IEnumerable <StunResult> QueryByServers()
{
// 如果是被屏蔽，很有可能是因为服务器没有响应，可以通过轮换服务器来测试
StunResult result = null;
foreach (var item in Servers)
{
WriteLog("使用服务器：{0}", item);
//Int32 p = item.IndexOf(":");
//if (p > 0)
// result = QueryWithServer(item.Substring(0, p), Int32.Parse(item.Substring(p + 1)));
//else
// result = QueryWithServer(item, 3478);
var ep = NetHelper.ParseEndPoint(item, 3478);
try
{
result = QueryWithServer(ep.Address, ep.Port);
}
catch { result = null; }
yield return(result);
}
}
/// <summary>确保建立服务器</summary>
public override void EnsureCreateServer()
{
if (Servers.Count <= 0)
{
// 同时两个端口
AddServer(IPAddress.Any, Port, ProtocolType.Unknown, AddressFamily.InterNetwork);
AddServer(IPAddress.Any, Port2, ProtocolType.Unknown, AddressFamily.InterNetwork);
var dic = new Dictionary <Int32, IPEndPoint>();
IPEndPoint ep = null;
var pub = NetHelper.MyIP();
StunResult rs = null;
WriteLog("获取公网地址……");
foreach (var item in Servers)
{
if (item.Local.ProtocolType == ProtocolType.Tcp)
{
continue;
}
// 查询公网地址和网络类型，如果是受限网络，或者对称网络，则采用本地端口，因此此时只能依赖端口映射，将来这里可以考虑操作UPnP
if (rs == null)
{
item.Start();
rs = new StunClient(item).Query();
if (rs != null)
{
if (rs != null && rs.Type == StunNetType.Blocked && rs.Public != null)
{
rs.Type = StunNetType.Symmetric;
}
WriteLog("网络类型：{0} {1}", rs.Type, rs.Type.GetDescription());
ep = rs.Public;
if (ep != null)
{
pub = ep.Address;
}
}
}
else
{
ep = new StunClient(item).GetPublic();
}
if (rs != null && rs.Type > StunNetType.AddressRestrictedCone)
{
ep = new IPEndPoint(pub, item.Port);
}
WriteLog("{0}的公网地址：{1}", item.Local, ep);
dic.Add(item.Port, ep);
}
// Tcp没办法获取公网地址，只能通过Udp获取到的公网地址加上端口形成，所以如果要使用Tcp，服务器必须拥有独立公网地址
foreach (var item in Servers)
{
if (item.Local.ProtocolType != ProtocolType.Tcp)
{
continue;
}
ep = new IPEndPoint(pub, item.Port);
WriteLog("{0}的公网地址：{1}", item.Local, ep);
dic.Add(item.Port + 100000, ep);
}
//var ep = StunClient.GetPublic(Port, 2000);
//WriteLog("端口{0}的公网地址：{1}", Port, ep);
//dic.Add(Port, ep);
//ep = StunClient.GetPublic(Port2, 2000);
//WriteLog("端口{0}的公网地址：{1}", Port2, ep);
//dic.Add(Port2, ep);
WriteLog("成功获取公网地址！");
Public = dic;
}
}
