1. Socat test: (Socat crashed or closed afterthis one xml output)

root@Linux-SRV:~# socat UDP4-RECVFROM:3702,ip-add-membership=239.255.255.250:192.168.25.4:2 STDIO
<?xml version="1.0" encoding="utf-8"?><soap:Envelope xmlns:soap="http://www.w3.org/2003/05/soap-envelope" xmlns:wsa="http://schemas.xmlsoap.org/ws/2004/08/addressing" xmlns:wsd="http://schemas.xmlsoap.org/ws/2005/04/discovery" xmlns:wsdp="http://schemas.xmlsoap.org/ws/2006/02/devprof"><soap:Header><wsa:To>urn:schemas-xmlsoap-org:ws:2005:04:discovery</wsa:To><wsa:Action>http://schemas.xmlsoap.org/ws/2005/04/discovery/Probe</wsa:Action><wsa:MessageID>urn:uuid:5950505d-a96b-45cc-bd80-726207edb26f</wsa:MessageID></soap:Header><soap:Body><wsd:Probe><wsd:Types>wsdp:Device</wsd:Types></wsd:Probe></soap:Body></soap:Envelope>



2. wsdd -vv (i have only one interface in this VM -> eth0)
- Note: between the linebreaks below, is exactly one Explorer Refresh.

root@Linux-SRV:~# wsdd -vv
2021-02-19 23:36:31,210:wsdd WARNING(pid 10881): no interface given, using all interfaces
2021-02-19 23:36:31,210:wsdd INFO(pid 10881): using pre-defined UUID d0db8b4d-d1f7-52e2-8775-d383f6c4b7d1
2021-02-19 23:36:31,211:wsdd DEBUG(pid 10881): netlink message with 164 bytes
2021-02-19 23:36:31,211:wsdd DEBUG(pid 10881): rt_attr 8 1
2021-02-19 23:36:31,211:wsdd DEBUG(pid 10881): rt_attr 8 2
2021-02-19 23:36:31,211:wsdd DEBUG(pid 10881): rt_attr 7 3
2021-02-19 23:36:31,211:wsdd DEBUG(pid 10881): rt_attr 8 8
2021-02-19 23:36:31,211:wsdd DEBUG(pid 10881): rt_attr 20 6
2021-02-19 23:36:31,211:wsdd DEBUG(pid 10881): new address 127.0.0.1 on lo
2021-02-19 23:36:31,211:wsdd DEBUG(pid 10881): ignoring that address on lo
2021-02-19 23:36:31,211:wsdd DEBUG(pid 10881): rt_attr 8 1
2021-02-19 23:36:31,211:wsdd DEBUG(pid 10881): rt_attr 8 2
2021-02-19 23:36:31,211:wsdd DEBUG(pid 10881): rt_attr 8 4
2021-02-19 23:36:31,211:wsdd DEBUG(pid 10881): rt_attr 9 3
2021-02-19 23:36:31,211:wsdd DEBUG(pid 10881): rt_attr 8 8
2021-02-19 23:36:31,211:wsdd DEBUG(pid 10881): rt_attr 20 6
2021-02-19 23:36:31,211:wsdd DEBUG(pid 10881): new address 192.168.25.4 on eth0
2021-02-19 23:36:31,211:wsdd DEBUG(pid 10881): handling traffic for 192.168.25.4 on eth0
2021-02-19 23:36:31,212:wsdd INFO(pid 10881): joined multicast group ('239.255.255.250', 3702) on 192.168.25.4%eth0
2021-02-19 23:36:31,212:wsdd DEBUG(pid 10881): transport address on eth0 is 192.168.25.4
2021-02-19 23:36:31,212:wsdd DEBUG(pid 10881): will listen for HTTP traffic on address ('192.168.25.4', 5357)
2021-02-19 23:36:31,212:wsdd DEBUG(pid 10881): constructed xml for WSD message: b'<?xml version="1.0" encoding="utf-8"?><soap:Envelope xmlns:pnpx="http://schemas.microsoft.com/windows/pnpx/2005/10" xmlns:pub="http://schemas.microsoft.com/windows/pub/2005/07" xmlns:soap="http://www.w3.org/2003/05/soap-envelope" xmlns:wsa="http://schemas.xmlsoap.org/ws/2004/08/addressing" xmlns:wsd="http://schemas.xmlsoap.org/ws/2005/04/discovery" xmlns:wsdp="http://schemas.xmlsoap.org/ws/2006/02/devprof" xmlns:wsx="http://schemas.xmlsoap.org/ws/2004/09/mex"><soap:Header><wsa:To>urn:schemas-xmlsoap-org:ws:2005:04:discovery</wsa:To><wsa:Action>http://schemas.xmlsoap.org/ws/2005/04/discovery/Hello</wsa:Action><wsa:MessageID>urn:uuid:e9a762c2-7302-11eb-938c-f26d0ff3c845</wsa:MessageID><wsd:AppSequence InstanceId="1613774191" MessageNumber="0" SequenceId="urn:uuid:e9a7636c-7302-11eb-938c-f26d0ff3c845" /></soap:Header><soap:Body><wsd:Hello><wsa:EndpointReference><wsa:Address>urn:uuid:d0db8b4d-d1f7-52e2-8775-d383f6c4b7d1</wsa:Address></wsa:EndpointReference><wsd:XAddrs>http://192.168.25.4:5357/d0db8b4d-d1f7-52e2-8775-d383f6c4b7d1</wsd:XAddrs><wsd:MetadataVersion>1</wsd:MetadataVersion></wsd:Hello></soap:Body></soap:Envelope>'
