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#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdio.h>
#include <stdlib.h>
#include "common.h"
#include "appconfig.h"
#include "procfile.h"
#include "rrd.h"
#include "plugin_proc.h"
#include "log.h"
#define RRD_TYPE_NET_STAT_NETFILTER "netfilter"
#define RRD_TYPE_NET_STAT_SYNPROXY "synproxy"
#define RRD_TYPE_NET_STAT_SYNPROXY_LEN strlen(RRD_TYPE_NET_STAT_SYNPROXY)
int do_proc_net_stat_synproxy(int update_every, unsigned long long dt) {
static int do_entries = -1, do_cookies = -1, do_syns = -1, do_reopened = -1;
static procfile *ff = NULL;
if(do_entries == -1) do_entries = config_get_boolean_ondemand("plugin:proc:/proc/net/stat/synproxy", "SYNPROXY entries", CONFIG_ONDEMAND_ONDEMAND);
if(do_cookies == -1) do_cookies = config_get_boolean_ondemand("plugin:proc:/proc/net/stat/synproxy", "SYNPROXY cookies", CONFIG_ONDEMAND_ONDEMAND);
if(do_syns == -1) do_syns = config_get_boolean_ondemand("plugin:proc:/proc/net/stat/synproxy", "SYNPROXY SYN received", CONFIG_ONDEMAND_ONDEMAND);
if(do_reopened == -1) do_reopened = config_get_boolean_ondemand("plugin:proc:/proc/net/stat/synproxy", "SYNPROXY connections reopened", CONFIG_ONDEMAND_ONDEMAND);
if(dt) {};
if(!ff) {
char filename[FILENAME_MAX + 1];
snprintfz(filename, FILENAME_MAX, "%s%s", global_host_prefix, "/proc/net/stat/synproxy");
ff = procfile_open(config_get("plugin:proc:/proc/net/stat/synproxy", "filename to monitor", filename), " \t,:|", PROCFILE_FLAG_DEFAULT);
}
if(!ff) return 1;
ff = procfile_readall(ff);
if(!ff) return 0; // we return 0, so that we will retry to open it next time
// make sure we have 3 lines
unsigned long lines = procfile_lines(ff), l;
if(lines < 2) {
error("/proc/net/stat/synproxy has %d lines, expected no less than 2. Disabling it.", lines);
return 1;
}
unsigned long long entries = 0, syn_received = 0, cookie_invalid = 0, cookie_valid = 0, cookie_retrans = 0, conn_reopened = 0;
// synproxy gives its values per CPU
for(l = 1; l < lines ;l++) {
int words = procfile_linewords(ff, l);
if(words < 6) continue;
entries += strtoull(procfile_lineword(ff, l, 0), NULL, 16);
syn_received += strtoull(procfile_lineword(ff, l, 1), NULL, 16);
cookie_invalid += strtoull(procfile_lineword(ff, l, 2), NULL, 16);
cookie_valid += strtoull(procfile_lineword(ff, l, 3), NULL, 16);
cookie_retrans += strtoull(procfile_lineword(ff, l, 4), NULL, 16);
conn_reopened += strtoull(procfile_lineword(ff, l, 5), NULL, 16);
}
unsigned long long events = entries + syn_received + cookie_invalid + cookie_valid + cookie_retrans + conn_reopened;
RRDSET *st;
// --------------------------------------------------------------------
if((do_entries == CONFIG_ONDEMAND_ONDEMAND && events) || do_entries == CONFIG_ONDEMAND_YES) {
do_entries = CONFIG_ONDEMAND_YES;
st = rrdset_find(RRD_TYPE_NET_STAT_NETFILTER "." RRD_TYPE_NET_STAT_SYNPROXY "_entries");
if(!st) {
st = rrdset_create(RRD_TYPE_NET_STAT_NETFILTER, RRD_TYPE_NET_STAT_SYNPROXY "_entries", NULL, RRD_TYPE_NET_STAT_SYNPROXY, NULL, "SYNPROXY Entries Used", "entries", 1004, update_every, RRDSET_TYPE_LINE);
rrddim_add(st, "entries", NULL, 1, 1, RRDDIM_ABSOLUTE);
}
else rrdset_next(st);
rrddim_set(st, "entries", entries);
rrdset_done(st);
}
// --------------------------------------------------------------------
if((do_syns == CONFIG_ONDEMAND_ONDEMAND && events) || do_syns == CONFIG_ONDEMAND_YES) {
do_syns = CONFIG_ONDEMAND_YES;
st = rrdset_find(RRD_TYPE_NET_STAT_NETFILTER "." RRD_TYPE_NET_STAT_SYNPROXY "_syn_received");
if(!st) {
st = rrdset_create(RRD_TYPE_NET_STAT_NETFILTER, RRD_TYPE_NET_STAT_SYNPROXY "_syn_received", NULL, RRD_TYPE_NET_STAT_SYNPROXY, NULL, "SYNPROXY SYN Packets received", "SYN/s", 1001, update_every, RRDSET_TYPE_LINE);
rrddim_add(st, "received", NULL, 1, 1, RRDDIM_INCREMENTAL);
}
else rrdset_next(st);
rrddim_set(st, "received", syn_received);
rrdset_done(st);
}
// --------------------------------------------------------------------
if((do_reopened == CONFIG_ONDEMAND_ONDEMAND && events) || do_reopened == CONFIG_ONDEMAND_YES) {
do_reopened = CONFIG_ONDEMAND_YES;
st = rrdset_find(RRD_TYPE_NET_STAT_NETFILTER "." RRD_TYPE_NET_STAT_SYNPROXY "_conn_reopened");
if(!st) {
st = rrdset_create(RRD_TYPE_NET_STAT_NETFILTER, RRD_TYPE_NET_STAT_SYNPROXY "_conn_reopened", NULL, RRD_TYPE_NET_STAT_SYNPROXY, NULL, "SYNPROXY Connections Reopened", "connections/s", 1003, update_every, RRDSET_TYPE_LINE);
rrddim_add(st, "reopened", NULL, 1, 1, RRDDIM_INCREMENTAL);
}
else rrdset_next(st);
rrddim_set(st, "reopened", conn_reopened);
rrdset_done(st);
}
// --------------------------------------------------------------------
if((do_cookies == CONFIG_ONDEMAND_ONDEMAND && events) || do_cookies == CONFIG_ONDEMAND_YES) {
do_cookies = CONFIG_ONDEMAND_YES;
st = rrdset_find(RRD_TYPE_NET_STAT_NETFILTER "." RRD_TYPE_NET_STAT_SYNPROXY "_cookies");
if(!st) {
st = rrdset_create(RRD_TYPE_NET_STAT_NETFILTER, RRD_TYPE_NET_STAT_SYNPROXY "_cookies", NULL, RRD_TYPE_NET_STAT_SYNPROXY, NULL, "SYNPROXY TCP Cookies", "cookies/s", 1002, update_every, RRDSET_TYPE_LINE);
rrddim_add(st, "valid", NULL, 1, 1, RRDDIM_INCREMENTAL);
rrddim_add(st, "invalid", NULL, -1, 1, RRDDIM_INCREMENTAL);
rrddim_add(st, "retransmits", NULL, 1, 1, RRDDIM_INCREMENTAL);
}
else rrdset_next(st);
rrddim_set(st, "valid", cookie_valid);
rrddim_set(st, "invalid", cookie_invalid);
rrddim_set(st, "retransmits", cookie_retrans);
rrdset_done(st);
}
return 0;
}
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