Hi Alfredo I tried your suggestions and they work fine! I have another question. Is it possible to know master interfaces indexes (i.e. indexes of dna0 and dna1, for example) from a "slave" handle? In the pfdnacluster_multithread and pfdnabounce examples, these indexes are saved from the master thread into global variables and so the slaves threads are able to read them. In our test-case, master and slaves are different processes: how are the slaves able to know the indexes to use in the pfring_set_pkt_buff_ifindex() calls? Must they have a reference to interface names and use something like if_nametoindex()?
Thanks for your support! Ivan On 5 August 2013 13:58, Alfredo Cardigliano <[email protected]> wrote: > No, you can't use the same pfring "slave" handle in different threads at > the same time. > > Alfredo > > > On Aug 5, 2013, at 1:55 PM, Ivan Nardi <[email protected]> wrote: > > Hi Alfredo, > > Thanks for your fast replay! > I'll have a look at it, thanks! > > Another question: are these functions "thread safe", i.e. can I send my > pkts from another thread respect the thread reading from the cluster? > Best Regards > > I > van > > > > On 5 August 2013 13:09, Alfredo Cardigliano <[email protected]> wrote: > >> Hi Ivan >> you should reserve per-slave buffers (see the 3rd parameter of >> dna_cluster_low_level_settings()) for allocation >> via pfring_alloc_pkt_buff(). >> Your code should look like this: >> >> tmp_pkt_handle = pfring_alloc_pkt_buff(ring[slave_id]) >> >> while (1) { >> pfring_recv_pkt_buff(pd, pkt_handle, ...); >> /* analyze pkt */ >> pfring_set_pkt_buff_ifindex(ring[slave_id], pkt_handle, out_index); >> pfring_send_pkt_buff(ring[slave_id], pkt_handle,...); >> >> if (condition) { >> buffer = pfring_get_pkt_buff_data(ring[slave_id], tmp_pkt_handle); >> create_new_pkt(buffer); >> pfring_set_pkt_buff_ifindex(ring[slave_id], tmp_pkt_handle, >> out_index); >> pfring_send_pkt_buff(ring[slave_id], tmp_pkt_handle,...); >> } >> } >> >> Best Regards >> Alfredo >> >> On Aug 5, 2013, at 12:56 PM, Ivan Nardi <[email protected]> wrote: >> >> Hi guys. >> >> We are using libzero with dna-cluster to analyze and forwarding|bouncing >> packets. >> We would like to send through the cluster some packets created by >> ourselves too, other than the captured ones. >> Something like that (in pseudo-code): >> >> while (1) { >> pfring_recv_pkt_buff(pd, pkt_handle, ...); >> /* analyze pkt */ >> pfring_set_pkt_buff_ifindex(pd, pkt_handle, out_index); >> pfring_send_pkt_buff(pd, pkt_handle,...); >> >> if (condition) { >> data = create_new_pkt(...); >> send_data_through_cluster(pd, data, out_index2) >> } >> } >> >> Which is the best way to do it? >> Can we use the standard function pfring_send_ifindex() even with cluster? >> Is there a better way? >> Thanks in advance! >> >> Ivan >> _______________________________________________ >> Ntop-dev mailing list >> [email protected] >> http://listgateway.unipi.it/mailman/listinfo/ntop-dev >> >> >> >> _______________________________________________ >> Ntop-dev mailing list >> [email protected] >> http://listgateway.unipi.it/mailman/listinfo/ntop-dev >> >> > _______________________________________________ > Ntop-dev mailing list > [email protected] > http://listgateway.unipi.it/mailman/listinfo/ntop-dev > > > > _______________________________________________ > Ntop-dev mailing list > [email protected] > http://listgateway.unipi.it/mailman/listinfo/ntop-dev > >
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