I have read madwizard tutorial and I know a bit thing about winsock.
Here is my code.
include ws2_32.inc
includelib ws2_32.lib
WM_FSOCKET equ WM_USER + 0fh
.data
wsadata WSADATA <>
sin sockaddr_in <>
.data?
sock dd ?
error_code dd ?
.code
fInitInternet proc hWnd:dword
; Mad wizard tutorial
invoke WSAStartup,101h,addr wsadata
.if eax!=0
xor eax,eax
dec eax
ret
.endif
invoke socket,AF_INET,SOCK_STREAM,0 ; Create a stream socket for internet use
.if eax!=INVALID_SOCKET
mov sock,eax
invoke WSAAsyncSelect,sock,hWnd,WM_FSOCKET,FD_CONNECT+FD_READ+FD_CLOSE+FD_WRITE+FD_ACCEPT
.else
invoke MessageBox,hWnd,CADD("Internet connection initialization error"),CADD("Unknown cause"),MB_OK
.endif
ret
fInitInternet endp
fCloseInternet proc
invoke closesocket,sock
invoke WSACleanup
ret
fCloseInternet endp
fConnect proc uses esi edi lpszHostName:dword,nPortNumber:dword
mov sin.sin_family, AF_INET
invoke htons, nPortNumber
mov sin.sin_port,ax
invoke gethostbyname, lpszHostName
.if eax==0
invoke PERR
ret
.endif
mov eax,[eax+12]
mov eax,[eax] ; copy the pointer to the actual IP address into eax
mov eax,[eax] ; copy IP address into eax
mov sin.sin_addr,eax
invoke connect,sock,addr sin,sizeof sin
.if eax==SOCKET_ERROR
invoke WSAGetLastError
.endif
ret
fConnect endp
The problem is, I cannot use send API. Everytime I use API I got this error message: "A request to send or receive data was disallowed because the socket is not connected". I have use fConnect to connect the sockert and there is no error message. Anyone can explain what is my mistake and maybe guide me?
When "connect" returns it does not mean the connection was successful (or failed) - the socket is not connected yet.
When the connection has completed, you will receive FD_CONNECT in your WM_FSOCKET message - it will say whether the connection was successful.
Read and understand ALL of the comments and explanation for "WSAAsyncSelect"
(Or, don't use it, and your socket will be blocking - so it will wait for connect/read/send to finish before returning.)
Welcome back Farabi. :U
Mark:
Thanks.
all:
I think I need a example source code of a working connection. anyone can help?
I stumbled over something odd a day ago: I installed a software package that tried to download an extra file, which triggered a message box by the firewall. Fine so far. What is odd is that on the same virgin pc I had installed my own baby (link in the signature), which also downloads files using urlmon.dll when pressing Control F5. No firewall message box!
Of course I am damn proud that I could cheat the firewall so easily, but still I'd like to know how I did it. I am sure MSIE uses urlmon; is it possible that an app "inherits" access rights from MSIE simply because it uses the same dll? If that is true, I would call it a security risk (or is it "by design"?). I know this is off topic but readers of "winsock question" might be in a position to solve the mystery...
Is the waiting accept from my code is right?
mov ecx,SOCKET_ERROR
@@:
push ecx
invoke accept,sock,NULL,NULL
pushad
; invoke PERR
popad
pop ecx
cmp eax,ecx
jz @b
Here is the complete code.
fConnect proc uses esi edi lpszHostName:dword,nPortNumber:dword
LOCAL buff[128]:byte
mov sin.sin_family, AF_INET
invoke htons, nPortNumber
mov sin.sin_port,ax
invoke gethostbyname, lpszHostName
.if eax==0
invoke PERR
ret
.endif
mov eax,[eax+12]
mov eax,[eax] ; copy the pointer to the actual IP address into eax
mov eax,[eax] ; copy IP address into eax
xor eax,eax
mov sin.sin_addr,eax
invoke bind,sock,addr sin, sizeof sockaddr_in
.if eax!=0
invoke PERR
ret
.endif
invoke listen,sock,1
.if eax!=0
invoke PERR
ret
.endif
mov ecx,SOCKET_ERROR
@@:
push ecx
invoke accept,sock,NULL,NULL
pushad
; invoke PERR
popad
pop ecx
cmp eax,ecx
jz @b
; invoke connect,sock,addr sin,sizeof sin
; .if eax==SOCKET_ERROR
; invoke WSAGetLastError
; .endif
ret
fConnect endp
Here is how I call the function
invoke fConnect,CADD("www.awardspace.com"),80
please help.
Hi Farabi,
see client.asm!
[attachment deleted by admin]
Hai hoverlees your client.exe is working well, but Im still cannot get it working when I implement it to my code. I sent my full source code to your email, I hope you can read it.
My email account is
[email protected] please check it.
hi,
I try to get the main page on internet using this command "GET / HTTP/1.0" and its work, but when I send it for the second time I got a message "an established connection was aborted by the software in your host machine". why is that happen? I think last night it didnot appear.