mirror of
https://github.com/netdata/netdata.git
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e8d6cde97c
* Add global configuration option for zero metrics * Add the option to the cgroup plugin * Add the option to the proc plugin (diskstats, meminfo, net_dev, netstat, sctp_snmp, snmp, snmp6, sockstat, sockstat6, synproxy, vmstat, system_edac_mc, system_node, btrfs, ksm, zfs) * Add the option to the macos plugin * Add the option to the freebsd plugin (devstat, getifaddrs, getmntinfo, sysctl) * Change the option behaviour with the 'auto' value * Add the option to the tc plugin * Update the documentation
189 lines
7.4 KiB
C
189 lines
7.4 KiB
C
// SPDX-License-Identifier: GPL-3.0-or-later
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#include "plugin_proc.h"
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#define PLUGIN_PROC_MODULE_SYNPROXY_NAME "/proc/net/stat/synproxy"
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#define RRD_TYPE_NET_STAT_NETFILTER "netfilter"
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#define RRD_TYPE_NET_STAT_SYNPROXY "synproxy"
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int do_proc_net_stat_synproxy(int update_every, usec_t dt) {
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(void)dt;
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static int do_entries = -1, do_cookies = -1, do_syns = -1, do_reopened = -1;
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static procfile *ff = NULL;
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if(unlikely(do_entries == -1)) {
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do_entries = config_get_boolean_ondemand("plugin:proc:/proc/net/stat/synproxy", "SYNPROXY entries", CONFIG_BOOLEAN_AUTO);
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do_cookies = config_get_boolean_ondemand("plugin:proc:/proc/net/stat/synproxy", "SYNPROXY cookies", CONFIG_BOOLEAN_AUTO);
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do_syns = config_get_boolean_ondemand("plugin:proc:/proc/net/stat/synproxy", "SYNPROXY SYN received", CONFIG_BOOLEAN_AUTO);
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do_reopened = config_get_boolean_ondemand("plugin:proc:/proc/net/stat/synproxy", "SYNPROXY connections reopened", CONFIG_BOOLEAN_AUTO);
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}
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if(unlikely(!ff)) {
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char filename[FILENAME_MAX + 1];
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snprintfz(filename, FILENAME_MAX, "%s%s", netdata_configured_host_prefix, "/proc/net/stat/synproxy");
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ff = procfile_open(config_get("plugin:proc:/proc/net/stat/synproxy", "filename to monitor", filename), " \t,:|", PROCFILE_FLAG_DEFAULT);
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if(unlikely(!ff))
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return 1;
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}
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ff = procfile_readall(ff);
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if(unlikely(!ff))
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return 0; // we return 0, so that we will retry to open it next time
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// make sure we have 3 lines
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size_t lines = procfile_lines(ff), l;
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if(unlikely(lines < 2)) {
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error("/proc/net/stat/synproxy has %zu lines, expected no less than 2. Disabling it.", lines);
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return 1;
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}
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unsigned long long entries = 0, syn_received = 0, cookie_invalid = 0, cookie_valid = 0, cookie_retrans = 0, conn_reopened = 0;
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// synproxy gives its values per CPU
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for(l = 1; l < lines ;l++) {
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size_t words = procfile_linewords(ff, l);
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if(unlikely(words < 6))
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continue;
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entries += strtoull(procfile_lineword(ff, l, 0), NULL, 16);
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syn_received += strtoull(procfile_lineword(ff, l, 1), NULL, 16);
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cookie_invalid += strtoull(procfile_lineword(ff, l, 2), NULL, 16);
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cookie_valid += strtoull(procfile_lineword(ff, l, 3), NULL, 16);
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cookie_retrans += strtoull(procfile_lineword(ff, l, 4), NULL, 16);
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conn_reopened += strtoull(procfile_lineword(ff, l, 5), NULL, 16);
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}
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unsigned long long events = entries + syn_received + cookie_invalid + cookie_valid + cookie_retrans + conn_reopened;
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// --------------------------------------------------------------------
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if(do_entries == CONFIG_BOOLEAN_YES || (do_entries == CONFIG_BOOLEAN_AUTO &&
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(events || netdata_zero_metrics_enabled == CONFIG_BOOLEAN_YES))) {
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do_entries = CONFIG_BOOLEAN_YES;
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static RRDSET *st = NULL;
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if(unlikely(!st)) {
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st = rrdset_create_localhost(
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RRD_TYPE_NET_STAT_NETFILTER
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, RRD_TYPE_NET_STAT_SYNPROXY "_entries"
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, NULL
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, RRD_TYPE_NET_STAT_SYNPROXY
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, NULL
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, "SYNPROXY Entries Used"
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, "entries"
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, PLUGIN_PROC_NAME
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, PLUGIN_PROC_MODULE_SYNPROXY_NAME
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, NETDATA_CHART_PRIO_SYNPROXY_ENTRIES
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, update_every
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, RRDSET_TYPE_LINE
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);
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rrddim_add(st, "entries", NULL, 1, 1, RRD_ALGORITHM_ABSOLUTE);
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}
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else rrdset_next(st);
