ipv6.diff

diff --git a/Makefile.PL b/Makefile.PL
index a543098..0215dc1 100644
--- a/Makefile.PL
+++ b/Makefile.PL
@@ -7,6 +7,7 @@ use ExtUtils::MakeMaker;
 
 # Pod::Simple 3.09 first shipped with Perl 5.11.2
 # Time::Local 1.2 first shipped with Perl 5.13.9
+# IO::Socket::IP 0.26 first shipped with Perl 5.19.8
 WriteMakefile(
   NAME         => 'Mojolicious',
   VERSION_FROM => 'lib/Mojolicious.pm',
@@ -24,7 +25,11 @@ WriteMakefile(
     },
     no_index => {directory => ['t']}
   },
-  PREREQ_PM => {'Pod::Simple' => '3.09', 'Time::Local' => '1.2'},
+  PREREQ_PM => {
+    'IO::Socket::IP' => '0.26',
+    'Pod::Simple'    => '3.09',
+    'Time::Local'    => '1.2'
+  },
   EXE_FILES => ['script/hypnotoad', 'script/mojo', 'script/morbo'],
   test => {TESTS => 't/*.t t/*/*.t'}
 );
diff --git a/README.md b/README.md
index d276a51..159de7c 100644
--- a/README.md
+++ b/README.md
@@ -18,7 +18,7 @@
       testing framework, static file server, first class Unicode support and
       much more for you to discover.
   * Very clean, portable and object-oriented pure-Perl API with no hidden
-    magic and no requirements besides Perl 5.18.0 (versions as old as 5.10.1
+    magic and no requirements besides Perl 5.20.0 (versions as old as 5.10.1
     can be used too, but may require additional CPAN modules to be installed)
   * Full stack HTTP and WebSocket client/server implementation with IPv6, TLS,
     SNI, IDNA, HTTP/SOCKS5 proxy, Comet (long polling), keep-alive, connection
diff --git a/lib/Mojo/IOLoop.pm b/lib/Mojo/IOLoop.pm
index 118bd05..dc9d3f6 100644
--- a/lib/Mojo/IOLoop.pm
+++ b/lib/Mojo/IOLoop.pm
@@ -324,12 +324,11 @@ right in, to make writing test servers as easy as possible
 convenience the C<PIPE> signal will be set to C<IGNORE> when L<Mojo::IOLoop>
 is loaded.
 
-For better scalability (epoll, kqueue) and to provide IPv6, SOCKS5 as well as
-TLS support, the optional modules L<EV> (4.0+), L<IO::Socket::IP> (0.20+),
-L<IO::Socket::Socks> (0.64+) and L<IO::Socket::SSL> (1.84+) will be used
-automatically if they are installed. Individual features can also be disabled
-with the C<MOJO_NO_IPV6>, C<MOJO_NO_SOCKS> and C<MOJO_NO_TLS> environment
-variables.
+For better scalability (epoll, kqueue) and to provide SOCKS5 as well as TLS
+support, the optional modules L<EV> (4.0+), L<IO::Socket::Socks> (0.64+) and
+L<IO::Socket::SSL> (1.84+) will be used automatically if they are installed.
+Individual features can also be disabled with the C<MOJO_NO_SOCKS> and
+C<MOJO_NO_TLS> environment variables.
 
 See L<Mojolicious::Guides::Cookbook/"REAL-TIME WEB"> for more.
 
diff --git a/lib/Mojo/IOLoop/Client.pm b/lib/Mojo/IOLoop/Client.pm
index 6163edb..626a29d 100644
--- a/lib/Mojo/IOLoop/Client.pm
+++ b/lib/Mojo/IOLoop/Client.pm
@@ -2,16 +2,11 @@ package Mojo::IOLoop::Client;
 use Mojo::Base 'Mojo::EventEmitter';
 
 use Errno 'EINPROGRESS';
-use IO::Socket::INET;
+use IO::Socket::IP;
 use Mojo::IOLoop;
 use Scalar::Util 'weaken';
 use Socket qw(IPPROTO_TCP TCP_NODELAY);
 
