Re: sockets

No, your problem is most likely that you didn't do anything with the telnet negotiation phase. Read the RFC on telnet, and you will find that there is a whole client-server negotiation phase going on. Kinda like a modem handshake. It is really quite difficult, and no one has ported a Telnet class to PHP yet. (big big task) There is a Net::Telnet class in perl that I ended up using to write a script to do something similar, and pass results back to the php script that called it. Telnet is simply not as easy as opening a socket. If you don't send the right set of characters as the first block, it won't work. On 4/9/01 10:16 AM, "Matthias Winkelmann" <winkelmann@someon.com> wrote: > Hi! > > I'm trying to speed up a big application by splitting it into a codebase > acting as a server and the actual scripts communicating with the server > using sockets. > > I got the server working, at least it works when I send a request via > telnet. When I try to let a script act as the client I get no response. I > think the problem is the length parameter in the read()-function. > Not all requests and results are 2048 bytes, but I have no idea what to use > as a delimiter instead. > Here are the scripts so far: > > Server: > > // Socket was created, bind & listen executed > do { > if (($msgsock = accept_connect($sock)) < 0) { // wait for request > echo "accept_connect() failed: reason: " . strerror ($msgsock) . > "\n"; > break; > } > do { > $buf = ''; > $ret = read ($msgsock, $buf, 2048); // read request > echo "request: $ret <br>"; > if ($ret < 0) { > echo "read() failed: reason: " . strerror ($ret) . "\n"; > break 2; > } > if ($ret == 0) { > break 2; > } > $buf = trim ($buf); > > $talkback = eval($buf); // > request verabeiten > write ($msgsock, $talkback, strlen ($talkback)); // write result to > socket > echo "$buf\n"; > } while (true); > close ($msgsock); > } while (true); > > > > Client: > > > // Socket was created; submitting request > > write ($socket, $in, strlen ($in)); > while (read ($socket, $out, 2048)) // reading response. what if > the response is < 2048 bytes? > { > echo $out; > } > > > As I said: The server works perfectly using telnet, but the script-client > does not give any output, allthough the connection was created successfully. > > Thanks in advance for any answers. I hope I was able to describe the problem > well enough. > > Matt >