proxyudp-null
上传用户:sy_wanhua
上传日期:2013-07-25
资源大小:3048k
文件大小:4k
- #!/usr/bin/perl
- # ====================================================================
- # The Vovida Software License, Version 1.0
- #
- # Copyright (c) 2000 Vovida Networks, Inc. All rights reserved.
- #
- # Redistribution and use in source and binary forms, with or without
- # modification, are permitted provided that the following conditions
- # are met:
- #
- # 1. Redistributions of source code must retain the above copyright
- # notice, this list of conditions and the following disclaimer.
- #
- # 2. Redistributions in binary form must reproduce the above copyright
- # notice, this list of conditions and the following disclaimer in
- # the documentation and/or other materials provided with the
- # distribution.
- #
- # 3. The names "VOCAL", "Vovida Open Communication Application Library",
- # and "Vovida Open Communication Application Library (VOCAL)" must
- # not be used to endorse or promote products derived from this
- # software without prior written permission. For written
- # permission, please contact vocal@vovida.org.
- #
- # 4. Products derived from this software may not be called "VOCAL", nor
- # may "VOCAL" appear in their name, without prior written
- # permission of Vovida Networks, Inc.
- #
- # THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESSED OR IMPLIED
- # WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
- # OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, TITLE AND
- # NON-INFRINGEMENT ARE DISCLAIMED. IN NO EVENT SHALL VOVIDA
- # NETWORKS, INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT DAMAGES
- # IN EXCESS OF $1,000, NOR FOR ANY INDIRECT, INCIDENTAL, SPECIAL,
- # EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
- # PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
- # PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
- # OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
- # USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
- # DAMAGE.
- #
- # ====================================================================
- #
- # This software consists of voluntary contributions made by Vovida
- # Networks, Inc. and many individuals on behalf of Vovida Networks,
- # Inc. For more information on Vovida Networks, Inc., please see
- # <http://www.vovida.org/>.
- # this version of proxyudp is essentially a UDP black hole , like /dev/null
- use Socket;
- require "getopts.pl";
- &Getopts("i:");
- $interval = 10;
- if($opt_i) {
- $interval = $opt_i;
- }
- $src{"gateway"} = "2427";
- if ($ARGV[0]) {
- $src{"gateway"} = $ARGV[0];
- }
- foreach(sort keys %src) {
- $FROM{$_} = $_;
- &mksocket($src{$_}, $FROM{$_});
- }
- foreach(sort keys %dest) {
- $x = $_;
- ($host, $port) = split(/:/, $dest{$x});
- ($name,$aliases,$type,$len,$host_addr) = gethostbyname($host);
- $sockaddr = "S n a4 x8";
- $TO{$x} = pack($sockaddr, PF_INET, $port, $host_addr);
- print "TO: $x : $TO{$x}n";
- }
- sub mksocket {
- local($port, $socket) = @_;
-
- $sockaddr = "S n a4 x8";
- ($name,$aliases,$proto) = getprotobyname('udp');
- chomp($hostname = `hostname`);
- ($name,$aliases,$type,$len,$myaddr) = gethostbyname($hostname);
- $me = pack($sockaddr,PF_INET, $port, $myaddr);
-
- print "myaddr: $hostnamen";
- print "port: $portn";
-
- socket($socket, PF_INET, SOCK_DGRAM, $proto) || die $!;
- bind($socket , $me) || die "died with port $port $!";
-
- }
- $count = 0;
- $first_time = $last_time = time();
- while(1) {
- $rin = '';
- foreach(sort keys %FROM) {
- vec($rin, fileno($FROM{$_}), 1) = 1;
- }
- $this_time = time();
- if(($this_time - $last_time) > $interval) {
- print "", ($this_time - $first_time), " $countn";
- $last_time = $this_time;
- }
- if(select($rin, undef, undef, undef)) {
- @bits = split(//, unpack("b*", $rin));
- undef($data);
- undef($new_data);
- $flag = 0;
- foreach(sort keys %FROM) {
- if($flag == 0 && $bits[fileno($FROM{$_})]) {
- $target = $map{$FROM{$_}};
- $myfake = $fake{$_};
- $count++;
- # print "got $FROM{$_}, target $targetn";
- $data = "";
- $his_address = recv($FROM{$_}, $data, 60000, 0);
- $flag = 1;
- }
- }
- }
- }