[lwip-devel] [bug #34072] UDP Broadcast is received from wrong UDP PCB if udp_port matches

[Andreas Becker]

Follow-up Comment #2, bug #34072 (project lwip):

Hi Ivan,

what do you think is the benefit in 
- Comparing ip_current_dest_addr with the hopefully correct Net to the PCB?
over
- Match the PCB IP with the IP from the interface, the packet arrives from.

Example with hierarchical routing

First  Netif 192.168.0.1 / 16  PCB IP: 192.168.0.1
Second Netif 192.168.1.1 / 24  PCB IP: 192.168.1.1

When something arrives from second Netif, dest IP is 192.168.1.255. 
Then you could get the same bad PCB match.

I think wie could expect that the user uses the same IP at the PCB and the
local IP.





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