protected override void OnStop()
{
base.OnStop();
if (_mtu != _origMtu)
{
using (var cfg = NetworkAdapter.CreateInstance(_iface))
{
Logger.Debug("Restoring the MTU of '{0}' to {1}.", _iface, _origMtu.HasValue ? _origMtu.ToString() : "<null>");
cfg.MTU = _origMtu;
}
}
_remoteEp = null;
_localIp = null;
_iface = null;
_mtu = null;
_origMtu = null;
}
protected override void OnSetProperty(string property, Variant value)
{
if (property == "MTU")
{
uint mtu = 0;
if (value.GetVariantType() == Variant.VariantType.BitStream)
{
var bs = (BitwiseStream)value;
bs.SeekBits(0, SeekOrigin.Begin);
ulong bits;
int len = bs.ReadBits(out bits, 32);
mtu = Endian.Little.GetUInt32(bits, len);
}
else if (value.GetVariantType() == Variant.VariantType.ByteString)
{
byte[] buf = (byte[])value;
int len = Math.Min(buf.Length * 8, 32);
mtu = Endian.Little.GetUInt32(buf, len);
}
else
{
throw new SoftException("Can't set MTU, 'value' is an unsupported type.");
}
if (MaxMTU >= mtu && mtu >= MinMTU)
{
using (var cfg = NetworkAdapter.CreateInstance(_iface))
{
try
{
cfg.MTU = mtu;
}
catch (Exception ex)
{
string msg = ex.Message;
if (ex is TypeInitializationException || ex is TargetInvocationException)
{
msg = ex.InnerException.Message;
}
string err = "Failed to change MTU of '{0}' to {1}. {2}".Fmt(_iface, mtu, msg);
Logger.Error(err);
var se = new SoftException(err, ex);
throw new SoftException(se);
}
_mtu = cfg.MTU;
if (!_mtu.HasValue || _mtu.Value != mtu)
{
string err = "Failed to change MTU of '{0}' to {1}. The change did not take effect.".Fmt(_iface, mtu);
Logger.Error(err);
throw new SoftException(err);
}
else
{
Logger.Debug("Changed MTU of '{0}' to {1}.", _iface, mtu);
}
}
}
else
{
Logger.Debug("Not setting MTU of '{0}', value is out of range.", _iface);
}
}
}
protected override void OnStart()
{
base.OnStart();
IPEndPoint ep;
IPAddress local;
string iface;
uint? mtu;
try
{
ep = ResolveHost();
if (!AddressFamilySupported(ep.AddressFamily))
{
throw new PeachException(string.Format("The resolved IP '{0}' for host '{1}' is not compatible with the {2} publisher.", ep, Host, _type));
}
local = Interface;
if (Interface == null)
{
local = GetLocalIp(ep);
}
if (local.IsIPv6LinkLocal && local.ScopeId == 0)
{
local = GetScopeId(local);
Logger.Trace("Resolved link-local interface IP for {0} socket to {1}.", _type, local);
}
try
{
iface = GetInterfaceName(local);
if (iface == null)
{
throw new PeachException("Could not resolve interface name for local IP '{0}'.".Fmt(local));
}
using (var cfg = NetworkAdapter.CreateInstance(iface))
{
mtu = cfg.MTU;
}
}
catch (Exception ex)
{
string msg = ex.Message;
if (ex is TypeInitializationException || ex is TargetInvocationException)
{
msg = ex.InnerException.Message;
}
iface = local.ToString();
mtu = null;
Logger.Debug("Could not query the MTU of '{0}'. {1}", iface, msg);
}
}
catch (Exception ex)
{
Logger.Error("Unable to start {0} publisher for {1}:{2}. {3}.", _type, Host, Port, ex.Message);
throw new SoftException(ex);
}
_remoteEp = ep;
_localIp = local;
_iface = iface;
_mtu = mtu;
_origMtu = mtu;
}
