[lwip-devel] [bug #49078] lwip cannot establish ipv6 connection, because of failed to fill ipv6 source address in Neighbor Solicitation Message

[lishen]

Follow-up Comment #1, bug #49078 (project lwip):

I find that add a local-link address to the interface will solve this problem.
However, with further reading the RFC (RFC4861 7.2.2), I find that RFC
recommended to set Neighbor Solicitation Message's source address to the
messages that triggers the NS message. I also read lwip's code (function
'nd6_send_ns'), it set the NS message's source address to an empty address if
local-link address is not valid at slot 0. I think lwip should at least select
a valid address when local-link address dose not exist, instead of using empty
address.


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