Justin Maggard 9bb6cf5051 minissdp: Re-add SSDP filtering ...

Add back SSDP filtering.  Relying on the kernel to filter out multicast
traffic from non-member interfaces simply doesn't work the way many
people think it does, so we need to re-introduce manual filtering.  But
this time we will use in_pktinfo's ifindex for comparison rather than a
netmask comparison, so SSDP packets from other subnets should still work.

2018-01-16 17:12:20 -08:00

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