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#include "common.h"
#ifdef INTERNAL_PLUGIN_NFACCT
#include <libmnl/libmnl.h>
#include <libnetfilter_acct/libnetfilter_acct.h>
struct mynfacct {
const char *name;
uint64_t pkts;
uint64_t bytes;
struct nfacct *nfacct;
};
struct nfacct_list {
int size;
int len;
struct mynfacct data[];
} *nfacct_list = NULL;
static int nfacct_callback(const struct nlmsghdr *nlh, void *data) {
if(data) {};
if(!nfacct_list || nfacct_list->len == nfacct_list->size) {
int size = (nfacct_list) ? nfacct_list->size : 0;
int len = (nfacct_list) ? nfacct_list->len : 0;
size++;
info("nfacct.plugin: increasing nfacct_list to size %d", size);
nfacct_list = reallocz(nfacct_list, sizeof(struct nfacct_list) + (sizeof(struct mynfacct) * size));
nfacct_list->data[len].nfacct = nfacct_alloc();
if(!nfacct_list->data[size - 1].nfacct) {
error("nfacct.plugin: nfacct_alloc() failed.");
free(nfacct_list);
nfacct_list = NULL;
return MNL_CB_OK;
}
nfacct_list->size = size;
nfacct_list->len = len;
}
if(nfacct_nlmsg_parse_payload(nlh, nfacct_list->data[nfacct_list->len].nfacct) < 0) {
error("nfacct.plugin: nfacct_nlmsg_parse_payload() failed.");
return MNL_CB_OK;
}
nfacct_list->data[nfacct_list->len].name = nfacct_attr_get_str(nfacct_list->data[nfacct_list->len].nfacct, NFACCT_ATTR_NAME);
nfacct_list->data[nfacct_list->len].pkts = nfacct_attr_get_u64(nfacct_list->data[nfacct_list->len].nfacct, NFACCT_ATTR_PKTS);
nfacct_list->data[nfacct_list->len].bytes = nfacct_attr_get_u64(nfacct_list->data[nfacct_list->len].nfacct, NFACCT_ATTR_BYTES);
nfacct_list->len++;
return MNL_CB_OK;
}
void *nfacct_main(void *ptr) {
struct netdata_static_thread *static_thread = (struct netdata_static_thread *)ptr;
info("NFACCT thread created with task id %d", gettid());
if(pthread_setcanceltype(PTHREAD_CANCEL_DEFERRED, NULL) != 0)
error("nfacct.plugin: Cannot set pthread cancel type to DEFERRED.");
if(pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, NULL) != 0)
error("nfacct.plugin: Cannot set pthread cancel state to ENABLE.");
char buf[MNL_SOCKET_BUFFER_SIZE];
struct mnl_socket *nl = NULL;
struct nlmsghdr *nlh = NULL;
unsigned int seq = 0, portid = 0;
seq = now_realtime_sec() - 1;
nl = mnl_socket_open(NETLINK_NETFILTER);
if(!nl) {
error("nfacct.plugin: mnl_socket_open() failed");
goto cleanup;
}
if(mnl_socket_bind(nl, 0, MNL_SOCKET_AUTOPID) < 0) {
error("nfacct.plugin: mnl_socket_bind() failed");
goto cleanup;
}
portid = mnl_socket_get_portid(nl);
// ------------------------------------------------------------------------
struct timeval last, now;
usec_t usec = 0, susec = 0;
RRDSET *st = NULL;
now_realtime_timeval(&last);
// ------------------------------------------------------------------------
while(1) {
if(unlikely(netdata_exit)) break;
seq++;
nlh = nfacct_nlmsg_build_hdr(buf, NFNL_MSG_ACCT_GET, NLM_F_DUMP, seq);
if(!nlh) {
error("nfacct.plugin: nfacct_nlmsg_build_hdr() failed");
goto cleanup;
}
if(mnl_socket_sendto(nl, nlh, nlh->nlmsg_len) < 0) {
error("nfacct.plugin: mnl_socket_send");
goto cleanup;
}
if(nfacct_list) nfacct_list->len = 0;
int ret;
while((ret = mnl_socket_recvfrom(nl, buf, sizeof(buf))) > 0) {
if((ret = mnl_cb_run(buf, ret, seq, portid, nfacct_callback, NULL)) <= 0) break;
}
if (ret == -1) {
error("nfacct.plugin: error communicating with kernel.");
goto cleanup;
}
// --------------------------------------------------------------------
now_realtime_timeval(&now);
usec = dt_usec(&now, &last) - susec;
debug(D_NFACCT_LOOP, "nfacct.plugin: last loop took %llu usec (worked for %llu, sleeped for %llu).", usec + susec, usec, susec);
if(usec < (rrd_update_every * 1000000ULL / 2ULL)) susec = (rrd_update_every * 1000000ULL) - usec;
else susec = rrd_update_every * 1000000ULL / 2ULL;
// --------------------------------------------------------------------
if(nfacct_list && nfacct_list->len) {
int i;
st = rrdset_find_bytype("netfilter", "nfacct_packets");
if(!st) {
st = rrdset_create("netfilter", "nfacct_packets", NULL, "nfacct", NULL, "Netfilter Accounting Packets", "packets/s", 3206, rrd_update_every, RRDSET_TYPE_STACKED);
for(i = 0; i < nfacct_list->len ; i++)
rrddim_add(st, nfacct_list->data[i].name, NULL, 1, rrd_update_every, RRDDIM_INCREMENTAL);
}
else rrdset_next(st);
for(i = 0; i < nfacct_list->len ; i++) {
RRDDIM *rd = rrddim_find(st, nfacct_list->data[i].name);
if(!rd) rd = rrddim_add(st, nfacct_list->data[i].name, NULL, 1, rrd_update_every, RRDDIM_INCREMENTAL);
if(rd) rrddim_set_by_pointer(st, rd, nfacct_list->data[i].pkts);
}
rrdset_done(st);
// ----------------------------------------------------------------
st = rrdset_find_bytype("netfilter", "nfacct_bytes");
if(!st) {
st = rrdset_create("netfilter", "nfacct_bytes", NULL, "nfacct", NULL, "Netfilter Accounting Bandwidth", "kilobytes/s", 3207, rrd_update_every, RRDSET_TYPE_STACKED);
for(i = 0; i < nfacct_list->len ; i++)
rrddim_add(st, nfacct_list->data[i].name, NULL, 1, 1000 * rrd_update_every, RRDDIM_INCREMENTAL);
}
else rrdset_next(st);
for(i = 0; i < nfacct_list->len ; i++) {
RRDDIM *rd = rrddim_find(st, nfacct_list->data[i].name);
if(!rd) rd = rrddim_add(st, nfacct_list->data[i].name, NULL, 1, 1000 * rrd_update_every, RRDDIM_INCREMENTAL);
if(rd) rrddim_set_by_pointer(st, rd, nfacct_list->data[i].bytes);
}
rrdset_done(st);
}
// --------------------------------------------------------------------
usleep(susec);
// copy current to last
memmove(&last, &now, sizeof(struct timeval));
}
cleanup:
info("NFACCT thread exiting");
if(nl) mnl_socket_close(nl);
static_thread->enabled = 0;
pthread_exit(NULL);
return NULL;
}
#endif
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