[lwip-devel] [bug #49662] UDP layer should filter incoming multicast datagrams against the bound IP address

[David van Moolenbroek]

Follow-up Comment #3, bug #49662 (project lwip):

The change makes sense to me. I'd just like to add a small informational note
regarding the patch's commit message, because I misunderstood the patch at
first: "Multicast traffic is now only received on a UDP PCB [..] when the PCB
is bound to IP_ADDR_ANY." - it should be, and I believe it still is, possible
to receive multicast traffic from a single multicast address by binding the
UDP socket to that multicast address (eg see RFC 3493 Sec. 5.2, very last
sentence). That is however a different kind of filtering than what was changed
here.

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