Re: [libtorrent] arp request send to softether interface unexpectedly

[Xuefer <xu...@gm...>]

Thanks for the working workaround, but I have to use LtConfig to enable
this setting. set listen_interfaces to eth1:40001 (beside 192.168.1.1:40001)

however the unexpected phenomenon should be investigated

On Tue, Feb 8, 2022 at 7:19 PM Arvid Norberg <arv...@gm...>
wrote:

> libtorrent will attempt to listen on all your interfaces by default. If you
> want it to use specific ones, configure `listen_interfaces` with a
> comma-separated list of IP addresses or device names.
>
> On Tue, Feb 8, 2022 at 10:50 AM Xuefer <xu...@gm...> wrote:
>
> > Deluge 2.0.4-git-20210801
> >    libtorrent: 1.2.15.0   run on openwrt
> >
> > /etc/config/network:
> > config interface 'moovpnse'
> >         option proto 'static'
> >         option metric '9999'
> >         option device 'tap_moovpnse'
> >         list ipaddr '172.16.2.1/24'
> >
> > config route
> >         option interface 'moovpnse'
> >         option target '1.1.1.1'
> >         option netmask '255.255.255.255'
> >         option gateway '172.16.2.9'
> > (tap_moovpnse  is the softether interface)
> >
> > # ip r s all
> > default via 192.168.126.1 dev eth1 proto static metric 999
> > 1.1.1.1 via 172.16.2.9 dev tap_moovpnse proto static metric 9999
> > 172.16.2.0/24 dev tap_moovpnse proto static scope link metric 9999
> > 172.16.26.0/24 dev br-lan proto kernel scope link src 172.16.26.1
> > 172.16.101.0/24 dev emuwin10 proto kernel scope link src 172.16.101.1
> > 192.168.0.0/16 dev br-neighbor proto kernel scope link src 192.168.26.2
> > 192.168.126.0/24 dev eth1 proto static scope link metric 999
> >
> > # tcpdump -ni tap_moovpnse
> > tcpdump: verbose output suppressed, use -v or -vv for full protocol
> decode
> > listening on tap_moovpnse, link-type EN10MB (Ethernet), capture size
> 262144
> > bytes
> > 17:44:36.748707 ARP, Request who-has 120.231.136.57 tell 172.16.2.1,
> length
> > 28
> > 17:44:37.819813 ARP, Request who-has 120.231.136.57 tell 172.16.2.1,
> length
> > 28
> > 17:44:38.009975 ARP, Request who-has 151.80.120.112 tell 172.16.2.1,
> length
> > 28
> > 17:44:38.859949 ARP, Request who-has 120.231.136.57 tell 172.16.2.1,
> length
> > 28
> > 17:44:39.019785 ARP, Request who-has 151.80.120.112 tell 172.16.2.1,
> length
> > 28
> > 17:44:40.059795 ARP, Request who-has 151.80.120.112 tell 172.16.2.1,
> length
> > 28
> >
> > this is strange, route table shows none of those 120* 151.* range belong
> to
> > interface tap_moovpnse, but it send arp to tap_moovpnse asking for mac
> > address of these IPs
> >
> > These strange arp requests are not sent if either 1. remove all "config
> > route"  sections to moovpnse followed by a "ifup tap_moovpnse" ,or 2.
> stop
> > deluge
> >
> > can anyone help me figure out why
> >
> > _______________________________________________
> > Libtorrent-discuss mailing list
> > Lib...@li...
> > https://lists.sourceforge.net/lists/listinfo/libtorrent-discuss
> >
>
>
> --
> Arvid Norberg
>
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