[lwip-devel] [bug #38803] Source address in broadcast ping reply

[Valery Ushakov]

Follow-up Comment #1, bug #38803 (project lwip):

The patch seems wrong, unfortunately, because in the presense of multiple
interfaces it will use incorrect specific-destination address for packets
received on one interface with destination being a broadcast address of
another.

ip_input() has "inp" variable for the interface the packet was received on and
"netif" variable for the destination interface.  icmp_input() is passed "inp",
but the packet might have been recognized as "for us" using broacast address
of another interface ("netif").  Echo reply should have "netif" address as its
source, not that of "inp", but "netif" is not passed.


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