Re: [PATCH net-next v7] selftests: net: add tests for PPP

[Qingfang Deng]

Hi,

On Wed, Apr 1, 2026 at 11:10 PM Jakub Kicinski <kuba@xxxxxxxxxx> wrote:
>
> On Mon, 30 Mar 2026 11:55:44 +0800 Qingfang Deng wrote:
> > Add ping and iperf3 tests for ppp_async.c and pppoe.c.
>
> Hi! I added the new TARGET to netdev CI, the pppoe.sh test does not
> seem happy:
>
> # timeout set to 45
> # selftests: net/ppp: pppoe.sh
> # Plugin pppoe.so loaded.
> # PPPoE plugin from pppd 2.5.1
> # Send PPPOE Discovery V1T1 PADI session 0x0 length 12
> #  dst ff:ff:ff:ff:ff:ff  src b2:36:d8:0d:61:83
> #  [service-name] [host-uniq 9b 08 00 00]
> # Recv PPPOE Discovery V1T1 PADO session 0x0 length 73
> #  dst b2:36:d8:0d:61:83  src 4e:f5:66:23:13:38
> #  [AC-name vmksft-net-extra,debug-threads=on] [service-name] [AC-cookie e5 e4 8c f0 87 72 d8 3a 60 66 4e 32 e4 ee af 6f 9a 08 00 00] [host-uniq 9b 08 00 00]
> # Send PPPOE Discovery V1T1 PADR session 0x0 length 36
> #  dst 4e:f5:66:23:13:38  src b2:36:d8:0d:61:83
> #  [service-name] [host-uniq 9b 08 00 00] [AC-cookie e5 e4 8c f0 87 72 d8 3a 60 66 4e 32 e4 ee af 6f 9a 08 00 00]
> # Recv PPPOE Discovery V1T1 PADS session 0x1 length 12
> #  dst b2:36:d8:0d:61:83  src 4e:f5:66:23:13:38
> #  [service-name] [host-uniq 9b 08 00 00]
> # PPP session is 1
> # Connected to 4E:F5:66:23:13:38 via interface veth-client
> # using channel 1
> # Using interface ppp0
> # Connect: ppp0 <--> veth-client
> # sent [LCP ConfReq id=0x1 <mru 1492> <magic 0x6db8fab4>]
> # Modem hangup
> # Connection terminated.
> # Send PPPOE Discovery V1T1 PADT session 0x1 length 32
> #  dst 4e:f5:66:23:13:38  src b2:36:d8:0d:61:83
> #  [host-uniq 9b 08 00 00] [AC-cookie e5 e4 8c f0 87 72 d8 3a 60 66 4e 32 e4 ee af 6f 9a 08 00 00]
> # Sent PADT
> # ping: connect: Network is unreachable
> # iperf3: error - unable to connect to server - server may have stopped running or use a different port, firewall issue, etc.: Network is unreachable
> # TEST: PPPoE                                                         [FAIL]
> not ok 1 selftests: net/ppp: pppoe.sh # exit=1

It looks like pppoe-server fails to start. You may check the syslog to
see what's going on.

Regards,
Qingfang