connect & recv

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dacid

Joined: 31 Aug 2008
Posts: 57

dacid

i connect to a port using "connect" and then i try to receive the data with "recv" but it fails. I suspect that first i must "send" something after "recv"... is this correct?

03 Dec 2008, 23:31

MoXter

Joined: 29 Apr 2006
Posts: 3

MoXter

If no error occurs, recv returns the number of bytes received. If the connection has been gracefully closed, the return value is zero. Otherwise, a value of SOCKET_ERROR is returned, and a specific error code can be retrieved by calling WSAGetLastError. As you didnt send any data,function return error.

04 Dec 2008, 00:28

dacid

Joined: 31 Aug 2008
Posts: 57

dacid

buy when you connect to a port that "returns" something it is neccessary to send something before recv?

04 Dec 2008, 09:20

asmcoder

Joined: 02 Jun 2008
Posts: 784

asmcoder

[content deleted]

Last edited by asmcoder on 14 Aug 2009, 14:54; edited 1 time in total

04 Dec 2008, 10:59

dacid

Joined: 31 Aug 2008
Posts: 57

dacid

It is a console application:

Code:


LOCAL   recvbuf[4096]:BYTE

invoke  connect,hSocket,ADDR sockinfo,size sockaddr

...

invoke  select,hSocket,0,ADDR readfds,0,ADDR timeout

invoke  recv,hSocket,ADDR recvbuf,4096,NULL

GetLastError returns 10035 & 10057

04 Dec 2008, 14:31

asmcoder

Joined: 02 Jun 2008
Posts: 784

asmcoder

[content deleted]

Last edited by asmcoder on 14 Aug 2009, 14:54; edited 1 time in total

04 Dec 2008, 14:46

dacid

Joined: 31 Aug 2008
Posts: 57

dacid

you can change invoke to call and its the same in this particular case... the connect function and select works ok... plz dont tell me in what language should i code Smile

04 Dec 2008, 19:11

asmcoder

Joined: 02 Jun 2008
Posts: 784

asmcoder

[content deleted]

Last edited by asmcoder on 14 Aug 2009, 14:54; edited 1 time in total

04 Dec 2008, 20:39

LocoDelAssembly
Your code has a bug

Joined: 06 May 2005
Posts: 4633
Location: Argentina

LocoDelAssembly

dacid, save some time by searching the forum for already working examples and/or links instead.

04 Dec 2008, 21:07

dacid

Joined: 31 Aug 2008
Posts: 57

dacid

I cant post all source because it is code for my job Sad

i will keep on trying Smile

LOCAL defines a LOCAL variable or buffer, in this case it is a BUFFER of 4096 bytes where the data "recv" will be stored.

ADDR its offset.

Thx you anyway!

06 Dec 2008, 23:05

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