我对 Linux 的 Perl 脚本有疑问。它的主要目的是成为 3 个应用程序之间的中间人。它应该做什么：
- 它应该能够等待 UDP 文本（不带空格）
$udp_port
- 当它收到 UDP 文本时，它应该将其转发到连接的 TCP 客户端
问题是我的应用程序目前可以正常工作，直到我第一次与 TCP 客户端断开连接。然后我无法再连接到它，并且在收到下一个 UDP 数据包后超时$udp_port。所以基本上每当我想重新连接 TCP 时我都必须重新启动应用程序。
所有这些都应该尽可能快（每一毫秒都很重要）。发送到 UDP 或 TCP 的文本不包含空格。没有必要能够同时支持多个 TCP 客户端，但这肯定是一个优势:-)
这是我当前的代码：
#!/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";
}
这是我在提出一些不使用线程的建议后尝试的代码。问题是即使你我能够连接 TCP 客户端消息“尝试设置 UDP\n 也不会显示。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 到达但它是不被接受。代码如下：
#!/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";
}
