我创建了一个连接到C++服务器的C++客户端。 它连接并正确发送数据到服务器。 我创建了一个单独的线程来接收来自服务器的数据,这里是我无法弄清楚的问题。 我得到这个错误:C++客户端中的WSAGetLastError 10038
WSAGetLastError 10038
我发现这个错误,因为描述符不是一个套接字。
服务器发送方法正常工作,我用telnet客户端测试它。
这是我的客户端代码:
#include <winsock2.h>
#include <windows.h>
#include <fcntl.h>
#include <string.h>
#include <stdlib.h>
#include <errno.h>
#include <stdio.h>
#include <conio.h>
#include<iostream>
using namespace std;
int hsock;
void *SocketHandler(void*);
int main(int argv, char** argc){
//The port and address you want to connect to
int host_port= 2000;//1101;
char* host_name="10.188.126.198";
pthread_t recept;
//Initialize socket support WINDOWS ONLY!
unsigned short wVersionRequested;
WSADATA wsaData;
int err;
wVersionRequested = MAKEWORD(2, 2);
err = WSAStartup(wVersionRequested, &wsaData);
if (err != 0 || (LOBYTE(wsaData.wVersion) != 2 ||
HIBYTE(wsaData.wVersion) != 2)) {
fprintf(stderr, "Could not find useable sock dll %d\n",WSAGetLastError());
return 0;
}
//Initialize sockets and set any options
int * p_int ;
hsock = socket(AF_INET, SOCK_STREAM, 0);
if(hsock == -1){
printf("Error initializing socket %d\n",WSAGetLastError());
return 0;
}
p_int = (int*)malloc(sizeof(int));
*p_int = 1;
if((setsockopt(hsock, SOL_SOCKET, SO_REUSEADDR, (char*)p_int, sizeof(int)) == -1)||
(setsockopt(hsock, SOL_SOCKET, SO_KEEPALIVE, (char*)p_int, sizeof(int)) == -1)){
printf("Error setting options %d\n", WSAGetLastError());
free(p_int);
return 0;
}
free(p_int);
//Connect to the server
struct sockaddr_in my_addr;
my_addr.sin_family = AF_INET ;
my_addr.sin_port = htons(host_port);
memset(&(my_addr.sin_zero), 0, 8);
my_addr.sin_addr.s_addr = inet_addr(host_name);
int *csock ;
csock = (int*)malloc(sizeof(int));
if((*csock =connect(hsock, (struct sockaddr*)&my_addr, sizeof(my_addr))) == SOCKET_ERROR){
fprintf(stderr, "Error connecting socket %d\n", WSAGetLastError());
return 0;
}
cout<<"Client connect to :"<< htons(host_port)<<endl;
//Create thread to receive data from the server
// the problem is here as I think
pthread_create(&recept,NULL,SocketHandler,(void *)csock);
/// Send data to the server
char buffer[1024];
int buffer_len = 1024;
int bytecount;
int c;
while(true){
memset(buffer, '\0', buffer_len);
for(char* p=buffer ; (c=getch())!=13 ; p++){
printf("%c", c);
*p = c;
}
if((bytecount=send(hsock, buffer, strlen(buffer),0))==SOCKET_ERROR){
fprintf(stderr, "Error sending data %d\n", WSAGetLastError());
return 0;
}
printf("Sent bytes %d\n", bytecount);
}
closesocket(hsock);
return 0;
}
void *SocketHandler(void* lp){
int *csock= (int*)lp;
cout<<"Start Listening Thread"<<endl;
char buffer[1024];
int buffer_len = 1024;
int bytecount;
memset(buffer, 0, buffer_len);
while(1){
memset(buffer, 0, buffer_len);
if((bytecount = recv(*csock, buffer, buffer_len, 0))==SOCKET_ERROR){
fprintf(stderr, "Error receiving data %d\n", WSAGetLastError());
break;
}
printf("Received bytes %d\nReceived string \"%s\"\n", bytecount, buffer);
}
free(csock);
return 0;
}
检查[连接](https://msdn.microsoft.com/en- us/library/windows/desktop/ms737625(v = vs.85).aspx)的返回值:_If没有错误发生,连接返回零。否则,它会返回SOCKET_ERROR,并且可以通过调用WSAGetLastError._来检索特定的错误代码。您将其分配给'* csock',然后对其执行'recv'。 – CristiFati
正如我所说,客户端连接正确,并且可以将数据发送到服务器。问题出在recv方法的线程上。 – Kamel
确切地说。 'connect'成功,并返回_0_。所以:'* csock = 0;'然后你有'if((bytecount = recv(* csock,buffer,...'你在_0_上调用'recv',通常是_stdin_。 – CristiFati