public static void RemoveProxy(SSHProxy proxy)
{
Initialize();
lock (_lock)
{
_proxies.Remove(proxy);
}
}
private static void UseProxy(SSHProxy proxy, Action <SSHProxy> action)
{
try
{
action(proxy);
}
catch
{
throw;
}
finally
{
proxy.EndUse();
}
}
public static bool TryUseProxy(string server, int port, string sshServer, int sshPort, SshProxyCredentials credentials, Action <SSHProxy> action, out string error)
{
error = null;
Initialize();
SSHProxy proxy = null;
if (TryAcquireExistingProxy(server, port, out proxy))
{
UseProxy(proxy, action);
return(true);
}
else
{
proxy = new SSHProxy(server, port, sshServer, sshPort, credentials);
lock (_lock)
{
_proxies.Add(proxy);
}
Task.Run(() => proxy.Run());
proxy.WaitUntilStarted();
if (proxy.RequestUse())
{
UseProxy(proxy, action);
return(true);
}
else
{
error = proxy.Error;
return(false);
}
}
}
private static bool TryAcquireExistingProxy(string server, int port, out SSHProxy proxy)
{
proxy = null;
for (int i = 0; i < 4; i++)
{
lock (_lock)
{
// try to reuse an existing proxy
var validProxies = _proxies.Where(p => p.Server == server && p.Port == port).ToList();
foreach (var validProxy in validProxies)
{
if (validProxy.RequestUse())
{
proxy = validProxy;
return(true);
}
}
}
}
return(false);
}