Re: Socket recv?

Replies are listed 'Best First'.
Re^2: Socket recv? (!readline) by tye (Sage) on Mar 12, 2011 at 04:50 UTC
Please don't encourage people to use <> / readline on sockets. It is a great way to have things appear to lock up mysteriously (just because something arrived that didn't end in a newline character). It is a much better idea to read from a socket using read or sysread. - tye	[reply]
Re^3: Socket recv? (read vs sysread) by ikegami (Patriarch) on Mar 12, 2011 at 08:09 UTC
`read` will block until the requested number of characters has arrived (if possible). (Not sure how that's different than `readline`.) `select` cannot be used in conjunction with `read`. `sysread` will block until data is present and return whatever data is present (up to the specified amount). `sysread` and `select` can work in concert.	[reply] [d/l] [select]
Re^2: Socket recv? by packetstormer (Monk) on Mar 11, 2011 at 21:00 UTC
Like this? `....... print "\nEnter a string to send to SIP: "; $string=<STDIN>; chomp($string); print $socket $string; #$socket->send($string."\n"); #$socket->recv($data,1024); #print $data; print <$socket>;` [download] Its the same result!	[reply] [d/l]
Re^3: Socket recv? by Corion (Patriarch) on Mar 11, 2011 at 21:24 UTC
I don't know - I would imagine that you will need to look at what gets send over the wire to know what your server responds. Also look at Net::SIP if you're actually doing SIP.	[reply]
Re^4: Socket recv? by packetstormer (Monk) on Mar 11, 2011 at 22:18 UTC
The SIP is a TLA for the server name not the SIP protocol!! I am using strict in my code, I should have posted that too. What do you mean checking return values, I thought that is what I am doing print the recv value? And I am not sure what you mean by closing the socket. I am not closing the socket, as far as I can see!	[reply]
Re^5: Socket recv? by Illuminatus (Curate) on Mar 11, 2011 at 23:57 UTC
Re^2: Socket recv? by ikegami (Patriarch) on Mar 11, 2011 at 22:06 UTC
They can be used with TCP, but I don't think there are any benefits to doing so.	[reply]
Re^2: Socket recv? by Illuminatus (Curate) on Mar 11, 2011 at 21:48 UTC
send and recv are calls that can only be used in a connected-state socket (ie TCP).	[reply]
Re^3: Socket recv? by ikegami (Patriarch) on Mar 11, 2011 at 22:02 UTC
You have to use `send` for unconnected sockets. Saying it can't be used for unconnected sockets is nonsense. The system would have no idea where to send the data to. Furthermore, UDP sockets can be connected. Connecting a UDP socket specifies the default host+port for sending, and it specifies the only host+port from which it will receive.	[reply] [d/l]