Socket Client和Server在自己电脑上都能连接成功，但换成两台电脑就连不上了：
server:
#define _WINSOCK_DEPRECATED_NO_WARNINGS
#include <WinSock2.h>
#include <Windows.h>
#include <list>
#include <thread>
#include<string>
#include <iostream>
#pragma comment(lib,"ws2_32")
using namespace std;
int main()
{
WSADATA data;
int ret = WSAStartup(MAKEWORD(2, 2), &data);
if (ret)
{
cout << "初始化网络错误！" << endl;
WSACleanup();
return -1;
}
SOCKET sockSev = socket(AF_INET, SOCK_STREAM, 0);
if (sockSev == -1)
{
cout << "创建套接字失败！";
WSACleanup();
return -1;
}
sockaddr_in addrSev;
addrSev.sin_family = AF_INET;
addrSev.sin_port = htons(9999);
addrSev.sin_addr.S_un.S_addr = htonl(INADDR_ANY);
ret = bind(sockSev, (sockaddr*)&addrSev, sizeof(addrSev));
if (ret == -1)
{
cout << "绑定地址端口失败！";
WSACleanup();
return -1;
}
ret = listen(sockSev, 5);
if (ret == -1)
{
cout << "监听套接字失败！";
WSACleanup();
return -1;
}
list<SOCKET> listSock;
while (true)
{
cout << "等待用户连接" << endl;
sockaddr_in addrCli;
char buf[0xFF]="连接服务器成功！";
char kind[0xFF] = "0";
int len = sizeof(addrCli);
SOCKET sockCli = accept(sockSev, (sockaddr*)&addrCli, &len);
if (sockCli == INVALID_SOCKET)
{
cout << inet_ntoa(addrCli.sin_addr) << "连接失败！" << endl;
closesocket(sockCli);
break;
}
else
{
cout << "检测到：socket：" << sockCli << "ip：" << inet_ntoa(addrCli.sin_addr) << endl;
listSock.push_back(sockCli);
int rett = send(sockCli, kind, 0xFF, 0);
ret = send(sockCli, buf, 0xFF, 0);
if (ret == -1||rett==-1)
{
cout << "连接失败" << endl;
break;
}
thread t([&listSock]()
{
char tkind[0xFF]="1";
string name;
int ret;
char buf[0xFF];
SOCKET sockCli = listSock.back();
auto begin = listSock.begin();
auto end = listSock.end();
ret = recv(sockCli, buf, 0xFF, 0);
if (ret <= 0) return;
name = buf;
string infor = name+" 进入了服务器";
for (; begin != end; begin++)
{
if (*begin != sockCli)
{
int rett= send(*begin, tkind , sizeof(buf), 0);
ret = send(*begin, infor.data(), sizeof(buf), 0);
if (ret == -1||rett==-1)
{
cout << "发送信息失败！" << endl;
break;
}
}
}
while (true)
{
begin = listSock.begin();
end = listSock.end();
char buf[0xFF];
ret = recv(sockCli, buf, 0xFF, 0);
if (ret <=0)
{
//cout << "接收客户端数据失败！"<<endl;
break;
}
cout << "socket:" << sockCli << ":" << buf << endl;
string b = "：";
string msg = name + b + buf;
for (; begin != end; begin++)
{
if (*begin != sockCli)
{
char kind[0xFF] = "0";
int rett = send(*begin, kind, sizeof(buf), 0);
ret = send(*begin,msg.data(), sizeof(buf), 0);
if (ret == -1||rett==-1)
{
cout << "发送信息失败！" << endl;
break;
}
}
}
}
closesocket(sockCli);
listSock.remove(sockCli);
cout << "有人离开了服务器" << endl;
});
t.detach();
//system("pause");
}
}
closesocket(sockSev);
WSACleanup();
system("pause");
return 0;
}
client:
#define _WINSOCK_DEPRECATED_NO_WARNINGS
#include <WinSock2.h>
#include <thread>
#include <list>
#include <fstream>
#include <conio.h>
#include <Windows.h>
#include <string>
