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UA_Client_findServers() Inconsistency #2466

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wenxinleong opened this issue Feb 19, 2019 · 0 comments
Open
4 of 7 tasks

UA_Client_findServers() Inconsistency #2466

wenxinleong opened this issue Feb 19, 2019 · 0 comments
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@Pro
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Component: Server Issues related to the server code Priority: Low Issue with low priority Type: Bug Bug in the code which needs to be fixed
Milestone
1.0

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@wenxinleong
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wenxinleong commented Feb 19, 2019 •
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Description

Run discovery example in different order, UA_Client_findServers() produce a different result.

Background Information / Reproduction Steps

All examples run on a same device in the following order:

  1. discovery_server_lds
  2. discovery_server_multicast
  3. discovery_server_register
  4. discovery_client_find_servers

Output as expected, 3 servers appeared for both queries UA_Client_findServers() and UA_Client_findServersOnNetwork(), these servers are lds, register, and multicast

Server[0]: LDS-raspberrypi
	RecordID: 0
	Discovery URL: opc.tcp:https://raspberrypi:4840/
	Capabilities: LDS,

Server[1]: Sample Multicast Server-raspberrypi
	RecordID: 1
	Discovery URL: opc.tcp:https://raspberrypi:16600/
	Capabilities: NA,

Server[2]: Sample Server-raspberrypi
	RecordID: 2
	Discovery URL: opc.tcp:https://raspberrypi:4841/
	Capabilities: NA,

Server[0]: urn:open62541.example.local_discovery_server
	Name: open62541-based OPC UA Application
	Application URI: urn:open62541.example.local_discovery_server
	Product URI: http:https://open62541.org
	Type: Server
	Discovery URLs:
		[0]: opc.tcp:https://raspberrypi:4840/

Server[1]: urn:open62541.example.server_register
	Name: open62541-based OPC UA Application
	Application URI: urn:open62541.example.server_register
	Product URI: http:https://open62541.org
	Type: Server
	Discovery URLs:
		[0]: opc.tcp:https://raspberrypi:4841/

Server[2]: urn:open62541.example.server_multicast
	Name: open62541-based OPC UA Application
	Application URI: urn:open62541.example.server_multicast
	Product URI: http:https://open62541.org
	Type: Discovery Server
	Discovery URLs:
		[0]: opc.tcp:https://raspberrypi:16600/

-------- Server Endpoints --------

Endpoints for Server[0]: urn:open62541.example.local_discovery_server

	Endpoint[0]:
		Endpoint URL: opc.tcp:https://raspberrypi:4840/
		Transport profile URI: http:https://opcfoundation.org/UA-Profile/Transport/uatcp-uasc-uabinary
		Security Mode: None
		Security profile URI: http:https://opcfoundation.org/UA/SecurityPolicy#None
		Security Level: 0
Endpoints for Server[1]: urn:open62541.example.server_register

	Endpoint[0]:
		Endpoint URL: opc.tcp:https://raspberrypi:4841/
		Transport profile URI: http:https://opcfoundation.org/UA-Profile/Transport/uatcp-uasc-uabinary
		Security Mode: None
		Security profile URI: http:https://opcfoundation.org/UA/SecurityPolicy#None
		Security Level: 0
Endpoints for Server[2]: urn:open62541.example.server_multicast

	Endpoint[0]:
		Endpoint URL: opc.tcp:https://raspberrypi:16600/
		Transport profile URI: http:https://opcfoundation.org/UA-Profile/Transport/uatcp-uasc-uabinary
		Security Mode: None
		Security profile URI: http:https://opcfoundation.org/UA/SecurityPolicy#None
		Security Level: 0

However, in a different order:

  1. discovery_server_lds
  2. discovery_server_register
  3. discovery_server_multicast
  4. discovery_client_find_servers

Output of UA_Client_findServersOnNetwork() is still 3 servers. But, UA_Client_findServers() is only 2, server multicast is missing

Server[0]: LDS-raspberrypi
	RecordID: 0
	Discovery URL: opc.tcp:https://raspberrypi:4840/
	Capabilities: LDS,

Server[1]: Sample Server-raspberrypi
	RecordID: 1
	Discovery URL: opc.tcp:https://raspberrypi:4841/
	Capabilities: NA,

Server[2]: Sample Multicast Server-raspberrypi
	RecordID: 2
	Discovery URL: opc.tcp:https://raspberrypi:16600/
	Capabilities: NA,

Server[0]: urn:open62541.example.local_discovery_server
	Name: open62541-based OPC UA Application
	Application URI: urn:open62541.example.local_discovery_server
	Product URI: http:https://open62541.org
	Type: Server
	Discovery URLs:
		[0]: opc.tcp:https://raspberrypi:4840/

Server[1]: urn:open62541.example.server_register
	Name: open62541-based OPC UA Application
	Application URI: urn:open62541.example.server_register
	Product URI: http:https://open62541.org
	Type: Server
	Discovery URLs:
		[0]: opc.tcp:https://raspberrypi:4841/

