addr;
if (inet_ntop(sinp->sin_family, &sinp->sin_addr, seraddr, INET_ADDRSTRLEN) != NULL)
{
printf("server address is %s\n", seraddr);
}
serport = ntohs(sinp->sin_port);
printf("server port is %d\n", serport);
if ((sockfd = socket(aip->ai_family, SOCK_STREAM, 0)) < 0) {
printf("create socket failed: %s\n", strerror(errno));
isConnectOk = false;
continue;
}
printf("create socket ok\n");
if (connect(sockfd, aip->ai_addr, aip->ai_addrlen) < 0) {

printf("can't connect to %s: %s\n", strIP, strerror(errno));
isConnectOk = false;
continue;
}
isConnectOk = true;

break;
}
freeaddrinfo(ailist);

if (isConnectOk) {
return sockfd;
}
return -1;

}

-------------------------------------------------------------------------

2016-11-15 更新

既然有人问 connect_nonb，那边下面是对应的 connect_nonb 代码

int connect_nonb(int sockfd, const struct sockaddr *saptr, socklen_t salen, int nsec)
{
int flags, n, error;
socklen_t len;
fd_set rset, wset;
struct timeval tval;

flags = fcntl(sockfd, F_GETFL, 0);
fcntl(sockfd, F_SETFL, flags | O_NONBLOCK);

error = 0;
if ((n = connect(sockfd, (struct sockaddr *) saptr, salen)) < 0) {
if (errno != EINPROGRESS) {
goto done;
}
}
/* Do whatever we want while the connect is taking place. */
if (n == 0)
goto done; /* connect completed immediately */

FD_ZERO(&rset);
FD_SET(sockfd, &rset);
wset = rset;
tval.tv_sec = nsec;
tval.tv_usec = 0;

if ( (n = select(sockfd+1, &rset, &wset, NULL,
nsec ? &tval : NULL)) == 0) {
close(sockfd); /* timeout */
errno = ETIMEDOUT;
goto done;
}

if (FD_ISSET(sockfd, &rset) || FD_ISSET(sockfd, &wset)) {
len = sizeof(error);
if (getsockopt(sockfd, SOL_SOCKET, SO_ERROR, &error, &len) < 0) {
goto done; /* Solaris pending error */
}
} else
cout << "Unable to do select because of " << strerror(errno) << endl;

done:
fcntl(sockfd, F_SETFL, flags); /* restore file status flags */

if (error) {
close(sockfd); /* just in case */
errno = error;
return(-1);
}
return(0);
}

int tcp_connect(const char*ip, int port, int sec)
{
int ret;

char strIP[100];

sprintf(strIP,"%s",ip);

char strPort[100];
sprintf(strPort,"%d",port);

struct addrinfo *ailist, *aip;
struct addrinfo hint;
struct sockaddr_in *sinp;
int sockfd;
int err;
char seraddr[INET_ADDRSTRLEN];
short serport;

hint.ai_family = 0;
hint.ai_socktype = SOCK_STREAM;
hint.ai_flags = AI_CANONNAME;
hint.ai_protocol = 0;
hint.ai_addrlen = 0;
hint.ai_addr = NULL;
hint.ai_canonname = NULL;
hint.ai_next = NULL;
if ((err = getaddrinfo(strIP, strPort, &hint, &ailist)) != 0) {
printf("getaddrinfo error: %s\n", gai_strerror(err));
return -1;
}
bool isConnectOk = false;
printf("getaddrinfo ok\n");
for (aip = ailist; aip != NULL; aip = aip->ai_next) {

sinp = (struct sockaddr_in *)aip->ai_addr;
if (inet_ntop(sinp->sin_family, &sinp->sin_addr, seraddr, INET_ADDRSTRLEN) != NULL)
{
printf("server address is %s\n", seraddr);
}
serport = ntohs(sinp->sin_port);
printf("server port is %d\n", serport);
if ((sockfd = socket(aip->ai_family, SOCK_STREAM, 0)) < 0) {
printf("create socket failed: %s\n", strerror(errno));
isConnectOk = false;
continue;
}
printf("create socket ok\n");
if (aip->ai_addr->sa_family == AF_INET) {
ret = connect_nonb(sockfd, aip->ai_addr, sizeof(struct sockaddr_in), sec);
}else if(aip->ai_addr->sa_family == AF_INET6){
ret = connect_nonb(sockfd, aip->ai_addr, sizeof(struct sockaddr_in6), sec);
}
//        if (connect(sockfd, aip->ai_addr, aip->ai_addrlen) < 0) {
if(ret < 0){
printf("can't connect to %s: %s\n", strIP, strerror(errno));
isConnectOk = false;
continue;
}
isConnectOk = true;
//        return sockfd;
break;
}
freeaddrinfo(ailist);

if (isConnectOk) {
return sockfd;
}
return -1;

}