Re: ulogd packet based logging with CT info

["Blažej Krajňák" <blazej.krajnak@gmail.com>]

st 18. 8. 2021 o 9:23 Pablo Neira Ayuso <pablo@netfilter.org> napísal(a):
> You need this kernel patch to add this information to nfnetlink_queue,
> compile-tested only.

Hey Pablo,
patch is working like a charm. Thank you! Now I see timestamps and
packets/bytes counters in JSON output correctly.
At the end I will post customized input plugin for everyone.

The last thing I want to ask is what's correct way to get

attrs[NFULA_CT]

from

struct nfulnl_msg_packet_hdr *ph = nflog_get_msg_packet_hdr(ldata);


Now I use the following code which is working but throwing random
errors "something went wrong (Numerical result out of range)" I'm
mixing struct nfulnl_msg_packet_hdr with const struct nlmsghdr *nlh


struct nfulnl_msg_packet_hdr *ph = nflog_get_msg_packet_hdr(ldata);
struct nlattr *attrs[NFULA_MAX + 1] = { NULL };
int retb;

retb = nflog_nlmsg_parse(ph, attrs);
if (retb != MNL_CB_OK) {
    printf("something went wrong");
    printf(" (%s)\n", strerror(errno));
    return retb;
}