수다닷컴

질문 제목 : 질문 내용 :
wsaasyncselect 를 이용해서 소켓을 논블럭킹 모드로 만들고 프로그래밍을 하고 있는데요!
send() 는 정상적으로 작동을 하는데 recv() 는 작동이 안되네요..int apientry winmain(hinstance hinstance,
hinstance hprevinstance,
lpstr lpcmdline,
int ncmdshow)
{
wsadata wsa;

if ( wsastartup(makeword(2, 2), &wsa) )
{
char errorcode[10] = {0}, errormessage[260] = wsastartup() api failed\nerrcode: ;
itoa(wsagetlasterror(), errorcode, 10);
strcat(errormessage, errorcode);
messageboxa(null, errormessage, ishsocket::socket, 16);
return 0;
}
else
messagebox(null, wsastartup() success, ishclient, 64); msg msg;
myregisterclass(hinstance);
initinstance(hinstance, ncmdshow); if ( wsaasyncselect(sckclient, ghwnd, wm_user + 1, fd_connect | fd_accept | fd_close | fd_read) )
{
char errorcode[10] = {0}, errormessage[260] = wsaasyncselect() api failed\nerrcode: ;
itoa(wsagetlasterror(), errorcode, 10);
strcat(errormessage, errorcode);
messageboxa(null, errormessage, ishsocket::socket, 16);
return 0;
}
else
messagebox(null, wsaasyncselect() success, ishclient, 64); sockaddr_in addr;
memset(&addr, 0, sizeof(addr));
addr.sin_family = pf_inet;
addr.sin_port = htons(7777);
addr.sin_addr.s_addr = inet_addr(resolvehostname(121.169.69.150)); while ( 1 )
{
messagebox(null, connecting to 121.169.69.150:7777, ishclient, 64);
if ( !connect(sckclient, (sockaddr *)&addr, sizeof(addr)) )
{
if ( messagebox(null, reconnect?, ishclient, mb_yesno) == idno )
break;
}
else
{
messagebox(null, connected!, ishclient, 64);
break;
}
} // main message loop:
while (getmessage(&msg, null, 0, 0))
{
translatemessage(&msg);
dispatchmessage(&msg);
} return msg.wparam;
}lresult callback wndproc(hwnd hwnd, uint message, wparam wparam, lparam lparam)
{
switch (message)
{
// terminate command:
case wm_destroy:
{
postquitmessage(0);
break;
}
// when windows created:
case wm_create:
{
sckclient = socket(af_inet, sock_stream, ipproto_ip); if ( socket 0 )
{
char errorcode[10] = {0}, errormessage[260] = socket() api failed\nerrcode: ;
itoa(wsagetlasterror(), errorcode, 10);
strcat(errormessage, errorcode);
messageboxa(null, errormessage, ishsocket::socket, 16);
return 0;
}
else
messagebox(null, socket() success, ishclient, 64); // nothing to do
break;
}
case wm_user + 1:
{
socket s = (socket)wparam;
switch ( wsagetselectevent(lparam) )
{
case fd_accept:
break;
case fd_read:
{
dword dwdatasize;
wchar wbuffer[260] = {0};
//dwdatasize = getdata(sckclient, wbuffer);
(이부분을 주석처리 안하고 실행하면 access violation 이 떠서 프로그램이 종료되거나,
recv 의 결과값이 0 인 채로 무한 루프에 빠져버립니다 ㅠㅠ)
// 전송받은 데이터가 없다면 그냥 종료한다.
if ( dwdatasize == 0 )
return 0; messageboxw(hwnd, wbuffer, lishclient, 64);
// 전송받은 데이터를 이용해서 패킷을 확인한다.
if ( wcsncmp(wbuffer, l연결, 4) )
{
senddata(sckclient, l성공);
}
break;
}
case fd_write:
break;
case fd_close:
break;
}
}
default:
r return defwindowproc(hwnd, message, wparam, lparam);
}
return 0;
}dword getdata(socket s, const wchar buffer[])
{
dword dwresult = recv(s, (char *)buffer, crecvbuffer, 0); if ( dwresult == -1 )
{
char errorcode[10] = {0}, errormessage[260] = recv() api failed\nerrcode: ;
itoa(wsagetlasterror(), errorcode, 10);
strcat(errormessage, errorcode);
messageboxa(null, errormessage, get data, 16);
return 0;
}
else if ( dwresult == 0 )
{
messageboxa(null, socket closed!, get data, 16);
return 0;
}
else
{
return dwresult;
}
}dword senddata(socket s, const wchar buffer[])
{
if ( s != invalid_socket )
{
dword dwresult = send(s, (char *)buffer, wcslen(buffer) * 2, 0); if ( dwresult == -1 )
{
char errorcode[10] = {0}, errormessage[260] = send() api failed\nerrcode: ;
itoa(wsagetlasterror(), errorcode, 10);
strcat(errormessage, errorcode);
messageboxa(null, errormessage, ishsocket::socket.senddata, 16);
return false;
} return dwresult;
} messagebox(null, invalid socket handle, ishsocket::socket.senddata, 16);
return 0;
}vb 에서 프로그래밍하던걸 c 로 바꾸니까 이해가 안되는것도 있고 데이터 형식 다루는것도 힘들고 ㅠㅠ 어렵네요 역시 ...

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