Messages in this thread | | | From | Rocco Yue <> | Subject | Re: [PATCH] net: ipv6: don't generate link-local address in any addr_gen_mode | Date | Mon, 5 Jul 2021 13:48:02 +0800 |
| |
On Thu, 2021-07-01 at 16:51 +0800, Rocco Yue wrote: > On Wed, 2021-06-30 at 22:41 -0600, David Ahern wrote: >> On 6/30/21 9:39 PM, Rocco Yue wrote: >>> >>> Hi David, >>> >>> Thanks for your review. >>> >>> This patch is different with IN6_ADDR_GEN_MODE_NONE. >>> >>> When the addr_gen_mode == IN6_ADDR_GEN_MODE_NONE, the Linux kernel >>> doesn't automatically generate the ipv6 link-local address. >>> >> >> ... >> >>> >>> After this patch, when the "disable_gen_linklocal_addr" value of a device >>> is 1, no matter in which addr_gen_mode, the Linux kernel will not automatically >>> generate an ipv6 link-local for this device. >>> >> >> those 2 sentences are saying the same thing to me. >> >> for your use case, why is setting addr_gen_mode == 1 for the device not >> sufficient? >> > > For mobile operators that don't need to support RFC7217, setting > addr_gen_mode == 1 is sufficient; > > But for some other mobile operators that need to support RFC7217, such as AT&T, > the mobile device's addr_gen_mode will be switched to the > IN6_ADDR_GEN_MODE_STABLE_PRIVACY, instead of using IN6_ADDR_GEN_MODE_NONE. > The purpose is: in the IN6_ADDR_GEN_MODE_STABLE_PRIVACY mode, kernel can > gererate a stable privacy global ipv6 address after receiveing RA, and > network processes can use this global address to communicate with the > outside network. > > Of course, mobile operators that need to support RFC7217 should also meet > the requirement of 3GPP TS 29.061, that is, MT should use IID assigned by > the GGSN to build its ipv6 link-local address and use this address to send RS. > We don't want the kernel to automatically generate an ipv6 link-local address > when addr_gen_mode == 2. Otherwise, using the stable privacy ipv6 link-local > address automatically generated by the kernel to send RS message, GGSN will > not be able to respond to the RS and reply a RA message. > > Therefore, after this patch, kernel will not generate ipv6 link-local address > for the corresponding device when addr_gen_mode == 1 or addr_gen_mode == 2. > > Thanks, > Rocco >
Hi David,
Gentle ping for this patch.
Thanks, Rocco
| |