#include <mutex>
#include <iostream>
#pragma comment(lib,"ws2_32")
using namespace std;
std::mutex mut;
int mssg;
int member = 0;
list<string> listname;
int ok = false;
void gotoxy(short x, short y)//用于移动光标，更改其位置
{
COORD coord = { x, y };
SetConsoleCursorPosition(GetStdHandle(STD_OUTPUT_HANDLE), coord);
}
void Draw()
{
for (int i = 0; i < 32; i++)
{
gotoxy(80, i); cout << "■";
}
gotoxy(82, 0); cout << "当前在线人数：" << member;
auto begin = listname.begin();
auto end = listname.end();
for (int i=0; begin!=end; begin++,i++)
{
gotoxy(82, i + 1);
cout << *begin;
}
gotoxy(0, 30);
}
int main()
{
mssg = 0;
HANDLE hStdin = GetStdHandle(STD_INPUT_HANDLE);
DWORD mode;
GetConsoleMode(hStdin, &mode);
mode &= ~ENABLE_QUICK_EDIT_MODE;
SetConsoleMode(hStdin, mode);//取消快速编辑
system("mode con cols=116 lines=32");
Draw();
string name;
WSADATA data;
int ret = WSAStartup(MAKEWORD(2, 2), &data);
if (ret)
{
cout << "初始化网络错误！" << endl;
WSACleanup();
return -1;
}
fstream fp;
fp.open("./name.txt", ios::in);
if (fp.is_open() == false)
{
cout << "初次登录，请输入昵称：" << endl;
fp.open("./name.txt", ios::out|ios::app);
cin >> name;
fp << name;
fp.close();
}//没登过就先输昵称
else
{
getline(fp, name);
fp.close();//从文件中提取昵称
}
SOCKET sock = socket(AF_INET, SOCK_STREAM, 0);
sockaddr_in addr;
addr.sin_family = AF_INET;
addr.sin_port = htons(9999);
addr.sin_addr.S_un.S_addr = inet_addr("10.69.121.32");
ret = connect(sock, (sockaddr*)&addr, sizeof(addr));
if (ret == -1)
{
cout << "连接服务器失败！" << endl;
WSACleanup();
int err=WSAGetLastError();
cout << err << endl;
system("pause");
return -1;
}
gotoxy(0, mssg);
cout << "欢迎：" << name;
mssg++;
//cout << "服务器连接成功" << endl;
thread t([&sock]()
{
while (true)
{
char buf[0xFF];
char kind[0xFF];
int rett = recv(sock, kind, 0xFF, 0);
int ret = recv(sock, buf, 0xFF, 0);
if (ret <= 0||rett<=0)
{
cout << "服务器已断联"<<endl;
break;
}
gotoxy(0, mssg);
string tkind = kind;
cout <<tkind<<"-"<< buf << endl;
mssg++;//接收服务器信息
if (mssg > 30)
{
system("cls"); Draw();
mssg = 0;
}
if (tkind == "1")
{
member++;
gotoxy(82, 0); cout << "当前在线人数：" << member;
string men = buf;
size_t p=men.find(" ");
string tname = men.substr(0, p);
listname.push_back(tname);
gotoxy(82, member); cout << tname;
}
gotoxy(0, 30);
}
});
t.detach();
ret = send(sock, name.data(), sizeof(name), 0);
if (ret == -1)
{
cout << "昵称上传出错" << endl;
WSACleanup();
return -1;
}
member++;
listname.push_back(name);
gotoxy(82, 0); cout << "当前在线人数：" << member;
gotoxy(82, member); cout << name;
ok = true;
string msg;
while (true)
{
cin >> msg;
ok = true;
ret = send(sock, msg.data(), sizeof(msg), 0);
if (ret == -1)
{
cout << "发送服务器数据失败！" << endl;
break;
}
gotoxy(0, mssg); cout << msg;
gotoxy(0, 30);
for (int i = 0; i < 80; i++) cout << " ";
gotoxy(0, 30);
mssg++;
if (mssg > 30)
{
system("cls"); Draw();
mssg = 0;
}
}
closesocket(sock);
WSACleanup();
}
在网上搜寻了好久依旧没有头绪，求解答，非常感谢！
