在Visual Studio中使用C++编写Socket编程

Question

我编写了一个用于聊天的程序，但是当我运行服务器端时，它会在listen函数中产生错误。我不知道是什么原因造成的错误！顺便说一句，我该如何运行它？第一台服务器然后客户端？IP地址怎么样？我如何设置他们？我想在同一台PC上运行它。 '

#include "stdafx.h" 
    #include <winsock2.h> 
    #include <Ws2tcpip.h> 
    #include <stdio.h> 
    #include "iostream" 
    #include "conio.h" 
    using namespace std; 
    #pragma comment(lib, "Ws2_32.lib") 
    #define WIN32_LEAN_AND_MEAN 
    #define DEFAULT_BUFLEN 512 
    #define DEFAULT_PORT 27015 

int main() 
{ 

WSADATA wsaData; 
int iResult = 0;    
int recvbuflen = DEFAULT_BUFLEN; 
char *sendbuf = "Server: sending data test"; 
char recvbuf[DEFAULT_BUFLEN] = ""; 


SOCKET ListenSocket = INVALID_SOCKET; 


sockaddr_in service; 


iResult = WSAStartup(MAKEWORD(2, 2), &wsaData); 
if (iResult != NO_ERROR) { 
    cout<<"Error at WSAStartup()\n"; 

} 

ListenSocket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP); 
if (ListenSocket == INVALID_SOCKET) { 
    cout<<"socket function failed with error: %u\n"<< WSAGetLastError(); 
    WSACleanup(); 
    getch(); 

} 

service.sin_family = AF_INET; 
service.sin_addr.s_addr = inet_addr("192.168.1.52"); 
service.sin_port = htons(27015); 

iResult = bind(ListenSocket, (SOCKADDR *) &service, sizeof (service)); 
if (iResult == SOCKET_ERROR) { 
    cout<<"bind failed with error \n"<< WSAGetLastError(); 
    getch(); 
    closesocket(ListenSocket); 
    WSACleanup(); 

} 
else{ 

    wprintf(L"bind returned success\n"); 
    WSACleanup(); 
    getch(); 
} 

if (listen(ListenSocket, SOMAXCONN) == SOCKET_ERROR){ 
    cout<<"listen function failed with error: "<< WSAGetLastError(); 
    iResult = closesocket(ListenSocket); 
    WSACleanup(); 
    getch(); 
} 



cout<<"Waiting for client to connect...\n"; 

ListenSocket = accept(ListenSocket, NULL, NULL); 
if (ListenSocket == INVALID_SOCKET) { 
    cout<<"accept failed with error: \n"<< WSAGetLastError(); 
    closesocket(ListenSocket); 
    WSACleanup(); 
    getch(); 
} else 
    cout<<"Client connected.\n"; 

iResult = send(ListenSocket, sendbuf, (int)strlen(sendbuf), 0); 
if (iResult == SOCKET_ERROR) { 
    cout<<"send failed with error: "<< WSAGetLastError(); 
    closesocket(ListenSocket); 
    getch(); 
    WSACleanup(); 

}else 
    cout<<"Bytes Sent: "<< iResult; 


do { 

    iResult = recv(ListenSocket, recvbuf, recvbuflen, 0); 
    if (iResult > 0) 
     cout<<"Bytes received: "<< iResult; 
    else if (iResult == 0){ 
     cout<<"Connection closed"; 
    getch();} 
    else{ 
     cout<<"recv failed with error: "<< WSAGetLastError(); 
     getch(); 
    } 
} while(iResult > 0); 


iResult = closesocket(ListenSocket); 
if (iResult == SOCKET_ERROR) { 
    cout<<"close failed with error: \n"<< WSAGetLastError(); 
    WSACleanup(); 
    getch(); 
} 


return 0; 
    } 

`

#include "stdafx.h" 
#include <winsock2.h> 
#include <Ws2tcpip.h> 
#include <stdio.h> 
#include "iostream" 
#include "conio.h" 
using namespace std; 
#pragma comment(lib, "Ws2_32.lib") 
#define WIN32_LEAN_AND_MEAN 
#define DEFAULT_BUFLEN 512 
#define DEFAULT_PORT 27015 

int main() { 

int Result; 
WSADATA wsaData; 

SOCKET SocketNumber = INVALID_SOCKET; 
struct sockaddr_in clientService; 

int recvbuflen = DEFAULT_BUFLEN; 
char *sendbuf = "Client: sending data test"; 
char recvbuf[DEFAULT_BUFLEN] = ""; 

Result = WSAStartup(MAKEWORD(2,2), &wsaData); 
if (Result != NO_ERROR) { 
    cout<<"WSAStartup failed with error: "<< Result; 
    getch(); 
} 

SocketNumber = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP); 
if (SocketNumber == INVALID_SOCKET) { 
    cout<<"socket failed with error: "<< WSAGetLastError(); 
     getch(); 
    WSACleanup(); 
} 

clientService.sin_family = AF_INET; 
clientService.sin_addr.s_addr = inet_addr("127.0.0.1"); 
clientService.sin_port = htons(DEFAULT_PORT); 

Result = connect(SocketNumber, (SOCKADDR*) &clientService, sizeof(clientService)); 
if (Result == SOCKET_ERROR) { 
    cout<<"connect failed with error: "<< WSAGetLastError(); 
    closesocket(SocketNumber); 
    getch(); 
    WSACleanup(); 

} 
Result = send(SocketNumber, sendbuf, (int)strlen(sendbuf), 0); 
if (Result == SOCKET_ERROR) { 
    cout<<"send failed with error: "<< WSAGetLastError(); 
    closesocket(SocketNumber); 
    getch(); 
    WSACleanup(); 

} 

cout<<"Bytes Sent: "<< Result; 

Result = shutdown(SocketNumber, SD_SEND); 
if (Result == SOCKET_ERROR) { 
    cout<<"shutdown failed with error: "<< WSAGetLastError(); 
    closesocket(SocketNumber); 
     getch(); 
    WSACleanup(); 

} 
do { 

    Result = recv(SocketNumber, recvbuf, recvbuflen, 0); 
    if (Result > 0) 
     cout<<"Bytes received: "<< Result; 
    else if (Result == 0) 
     cout<<"Connection closed"; 
    else 
     cout<<"recv failed with error: "<< WSAGetLastError(); 
     getch(); 
} while(Result > 0); 


Result = closesocket(SocketNumber); 
if (Result == SOCKET_ERROR) { 
    wprintf(L"close failed with error: %d\n", WSAGetLastError()); 
     getch(); 
    WSACleanup(); 
    return 1; 
} 

WSACleanup(); 

return 0; 
} 

Answer 1

删除两行之后 “wprintf（L” 绑定返回成功\ n “）;”在服务器中，我的意思是这些行：

WSACleanup(); 
getch(); 

它会好的！