netdev - Netlink, route monitoring, RTM_DELROUTE not issued for ppp peer address. Bug or feature?

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Date:	Fri, 13 Apr 2012 15:10:34 +0300
From:	Denys Fedoryshchenko <denys@...p.net.lb>
To:	<netdev@...r.kernel.org>
Subject: Netlink, route monitoring, RTM_DELROUTE not issued for ppp peer address. Bug or feature?

Hi

I am trying to implement my own routing daemon, and using 
RTMGRP_IPV4_ROUTE to monitor routes.
I notice, that on PPPoE, when interface disappearing, RTM_DELROUTE will 
be sent to listener only for local address, but nothing about peer 
address attached to this interface.

CBSS_PPPoE ~ # ifconfig ppp0
ppp0      Link encap:Point-to-Point Protocol
           inet addr:172.16.146.1  P-t-P:172.16.146.10  
Mask:255.255.255.255
           UP POINTOPOINT RUNNING NOARP MULTICAST  MTU:1200  Metric:1
           RX packets:40439 errors:0 dropped:0 overruns:0 frame:0
           TX packets:63211 errors:0 dropped:0 overruns:0 carrier:0
           collisions:0 txqueuelen:3
           RX bytes:3584507 (3.4 MiB)  TX bytes:47180929 (44.9 MiB)

CBSS_PPPoE ~ # pppkill tek234@...p.net.lb  (this is killing pppd 
process for ppp0 interface)

ip monitor route will show only RTM_DELROUTE for RTN_LOCAL, but nothing 
about RTN_UNICAST for 172.16.146.10.
"Deleted local 172.16.146.1 dev ppp0  table local  proto kernel  scope 
host  src 172.16.146.1"
My program also receive same.

Is it a bug, that no RTM_DELROUTE issued for peer ip address? Or should 
i monitor also RTMGRP_IPV4_IFADDR for link disappearance?

Thanks for help!
--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html