Recv() return values

[kewlerkid3]

Hello,

This topic has been discussed multiple times but I'm still not understanding something about it.

So I'm receiving data from a source in different chunks and the buffer
I have deals with that nicely but then when all data is received it just
hangs.

My understanding was that recv returns with a -1 when there is no more
data to be read? Can someone help me out?

Thanks.

int leng = 1024;

while(leng!=0)
{   

  leng = recv(sockfd, buf, 1024-1, 0);
  
    if(leng == 0 || leng == WSAECONNRESET)
    {
       MessageBox(NULL,"Connection was closed~Exiting",NULL,0);
       exit(0);
    }
		
    if (leng < 0)
       break;
		
//Output Here

}