-# IPv6 support requires IO::Socket::IP
-use constant IPV6 => $ENV{MOJO_NO_IPV6}
-  ? 0
-  : eval 'use IO::Socket::IP 0.20 (); 1';
-
 # TLS support requires IO::Socket::SSL
 use constant TLS => $ENV{MOJO_NO_TLS}
   ? 0
@@ -59,9 +54,8 @@ sub _connect {
     );
     $options{LocalAddr} = $args->{local_address} if $args->{local_address};
     $options{PeerAddr} =~ s/[\[\]]//g if $options{PeerAddr};
-    my $class = IPV6 ? 'IO::Socket::IP' : 'IO::Socket::INET';
     return $self->emit(error => "Can't connect: $@")
-      unless $self->{handle} = $handle = $class->new(%options);
+      unless $self->{handle} = $handle = IO::Socket::IP->new(%options);
   }
   $handle->blocking(0);
 
@@ -244,7 +238,7 @@ implements the following new ones.
   $client->connect(address => '127.0.0.1', port => 3000);
 
 Open a socket connection to a remote host. Note that TLS support depends on
-L<IO::Socket::SSL> (1.84+) and IPv6 support on L<IO::Socket::IP> (0.20+).
+L<IO::Socket::SSL> (1.84+).
 
 These options are currently available:
 
diff --git a/lib/Mojo/IOLoop/Server.pm b/lib/Mojo/IOLoop/Server.pm
index fc5c9ad..26a2d11 100644
--- a/lib/Mojo/IOLoop/Server.pm
+++ b/lib/Mojo/IOLoop/Server.pm
@@ -4,16 +4,11 @@ use Mojo::Base 'Mojo::EventEmitter';
 use Carp 'croak';
 use File::Basename 'dirname';
 use File::Spec::Functions 'catfile';
-use IO::Socket::INET;
+use IO::Socket::IP;
 use Mojo::IOLoop;
 use Scalar::Util 'weaken';
 use Socket qw(IPPROTO_TCP TCP_NODELAY);
 
-# IPv6 support requires IO::Socket::IP
-use constant IPV6 => $ENV{MOJO_NO_IPV6}
-  ? 0
-  : eval 'use IO::Socket::IP 0.20 (); 1';
-
 # TLS support requires IO::Socket::SSL
 use constant TLS => $ENV{MOJO_NO_TLS}
   ? 0
@@ -38,7 +33,7 @@ sub DESTROY {
 }
 
 sub generate_port {
-  IO::Socket::INET->new(Listen => 5, LocalAddr => '127.0.0.1')->sockport;
+  IO::Socket::IP->new(Listen => 5, LocalAddr => '127.0.0.1')->sockport;
 }
 
 sub handle { shift->{handle} }
@@ -59,9 +54,8 @@ sub listen {
 
   # Reuse file descriptor
   my $handle;
-  my $class = IPV6 ? 'IO::Socket::IP' : 'IO::Socket::INET';
   if (defined $fd) {
-    $handle = $class->new_from_fd($fd, 'r')
+    $handle = IO::Socket::IP->new_from_fd($fd, 'r')
       or croak "Can't open file descriptor $fd: $!";
   }
 
@@ -76,7 +70,8 @@ sub listen {
     );
     $options{LocalPort} = $port if $port;
     $options{LocalAddr} =~ s/[\[\]]//g;
-    $handle = $class->new(%options) or croak "Can't create listen socket: $@";
+    $handle = IO::Socket::IP->new(%options)
+      or croak "Can't create listen socket: $@";
     $fd = fileno $handle;
     my $reuse = $self->{reuse} = join ':', $address, $handle->sockport, $fd;
     $ENV{MOJO_REUSE} .= length $ENV{MOJO_REUSE} ? ",$reuse" : "$reuse";
@@ -238,7 +233,7 @@ Get handle for server.
   $server->listen(port => 3000);
 
 Create a new listen socket. Note that TLS support depends on
-L<IO::Socket::SSL> (1.84+) and IPv6 support on L<IO::Socket::IP> (0.20+).
+L<IO::Socket::SSL> (1.84+).
 
