Messages in this thread | | | From | Rocco Yue <> | Subject | Re: [PATCH 1/4] net: if_arp: add ARPHRD_PUREIP type | Date | Thu, 24 Jun 2021 13:31:59 +0800 |
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On Wed, 2021-06-23 at 23:15 -0600, David Ahern wrote: On 6/23/21 9:33 PM, Rocco Yue wrote: >> >> The difference between RAWIP and PUREIP is that they generate IPv6 >> link-local address and IPv6 global address in different ways. >> >> RAWIP: >> ~~~~~~ >> In the ipv6_generate_eui64() function, using RAWIP will always return 0, >> which will cause the kernel to automatically generate an IPv6 link-local >> address in EUI64 format and an IPv6 global address in EUI64 format. >> >> PUREIP: >> ~~~~~~~ >> After this patch set, when using PUREIP, kernel doesn't generate IPv6 >> link-local address regardless of which IN6_ADDR_GEN_MODE is used. >> >> @@ static void addrconf_dev_config(struct net_device *dev) >> + if (dev->type == ARPHRD_PUREIP) >> + return; >> >> And after recving RA message, kernel iterates over the link-local address >> that exists for the interface and uses the low 64bits of the link-local >> address to generate the IPv6 global address. >> The general process is as follows: >> ndisc_router_discovery() -> addrconf_prefix_rcv() -> >> ipv6_generate_eui64() -> ipv6_inherit_eui64() >> > > please add that to the commit message.
Thanks for your reminding, will do.
Thanks, Rocco
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