Hi Theo,
is umb really working that differently for a P2P interface? I think it
is very similar to ppp(4) and IPv6. The standard way is to obtain the IP
address via PPP protocol. Just like this, umb(4) obtains the IP address
via MBIM protocol.
That's what is implemented with this and former umb(4) patches. With the
current patch you can just do "ifconfig umb0 inet eui64" or "ifconfig
umb0 -inet6" anytime, whether the interface is up or not.
But then there seem to be strange ISPs in Japan as detected by job@.
They don't provide any IPv6 address via MBIM protocol but rather use the
standard IPv6 SLAAC protocol. It strange; just as if ppp(4) would need
DHCP to obtain its IPv4 address. But still, it seems to exist and users
can still work with umb(4) if they do "ifconfig umb0 inet6 autoconf".
I don't see any way, how this different behavior could be "unified" in
umb(4). It's a problem with the ISP, not with the driver.
Gerhard
On 4/30/20 8:04 PM, Theo de Raadt wrote:
I don't know the answers.
But if umb works differently it will suck.
I also feel noone is going to read the manual page, find this piece
of text, and understand it. Honestly, I don't understand this piece
of text. I'm not going to set the AUTOCONF6 flag. How does one even
set it?
ifconfig: AUTOCONF6: bad value
Of course not, but I am ironically trying to show this documentation
chunk doesn't help at all. People can't act upon it properly.
I still argue umb's inet6 should work absolutely as much like regular
interfaces, or it is useless. People are not going to treat this
interface differently and then gain successful inet6. If inet6 can't
work naturally and easily, but instead is a special snowflake, that
is just plain dumb.
Gerhard Roth <gerhard_r...@genua.de> wrote:
On 4/30/20 4:03 PM, Theo de Raadt wrote:
Is that still the true behaviour? I think it isn't, the "before up"
aspect is gone isn't it?
That's right for IP configuration via MBIM and I deleted the "before
up" from the first sentence.
But wasn't sure for the SLAAC case. Will autoconf work if I set the
flag after the interface is up? Should I delete the "before up" here,
too?
Gerhard
+.Pp
+To use IPv6, configure a link-local address.
+If the device is able to connect to the ISP's network but doesn't
+show an IPv6 address, setting the
+.Sy AUTOCONF6
+flag on the interface before bringing it up may help.
+.Ed
