[lwip-devel] [bug #56016] IPv6 auto configuration need some optimization

[Gao Qingshui]

URL:
  <https://savannah.nongnu.org/bugs/?56016>

                 Summary: IPv6 auto configuration need some optimization
                 Project: lwIP - A Lightweight TCP/IP stack
            Submitted by: kevingao
            Submitted on: Thu 28 Mar 2019 07:25:11 AM UTC
                Category: IPv6
                Severity: 3 - Normal
              Item Group: Change Request
                  Status: None
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any
         Planned Release: None
            lwIP version: git head

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Details:

1,currently we can use netif_set_ip6_autoconfig_enabled to enable auto
configuration on one specific netif, but this was just a Macro, not an thread
safe function. It is better to expose this API as one netifapi function to
make the user enable/disable auto configuration dynamically.
2,when enable auto configuration, lwip should send out Router Solicitation in
order to scan the Router, this could save much of the auto configuration
time.
3,when disable auto configuration, the auto configured IPv6 address should set
to invalid and not use anymore. Beside, netif->prefix->flag should be cleared.





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