perl Socket编程实例代码

#!/usr/bin/perl -w
# tcp_socket_cli.pl
use strict;
use Socket;
my $addr = $ARGV[0] || '127.0.0.1';
my $port = $ARGV[1] || '3000';
my $dest = sockaddr_in($port, inet_aton($addr));
my $buf = undef;
socket(SOCK,PF_INET,SOCK_STREAM,6) or die "Can't create socket: $!";
connect(SOCK,$dest)                or die "Can't connect: $!";
my $bs = sysread(SOCK, $buf, 2048); # try to read 2048
print "Received $bs bytes, content $buf\n"; # actually get $bs bytes
close SOCK;

#!/usr/bin/perl -w
# tcp_socket_dt_srv.pl
use strict;
use Socket;
use IO::Handle;
use POSIX qw(WNOHANG);
my $port     = $ARGV[0] || '3000';
my $proto    = getprotobyname('tcp');
$SIG{'CHLD'} = sub {
     while((my $pid = waitpid(-1, WNOHANG)) >0) {
          print "Reaped child $pid\n";
      }
};
socket(SOCK, AF_INET, SOCK_STREAM, getprotobyname('tcp'))
    or die "socket() failed: $!";
setsockopt(SOCK,SOL_SOCKET,SO_REUSEADDR,1)
    or die "Can't set SO_REUSADDR: $!" ;
my $my_addr = sockaddr_in($port,INADDR_ANY);
bind(SOCK,$my_addr)    or die "bind() failed: $!";
listen(SOCK,SOMAXCONN) or die "listen() failed: $!";
warn "Starting server on port $port...\n";
while (1) {
     next unless my $remote_addr = accept(SESSION,SOCK);
     defined(my $pid=fork) or die "Can't fork: $!\n";

     if($pid==0) {
          my ($port,$hisaddr) = sockaddr_in($remote_addr);
          warn "Connection from [",inet_ntoa($hisaddr),",$port]\n";
          SESSION->autoflush(1);
          print SESSION (my $s = localtime);
          warn "Connection from [",inet_ntoa($hisaddr),",$port] finished\n";
          close SESSION;
          exit 0;
      }else {
          print "Forking child $pid\n";
      }
}
close SOCK;

#!/usr/bin/perl -w
# tcp_iosocket_cli.pl
use strict;
use IO::Socket;
my $addr = $ARGV[0] || '127.0.0.1';
my $port = $ARGV[1] || '3000';
my $buf = undef;
my $sock = IO::Socket::INET->new(
        PeerAddr => $addr,
        PeerPort => $port,
        Proto    => 'tcp')
    or die "Can't connect: $!\n";
$buf = <$sock>;
my $bs = length($buf);
print "Received $bs bytes, content $buf\n"; # actually get $bs bytes
close $sock;

#!/usr/bin/perl
# tcp_iosocket_dt_srv.pl
use strict;
use IO::Socket;
use POSIX qw(WNOHANG);
$SIG = sub {
     while((my $pid = waitpid(-1, WNOHANG)) >0) {
          print "Reaped child $pid\n";
      }
};
my $port     = $ARGV[0] || '3000';
my $sock = IO::Socket::INET->new( Listen    => 20,
                                  LocalPort => $port,
                                  Timeout   => 60*1,
                                  Reuse     => 1)
  or die "Can't create listening socket: $!\n";
warn "Starting server on port $port...\n";
while (1) {
     next unless my $session = $sock->accept;
     defined (my $pid = fork) or die "Can't fork: $!\n";

     if($pid == 0) {
          my $peer = gethostbyaddr($session->peeraddr,AF_INET) || $session->peerhost;
          my $port = $session->peerport;
          warn "Connection from [$peer,$port]\n";
          $session->autoflush(1);
          print $session (my $s = localtime), "\n";
          warn "Connection from [$peer,$port] finished\n";
          close $session;
          exit 0;
      }else {
          print "Forking child $pid\n";
      }
}
close $sock;

#!/usr/bin/perl -w
use strict;
use Socket;
use IO::Handle;
my $path = $ARGV[0] || '/tmp/daytime.sock';
socket(my $sock, PF_UNIX, SOCK_STREAM, 0);
my $sun = sockaddr_un($path);
connect($sock, $sun) or die "Connect: $!\n";
$sock->autoflush(1);
my $buf = <$sock>;
my $bs = length($buf);
print "Received $bs bytes, content $buf\n";
close $sock;

#!/usr/bin/perl -w
# tcp_socket_dt_srv.pl
use strict;
use Socket;
use IO::Handle;
use POSIX qw(WNOHANG);
my $path     = $ARGV[0] || '/tmp/daytime.sock';
$SIG{'CHLD'} = sub {
      while((my $pid = waitpid(-1, WNOHANG)) >0) {
            print "Reaped child $pid\n";
        }
};
socket(SOCK, PF_UNIX, SOCK_STREAM, 0)
    or die "socket() failed: $!";
setsockopt(SOCK,SOL_SOCKET,SO_REUSEADDR,1)
    or die "Can't set SO_REUSADDR: $!" ;
unlink $path if -r $path;
bind(SOCK,sockaddr_un($path))    or die "bind() failed: $!";
listen(SOCK,SOMAXCONN)           or die "listen() failed: $!";
warn "Starting server on path $path...\n";
while (1) {
      next unless my $sockname = accept(SESSION,SOCK);
      defined (my $pid=fork) or die "Can't fork: $!\n";

      if($pid==0) {
          SESSION->autoflush(1);
          print SESSION (my $s = localtime);
          close SESSION;
          exit 0;
       }else {
          print "Forking child $pid\n";
       }
}
close SOCK;