publicnathandler.cs

破解的飞信源代码

namespace NCindy.Protocol.RUDP.NATTraversal
{
    using System;
    using System.Collections.Generic;
    using System.Net;

    public sealed class PublicNATHandler : NATHandler
    {
        public override bool CanHandleNAT(List<NATHistoryPoint> history)
        {
            int num = 0;
            bool flag = false;
            bool flag2 = true;
            List<NATHistoryPoint>.Enumerator enumerator = history.GetEnumerator();
            try
            {
                while (enumerator.MoveNext())
                {
                    NATHistoryPoint point = enumerator.get_Current();
                    int port = point.LocalEndPoint.Port;
                    if (!flag)
                    {
                        num = port;
                        flag = true;
                    }
                    else
                    {
                        flag2 = flag2 && (port == num);
                    }
                    IPEndPoint peerViewOfLocalEndPoint = point.PeerViewOfLocalEndPoint;
                    if (peerViewOfLocalEndPoint != null)
                    {
                        flag2 = flag2 && (peerViewOfLocalEndPoint.Port == num);
                    }
                    if (!flag2)
                    {
                        return flag2;
                    }
                }
            }
            finally
            {
                enumerator.Dispose();
            }
            return flag2;
        }

        public override List<IPEndPoint> TargetEndPoints(List<NATHistoryPoint> history)
        {
            List<IPEndPoint> list = new List<IPEndPoint>();
            IPEndPoint localEndPoint = null;
            List<NATHistoryPoint>.Enumerator enumerator = history.GetEnumerator();
            try
            {
                while (enumerator.MoveNext())
                {
                    NATHistoryPoint point2 = enumerator.get_Current();
                    if (localEndPoint == null)
                    {
                        localEndPoint = point2.LocalEndPoint;
                    }
                    IPEndPoint peerViewOfLocalEndPoint = point2.PeerViewOfLocalEndPoint;
                    if (peerViewOfLocalEndPoint != null)
                    {
                        list.Add(peerViewOfLocalEndPoint);
                        goto Label_0050;
                    }
                }
            }
            finally
            {
                enumerator.Dispose();
            }
        Label_0050:
            if ((list.get_Count() == 0) && (localEndPoint != null))
            {
                list.Add(localEndPoint);
            }
            return list;
        }
    }
}