1. 25 Dec, 2011 3 commits
    • David S. Miller's avatar
    • Pablo Neira Ayuso's avatar
      netfilter: xtables: add nfacct match to support extended accounting · ceb98d03
      Pablo Neira Ayuso authored
      This patch adds the match that allows to perform extended
      accounting. It requires the new nfnetlink_acct infrastructure.
      
       # iptables -I INPUT -p tcp --sport 80 -m nfacct --nfacct-name http-traffic
       # iptables -I OUTPUT -p tcp --dport 80 -m nfacct --nfacct-name http-traffic
      Signed-off-by: default avatarPablo Neira Ayuso <pablo@netfilter.org>
      ceb98d03
    • Pablo Neira Ayuso's avatar
      netfilter: add extended accounting infrastructure over nfnetlink · 94139027
      Pablo Neira Ayuso authored
      We currently have two ways to account traffic in netfilter:
      
      - iptables chain and rule counters:
      
       # iptables -L -n -v
      Chain INPUT (policy DROP 3 packets, 867 bytes)
       pkts bytes target     prot opt in     out     source               destination
          8  1104 ACCEPT     all  --  lo     *       0.0.0.0/0            0.0.0.0/0
      
      - use flow-based accounting provided by ctnetlink:
      
       # conntrack -L
      tcp      6 431999 ESTABLISHED src=192.168.1.130 dst=212.106.219.168 sport=58152 dport=80 packets=47 bytes=7654 src=212.106.219.168 dst=192.168.1.130 sport=80 dport=58152 packets=49 bytes=66340 [ASSURED] mark=0 use=1
      
      While trying to display real-time accounting statistics, we require
      to pool the kernel periodically to obtain this information. This is
      OK if the number of flows is relatively low. However, in case that
      the number of flows is huge, we can spend a considerable amount of
      cycles to iterate over the list of flows that have been obtained.
      
      Moreover, if we want to obtain the sum of the flow accounting results
      that match some criteria, we have to iterate over the whole list of
      existing flows, look for matchings and update the counters.
      
      This patch adds the extended accounting infrastructure for
      nfnetlink which aims to allow displaying real-time traffic accounting
      without the need of complicated and resource-consuming implementation
      in user-space. Basically, this new infrastructure allows you to create
      accounting objects. One accounting object is composed of packet and
      byte counters.
      
      In order to manipulate create accounting objects, you require the
      new libnetfilter_acct library. It contains several examples of use:
      
      libnetfilter_acct/examples# ./nfacct-add http-traffic
      libnetfilter_acct/examples# ./nfacct-get
      http-traffic = { pkts = 000000000000,   bytes = 000000000000 };
      
      Then, you can use one of this accounting objects in several iptables
      rules using the new nfacct match (which comes in a follow-up patch):
      
       # iptables -I INPUT -p tcp --sport 80 -m nfacct --nfacct-name http-traffic
       # iptables -I OUTPUT -p tcp --dport 80 -m nfacct --nfacct-name http-traffic
      
      The idea is simple: if one packet matches the rule, the nfacct match
      updates the counters.
      
      Thanks to Patrick McHardy, Eric Dumazet, Changli Gao for reviewing and
      providing feedback for this contribution.
      Signed-off-by: default avatarPablo Neira Ayuso <pablo@netfilter.org>
      94139027
  2. 24 Dec, 2011 2 commits
  3. 23 Dec, 2011 29 commits
  4. 22 Dec, 2011 6 commits