netdev - getifaddrs

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>] [day] [month] [year] [list]

Date:	Thu, 20 Jan 2011 13:57:13 +0100
From:	Kurt Van Dijck <kurt.van.dijck@....be>
To:	netdev@...r.kernel.org, socketcan-core@...ts.berlios.de
Subject: getifaddrs

Hello,

I am in the process of adding j1939 support in the linux kernel.
J1939 is a protocol on CAN, with addressing support. Therefore,
I'm tweaking in iproute2 as well, to extend the
$ ip address
output.

I have in kernel space
	rtnl_register(PF_CAN, RTM_GETADDR, NULL, j1939_nl_dump_ifaddr);
This 'j1939_nl_dump_ifaddr' does not dump 'struct sockaddr *', but
an ad-hoc format.

After I get a basic setup working, I tried calling 'getifaddrs'.
If I do 'getifaddrs', this callback is called, but
I do not understand how glibc (or any other libc) is capable of transforming
the rtnetlink address info into proper 'struct sockaddr_can *'.

I looked at AF_INET & AF_DECnet, and it seems I'm not supposed to
dump a 'struct sockaddr_can' over rtnetlink. Is 'getifaddrs' then doomed
to only work for INET addresses only?

Any idea's?

Thanks,
Kurt
--
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