2021-02-19 23:36:31,212:wsdd DEBUG(pid 10881): scheduling Hello message via eth0 to ('239.255.255.250', 3702)
2021-02-19 23:36:31,213:wsdd DEBUG(pid 10881): netlink message with 216 bytes
2021-02-19 23:36:31,213:wsdd DEBUG(pid 10881): rt_attr 20 1
2021-02-19 23:36:31,213:wsdd DEBUG(pid 10881): rt_attr 20 6
2021-02-19 23:36:31,213:wsdd DEBUG(pid 10881): rt_attr 8 8
2021-02-19 23:36:31,213:wsdd DEBUG(pid 10881): new address ::1 on lo
2021-02-19 23:36:31,213:wsdd DEBUG(pid 10881): ignoring that address on lo
2021-02-19 23:36:31,213:wsdd DEBUG(pid 10881): rt_attr 20 1
2021-02-19 23:36:31,213:wsdd DEBUG(pid 10881): rt_attr 20 6
2021-02-19 23:36:31,213:wsdd DEBUG(pid 10881): rt_attr 8 8
2021-02-19 23:36:31,213:wsdd DEBUG(pid 10881): new address 2003:e3:71e:100:f06d:fff:fef3:c845 on eth0
2021-02-19 23:36:31,213:wsdd DEBUG(pid 10881): ignoring that address on eth0
2021-02-19 23:36:31,213:wsdd DEBUG(pid 10881): rt_attr 20 1
2021-02-19 23:36:31,213:wsdd DEBUG(pid 10881): rt_attr 20 6
2021-02-19 23:36:31,213:wsdd DEBUG(pid 10881): rt_attr 8 8
2021-02-19 23:36:31,213:wsdd DEBUG(pid 10881): new address fe80::f06d:fff:fef3:c845 on eth0
2021-02-19 23:36:31,213:wsdd DEBUG(pid 10881): handling traffic for fe80::f06d:fff:fef3:c845 on eth0
2021-02-19 23:36:31,213:wsdd INFO(pid 10881): joined multicast group ('ff02::c', 3702, 22364, 2) on fe80::f06d:fff:fef3:c845%eth0
2021-02-19 23:36:31,213:wsdd DEBUG(pid 10881): transport address on eth0 is [fe80::f06d:fff:fef3:c845]
2021-02-19 23:36:31,213:wsdd DEBUG(pid 10881): will listen for HTTP traffic on address ('fe80::f06d:fff:fef3:c845', 5357, 0, 2)
2021-02-19 23:36:31,214:wsdd DEBUG(pid 10881): constructed xml for WSD message: b'<?xml version="1.0" encoding="utf-8"?><soap:Envelope xmlns:pnpx="http://schemas.microsoft.com/windows/pnpx/2005/10" xmlns:pub="http://schemas.microsoft.com/windows/pub/2005/07" xmlns:soap="http://www.w3.org/2003/05/soap-envelope" xmlns:wsa="http://schemas.xmlsoap.org/ws/2004/08/addressing" xmlns:wsd="http://schemas.xmlsoap.org/ws/2005/04/discovery" xmlns:wsdp="http://schemas.xmlsoap.org/ws/2006/02/devprof" xmlns:wsx="http://schemas.xmlsoap.org/ws/2004/09/mex"><soap:Header><wsa:To>urn:schemas-xmlsoap-org:ws:2005:04:discovery</wsa:To><wsa:Action>http://schemas.xmlsoap.org/ws/2005/04/discovery/Hello</wsa:Action><wsa:MessageID>urn:uuid:e9a7ab06-7302-11eb-938c-f26d0ff3c845</wsa:MessageID><wsd:AppSequence InstanceId="1613774191" MessageNumber="1" SequenceId="urn:uuid:e9a7ab7e-7302-11eb-938c-f26d0ff3c845" /></soap:Header><soap:Body><wsd:Hello><wsa:EndpointReference><wsa:Address>urn:uuid:d0db8b4d-d1f7-52e2-8775-d383f6c4b7d1</wsa:Address></wsa:EndpointReference><wsd:XAddrs>http://[fe80::f06d:fff:fef3:c845]:5357/d0db8b4d-d1f7-52e2-8775-d383f6c4b7d1</wsd:XAddrs><wsd:MetadataVersion>1</wsd:MetadataVersion></wsd:Hello></soap:Body></soap:Envelope>'
2021-02-19 23:36:31,214:wsdd DEBUG(pid 10881): scheduling Hello message via eth0 to ('ff02::c', 3702, 22364, 2)
2021-02-19 23:36:31,214:wsdd DEBUG(pid 10881): netlink message with 20 bytes
2021-02-19 23:36:31,214:wsdd DEBUG(pid 10881): invalid rtm_message type 3








