Adding upstream version 4.92.upstream/4.92upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 251 insertions, 0 deletions

diff --git a/util/proxy_protocol_client.pl b/util/proxy_protocol_client.pl
new file mode 100644
index 0000000..67a171d
--- /dev/null
+++ b/util/proxy_protocol_client.pl
@@ -0,0 +1,251 @@
+#!/usr/bin/perl
+#
+# Copyright (C) 2014 Todd Lyons
+# License GPLv2: GNU GPL version 2
+# <http://www.gnu.org/licenses/old-licenses/gpl-2.0.html>
+#
+# This script emulates a proxy which uses Proxy Protocol to communicate
+# to a backend server.  It should be run from an IP which is configured
+# to be a Proxy Protocol connection (or not, if you are testing error
+# scenarios) because Proxy Protocol specs require not to fall back to a
+# non-proxied mode.
+#
+# The script is interactive, so when you run it, you are expected to
+# perform whatever conversation is required for the protocol being
+# tested.  It uses STDIN/STDOUT, so you can also pipe output to/from the
+# script.  It was originally written to test Exim's Proxy Protocol
+# code, and it could be tested like this:
+#
+# swaks --pipe 'perl proxy_protocol_client.pl --server-ip
+#   host.internal.lan' --from user@example.com --to user@example.net
+#
+use strict;
+use warnings;
+BEGIN { pop @INC if $INC[-1] eq '.' };
+use IO::Select;
+use IO::Socket;
+use Getopt::Long;
+use Data::Dumper;
+
+my %opts;
+GetOptions( \%opts,
+  'help',
+  '6|ipv6',
+  'dest-ip:s',
+  'dest-port:i',
+  'source-ip:s',
+  'source-port:i',
+  'server-ip:s',
+  'server-port:i',
+  'version:i'
+);
+&usage() if ($opts{help} || !$opts{'server-ip'});
+
+my ($dest_ip,$source_ip,$dest_port,$source_port);
+my %socket_map;
+my $status_line = "Testing Proxy Protocol Version " .
+                  ($opts{version} ? $opts{version} : '2') .
+                  ":\n";
+
+# All ip's and ports are in network byte order in version 2 mode, but are
+# simple strings when in version 1 mode.  The binary_pack_*() functions
+# return the required data for the Proxy Protocol version being used.
+
+# Use provided source or fall back to www.mrball.net
+$source_ip   = $opts{'source-ip'} ?  binary_pack_ip($opts{'source-ip'}) :
+                 $opts{6} ?
+                 binary_pack_ip("2001:470:d:367::50") :
+                 binary_pack_ip("208.89.139.252");
+$source_port = $opts{'source-port'} ?
+                 binary_pack_port($opts{'source-port'}) :
+                 binary_pack_port(43118);
+
+$status_line .= "-> " if (!$opts{version} || $opts{version} == 2);
+
+# Use provided dest or fall back to mail.exim.org
+$dest_ip   = $opts{'dest-ip'} ?  binary_pack_ip($opts{'dest-ip'}) :
+               $opts{6} ?
+               binary_pack_ip("2001:630:212:8:204:23ff:fed6:b664") :
+               binary_pack_ip("131.111.8.192");
+$dest_port = $opts{'dest-port'} ?
+               binary_pack_port($opts{'dest-port'}) :
+               binary_pack_port(25);
+
+# The IP and port of the Proxy Protocol backend real server being tested,
+# don't binary pack it.