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rrddim_set(st, "entries", entries);
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rrdset_done(st);
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}
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// --------------------------------------------------------------------
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if(do_syns == CONFIG_BOOLEAN_YES || (do_syns == CONFIG_BOOLEAN_AUTO &&
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(events || netdata_zero_metrics_enabled == CONFIG_BOOLEAN_YES))) {
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do_syns = CONFIG_BOOLEAN_YES;
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static RRDSET *st = NULL;
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if(unlikely(!st)) {
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st = rrdset_create_localhost(
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RRD_TYPE_NET_STAT_NETFILTER
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, RRD_TYPE_NET_STAT_SYNPROXY "_syn_received"
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, NULL
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, RRD_TYPE_NET_STAT_SYNPROXY
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, NULL
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, "SYNPROXY SYN Packets received"
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, "packets/s"
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, PLUGIN_PROC_NAME
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, PLUGIN_PROC_MODULE_SYNPROXY_NAME
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, NETDATA_CHART_PRIO_SYNPROXY_SYN_RECEIVED
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, update_every
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, RRDSET_TYPE_LINE
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);
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rrddim_add(st, "received", NULL, 1, 1, RRD_ALGORITHM_INCREMENTAL);
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}
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else rrdset_next(st);
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rrddim_set(st, "received", syn_received);
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rrdset_done(st);
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}
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// --------------------------------------------------------------------
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if(do_reopened == CONFIG_BOOLEAN_YES || (do_reopened == CONFIG_BOOLEAN_AUTO &&
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(events || netdata_zero_metrics_enabled == CONFIG_BOOLEAN_YES))) {
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do_reopened = CONFIG_BOOLEAN_YES;
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static RRDSET *st = NULL;
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if(unlikely(!st)) {
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st = rrdset_create_localhost(
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RRD_TYPE_NET_STAT_NETFILTER
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, RRD_TYPE_NET_STAT_SYNPROXY "_conn_reopened"
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, NULL
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, RRD_TYPE_NET_STAT_SYNPROXY
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, NULL
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, "SYNPROXY Connections Reopened"
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, "connections/s"
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, PLUGIN_PROC_NAME
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, PLUGIN_PROC_MODULE_SYNPROXY_NAME
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, NETDATA_CHART_PRIO_SYNPROXY_CONN_OPEN
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, update_every
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, RRDSET_TYPE_LINE
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);
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rrddim_add(st, "reopened", NULL, 1, 1, RRD_ALGORITHM_INCREMENTAL);
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}
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else rrdset_next(st);
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rrddim_set(st, "reopened", conn_reopened);
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rrdset_done(st);
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}
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// --------------------------------------------------------------------
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if(do_cookies == CONFIG_BOOLEAN_YES || (do_cookies == CONFIG_BOOLEAN_AUTO &&
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(events || netdata_zero_metrics_enabled == CONFIG_BOOLEAN_YES))) {
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do_cookies = CONFIG_BOOLEAN_YES;
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static RRDSET *st = NULL;
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if(unlikely(!st)) {
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st = rrdset_create_localhost(
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RRD_TYPE_NET_STAT_NETFILTER
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, RRD_TYPE_NET_STAT_SYNPROXY "_cookies"
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, NULL
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, RRD_TYPE_NET_STAT_SYNPROXY
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, NULL
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, "SYNPROXY TCP Cookies"
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, "cookies/s"
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, PLUGIN_PROC_NAME
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, PLUGIN_PROC_MODULE_SYNPROXY_NAME
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, NETDATA_CHART_PRIO_SYNPROXY_COOKIES
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, update_every
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, RRDSET_TYPE_LINE
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);
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rrddim_add(st, "valid", NULL, 1, 1, RRD_ALGORITHM_INCREMENTAL);
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rrddim_add(st, "invalid", NULL, -1, 1, RRD_ALGORITHM_INCREMENTAL);
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rrddim_add(st, "retransmits", NULL, 1, 1, RRD_ALGORITHM_INCREMENTAL);
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}
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else rrdset_next(st);
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rrddim_set(st, "valid", cookie_valid);
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rrddim_set(st, "invalid", cookie_invalid);
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rrddim_set(st, "retransmits", cookie_retrans);
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rrdset_done(st);
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}
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return 0;
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}
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