我正在尝试用C ++创建异步服务器监听器我是c ++的新手但我必须做这个项目，我是Web开发人员（PHP）但是PHP无法建立异步连接+他的语言非常差连接数...我可以编写简单的监听器而不是异步但现在我有“CreateThread”的问题...例如，如果客户端已连接控制台给我结果这个+嗅探器可以修复它... 10秒后客户端必须再次向我发送包含不同数据的相同数据包我的控制台没有给我关于那个数据包的结果但是嗅探器可以看到那个数据包...如果有人能看到我的问题解释我......（抱歉我的英语不好：D）
#include <winsock2.h>
#include <windows.h>
#include <fcntl.h>
#include <string.h>
#include <stdlib.h>
#include <errno.h>
#include <stdio.h>
DWORD WINAPI SocketHandler(void*);
int main(int argv, char** argc){
//The port you want the server to listen on
int host_port = 7878;
//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());
}
//Initialize sockets and set any options
int hsock;
int * p_int ;
hsock = socket(AF_INET, SOCK_STREAM, 0);
if(hsock == -1){
printf("Error initializing socket %d\n",WSAGetLastError());
}
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);
}
free(p_int);
//Bind and listen
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 = INADDR_ANY ;
if( bind( hsock, (struct sockaddr*)&my_addr, sizeof(my_addr)) == -1 ){
fprintf(stderr,"Error binding to socket, make sure nothing else is listening on this port %d\n",WSAGetLastError());
}
if(listen( hsock, 10) == -1 ){
fprintf(stderr, "Error listening %d\n",WSAGetLastError());
}
//Now lets to the server stuff
int* csock;
sockaddr_in sadr;
int addr_size = sizeof(SOCKADDR);
while(true){
printf("waiting for a connection\n");
csock = (int*)malloc(sizeof(int));
if((*csock = accept( hsock, (SOCKADDR*)&sadr, &addr_size))!= INVALID_SOCKET ){
printf("Received connection from %s",inet_ntoa(sadr.sin_addr));
CreateThread(0,0,&SocketHandler, (void*)csock , 0,0);
}
else{
fprintf(stderr, "Error accepting %d\n",WSAGetLastError());
}
}
}
DWORD WINAPI SocketHandler(void* lp){
int *csock = (int*)lp;
char buffer[1024];
int buffer_len = 1024;
int bytecount;
memset(buffer, 0, buffer_len);
if((bytecount = recv(*csock, buffer, buffer_len, 0))==SOCKET_ERROR){
fprintf(stderr, "Error receiving data %d\n", WSAGetLastError());
}
printf("Received bytes %d\n Received string \"%s\"\n", bytecount, buffer);
char buff[1] = {0x11};
if((bytecount = send(*csock, buff, 1, 0))==SOCKET_ERROR){
fprintf(stderr, "Error sending data %d\n", WSAGetLastError());
}
printf("Sent bytes: %d. Send Message: %s\n ", bytecount,buff);
free(csock);
}
答案 0 :(得分：1)
我怀疑问题不是创建一个线程，而是传递数据。将套接字传递给线程可能更简单。此外，在功能结束时，您正确释放内存，但您没有关闭套接字。我做了更改并验证它是否正常运行。我所做的更改是// *
的评论#include <winsock2.h>
#include <windows.h>
#include <fcntl.h>
#include <string.h>
#include <stdlib.h>
#include <errno.h>
#include <stdio.h>
DWORD WINAPI SocketHandler(void*);
//*** Changed to work with my version of
//*** Visual Studio
int _tmain(int argc, _TCHAR* argv[]){
//The port you want the server to listen on
int host_port = 7878;
//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());
}
//Initialize sockets and set any options
//*** Changed to be SOCKET instead of int
SOCKET hsock;
int * p_int ;
hsock = socket(AF_INET, SOCK_STREAM, 0);
if(hsock == -1){
printf("Error initializing socket %d\n",WSAGetLastError());
}
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);
}
free(p_int);
//Bind and listen
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 = INADDR_ANY ;
if( bind( hsock, (struct sockaddr*)&my_addr, sizeof(my_addr)) == -1 ){
fprintf(stderr,"Error binding to socket, make sure nothing else is listening on this port %d\n",WSAGetLastError());
}
if(listen( hsock, 10) == -1 ){
fprintf(stderr, "Error listening %d\n",WSAGetLastError());
}
//Now lets to the server stuff
//*** Changed to be SOCKET instead of int*
SOCKET csock;
sockaddr_in sadr;
int addr_size = sizeof(SOCKADDR);
while(true){
printf("waiting for a connection\n");
//*** Changed to comment out line as it is not needed
// csock = (SOCKET)malloc(sizeof(SOCKET));
//*** Changed check to be INVALID_SOCKET
if((csock = accept( hsock, (SOCKADDR*)&sadr, &addr_size))!= INVALID_SOCKET ){
printf("Received connection from %s",inet_ntoa(sadr.sin_addr));
//*** Changed to pass the client socket
CreateThread(0,0,&SocketHandler, (void*)csock , 0,0);
}
else{
fprintf(stderr, "Error accepting %d\n",WSAGetLastError());
}
}
}
DWORD WINAPI SocketHandler(void* lp){
//** Changed to cast as the SOCKET which was passed
SOCKET csock = (SOCKET)lp;
char buffer[1024];
int buffer_len = 1024;
int bytecount;
memset(buffer, 0, buffer_len);
if((bytecount = recv(csock, buffer, buffer_len, 0))==SOCKET_ERROR){
fprintf(stderr, "Error receiving data %d\n", WSAGetLastError());
}
printf("Received bytes: %d\nReceived string: \"%s\"\n", bytecount, buffer);
char buff[1] = {0x11};
if((bytecount = send(csock, buff, 1, 0))==SOCKET_ERROR){
fprintf(stderr, "Error sending data %d\n", WSAGetLastError());
}
printf("Sent bytes: %d. Send Message: %s\n ", bytecount,buff);
//*** Changed to close the socket after the message is sent. Otherwise
//*** the socket would remain open
closesocket(csock);
//*** Changed to comment the line out as there is
//*** no allocated memory.
//free(csock);
return 0;
}