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.