2021-02-19 23:36:42,042:wsdd INFO(pid 10881): 192.168.27.56:57142(eth0) - - "Probe urn:uuid:007316ab-9e42-4855-8e3e-8f29c37037aa UDP" - -
2021-02-19 23:36:42,042:wsdd DEBUG(pid 10881): incoming message content is b'<?xml version="1.0" encoding="utf-8"?><soap:Envelope xmlns:soap="http://www.w3.org/2003/05/soap-envelope" xmlns:wsa="http://schemas.xmlsoap.org/ws/2004/08/addressing" xmlns:wsd="http://schemas.xmlsoap.org/ws/2005/04/discovery" xmlns:wsdp="http://schemas.xmlsoap.org/ws/2006/02/devprof"><soap:Header><wsa:To>urn:schemas-xmlsoap-org:ws:2005:04:discovery</wsa:To><wsa:Action>http://schemas.xmlsoap.org/ws/2005/04/discovery/Probe</wsa:Action><wsa:MessageID>urn:uuid:007316ab-9e42-4855-8e3e-8f29c37037aa</wsa:MessageID></soap:Header><soap:Body><wsd:Probe><wsd:Types>wsdp:Device</wsd:Types></wsd:Probe></soap:Body></soap:Envelope>'
2021-02-19 23:36:42,043:wsdd DEBUG(pid 10881): constructed xml for WSD message: b'<?xml version="1.0" encoding="utf-8"?><soap:Envelope xmlns:pnpx="http://schemas.microsoft.com/windows/pnpx/2005/10" xmlns:pub="http://schemas.microsoft.com/windows/pub/2005/07" xmlns:soap="http://www.w3.org/2003/05/soap-envelope" xmlns:wsa="http://schemas.xmlsoap.org/ws/2004/08/addressing" xmlns:wsd="http://schemas.xmlsoap.org/ws/2005/04/discovery" xmlns:wsdp="http://schemas.xmlsoap.org/ws/2006/02/devprof" xmlns:wsx="http://schemas.xmlsoap.org/ws/2004/09/mex"><soap:Header><wsa:To>http://schemas.xmlsoap.org/ws/2004/08/addressing/role/anonymous</wsa:To><wsa:Action>http://schemas.xmlsoap.org/ws/2005/04/discovery/ProbeMatches</wsa:Action><wsa:MessageID>urn:uuid:f01c00ea-7302-11eb-938c-f26d0ff3c845</wsa:MessageID><wsa:RelatesTo>urn:uuid:007316ab-9e42-4855-8e3e-8f29c37037aa</wsa:RelatesTo><wsd:AppSequence InstanceId="1613774191" MessageNumber="2" SequenceId="urn:uuid:f01c0248-7302-11eb-938c-f26d0ff3c845" /></soap:Header><soap:Body><wsd:ProbeMatches><wsd:ProbeMatch><wsa:EndpointReference><wsa:Address>urn:uuid:d0db8b4d-d1f7-52e2-8775-d383f6c4b7d1</wsa:Address></wsa:EndpointReference><wsd:Types>wsdp:Device pub:Computer</wsd:Types><wsd:MetadataVersion>1</wsd:MetadataVersion></wsd:ProbeMatch></wsd:ProbeMatches></soap:Body></soap:Envelope>'
2021-02-19 23:36:42,259:wsdd DEBUG(pid 10881): known message (urn:uuid:007316ab-9e42-4855-8e3e-8f29c37037aa): dropping it
2021-02-19 23:36:42,686:wsdd DEBUG(pid 10881): known message (urn:uuid:007316ab-9e42-4855-8e3e-8f29c37037aa): dropping it
2021-02-19 23:36:43,546:wsdd DEBUG(pid 10881): known message (urn:uuid:007316ab-9e42-4855-8e3e-8f29c37037aa): dropping it
2021-02-19 23:36:43,897:wsdd DEBUG(pid 10881): netlink message with 72 bytes
2021-02-19 23:36:43,897:wsdd DEBUG(pid 10881): rt_attr 20 1
2021-02-19 23:36:43,897:wsdd DEBUG(pid 10881): rt_attr 20 6
2021-02-19 23:36:43,897:wsdd DEBUG(pid 10881): rt_attr 8 8
2021-02-19 23:36:43,897:wsdd DEBUG(pid 10881): new address 2003:e3:71e:100:f06d:fff:fef3:c845 on eth0
2021-02-19 23:36:43,897:wsdd DEBUG(pid 10881): ignoring that address on eth0
2021-02-19 23:36:45,257:wsdd DEBUG(pid 10881): known message (urn:uuid:007316ab-9e42-4855-8e3e-8f29c37037aa): dropping it
2021-02-19 23:36:47,264:wsdd DEBUG(pid 10881): known message (urn:uuid:007316ab-9e42-4855-8e3e-8f29c37037aa): dropping it
2021-02-19 23:36:49,279:wsdd DEBUG(pid 10881): known message (urn:uuid:007316ab-9e42-4855-8e3e-8f29c37037aa): dropping it






^C2021-02-19 23:37:09,104:wsdd DEBUG(pid 10881): got termination signal
2021-02-19 23:37:09,104:wsdd INFO(pid 10881): shutting down gracefully...