 These options are currently available:
 
diff --git a/lib/Mojo/Server/Daemon.pm b/lib/Mojo/Server/Daemon.pm
index 12f6a02..3b3563b 100644
--- a/lib/Mojo/Server/Daemon.pm
+++ b/lib/Mojo/Server/Daemon.pm
@@ -264,12 +264,11 @@ L<Mojo::Server::Daemon> is a full featured, highly portabl
 HTTP and WebSocket server, with IPv6, TLS, Comet (long polling), keep-alive
 and multiple event loop support.
 
-For better scalability (epoll, kqueue) and to provide IPv6, SOCKS5 as well as
-TLS support, the optional modules L<EV> (4.0+), L<IO::Socket::IP> (0.20+),
-L<IO::Socket::Socks> (0.64+) and L<IO::Socket::SSL> (1.84+) will be used
-automatically if they are installed. Individual features can also be disabled
-with the C<MOJO_NO_IPV6>, C<MOJO_NO_SOCKS> and C<MOJO_NO_TLS> environment
-variables.
+For better scalability (epoll, kqueue) and to provide SOCKS5 as well as TLS
+support, the optional modules L<EV> (4.0+), L<IO::Socket::Socks> (0.64+) and
+L<IO::Socket::SSL> (1.84+) will be used automatically if they are installed.
+Individual features can also be disabled with the C<MOJO_NO_SOCKS> and
+C<MOJO_NO_TLS> environment variables.
 
 See L<Mojolicious::Guides::Cookbook/"DEPLOYMENT"> for more.
 
diff --git a/lib/Mojo/Server/Hypnotoad.pm b/lib/Mojo/Server/Hypnotoad.pm
index 71119fc..acdf9e6 100644
--- a/lib/Mojo/Server/Hypnotoad.pm
+++ b/lib/Mojo/Server/Hypnotoad.pm
@@ -171,12 +171,11 @@ You can run the same command again for automatic hot deplo
 This second invocation will load the application again, detect the process id
 file with it, and send a L</"USR2"> signal to the already running server.
 
-For better scalability (epoll, kqueue) and to provide IPv6, SOCKS5 as well as
-TLS support, the optional modules L<EV> (4.0+), L<IO::Socket::IP> (0.20+),
-L<IO::Socket::Socks> (0.64+) and L<IO::Socket::SSL> (1.84+) will be used
-automatically if they are installed. Individual features can also be disabled
-with the C<MOJO_NO_IPV6>, C<MOJO_NO_SOCKS> and C<MOJO_NO_TLS> environment
-variables.
+For better scalability (epoll, kqueue) and to provide SOCKS5 as well as TLS
+support, the optional modules L<EV> (4.0+), L<IO::Socket::Socks> (0.64+) and
+L<IO::Socket::SSL> (1.84+) will be used automatically if they are installed.
+Individual features can also be disabled with the C<MOJO_NO_SOCKS> and
+C<MOJO_NO_TLS> environment variables.
 
 See L<Mojolicious::Guides::Cookbook/"DEPLOYMENT"> for more.
 
diff --git a/lib/Mojo/Server/Morbo.pm b/lib/Mojo/Server/Morbo.pm
index 967bdf9..d6bff18 100644
--- a/lib/Mojo/Server/Morbo.pm
+++ b/lib/Mojo/Server/Morbo.pm
@@ -130,12 +130,11 @@ To start applications with it you can use the L<morbo> scr
   $ morbo ./myapp.pl
   Server available at http://127.0.0.1:3000.
 
