[PATCH alternative] ifplugd: fix netlink recv

walter harms wharms at bfs.de
Tue Jul 9 16:49:07 UTC 2013



Am 09.07.2013 16:33, schrieb Johannes Stezenbach:
> On Tue, Jul 09, 2013 at 03:53:59PM +0200, walter harms wrote:
>> Am 09.07.2013 15:08, schrieb Johannes Stezenbach:
>>> Or is there some max size guaranteed for NETLINK_ROUTE messages
>>> in group RTMGRP_LINK?  If not, then the code needs to
>>> be able to handle the max size of a netlink message.
>>
>> according to RFC the buffer size is 1024 bytes.
> 
> Which RFC?
> 

As usual i could not find the exact reference
NTL here the RFC for netlink: http://tools.ietf.org/html/rfc3549

An here the structure of netlink packet (http://qos.ittc.ku.edu/netlink/html/node16.html)
I suspect that the 1024 originate from the packet. I remember only some ascii art
with this size, sorry

// structure of the netlink packet.
struct {
 struct nlmsghdr n;
 struct rtmsg r;
 char buf[1024]; } req;


re,
 wh


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