From b6bff92ee531929ac3fb2082042a27b9b56e51d7 Mon Sep 17 00:00:00 2001
From: Wolfgang Bumiller <w.bumiller@proxmox.com>
Date: Wed, 26 Aug 2015 10:38:27 +0200
Subject: [PATCH] Added PVE::Network::tcp_ping to replace Net::Ping

We use Net::Ping twice in pve-storage (once for ISCSIPlugin
and once in GlusterfsPlugin, both with the 'tcp' variant.),
but Net::Ping doesn't support IPv6.
---
 src/PVE/Network.pm | 30 ++++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)

diff --git a/src/PVE/Network.pm b/src/PVE/Network.pm
index ff4a89c..60afe50 100644
--- a/src/PVE/Network.pm
+++ b/src/PVE/Network.pm
@@ -6,6 +6,8 @@ use PVE::Tools qw(run_command);
 use PVE::ProcFSTools;
 use PVE::INotify;
 use File::Basename;
+use IO::Socket::IP;
+use POSIX qw(ECONNREFUSED);
 
 # host network related utility functions
 
@@ -437,4 +439,32 @@ sub activate_bridge_vlan {
     return $bridgevlan;
 }
 
+sub tcp_ping {
+    my ($host, $port, $timeout) = @_;
+
+    my $refused = 1;
+
+    $timeout = 3 if !$timeout; # sane default
+    if (!$port) {
+	# Net::Ping defaults to the echo port
+	$port = 7;
+    } else {
+	# Net::Ping's port_number() implies service_check(1)
+	$refused = 0;
+    }
+
+    my ($sock, $result);
+    eval {
+	$result = PVE::Tools::run_with_timeout($timeout, sub {
+	    $sock = IO::Socket::IP->new(PeerHost => $host, PeerPort => $port, Type => SOCK_STREAM);
+	    $result = $refused if $! == ECONNREFUSED;
+	});
+    };
+    if ($sock) {
+	$sock->close();
+	$result = 1;
+    }
+    return $result;
+}
+
 1;
-- 
2.39.2