From: Jim Darby <uberscubajim@gmail.com>
To: "Jason A. Donenfeld" <Jason@zx2c4.com>
Cc: WireGuard mailing list <wireguard@lists.zx2c4.com>
Subject: Re: Timing issue (?) with wg-quick up on Raspberry Pi B+
Date: Sun, 10 Sep 2017 16:08:48 +0100 [thread overview]
Message-ID: <a96000f1-25ac-03c0-5f07-5a9e0d09d485@gmail.com> (raw)
In-Reply-To: <CAHmME9qEcQhsCSGxXydOkcJYjWJYw89_36KSuswHPyCu9ixtpg@mail.gmail.com>
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The plot thickens! Here's the output from ip monitor all:
[NETCONF]ipv4 dev wg0 forwarding on rp_filter strict mc_forwarding 0
proxy_neigh off
[NETCONF]ipv6 dev wg0 forwarding off mc_forwarding 0 proxy_neigh off
[LINK]27: wg0: <POINTOPOINT,NOARP,200000> mtu 1420 qdisc noop state
DOWN group default
link/none
[ADDR]27: wg0 inet 192.168.2.3/32 scope global wg0
valid_lft forever preferred_lft forever
[ROUTE]local 192.168.2.3 dev wg0 table local proto kernel scope
host src 192.168.2.3
[ADDR]Deleted 27: wg0 inet 192.168.2.3/32 scope global wg0
valid_lft forever preferred_lft forever
[ROUTE]Deleted local 192.168.2.3 dev wg0 table local proto kernel
scope host src 192.168.2.3
[LINK]27: wg0: <POINTOPOINT,NOARP,UP,LOWER_UP> mtu 1420 qdisc
noqueue state UNKNOWN group default
link/none
[ROUTE]ff00::/8 dev wg0 table local metric 256
[LINK]27: wg0: <POINTOPOINT,NOARP,UP,LOWER_UP> mtu 1420 state UNKNOWN
link/none
[LINK]27: wg0: <POINTOPOINT,NOARP,UP,LOWER_UP> mtu 1420 qdisc
noqueue state UNKNOWN group default
link/none
[ROUTE]192.168.2.0/24 dev wg0 scope link
The route delete on the sixth line is most interesting. I wonder where
it came from? I'll try it one some Debian 8 machines and see what
happens. So far it's /only/ Debain 9 that seems to have the issue.
Jim.
On 10/09/17 15:26, Jason A. Donenfeld wrote:
> On Sun, Sep 10, 2017 at 3:09 PM, Jim Darby <uberscubajim@gmail.com> wrote:
>> However, your comment about network management daemons running is most
>> interesting. Here's an extract from journalctl's output:
>> Sep 09 21:31:28 janus ifplugd(wg0)[6903]: Executing
>> '/etc/ifplugd/ifplugd.action wg0 up'.
>> Sep 09 21:31:28 janus ifplugd(wg0)[6903]: client: Ignoring unknown interface
>> wg0=wg0.
> That is interesting. Thanks for that. Indeed it looks like ifplugd is
> just calling ifup wg0, and I'm not totally sure why that would remove
> an IP address if there's nothing in /etc/network/interfaces, though
> I'm not a huge Debian person so there could be a detail I'm
> overlooking.
>
> Another more direct way that might help debug this is `ip monitor
> all`. On my (working) system, running `ip monitor all` in one window
> and `wg-quick up martino` in another yields this:
>
> [NETCONF]ipv4 dev martino forwarding off rp_filter loose mc_forwarding
> off proxy_neigh off ignore_routes_with_linkdown off
> [NETCONF]ipv6 dev martino forwarding off mc_forwarding off proxy_neigh
> off ignore_routes_with_linkdown off
> [LINK]107: martino: <POINTOPOINT,NOARP,200000> mtu 1420 qdisc noop
> state DOWN group default
> link/none
> [ADDR]107: martino inet 10.10.11.100/32 scope global martino
> valid_lft forever preferred_lft forever
> [ROUTE]local 10.10.11.100 dev martino table local proto kernel scope
> host src 10.10.11.100
> [ROUTE]ff00::/8 dev martino table local metric 256 linkdown pref medium
> [ROUTE]2a01:e35:8be7:9122:100::/96 dev martino proto kernel metric 256
> linkdown pref medium
> [ADDR]107: martino inet6 2a01:e35:8be7:9122:100::1/96 scope global
> valid_lft forever preferred_lft forever
> [ROUTE]local 2a01:e35:8be7:9122:100::1 dev lo table local proto kernel
> metric 0 pref medium
> [LINK]107: martino: <POINTOPOINT,NOARP,UP,LOWER_UP> mtu 1420 qdisc
> noqueue state UNKNOWN group default
> link/none
> [ROUTE]default dev martino table 51820 metric 1024 pref medium
> [RULE]32765: not from all fwmark 0xca6c lookup 51820
> [RULE]32764: from all lookup main suppress_prefixlength 0
> [ROUTE]default dev martino table 51820 scope link
> [RULE]32765: not from all fwmark 0xca6c lookup 51820
> [RULE]32764: from all lookup main suppress_prefixlength 0
>
> If I then type in `ip addr flush dev martino`, I get this:
>
> [ADDR]Deleted 107: martino inet 10.10.11.100/32 scope global martino
> valid_lft forever preferred_lft forever
> [ROUTE]Deleted local 10.10.11.100 dev martino table local proto kernel
> scope host src 10.10.11.100
> [NEIGH]Deleted 10.10.11.1 dev martino lladdr 08 NOARP
> [NEIGH]Deleted 66.102.1.127 dev martino lladdr 08 NOARP
> [NEIGH]Deleted 52.205.56.176 dev martino lladdr 08 NOARP
> [ADDR]Deleted 107: martino inet6 2a01:e35:8be7:9122:100::1/96 scope global
> valid_lft forever preferred_lft forever
> [ROUTE]Deleted local 2a01:e35:8be7:9122:100::1 dev lo table local
> proto kernel metric 0 pref medium
> [ROUTE]Deleted 2a01:e35:8be7:9122:100::/96 dev martino proto kernel
> metric 256 pref medium
>
> So, it remains to be seen whether or not something else in userspace
> is actually interacting with the interface. Once we figure out what,
> we might be able to monitor all callers of those netlink commands.
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next prev parent reply other threads:[~2017-09-10 14:42 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-09-10 11:34 Jim Darby
2017-09-10 12:44 ` Jason A. Donenfeld
2017-09-10 13:09 ` Jim Darby
2017-09-10 14:26 ` Jason A. Donenfeld
2017-09-10 15:08 ` Jim Darby [this message]
2017-09-10 22:25 ` Jason A. Donenfeld
2017-09-10 22:30 ` Jason A. Donenfeld
2017-09-10 23:23 ` Jim Darby
2017-09-11 0:52 ` Jason A. Donenfeld
2017-09-11 12:35 ` Jim Darby
2017-09-11 12:37 ` Jason A. Donenfeld
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