[lwip-users] Multiple netifs: UDP broadcasts on a certain netif showing up on udps connected to a different netif

[Steinberg Michael]

Hello all,

seemingly the udp_input code is serving UDP broadcasts originating from a 
certain netif to UDP sockets/pcbs bound to the correct port on a different 
netif.
Patching udp.c:255 following to:

#endif /* SO_REUSE */
          ) && (inp->ip_addr.addr == pcb->local_ip.addr)) {
        /* the first unconnected matching PCB */
        uncon_pcb = pcb;

seems like a working short term fix.

Kind regards,
Michael