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Top Forums Programming can client connect() when server in sleep(300); after listen(fd,5); Post 24810 by chenhao_no1 on Thursday 18th of July 2002 01:49:42 AM
Old 07-18-2002
Client can connect() the Sleeping Server successful

1 . with regards to Perderabo and thanks to everyone who read the post
2 . I do a experiment :
Server call socket() bind() listern() in sequence , and call sleep(30) behind listen and before I call accept() .When the Server is in sleep ,the Client connect() the sleeping Server sucessful and send a lot of appointed data to the sleeping Server ,and then block because the recvive buffer of Server has been full(the Server is asleep)
3 . I refer to <<Unix Network Programming >> volume 1 (author : W.Richard Stevens) later .
I found that accept() only "return the next completed connection from the front of the completed connection queue) .the listen() function do "......... , Data that arrives after the three-way handshake completes,but before the server call accept(),should be queued by the server TCP,up to the size of connected socket's receive buffer"
4 . Then I think that : IN SERVER side , after we call listen() ,the Server application register an appointed socket to the kernel ,then the kernel will monitor the appointed port number and wait for the Client to connect .
Then another question arise :
5 . How does the kernel monitor the appointed port when the Server application do other thing(ie. call sleep() after listen() or not occupy the processor at that point) and
6 . How doese the kernel to notify which process that the data came if many Server application let the kernel to monitory different port
 

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Net::Server::Proto::TCP(3pm)				User Contributed Perl Documentation			      Net::Server::Proto::TCP(3pm)

NAME
Net::Server::Proto::TCP - Net::Server TCP protocol. SYNOPSIS
See Net::Server::Proto. DESCRIPTION
Protocol module for Net::Server. This module implements the SOCK_STREAM socket type under INET (also known as TCP). See Net::Server::Proto. PARAMETERS
There are no additional parameters that can be specified. See Net::Server for more information on reading arguments. INTERNAL METHODS
"object" Returns an object with parameters suitable for eventual creation of a IO::Socket::INET object listining on UDP. "log_connect" Called before binding the socket to provide useful information to the logs. "connect" Called when actually binding the port. Handles default parameters before calling parent method. "reconnect" Called instead of connect method during a server hup. "accept" Override of the parent class to make sure necessary parameters are passed down to client sockets. "poll_cb" Allow for psgi compatible interface during HTTP server. "read_until" Takes a regular expression, reads from the socket until the regular expression is matched. "hup_string" Returns a unique identifier that can be passed to the re-exec'ed process during HUP. "show" Basic dumper of properties stored in the glob. "AUTOLOAD" Handle accessor methods. LICENCE
Distributed under the same terms as Net::Server perl v5.14.2 2013-11-28 Net::Server::Proto::TCP(3pm)
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