-------- Server Endpoints --------

Endpoints for Server[0]: urn:open62541.example.local_discovery_server

	Endpoint[0]:
		Endpoint URL: opc.tcp:https://raspberrypi:4840/
		Transport profile URI: http:https://opcfoundation.org/UA-Profile/Transport/uatcp-uasc-uabinary
		Security Mode: None
		Security profile URI: http:https://opcfoundation.org/UA/SecurityPolicy#None
		Security Level: 0
Endpoints for Server[1]: urn:open62541.example.server_register

	Endpoint[0]:
		Endpoint URL: opc.tcp:https://raspberrypi:4841/
		Transport profile URI: http:https://opcfoundation.org/UA-Profile/Transport/uatcp-uasc-uabinary
		Security Mode: None
		Security profile URI: http:https://opcfoundation.org/UA/SecurityPolicy#None
		Security Level: 0

Everything else looks normal except an error message on Multicast DNS as following. The multicast example works ok, so im not sure how significant this error is?

pi@raspberrypi:~/Proj/open62541/open62541/build/bin/examples $ ./discovery_server_lds 
[2019-02-19 15:55:18.993 (UTC+0800)] info/network	TCP network layer listening on opc.tcp:https://raspberrypi:4840/
[2019-02-19 15:55:18.993 (UTC+0800)] info/server	Multicast DNS: add record for domain: LDS-raspberrypi._opcua-tcp._tcp.local.
[2019-02-19 15:55:19.094 (UTC+0800)] error/server	Multicast error: Can not write to socket. Resource temporarily unavailable
[2019-02-19 15:55:19.195 (UTC+0800)] info/server	Multicast DNS: found server: opc.tcp:https://raspberrypi:4840/
[2019-02-19 15:55:19.195 (UTC+0800)] error/server	Multicast error: Can not write to socket. Resource temporarily unavailable
[2019-02-19 15:55:19.898 (UTC+0800)] error/server	Multicast error: Can not write to socket. Resource temporarily unavailable
[2019-02-19 15:55:21.904 (UTC+0800)] error/server	Multicast error: Can not write to socket. Resource temporarily unavailable
[2019-02-19 15:55:22.206 (UTC+0800)] error/server	Multicast error: Can not write to socket. Resource temporarily unavailable
[2019-02-19 15:55:22.307 (UTC+0800)] error/server	Multicast error: Can not write to socket. Resource temporarily unavailable
[2019-02-19 15:55:22.879 (UTC+0800)] info/network	Connection 6 | New connection over TCP from 127.0.0.1
[2019-02-19 15:55:22.879 (UTC+0800)] info/channel	Creating a new SecureChannel
[2019-02-19 15:55:22.879 (UTC+0800)] warn/securitypolicy	No PKI plugin set. Accepting all certificates
[2019-02-19 15:55:22.879 (UTC+0800)] info/channel	Connection 6 | SecureChannel 1 | Opened SecureChannel
[2019-02-19 15:55:22.880 (UTC+0800)] info/session	Connection 6 | SecureChannel 1 | Session b96ca1c2-ba7f-6a45-2462-d6ad2d2232d3 | ActivateSession: Session activated
[2019-02-19 15:55:22.880 (UTC+0800)] info/server	Multicast DNS: add record for domain: Sample Multicast Server-raspberrypi._opcua-tcp._tcp.local.
[2019-02-19 15:55:22.881 (UTC+0800)] info/session	Connection 6 | SecureChannel 1 | Session b96ca1c2-ba7f-6a45-2462-d6ad2d2232d3 | CloseSession
[2019-02-19 15:55:22.881 (UTC+0800)] error/server	Multicast error: Can not write to socket. Resource temporarily unavailable
[2019-02-19 15:55:22.881 (UTC+0800)] info/channel	Connection 6 | SecureChannel 1 | CloseSecureChannel
[2019-02-19 15:55:22.881 (UTC+0800)] info/network	Connection 6 | Closed
[2019-02-19 15:55:23.082 (UTC+0800)] info/server	Multicast DNS: found server: opc.tcp:https://raspberrypi:16600/
[2019-02-19 15:55:23.082 (UTC+0800)] error/server	Multicast error: Can not write to socket. Resource temporarily unavailable
[2019-02-19 15:55:23.184 (UTC+0800)] error/server	Multicast error: Can not write to socket. Resource temporarily unavailable
[2019-02-19 15:55:23.735 (UTC+0800)] error/server	Multicast error: Can not write to socket. Resource temporarily unavailable
[2019-02-19 15:55:25.741 (UTC+0800)] error/server	Multicast error: Can not write to socket. Resource temporarily unavailable
[2019-02-19 15:55:27.746 (UTC+0800)] error/server	Multicast error: Can not write to socket. Resource temporarily unavailable

Checklist

Please provide the following information:

  • open62541 Version (release number or git tag): v0.3.0
  • Other OPC UA SDKs used (client or server):
  • Operating system: raspberry pi3 (Linux raspberrypi 4.14.79-v7+ armv7l )
  • Logs (with UA_LOGLEVEL set as low as necessary) attached
  • Wireshark network dump attached
  • Self-contained code example attached: examples\discovery
  • Critical issue
@Pro Pro self-assigned this Feb 25, 2019
@Pro Pro added Component: Server Issues related to the server code Priority: Low Issue with low priority Type: Bug Bug in the code which needs to be fixed labels Jul 25, 2019
@Pro Pro added this to the 1.0 milestone Jul 25, 2019
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