-For better scalability (epoll, kqueue) and to provide IPv6, SOCKS5 as well as
-TLS support, the optional modules L<EV> (4.0+), L<IO::Socket::IP> (0.20+),
-L<IO::Socket::Socks> (0.64+) and L<IO::Socket::SSL> (1.84+) will be used
-automatically if they are installed. Individual features can also be disabled
-with the C<MOJO_NO_IPV6>, C<MOJO_NO_SOCKS> and C<MOJO_NO_TLS> environment
-variables.
+For better scalability (epoll, kqueue) and to provide SOCKS5 as well as TLS
+support, the optional modules L<EV> (4.0+), L<IO::Socket::Socks> (0.64+) and
+L<IO::Socket::SSL> (1.84+) will be used automatically if they are installed.
+Individual features can also be disabled with the C<MOJO_NO_SOCKS> and
+C<MOJO_NO_TLS> environment variables.
 
 See L<Mojolicious::Guides::Cookbook/"DEPLOYMENT"> for more.
 
diff --git a/lib/Mojo/Server/Prefork.pm b/lib/Mojo/Server/Prefork.pm
index b9ffc9d..89a0343 100644
--- a/lib/Mojo/Server/Prefork.pm
+++ b/lib/Mojo/Server/Prefork.pm
@@ -261,12 +261,11 @@ keep-alive and multiple event loop support. Note that the 
 for process management, so you should avoid modifying signal handlers in your
 applications.
 
-For better scalability (epoll, kqueue) and to provide IPv6, SOCKS5 as well as
-TLS support, the optional modules L<EV> (4.0+), L<IO::Socket::IP> (0.20+),
-L<IO::Socket::Socks> (0.64+) and L<IO::Socket::SSL> (1.84+) will be used
-automatically if they are installed. Individual features can also be disabled
-with the C<MOJO_NO_IPV6>, C<MOJO_NO_SOCKS> and C<MOJO_NO_TLS> environment
-variables.
+For better scalability (epoll, kqueue) and to provide SOCKS5 as well as TLS
+support, the optional modules L<EV> (4.0+), L<IO::Socket::Socks> (0.64+) and
+L<IO::Socket::SSL> (1.84+) will be used automatically if they are installed.
+Individual features can also be disabled with the C<MOJO_NO_SOCKS> and
+C<MOJO_NO_TLS> environment variables.
 
 See L<Mojolicious::Guides::Cookbook/"DEPLOYMENT"> for more.
 
diff --git a/lib/Mojo/UserAgent.pm b/lib/Mojo/UserAgent.pm
index 190b733..38e9e10 100644
--- a/lib/Mojo/UserAgent.pm
+++ b/lib/Mojo/UserAgent.pm
@@ -440,12 +440,11 @@ All connections will be reset automatically if a new proce
 this allows multiple processes to share the same L<Mojo::UserAgent> object
 safely.
 
-For better scalability (epoll, kqueue) and to provide IPv6, SOCKS5 as well as
-TLS support, the optional modules L<EV> (4.0+), L<IO::Socket::IP> (0.20+),
-L<IO::Socket::Socks> (0.64+) and L<IO::Socket::SSL> (1.84+) will be used
-automatically if they are installed. Individual features can also be disabled
-with the C<MOJO_NO_IPV6>, C<MOJO_NO_SOCKS> and C<MOJO_NO_TLS> environment
-variables.
+For better scalability (epoll, kqueue) and to provide SOCKS5 as well as TLS
+support, the optional modules L<EV> (4.0+), L<IO::Socket::Socks> (0.64+) and
+L<IO::Socket::SSL> (1.84+) will be used automatically if they are installed.
+Individual features can also be disabled with the C<MOJO_NO_SOCKS> and
+C<MOJO_NO_TLS> environment variables.
 
