dhcpcd-discuss

On 22/04/2020 11:19, Tor Rune Skoglund wrote:
> > So by default, dhcpcd won't work on POINTOPOINT interfaces without some kind 
> > of config.
> > putting this at the top of /etc/dhcpcd.conf might fix it for you:
> > allowinterfaces wwp*
>
> I just tried this, and still to no avail. Here's the test case. The starting 
> point is a newly booted system with dhcpcd running in the background. enp1s0 
> (cable) has received an ip address, and wwp* not - as expected - since the 
> mobile connection is not started yet.
>
> head -n 10 /etc/dhcpcd.conf
> # A sample configuration for dhcpcd.
> # See dhcpcd.conf(5) for details.
>
> # ww* is disabled from P2P by default. Also, need to add other interfaces as
> # they will not be enabled by default when allowinterfaces is present.
> allowinterfaces ww* en* wl*
>
> # Trying to enable dhcp for all interfaces globally. Does not seem to work? 
> Needs to be set per interface?
> dhcp
>
> # Setting it on the interface directly for testing. (Problem for later: We do 
> not necessarily know the interface name on beforehand.)
> tail -n 4 /etc/dhcpcd.conf
>
> interface wwp0s20u5u1i8
> dhcp
>
> # Taking link down to be able to switch to raw-ip
> ip link set dev wwp0s20u5u1i8 down
>
> # Switching system to raw-ip
> qmicli -d /dev/cdc-wdm0 --set-expected-data-format=raw-ip -p
> [/dev/cdc-wdm0] expected data format set to: raw-ip
>
> # Making sure that the card is in raw-ip mode
> qmicli -d /dev/cdc-wdm0 --wda-get-data-format -p
> [/dev/cdc-wdm0] Successfully got data format
>                     QoS flow header: no
>                 Link layer protocol: 'raw-ip'
>    Uplink data aggregation protocol: 'disabled'
> Downlink data aggregation protocol: 'disabled'
>                       NDP signature: '0'
>    Uplink data aggregation max size: '0'
> Downlink data aggregation max size: '0'
>
> # Starting the network
> qmicli -d /dev/cdc-wdm0 --wds-start-network=ip-type=4 -p --client-no-release-cid
> [/dev/cdc-wdm0] Network started
>          Packet data handle: '1137719400'
> [/dev/cdc-wdm0] Client ID not released:
>          Service: 'wds'
>              CID: '9'
>
> # Checking that it did connect
> qmicli -d /dev/cdc-wdm0 --wds-get-current-settings -p
> [/dev/cdc-wdm0] Current settings retrieved:
>             IP Family: IPv4
>          IPv4 address: 10.214.215.169
>      IPv4 subnet mask: 255.255.255.252
> IPv4 gateway address: 10.214.215.170
>      IPv4 primary DNS: 193.213.112.4
>    IPv4 secondary DNS: 130.67.15.198
>                   MTU: 1430
>               Domains: none
>
> # Up'ing the interface again
> ip link set dev wwp0s20u5u1i8 up
>
> Messages in syslog when doing that:
>
> Apr 22 09:37:21 platform dhcpcd[2221]: wwp0s20u5u1i8: carrier acquired
> Apr 22 09:37:21 platform dhcpcd[2221]: wwp0s20u5u1i8: IAID 9a:60:5f:91
> Apr 22 09:37:22 platform dhcpcd[2221]: wwp0s20u5u1i8: soliciting a DHCP lease
>
> And that's it. At this point, I would have expected the interface to receive the 
> address.
>
> However, when running the same procedure *without* dhcpcd already running in the 
> background, and then running:
>
> dhcpcd wwp0s20u5u1i8
> DUID 00:01:00:01:1a:82:6f:53:08:00:27:00:9e:58
> wwp0s20u5u1i8: IAID 00:00:00:05
> wwp0s20u5u1i8: soliciting a DHCP lease
> wwp0s20u5u1i8: offered 10.214.215.169 from 10.214.215.170
> wwp0s20u5u1i8: leased 10.214.215.169 for 7200 seconds
> wwp0s20u5u1i8: adding route to 10.214.215.168/30
> wwp0s20u5u1i8: adding default route via 10.214.215.170
> forked to background, child pid 6814
>
> works.
>
> Any suggestions what I might be doing wrong? In dhcpcd.conf we have xidhwaddr 
> and noipv4ll enabled in addition to Gentoo's defaults.

Can you add this to dhcpcd.conf please?

debug
logfile /var/log/dhcpcd.log

Redo the test. After uping the interface, wait for a minute and then email the 
whole file please.

Roy