On 30/11/10 16:18, Dirk wrote: > Hello, > > > We are developing some some more advanced TCP rate shaping algorithms > ( http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=1261834&tag=1 ) > and would like to implement it as a (GPL) kernel module. The goal is > to have a high performant module that can 'shape' traffic for 10 000's > of hosts and users on individual base and also minimize shaping > overhead (drop/retransmits/latency) on the network. > > Our current solution uses a custom developed iptables target that > already performs traffic policing for 10'000s of simultaneous users ( > http://tnc2007.terena.org/programme/presentations/showbeb6.html ). > Since policing is not an ideal way to regulate bandwidth, we want to > improve it :-) > > > However, in order to function correctly, we need to keep some extra > information for each flow (both tcp and udp) through the device: > - few statistics (two 64bit integers) > - shaping/rate state information (four 64bit integers) > > This information should be set/accessible from a kernel tc qdisc module. > > My idea was to use the connection tracking framework to keep track of > connection states (which is also required by the algorithms) and > somehow extend it to also store the extra information. > > I have found there is an extension infrastructure for nf_conntrack ( > http://www.mail-archive.com/git-commits-head@xxxxxxxxxxxxxxx/msg15798.html > ), but it does not seem a module is intended to register itself > without modifying nf_ct_ext_id in /nf_conntrack_extend.h. Since that > would require a kernel recompile, it is not really an option. > > Since we're not (yet) familiar with the connection tracking code: what > would be the best way to accomplish this? Then, you should do similar to this patch to add a new ct extension in kernel-space: http://www.spinics.net/lists/netfilter-devel/msg15320.html -- To unsubscribe from this list: send the line "unsubscribe netfilter-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
