SOCKET can create,listen,accept, but cannot send

//dialog.cpp//
Client.Create()
Server.Create(8000,SOCK_STREAM,myIP)
Server.Listen()

//socket.cpp//
OnAccept()
{
Accept(Client,0,0)
}

//dialog.cpp//
Client.GetPeerName(ClientIP,portnumber);
// ClientIP=""
//portnumber=3435973836
Client.Send(lpBuffer,sizeof(lpBuffer));

Dont look normal right?

http://www.codeguru.com/forum/attach...&postid=822809

surely sizeof(lpBuffer) is wrong. Thats the size of the pointer to your data, not the numbe rof bytes of data you want to send.

You are only sending 4 bytes.

ok

like this?

Client.Send( lpBuffer, sizeof(*lpBuffer) );

No.

the value returned by the sizeof operator is derived at compile time. Its not dynamic.

What type is lpBuffer. ie. what are you trying to send.

wanted to send a string......
around 15 bytes.....

so how should i do tat?

anyone?

:confused:

Try strlen
Hope this helps,
Regards,
Usman.

thanks strlen works....

but still i cant send......
the error is WSAENOTCONN
10057 when i use GetLastError()

Socket is not connected.
A request to send or receive data was disallowed because the socket is not connected and (when sending on a datagram socket using sendto) no address was supplied. Any other type of operation might also return this error—for example, setsockopt setting SO_KEEPALIVE if the connection has been reset.

The info tat i got from GetPeerName b4 i try sending is a bit funny...see 1st post.....

so what can b wrong....?

I dont see in the first post of yours that you are calling connect . You need to call connect Mr ;).
Hope this helps,
Regards,
Usman.

OK.....This is the server part...residing on PC 1

In my understanding, Server needs to create a socket.
socket.create()
socket.listen()

OnAccept()
{
Accept(client,0,0);//client is an socket object used for sending and receiving....tats wat i thought....
}

My understanding for server is create,listen,accept when a client makes a connection request. and after accepting, i can use socket.send.....

Client part which is residing on PC 2 is
Client.create()
Client.connect()

OnReceive()
{
//display data.....
}

Is the flow correct?
Or server also need to connect?
???????

I never did a server aplication but may be for server you need to call bind instead of connect.
Regards,
Usman.

I m not sure abt that too.....
from reading, bind is used onli for binding to a certain port....
and from most sample apps i seen....
they dont use it.....
someone mentioned that .create will auto bind the socket....

anyone who can clarify?

I can send already......
but that is possible on in the socket class....
in OnAccept()

in the main app,//dialog.cpp
I tried using same socket client object that accepted the connection to send but cannot.....

seems like its uninitialised......instead of the same client socket obj that has accepted the connection....

someone mentioned that a variable declared static and global in a class.h is onli class-wide...n other class will have their own instance of the variable....

he recommended declaring the variable in .cpp and using extern in .h

it did worked....and i have all classes n obj accessing the same variable instead of accessing theor own variable....

BUT it didnt seem to work for this socket obj.....

HELP.......

:confused:

:confused:

:confused:

:confused:

:confused:

if u want to connect a server and a client u must follow this
//Client
Client_Sock.create();
Client_Sock.Connect(server_adr,nport);
send(Client_Sock,buffer,strlen(buffer),0);
//Server
Server_Sock.Create(nport);//the same port
Server_Sock.Listen();
Server_Sock.Accept(tmpSock);
recv(tmpSock,buffer,strlen(buffer),0);
hope that will help

Quote:

---

Originally posted by Black_Daimond
if u want to connect a server and a client u must follow this
//Client
Client_Sock.create();
Client_Sock.Connect(server_adr,nport);
send(Client_Sock,buffer,strlen(buffer),0);
//Server
Server_Sock.Create(nport);//the same port
Server_Sock.Listen();
Server_Sock.Accept(tmpSock);
recv(tmpSock,buffer,strlen(buffer),0);
hope that will help

---

wat does the last second line do?

recv(tmp_Sock,buffer,nbrByte);
the last line put in the buffer the data sent by the client sock it reads only the first nbrByte of this data