// Full constructor
public OPCClient(string OPCAddress, string username, string password, ILogger logger, string clientName, SecurityPolicy securityPolicy, MessageSecurity messageSecurity)
{
//Initialize Logger
Logger = logger;
Logger?.Init();
_Address = OPCAddress; //Example: opc.tcp://localhost:4840
_ClientName = clientName;
_OPC_User = username;
_OPC_Password = password;
SecurityPolicy = securityPolicy;
MessageSecurity = messageSecurity;
//Create opc client session
Init();
if (IsAvailable)
{
Logger?.LogDebug($"OPC - Created new client: {clientName}. Address: {_Address}.");
}
else
{
Logger?.LogDebug($"OPC - Client: {clientName} initialization failure. Started reconnection procedure.");
//Check Connection Every X seconds
Set_CheckConnection();
}
}
public static EndpointDescription SelectEndpointBySecurity(string discoveryUrl, SecurityPolicy securityPolicy, MessageSecurity messageSecurity, int operationTimeout = -1)
{
Uri uri = new Uri(discoveryUrl);
EndpointConfiguration configuration = EndpointConfiguration.Create();
if (operationTimeout > 0)
{
configuration.OperationTimeout = operationTimeout;
}
EndpointDescription selectedEndpoint = null;
MessageSecurityMode actualMessageSecurity;
switch (messageSecurity)
{
case MessageSecurity.SignAndEncrypt:
actualMessageSecurity = MessageSecurityMode.SignAndEncrypt;
break;
case MessageSecurity.Sign:
actualMessageSecurity = MessageSecurityMode.Sign;
break;
case MessageSecurity.None:
default:
actualMessageSecurity = MessageSecurityMode.None;
break;
}
// Connect to the server's discovery endpoint and find the available configuration.
using (DiscoveryClient client = DiscoveryClient.Create(uri, configuration))
{
EndpointDescriptionCollection endpoints = client.GetEndpoints(null);
selectedEndpoint = endpoints.FirstOrDefault(ep => ep.SecurityMode == actualMessageSecurity && ep.SecurityPolicyUri.Contains(securityPolicy.ToString()));
}
return(selectedEndpoint);
}
