From 88486552350ecc0016eecba03813379a38628edc Mon Sep 17 00:00:00 2001
From: Klaus Basan <klaus.basan@klausbasan.de>
Date: Fri, 14 Mar 2014 01:55:06 +0100
Subject: [PATCH] refs #185 , added checks for IPs

---
 src/blackmisc/networkchecks.cpp | 31 +++++++++++++++++++++++++++++++
 src/blackmisc/networkchecks.h   |  9 +++++++++
 2 files changed, 40 insertions(+)

diff --git a/src/blackmisc/networkchecks.cpp b/src/blackmisc/networkchecks.cpp
index 81601b53e..5be9a99d4 100644
--- a/src/blackmisc/networkchecks.cpp
+++ b/src/blackmisc/networkchecks.cpp
@@ -7,6 +7,8 @@
 #include <QtNetwork/QNetworkInterface>
 #include <QtNetwork/QTcpSocket>
 #include <QCoreApplication>
+#include <QHostAddress>
+#include <QAbstractSocket>
 
 namespace BlackMisc
 {
@@ -82,4 +84,33 @@ namespace BlackMisc
     {
         return CNetworkChecks::canConnect(server.getAddress(), server.getPort(), message, timeoutMs);
     }
+
+    /*
+     * Valid IPv4 address
+     */
+    bool CNetworkChecks::isValidIPv4Address(const QString &candidate)
+    {
+        QHostAddress address(candidate);
+        return (QAbstractSocket::IPv4Protocol == address.protocol());
+    }
+
+    /*
+     * Valid IPv6 address
+     */
+    bool CNetworkChecks::isValidIPv6Address(const QString &candidate)
+    {
+        QHostAddress address(candidate);
+        return (QAbstractSocket::IPv6Protocol == address.protocol());
+    }
+
+    /*
+     * Valid port?
+     */
+    bool CNetworkChecks::isValidPort(const QString &port)
+    {
+        bool success;
+        int p = port.toInt(&success);
+        if (!success) return false;
+        return (p >= 1 && p <= 65535);
+    }
 } // namespace
diff --git a/src/blackmisc/networkchecks.h b/src/blackmisc/networkchecks.h
index c4d3c6f16..422b64384 100644
--- a/src/blackmisc/networkchecks.h
+++ b/src/blackmisc/networkchecks.h
@@ -50,6 +50,15 @@ namespace BlackMisc
          */
         static bool canConnect(const BlackMisc::Network::CServer &server, QString &message, int timeoutMs = 1500);
 
+        //! \brief Valid IPv4 address
+        static bool isValidIPv4Address(const QString &candidate);
+
+        //! \brief Valid IPv6 address
+        static bool isValidIPv6Address(const QString &candidate);
+
+        //! \brief Valid port
+        static bool isValidPort(const QString &port);
+
     };
 } // namespace