我有一个关于Linux下Perl脚本的问题。它的主要目的是作为三个应用程序之间的中间人。它应该做到以下几点:
所有这些都应该尽可能快(每毫秒都很重要)。发送到UDP或TCP的文本不包含空格。不必支持同时连接多个TCP客户端,但这肯定是一个优势 :-)
以下是我的当前代码:
- 能够在
$udp_port
上等待UDP文本(不含空格) - 当接收到UDP文本时,将其转发到已连接的TCP客户端
$udp_port
上的下一个UDP数据包后就会超时。所以基本上每当我想重新连接TCP时,都必须重新启动应用程序。所有这些都应该尽可能快(每毫秒都很重要)。发送到UDP或TCP的文本不包含空格。不必支持同时连接多个TCP客户端,但这肯定是一个优势 :-)
以下是我的当前代码:
#!/usr/bin/perl
use strict;
use warnings;
use IO::Socket;
use Net::hostent;
use threads;
use threads::shared;
my $tcp_port = "10008"; # connection from TCP Client
my $udp_port = "2099"; # connection from Announcer
my $udp_password = ""; # password from Announcer
my $title = "Middle Man server version 0.1";
my $tcp_sock = IO::Socket::INET->new( Proto => 'tcp', LocalPort => $tcp_port, Listen => SOMAXCONN,Reuse => 1)|| die @!;
my $udp_sock = new IO::Socket::INET(LocalPort => $udp_port, Proto => "udp") || die @!;
my (@threads);
print "[$title]\n";
sub mySubTcp($)
{
my ($popup) = @_;
print "[TCP][CLIENT CONNECTED]\n";
while (my $answer = <$popup>)
{
chomp $answer;
my ($pass, $announce) = split ' ', $answer;
print $answer . '\n';
}
printf "[TCP][CLIENT DISCONNECTED]\n";
}
my $client = $tcp_sock->accept();
$client->autoflush(1);
my $thr = threads->new(\&mySubTcp, $client);
while ($udp_sock->recv(my $buf, 1024))
{
chomp $buf;
my $announce = $buf;
print "[ANNOUNCE] $announce [START]\n";
print $client $announce . "\n";
print "[ANNOUNCE] $announce [END]\n";
}
在尝试了几个不使用线程的建议后,我尝试了以下代码。问题是,即使我能够连接到TCP客户端,消息“尝试设置UDP\n”也从未显示。可能是我做错了什么。TCP客户端只是连接并等待服务器发送一些数据。UDP到达但未被接受。以下是代码:
#!/usr/bin/perl
use strict;
use warnings;
use IO::Socket;
use Net::hostent;
use threads;
use threads::shared;
my $tcp_port = "10008"; # connection from Tcp
my $udp_port = "2099"; # connection from Announcer
my $title = "Middle Man server version 0.2";
my $tcp_sock = IO::Socket::INET->new( Proto => 'tcp', LocalPort => $tcp_port, Listen => SOMAXCONN,Reuse => 1)|| die @!;
my (@threads);
print "[$title]\n";
for (;;)
{
my $open_socket = $tcp_sock->accept();
print "[TCP][CLIENT CONNECTED]\n";
while (my $input = <$open_socket>)
{
print "Trying to setup UDP\n";
my $udp_sock = new IO::Socket::INET(LocalPort => $udp_port, Proto => "udp") || die @!;
while ($udp_sock->recv(my $buf, 1024)) {
chomp $buf;
print "\[ANNOUNCER\] $buf \[START\]\n";
print $open_socket $buf . "\n";
print "\[ANNOUNCER\] $buf \[END\]\n";
}
print "Closing UDP\n";
close $udp_sock;
#chomp $input;
#print $input;
}
close $open_socket;
printf "[TCP][CLIENT DISCONNECTED]\n";
}