/// <summary>
        /// Retrieves an enumerable collection of th XMPP client's external IP
        /// addresses.
        /// </summary>
        /// <returns>An enumerable collection of the XMPP client's external IP
        /// addresses.</returns>
        /// <exception cref="NotSupportedException">The external IP address(es)
        /// could not be determined.</exception>
        /// <remarks>In simple configurations this should usually yield one external
        /// IP address only.</remarks>
        private async Task <IEnumerable <IPAddress> > GetExternalAddresses()
        {
            // Use a set so we don't get duplicate addresses.
            ISet <IPAddress> set = new HashSet <IPAddress>();

            try
            {
                set.Add(await serverIpCheck.GetExternalAddress());
            }
            catch
            {
                // Fall through if server does not support the 'Server IP Check' extension.
            }
            // Next, try to retrieve external IP addresses from UPnP-enabled devices.
            if (UseUPnP)
            {
                throw new NotImplementedException(".net Core version doesn't support UPnP");
            }
            // Finally, perform a STUN query.
            try
            {
                set.Add(await StunClient.Query(StunServer.Host, StunServer.Port, 3000));
            }
            catch
            {
                // Nothing to do here.
            }
            // See if we could gather any external addresses at all.
            if (set.Count == 0)
            {
                throw new NotSupportedException("The external IP address(es) could not " +
                                                "be obtained.");
            }
            return(set);
        }
Ejemplo n.º 2
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        /// <summary>
        /// Retrieves an enumerable collection of th XMPP client's external IP
        /// addresses.
        /// </summary>
        /// <returns>An enumerable collection of the XMPP client's external IP
        /// addresses.</returns>
        /// <exception cref="NotSupportedException">The external IP address(es)
        /// could not be determined.</exception>
        /// <remarks>In simple configurations this should usually yield one external
        /// IP address only.</remarks>
        private IEnumerable <IPAddress> GetExternalAddresses()
        {
            // Use a set so we don't get duplicate addresses.
            ISet <IPAddress> set = new HashSet <IPAddress>();

            try
            {
                set.Add(serverIpCheck.GetExternalAddress());
            }
            catch
            {
                // Fall through if server does not support the 'Server IP Check' extension.
            }
            // Next, try to retrieve external IP addresses from UPnP-enabled devices.
            if (UseUPnP)
            {
#if WINDOWSPLATFORM
                try {
                    foreach (var address in UPnP.GetExternalAddresses())
                    {
                        set.Add(address);
                    }
                } catch (Exception) {
                    // Fall through in case any device querying goes wrong.
                }
#endif
            }
            // Finally, perform a STUN query.
            try
            {
                set.Add(StunClient.Query(StunServer.Host, StunServer.Port, 3000));
            }
            catch
            {
                // Nothing to do here.
            }
            // See if we could gather any external addresses at all.
            if (set.Count == 0)
            {
                throw new NotSupportedException("The external IP address(es) could not " +
                                                "be obtained.");
            }
            return(set);
        }