server0.pl to HTML.

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Generated: Tue Feb 2 17:54:55 2010 from server0.pl 2005/05/05 1.7 KB.

#!/perl
# server0.pl 
#-------------------- 
use strict; 
use Socket; 
my $start_time = time();
# use port 7890 as default 
my $port = shift || 7890; 
my $proto = getprotobyname('tcp'); 
my $msg;
# create a socket, make it reusable 
print "SERVER: server0.pl starting at " . localtime($start_time) . " ...\n";
print "SERVER: Creating socket ...\n";
socket(SERVER, PF_INET, SOCK_STREAM, $proto) or die "socket: $!"; 
print "SERVER: Setting socket re-use ...\n";
setsockopt(SERVER, SOL_SOCKET, SO_REUSEADDR, 1) or die "setsock: $!"; 
# grab a port on this machine 
print "SERVER: grab an address, on this machine ... using port $port ...\n";
my $paddr = sockaddr_in($port, INADDR_ANY); 
# bind to a port, then listen 
print "SERVER: binding to $paddr, on port $port ...\n"; 
bind(SERVER, $paddr) or die "bind: $!"; 
print "SERVER: listen to $paddr, on port $port ...\n"; 
listen(SERVER, SOMAXCONN) or die "listen: $!"; 
print "SERVER: started on port $port ..\n"; 
# accepting a connection 
my $client_addr; 
print "SERVER: waiting for a connection ...\n";
while ($client_addr = accept(CLIENT, SERVER)) { 
   # find out who connected 
   my ($client_port, $client_ip) = sockaddr_in($client_addr); 
   my $client_ipnum = inet_ntoa($client_ip); 
   my $client_host = gethostbyaddr($client_ip, AF_INET); 
   # print who has connected 
   $msg = "SERVER: Got a connection from [$client_host]\n ipnum [$client_ipnum] port [$client_port] ip [$client_ip]";
   print "$msg\n";
   # send them a message, close connection 
   print "SERVER: Sending message to client ...\n";
   print CLIENT "Hello $msg -\n *** Smile from the server ***"; 
   print "SERVER: Closing CLIENT ...\n";
   close CLIENT;
   print "SERVER: waiting for a connection ...\n";
} 

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