为什么connect总是失败

[smdszgzh]

//Sever

#include <Windows.h>
#include <iostream>
using namespace std;
int main()
{
	WSADATA m_data;
	sockaddr_in Sevaddr_in,Cliaddr_in;
	if(WSAStartup(MAKEWORD(2,2),&m_data)!=0)
	{
		cout<<"Init socket library failed! "<<endl;
		return -1;
	}
	SOCKET SeverSocket=socket(AF_INET,SOCK_STREAM,IPPROTO_TCP);
	SOCKET CliSocket;
	Sevaddr_in.sin_addr.S_un.S_addr=htonl(INADDR_ANY);
	Sevaddr_in.sin_family=AF_INET;
	Sevaddr_in.sin_port=htons(6000);
	if(SeverSocket==INVALID_SOCKET)
	{
		cout<<"Create socket failed!"<<endl;
	}
	int n=bind(SeverSocket,(sockaddr*)&Sevaddr_in,sizeof(Sevaddr_in));
	if(n!=0)
		cout<<"Bind failed!"<<endl;
	if(listen(SeverSocket,5)!=0)
	{
		cout<<"Listen failed!"<<endl;
	}

	
	while(true)
	{
		int length=sizeof(Cliaddr_in);
		CliSocket=accept(SeverSocket,(sockaddr*)&Cliaddr_in,&length);
		char *Sendbuff=new char[100];
		Sendbuff="";
		sprintf(Sendbuff,"%s","Welcome!");
		//cin.getline(Sendbuff,sizeof(Sendbuff));;
		char *recvbuff=new char[100];
		recvbuff="";
		send(CliSocket,Sendbuff,sizeof(Sendbuff)+1,0);
		recv(CliSocket,recvbuff,sizeof(recvbuff)+1,0);
		cout<<recvbuff<<endl;
	}
	closesocket(SeverSocket);
	WSACleanup();
	return 0;
}


//Client
#include <Windows.h>
#include <iostream>
using namespace std;
int main()
{
	WSADATA data;
	if(WSAStartup(MAKEWORD(2,2),&data)!=0)
	{
		cout<<"Init socket library failed!"<<endl;
		return -1;
	}
	sockaddr_in Sevaddr_in;
	Sevaddr_in.sin_addr.S_un.S_addr=inet_addr("127,0,0,1");
	Sevaddr_in.sin_family=AF_INET;
	Sevaddr_in.sin_port=htons(6000);
	SOCKET CliSocket=socket(AF_INET,SOCK_STREAM,IPPROTO_TCP);
	if(CliSocket==INVALID_SOCKET)
	{
		cout<<"Create socket failde!"<<endl;
	}
	int x=connect(CliSocket,(sockaddr*)&Sevaddr_in,sizeof(Sevaddr_in));
	if(x==SOCKET_ERROR)
	{
		cout<<"Connect failed!"<<endl;//这里总失败！
	}
	char *Sendbuff=new char[100];
	Sendbuff="";
	char *recvbuff=new char[100];
	recvbuff="";
	recv(CliSocket,recvbuff,sizeof(recvbuff)+1,0);
	cout<<recvbuff<<endl;
	cin.getline(Sendbuff,sizeof(Sendbuff));
	send(CliSocket,Sendbuff,sizeof(Sendbuff)+1,0);
	closesocket(CliSocket);
	WSACleanup();
	return 0;
}

[liuysheng]

//代码改成如下，就可以了
#include "stdafx.h"
#include <Windows.h>
#include <iostream.h>
#include<winsock2.h>

#pragma comment(lib,"ws2_32.lib")

//using namespace std;//要不要，都行

int main()
{
WSADATA m_data;
sockaddr_in Sevaddr_in,Cliaddr_in;
if(WSAStartup(MAKEWORD(2,2),&m_data)!=0)
{
cout<<"Init socket library failed! "<<endl;
return -1;
}
SOCKET SeverSocket=socket(AF_INET,SOCK_STREAM,IPPROTO_TCP);
SOCKET CliSocket;
Sevaddr_in.sin_addr.S_un.S_addr=htonl(INADDR_ANY);
Sevaddr_in.sin_family=AF_INET;
Sevaddr_in.sin_port=htons(6000);
if(SeverSocket==INVALID_SOCKET)
{
cout<<"Create socket failed!"<<endl;
}
int n=bind(SeverSocket,(sockaddr*)&Sevaddr_in,sizeof(Sevaddr_in));
if(n!=0)
cout<<"Bind failed!"<<endl;
if(listen(SeverSocket,5)!=0)
{
cout<<"Listen failed!"<<endl;
}


while(true)
{
int length=sizeof(Cliaddr_in);
CliSocket=accept(SeverSocket,(sockaddr*)&Cliaddr_in,&length);
char *Sendbuff=new char[100];
Sendbuff="";
sprintf(Sendbuff,"%s","Welcome!");
//cin.getline(Sendbuff,sizeof(Sendbuff));;
char *recvbuff=new char[100];
recvbuff="";
send(CliSocket,Sendbuff,sizeof(Sendbuff)+1,0);
recv(CliSocket,recvbuff,sizeof(recvbuff)+1,0);
cout<<recvbuff<<endl;
}
closesocket(SeverSocket);
WSACleanup();
return 0;
}

[smdszgzh]

Cannot open include file: 'stdafx.h': No such file or directory

[yuyunliuhen]

[Quote=引用 6 楼 smdszgzh 的回复:]
把IP改了后，单独运行没问题，先运行服务器再运行客户端就出错！
[/Quote]

那是你字符串的操作问题
和SOCKET无关

[arong1234]

127.0.0.1是环回地址，报文根本不出你的网卡
你应该用0.0.0.0或者把inet_addr("0.0.0.0")换成INADDR_ANY宏即可，其实就是unsigned int 0
[Quote=引用 4 楼 hairetz 的回复:]
("127,0,0,1");
汗,怎么是,应该是.
[/Quote]

[yuyunliuhen]

WSAGetLastError() 查查错误代码

[yuyunliuhen]

很明显 IP地址 127.0.0.1

[猫已经找不回了]

服务器那边的accept家调试信息看看.

[猫已经找不回了]

("127,0,0,1");
汗,怎么是,应该是.

[chin_chen]

#include <Winsock2.h>

然后再依赖库里面加上一个 Ws2_32.lib.

[smdszgzh]

把IP改了后，单独运行没问题，先运行服务器再运行客户端就出错！