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" <[EMAIL PROTECTED]> 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
>
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