 See L<Mojolicious::Guides::Cookbook/"USER AGENT"> for more.
 
diff --git a/lib/Mojolicious/Command/version.pm b/lib/Mojolicious/Command/versio
index 4bdd363..cf68172 100644
--- a/lib/Mojolicious/Command/version.pm
+++ b/lib/Mojolicious/Command/version.pm
@@ -13,7 +13,6 @@ sub run {
 
   my $ev    = eval 'use Mojo::Reactor::EV; 1' ? $EV::VERSION : 'not installed';
   my $class = 'Mojo::IOLoop::Client';
-  my $ipv6  = $class->IPV6 ? $IO::Socket::IP::VERSION : 'not installed';
   my $socks = $class->SOCKS ? $IO::Socket::Socks::VERSION : 'not installed';
   my $tls   = $class->TLS ? $IO::Socket::SSL::VERSION : 'not installed';
 
@@ -24,7 +23,6 @@ CORE
 
 OPTIONAL
   EV 4.0+                 ($ev)
-  IO::Socket::IP 0.20+    ($ipv6)
   IO::Socket::Socks 0.64+ ($socks)
   IO::Socket::SSL 1.84+   ($tls)
 
diff --git a/lib/Mojolicious/Guides/FAQ.pod b/lib/Mojolicious/Guides/FAQ.pod
index a9b028d..9d3d590 100644
--- a/lib/Mojolicious/Guides/FAQ.pod
+++ b/lib/Mojolicious/Guides/FAQ.pod
@@ -34,9 +34,8 @@ without compromises. While there are no rules in
 L<Mojolicious::Guides::Contributing> that forbid dependencies, we do currently
 discourage adding non-optional ones in favor of a faster and more painless
 installation process. And we do in fact already use several optional CPAN
-modules such as L<EV>, L<IO::Socket::IP>, L<IO::Socket::Socks>,
-L<IO::Socket::SSL> and L<Plack> to provide advanced functionality if they are
-installed.
+modules such as L<EV>, L<IO::Socket::Socks>, L<IO::Socket::SSL> and L<Plack>
+to provide advanced functionality if they are installed.
 
 =head2 Why reinvent wheels?
 
diff --git a/t/mojo/ioloop_ipv6.t b/t/mojo/ioloop_ipv6.t
index 11be547..a589a41 100644
--- a/t/mojo/ioloop_ipv6.t
+++ b/t/mojo/ioloop_ipv6.t
@@ -7,8 +7,6 @@ use Mojo::IOLoop::Server;
 
 plan skip_all => 'set TEST_IPV6 to enable this test (developer only!)'
   unless $ENV{TEST_IPV6};
-plan skip_all => 'IO::Socket::IP 0.20 required for this test!'
-  unless Mojo::IOLoop::Server::IPV6;
 
 use Mojo::IOLoop;
 
diff --git a/t/mojo/user_agent_online.t b/t/mojo/user_agent_online.t
index 93df947..56a5802 100644
--- a/t/mojo/user_agent_online.t
+++ b/t/mojo/user_agent_online.t
@@ -10,8 +10,6 @@ use Mojo::IOLoop::Server;
 
 plan skip_all => 'set TEST_ONLINE to enable this test (developer only!)'
   unless $ENV{TEST_ONLINE};
-plan skip_all => 'IO::Socket::IP 0.20 required for this test!'
-  unless Mojo::IOLoop::Server::IPV6;
 plan skip_all => 'IO::Socket::SSL 1.84 required for this test!'
   unless Mojo::IOLoop::Server::TLS;
 
@@ -87,7 +85,7 @@ ok $tx->error,       'has error';
 $tx = $ua->build_tx(GET => 'http://cdeabcdeffoobarnonexisting.com');
 $ua->start($tx);
 ok $tx->is_finished, 'transaction is finished';
-like $tx->error->{message}, qr/^Can't connect/, 'right error';
+ok $tx->error,       'has error';
 
 # Fresh user agent again
 $ua = Mojo::UserAgent->new;
diff --git a/t/pod_coverage.t b/t/pod_coverage.t
index 50f8fcd..6beb9b4 100644
--- a/t/pod_coverage.t
+++ b/t/pod_coverage.t
@@ -14,4 +14,4 @@ my @tiger = (
 );
 
 # False positive constants
-all_pod_coverage_ok({also_private => [qw(IPV6 TLS), @tiger]});
+all_pod_coverage_ok({also_private => ['TLS', @tiger]});