我试图将客户端倍增,并将其发送给每个客户端。 但它只能用于一个,一个客户端连接服务器后只对传入连接无用。
while(true)
{
if(Sub = accept(Socket, (sockaddr*)&IncomingAddress, &AddressLen))
{
for(int i = 0; i < MaxUsers; i++)
{
if(!ClientAddress[i].sin_family)
{
ClientAddress[i] = IncomingAddress;
char Version[128], Dir[256], Path[256], URL[128], Message[256];
GetCurrentDirectory(256, Dir);
sprintf(Path, "%s\\Version.ini", Dir);
GetPrivateProfileString("Default", "Version", "1.0.0.0", Version, 128, Path);
GetPrivateProfileString("Default", "URL", "", URL, 128, Path);
GetPrivateProfileString("Default", "Message", "", Message, 256, Path);
send(Sub, Version, 128, 0);
send(Sub, Message, 256, 0);
break;
}
}
continue;
}
}
答案 0 :(得分:11)
当然无法接受新客户端,因为服务器只处理接受的客户端,即服务器正忙。
解决方案很简单:为每个接受的客户端创建一个新线程,并在那里处理客户端会话。只需使用_beginthreadex()
(#include <process.h>
):
unsigned __stdcall ClientSession(void *data)
{
SOCKET client_socket = (SOCKET)data;
// Process the client.
}
int _tmain(int argc, _TCHAR* argv[])
{
...
SOCKET client_socket;
while ((client_socket = accept(server_socket, NULL, NULL))) {
// Create a new thread for the accepted client (also pass the accepted client socket).
unsigned threadID;
HANDLE hThread = (HANDLE)_beginthreadex(NULL, 0, &ClientSession, (void*)client_socket, 0, &threadID);
}
}
顺便说一句,send()/recv()
函数不保证在一次通话中发送/接收所有数据。有关这些功能的返回值,请参阅文档。
答案 1 :(得分:4)
接受套接字后,为客户端请求创建单独的线程。然后继续等待新的接受。
例如:
...
while (1)
{
AcceptSocket = SOCKET_ERROR;
while (AcceptSocket == SOCKET_ERROR )
{
AcceptSocket = accept( m_socket, NULL, NULL );
}
printf( "Client Connected.\n");
DWORD dwThreadId;
CreateThread (NULL, 0, ProcessClient, (LPVOID) AcceptSocket, 0, &dwThreadId);
}
...
ProcessClient函数可以是这样的:
DWORD WINAPI ProcessClient (LPVOID lpParameter)
{
SOCKET AcceptSocket = (SOCKET) lpParameter;
// Send and receive data.
int bytesSent;
int bytesRecv = SOCKET_ERROR;
char sendbuf[2000]="";
char recvbuf[2000]="";
char timebuf[128];
sprintf(sendbuf, "Hello, it's a test server at %s:%d (commands: 1, 2, exit)\n", ipaddr, port);
bytesSent = send( AcceptSocket, sendbuf, strlen(sendbuf), 0);
if (bytesSent == SOCKET_ERROR)
{
printf( "Error at send hello: %ld\n", WSAGetLastError());
goto fin;
}
while (1)
{
_strtime( timebuf );
ZeroMemory (recvbuf, sizeof(recvbuf));
bytesRecv = recv( AcceptSocket, recvbuf, 32, 0);
printf( "%s Client said: %s\n", timebuf, recvbuf);
if (strcmp(recvbuf, "1") == 0)
{
sprintf(sendbuf, "You typed ONE\n");
//printf("Sent '%s'\n", sendbuf);
bytesSent = send( AcceptSocket, sendbuf, strlen(sendbuf), 0);
if (bytesSent == SOCKET_ERROR)
{
printf( "Error at send: %ld\n", WSAGetLastError());
goto fin;
}
}
else if (strcmp(recvbuf, "2") == 0)
{
sprintf(sendbuf, "You typed TWO\n");
//printf("Sent '%s'\n", sendbuf);
bytesSent = send( AcceptSocket, sendbuf, strlen(sendbuf), 0);
if (bytesSent == SOCKET_ERROR)
{
printf( "Error at send: %ld\n", WSAGetLastError());
goto fin;
}
}
else if (strcmp(recvbuf, "exit") == 0)
{
printf( "Client has logged out\n", WSAGetLastError());
goto fin;
}
else
{
sprintf(sendbuf, "unknown command\n");
//printf("Sent '%s'\n", sendbuf);
bytesSent = send( AcceptSocket, sendbuf, strlen(sendbuf), 0);
if (bytesSent == SOCKET_ERROR)
{
printf( "Error at send: %ld\n", WSAGetLastError());
goto fin;
}
}
}
fin:
printf("Client processed\n");
closesocket(AcceptSocket);
return 0;
}