ASM Community

Hi!

I have a problem with my Winsock code.
I am connecting via UDP to a machine on the local network. On this machine, there runs a third-party app, wich sends 4k of data as response, after I send a 11byte packet to it.
The code runs fine if I run it only one time, but fails if I call it in a loop with multiple IP's :(

EDIT: Well, it not just fails... it simply hangs after the "sendto" call. But it even doesnt return "SOCKET_ERROR" :confused:

Anyone knows what the error could be?

[...]

    .if uMsg == WM_CREATE

    

        invoke WSAStartup, 2h, addr wsa

[...]

    .elseif uMsg == WM_DESTROY



        call WSACleanup

[...]

GetServerData proc pIP :DWORD, pPort :DWORD



    invoke RtlZeroMemory, addr szBuffer, 5120



    invoke socket, AF_INET, SOCK_DGRAM, 0

    mov nSocket, eax



    mov sin.sin_family, AF_INET



    invoke atodw, pPort

    inc eax

    invoke htons, eax

    mov sin.sin_port, ax

    invoke inet_addr, pIP

    mov sin.sin_addr, eax

    mov eax, sizeof sin

    mov nRead, eax



    invoke connect, nSocket, addr sin, sizeof sin



    invoke sendto, nSocket, addr szStatus, 11, 0, addr sin, sizeof sin

    invoke Sleep, 200

@@:

    invoke recvfrom, nSocket, addr szBuffer, 5120, 0, addr sin, addr nRead

    or eax, eax

    jz @B



    invoke closesocket, nSocket    



    ret



GetServerData endp

[...]

Thanks in advance,
bAZiK

Hmmm.... sounds like a good idea.
But it also hangs if I remove the loop :confused:

Anyway, I will try the FD_READ variante tomorrow....

Need to get some sleep now ;)

Kudos,
if you beleive it or not, but this solved my problem!

I commented the "connect" line, and now it doesnt stall anymore!
At least with 3 entries... gonna test it with more now!


Thanks so far!