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Add UDN to SSDP discoverables, as discussed in #165 #173
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balloob
approved these changes
Feb 18, 2018
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Regarding to your question wrt. serial number, serial number is just a RECOMMENDED where-as UDN is REQUIRED by the spec. Furthermore several vendors may be sharing serial numbers while the UDN should still remain unique. The spec contains recommendations how to generate such an UDN, although old UPnP 1.x devices may not follow these (and should still be accepted). However the latest from that series is 1.1 from 2008, so I think a growing number of devices will adhere to this newer format. |
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UDN is a part of the standard (https://upnp.org/specs/arch/UPnP-arch-DeviceArchitecture-v2.0.pdf) which yields an UUID which allows unique identification of the device.