[lwip-devel] [bug #33634] ip_forward() have a faulty behaviour.

[hanhui]

Follow-up Comment #9, bug #33634 (project lwip):

OK, I will provide patch files next time.

Many functions can be extended use LWIP_IP_INPUT_HOOK, such as : NAT, IP
packet filter, Statistical analysis and so on. I think this hook is very
useful, and can do something in the routing algorithm.

MCAST is not currently used, so you can temporarily not add. 

However, in BSD systems, transport layer will determines the type of
link-layer address.

for example: RFC1122 4.2.3.10, p. 104: discard bcast/mcast SYN.
so tcp will discard the cast/mcast SYN packet.

Of course, lwip not judge now, also did not lead problems.

You decide whether to keep MCAST flag!


 

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