On Mon, Aug 19, 2019 at 4:20 PM Yegor Yefremov <yegorsli...@googlemail.com> wrote: > > On Mon, Aug 19, 2019 at 2:57 PM Bjørn Mork <bj...@mork.no> wrote: > > > > Yegor Yefremov <yegorsli...@googlemail.com> writes: > > > On Mon, Aug 19, 2019 at 10:49 AM Bjørn Mork <bj...@mork.no> wrote: > > >> Yegor Yefremov <yegorsli...@googlemail.com> writes: > > >> > > >> > I have a project where I'm using dhcpcd client. It is working without > > >> > any problems with older modems like Quectel UC20 etc. But now we want > > >> > to switch to SIM7600G-H and it is working in raw-ip mode. So far only > > >> > udhcpc can handle such MAC address-less interfaces. > > >> > > > >> > Do you know what is so special about udhcpc compared to other DHCP > > >> > clients? > > >> > > >> It's mostly L2 agnostic, meaning that it will work on non-ethernet > > >> interfaces. > > >> > > >> "Fixing" this for other clients isn't really that hard, if required. I > > >> did this proof-of-concept for ISC dhclient for example: > > >> > > >> > > >> https://mail.gnome.org/archives/networkmanager-list/2015-December/msg00044.html > > > > > > Thanks for the patch. But looks like it hasn't been upstreamed yet :-( > > > > Upstreaming anything to ISC is not possible in my experience. See > > https://lists.isc.org/pipermail/dhcp-users/2011-August/013926.html > > > > Or at least not worth the extra effort required. > > > > And I don't think raw-ip support is all that useful, to be honest. The > > DHCP server in the modem is a hack anyway. You should use the modem > > management channel to get IP config from the modem. I.e. QMI. > > How one supposed to set the IP configuration via QMI? I can connect using: > > qmicli --device=/dev/cdc-wdm0 --device-open-proxy > --wds-start-network="ip-type=4,apn=www.bla.com" > --client-no-release-cid > > and get IP config via: > > # qmicli -d /dev/cdc-wdm0 --device-open-proxy > --wds-get-current-settings --client-cid=17 > [/dev/cdc-wdm0] Current settings retrieved: > IP Family: IPv4 > IPv4 address: 10.33.151.131 > IPv4 subnet mask: 255.255.255.248 > IPv4 gateway address: 10.33.151.132 > IPv4 primary DNS: 62.109.121.17 > IPv4 secondary DNS: 62.109.121.18 > MTU: 1430 > Domains: none > > How can these settings be automatically applied to wwan0? Am I missing > related MM options here? > > Yegor > > > > But DHCPv6 support on PPP links is something else. It's an essential > > feature for a DHCPv6 client. As you may or may not know, IPV6CP is very > > different from IPCP when it comes to address negotiation. It will only > > negotiate an interface-id and leave the remaining address config to the > > normal autoconf protocols. I.e. you need to run SLAAC and/or DHCPv6 on > > the link if you want a global address. > > > > Somewhat off-topic here. Unless you have a modem with support for IPv6 > > over PPP, which I recently learned actuall exists: > > https://forum.openwrt.org/t/ipv6-with-ppp-with-3g-modem/39071 > > > > I'll stop babbling now
dhcpcd also provides raw-ip support now (see the master branch). Cheers, Yegor _______________________________________________ ModemManager-devel mailing list ModemManager-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/modemmanager-devel