+my $server_ip   = $opts{'server-ip'};
+my $server_port = $opts{'server-port'} ? $opts{'server-port'} : 25;
+
+my $s = IO::Select->new(); # for socket polling
+
+sub generate_preamble {
+  my @preamble;
+  if (!$opts{version} || $opts{version} == 2) {
+    @preamble = (
+      "\x0D\x0A\x0D\x0A\x00\x0D\x0A\x51\x55\x49\x54\x0A", # 12 byte v2 header
+      "\x21",                                             # top 4 bits declares v2
+                                                          # bottom 4 bits is command
+      $opts{6} ? "\x21" : "\x11",                         # inet6/4 and TCP (stream)
+      $opts{6} ? "\x00\x24" : "\x00\x0b",                 # 36 bytes / 12 bytes
+      $source_ip,
+      $dest_ip,
+      $source_port,
+      $dest_port
+    );
+  }
+  else {
+    @preamble = (
+      "PROXY", " ",                                       # Request proxy mode
+      $opts{6} ? "TCP6" : "TCP4", " ",                    # inet6/4 and TCP (stream)
+      $source_ip, " ",                                    
+      $dest_ip, " ",
+      $source_port, " ",
+      $dest_port,
+      "\x0d\x0a"
+    );
+    $status_line .= join "", @preamble;
+  }
+  print "\n", $status_line, "\n";
+  print "\n" if (!$opts{version} || $opts{version} == 2);
+  return @preamble;
+}
+
+sub binary_pack_port {
+  my $port = shift();
+  if ($opts{version} && $opts{version} == 1) {
+    return $port
+      if ($port && $port =~ /^\d+$/ && $port > 0 && $port < 65536);
+    die "Not a valid port: $port";
+  }
+  $status_line .= $port." ";
+  $port = pack "S", $port;
+  return $port;
+}
+
+sub binary_pack_ip {
+  my $ip = shift();
+  if ( $ip =~ m/\./ && !$opts{6}) {
+    if (IP4_valid($ip)) {
+      return $ip if ($opts{version} && $opts{version} == 1);
+      $status_line .= $ip.":";
+      $ip = pack "C*", split /\./, $ip;
+    }
+    else { die "Invalid IPv4: $ip"; }
+  }
+  elsif ($ip =~ m/:/ && $opts{6}) {
+    $ip = pad_ipv6($ip);
+    if (IP6_valid($ip)) {
+      return $ip if ($opts{version} && $opts{version} == 1);
+      $status_line .= $ip.":";
+      $ip = pack "S>*", map hex, split /:/, $ip;
+    }
+    else { die "Invalid IPv6: $ip"; }
+  }
+  else { die "Mismatching IP families passed: $ip"; }
+  return $ip;
+}
+
+sub pad_ipv6 {
+  my $ip = shift();
+  my @ip = split /:/, $ip;
+  my $segments = scalar @ip;
+  return $ip if ($segments == 8);
+  $ip = "";
+  for (my $count=1; $count <= $segments; $count++) {
+    my $block = $ip[$count-1];
+    if ($block) {
+      $ip .= $block;
+      $ip .= ":" unless $count == $segments;
+    }
+    elsif ($count == 1) {
+      # Somebody passed us ::1, fix it, but it's not really valid
+      $ip = "0:";
+    }
+    else {
+      $ip .= join ":", map "0", 0..(8-$segments);
+      $ip .= ":";
+    }
+  }
+  return $ip;
+}
+
+sub IP6_valid {
+  my $ip = shift;
+  $ip = lc($ip);
+  return 0 unless ($ip =~ /^[0-9a-f:]+$/);
+  my @ip = split /:/, $ip;
+  return 0 if (scalar @ip != 8);
+  return 1;
+}
+
+sub IP4_valid {
+  my $ip = shift;
+  $ip =~ /^(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})$/;
+  foreach ($1,$2,$3,$4){
+    if ($_  <256 && $_ >0) {next;}
+    return 0;
+  }
+  return 1;
+}
+
+sub go_interactive {
+  my $continue = 1;
+  while($continue) {
+    # Check for input on both ends, recheck every 5 sec
+    for my $socket ($s->can_read(5)) {
+      my $remote = $socket_map{$socket};
+      my $buffer;
+      my $read = $socket->sysread($buffer, 4096);
+      if ($read) {
+        $remote->syswrite($buffer);
+      }
+      else {
+        $continue = 0;
+      }
+    }
+  }
+}
+
+sub connect_stdin_to_proxy {
+  my $sock = new IO::Socket::INET(
+               PeerAddr => $server_ip,
+               PeerPort => $server_port,
+               Proto    => 'tcp'
+             );
+
+  die "Could not create socket: $!\n" unless $sock;
+  # Add sockets to the Select group
+  $s->add(\*STDIN);
+  $s->add($sock);
+  # Tie the sockets together using this hash
+  $socket_map{\*STDIN} = $sock;
+  $socket_map{$sock} = \*STDOUT;
+  return $sock;
+}
+
+sub usage {
+  chomp(my $prog = `basename $0`);
+  print <<EOF;
+Usage: $prog [required] [optional]
+  Required:
+    --server-ip   IP of server to test proxy configuration,
+                  a hostname is ok, but for only this setting
+  Optional:
+    --server-port Port server is listening on (default 25)
+    --6           IPv6 source/dest (default IPv4), if none specified,
+                  some default, reverse resolvable IP's are used for
+                  the source and dest ip/port
+    --dest-ip     Public IP of the proxy server
+    --dest-port   Port of public IP of proxy server
+    --source-ip   IP connecting to the proxy server
+    --source-port Port of IP connecting to the proxy server
+    --help        This output
+EOF
+  exit;
+}
+
+
+my $sock = connect_stdin_to_proxy();
+my @preamble = generate_preamble();
+print $sock @preamble;
+go_interactive();