2021-02-19 23:37:09,105:wsdd DEBUG(pid 10881): constructed xml for WSD message: b'<?xml version="1.0" encoding="utf-8"?><soap:Envelope xmlns:pnpx="http://schemas.microsoft.com/windows/pnpx/2005/10" xmlns:pub="http://schemas.microsoft.com/windows/pub/2005/07" xmlns:soap="http://www.w3.org/2003/05/soap-envelope" xmlns:wsa="http://schemas.xmlsoap.org/ws/2004/08/addressing" xmlns:wsd="http://schemas.xmlsoap.org/ws/2005/04/discovery" xmlns:wsdp="http://schemas.xmlsoap.org/ws/2006/02/devprof" xmlns:wsx="http://schemas.xmlsoap.org/ws/2004/09/mex"><soap:Header><wsa:To>urn:schemas-xmlsoap-org:ws:2005:04:discovery</wsa:To><wsa:Action>http://schemas.xmlsoap.org/ws/2005/04/discovery/Bye</wsa:Action><wsa:MessageID>urn:uuid:003d5b04-7303-11eb-938c-f26d0ff3c845</wsa:MessageID><wsd:AppSequence InstanceId="1613774191" MessageNumber="3" SequenceId="urn:uuid:003d5c26-7303-11eb-938c-f26d0ff3c845" /></soap:Header><soap:Body><wsd:Bye><wsa:EndpointReference><wsa:Address>urn:uuid:d0db8b4d-d1f7-52e2-8775-d383f6c4b7d1</wsa:Address></wsa:EndpointReference></wsd:Bye></soap:Body></soap:Envelope>'
2021-02-19 23:37:09,105:wsdd DEBUG(pid 10881): scheduling Bye message via eth0 to ('239.255.255.250', 3702)
2021-02-19 23:37:09,105:wsdd DEBUG(pid 10881): constructed xml for WSD message: b'<?xml version="1.0" encoding="utf-8"?><soap:Envelope xmlns:pnpx="http://schemas.microsoft.com/windows/pnpx/2005/10" xmlns:pub="http://schemas.microsoft.com/windows/pub/2005/07" xmlns:soap="http://www.w3.org/2003/05/soap-envelope" xmlns:wsa="http://schemas.xmlsoap.org/ws/2004/08/addressing" xmlns:wsd="http://schemas.xmlsoap.org/ws/2005/04/discovery" xmlns:wsdp="http://schemas.xmlsoap.org/ws/2006/02/devprof" xmlns:wsx="http://schemas.xmlsoap.org/ws/2004/09/mex"><soap:Header><wsa:To>urn:schemas-xmlsoap-org:ws:2005:04:discovery</wsa:To><wsa:Action>http://schemas.xmlsoap.org/ws/2005/04/discovery/Bye</wsa:Action><wsa:MessageID>urn:uuid:003d6716-7303-11eb-938c-f26d0ff3c845</wsa:MessageID><wsd:AppSequence InstanceId="1613774191" MessageNumber="4" SequenceId="urn:uuid:003d6784-7303-11eb-938c-f26d0ff3c845" /></soap:Header><soap:Body><wsd:Bye><wsa:EndpointReference><wsa:Address>urn:uuid:d0db8b4d-d1f7-52e2-8775-d383f6c4b7d1</wsa:Address></wsa:EndpointReference></wsd:Bye></soap:Body></soap:Envelope>'
2021-02-19 23:37:09,105:wsdd DEBUG(pid 10881): scheduling Bye message via eth0 to ('ff02::c', 3702, 22364, 2)
2021-02-19 23:37:10,241:wsdd INFO(pid 10881): Done.