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
