private bool IsExpiresValid(SipMessageReader reader)
{
int expires = reader.GetExpires(defaultExpires, maxExpires);
for (int i = 0; i < reader.Count.ContactCount; i++)
{
int localExpires = reader.Contact[i].Expires;
if (localExpires == int.MinValue)
{
localExpires = expires;
}
if (localExpires != int.MinValue && localExpires > 0 && localExpires < minExpires)
{
return(false);
}
}
return(true);
}