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239 lines
7.1 KiB
239 lines
7.1 KiB
From: Nick Hainke <vincent@systemli.org>
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Date: Mon, 7 Dec 2020 19:29:54 +0100
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Subject: [PATCH] snmp6: add ipv6 statistics
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ChangeLog: snmp6 plugin: Add plugin for parsing IPv6 statistics
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We would like to have pure ipv6 interface statistics. To get them,
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we parse the snmp6 interface.
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Signed-off-by: Nick Hainke <vincent@systemli.org>
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---
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Makefile.am | 8 +++
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README | 4 ++
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configure.ac | 2 +
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src/collectd.conf.in | 6 ++
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src/snmp6.c | 135 +++++++++++++++++++++++++++++++++++++++++++
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src/types.db | 2 +
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6 files changed, 157 insertions(+)
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create mode 100644 src/snmp6.c
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--- a/Makefile.am
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+++ b/Makefile.am
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@@ -1964,6 +1964,14 @@ TESTS += test_plugin_snmp_agent
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endif
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+if BUILD_PLUGIN_SNMP6
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+pkglib_LTLIBRARIES += snmp6.la
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+snmp6_la_SOURCES = src/snmp6.c
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+snmp6_la_CFLAGS = $(AM_CFLAGS)
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+snmp6_la_LDFLAGS = $(PLUGIN_LDFLAGS)
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+snmp6_la_LIBADD = libignorelist.la
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+endif # BUILD_PLUGIN_SNMP6
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+
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if BUILD_PLUGIN_STATSD
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pkglib_LTLIBRARIES += statsd.la
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statsd_la_SOURCES = src/statsd.c
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--- a/README
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+++ b/README
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@@ -422,6 +422,10 @@ Features
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network devices such as switches, routers, thermometers, rack monitoring
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servers, etc. See collectd-snmp(5).
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+ - snmp6
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+ Read values from SNMP6 (Simple Network Management Protocol). Supports pure
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+ IPv6 interface statistics.
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+
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- statsd
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Acts as a StatsD server, reading values sent over the network from StatsD
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clients and calculating rates and other aggregates out of these values.
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--- a/configure.ac
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+++ b/configure.ac
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@@ -7162,6 +7162,7 @@ AC_PLUGIN([slurm], [$with_
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AC_PLUGIN([smart], [$plugin_smart], [SMART statistics])
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AC_PLUGIN([snmp], [$with_libnetsnmp], [SNMP querying plugin])
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AC_PLUGIN([snmp_agent], [$with_libnetsnmpagent], [SNMP agent plugin])
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+AC_PLUGIN([snmp6], [yes], [IPv6 Interface traffic statistics via snmp6])
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AC_PLUGIN([statsd], [yes], [StatsD plugin])
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AC_PLUGIN([swap], [$plugin_swap], [Swap usage statistics])
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AC_PLUGIN([synproxy], [$plugin_synproxy], [Synproxy stats plugin])
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@@ -7611,6 +7612,7 @@ AC_MSG_RESULT([ slurm . . . . . . . .
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AC_MSG_RESULT([ smart . . . . . . . . $enable_smart])
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AC_MSG_RESULT([ snmp . . . . . . . . $enable_snmp])
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AC_MSG_RESULT([ snmp_agent . . . . . $enable_snmp_agent])
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+AC_MSG_RESULT([ snmp6 . . . . . . . . $enable_snmp6])
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AC_MSG_RESULT([ statsd . . . . . . . $enable_statsd])
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AC_MSG_RESULT([ swap . . . . . . . . $enable_swap])
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AC_MSG_RESULT([ synproxy . . . . . . $enable_synproxy])
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--- a/src/collectd.conf.in
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+++ b/src/collectd.conf.in
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@@ -207,6 +207,7 @@
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#@BUILD_PLUGIN_SMART_TRUE@LoadPlugin smart
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#@BUILD_PLUGIN_SNMP_TRUE@LoadPlugin snmp
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#@BUILD_PLUGIN_SNMP_AGENT_TRUE@LoadPlugin snmp_agent
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+#@BUILD_PLUGIN_SNMP6_TRUE@LoadPlugin snmp6
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#@BUILD_PLUGIN_STATSD_TRUE@LoadPlugin statsd
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#@BUILD_PLUGIN_SWAP_TRUE@LoadPlugin swap
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#@BUILD_PLUGIN_SYSEVENT_TRUE@LoadPlugin sysevent
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@@ -1718,6 +1719,11 @@
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# </Table>
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#</Plugin>
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+#<Plugin snmp6>
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+# Interface "eth0"
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+# IgnoreSelected false
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+#</Plugin>
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+
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#<Plugin statsd>
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# Host "::"
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# Port "8125"
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--- /dev/null
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+++ b/src/snmp6.c
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@@ -0,0 +1,135 @@
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+/*
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+ This Plugin is based opn the interface.c Plugin.
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+*/
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+#include <stdint.h>
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+#include <stdlib.h>
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+#include <string.h>
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+#include <errno.h>
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+#include <stdbool.h>
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+#include <stdio.h>
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+
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+#include <net/if.h>
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+#include <sys/types.h>
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+#include <ifaddrs.h>
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+
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+#include "plugin.h"
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+#include "utils/cmds/putval.h"
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+#include "utils/common/common.h"
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+#include "utils/ignorelist/ignorelist.h"
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+
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+static const char *config_keys[] = {
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+ "Interface",
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+ "IgnoreSelected",
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+};
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+static int config_keys_num = STATIC_ARRAY_SIZE(config_keys);
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+
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+static ignorelist_t *ignorelist;
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+
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+static int snmp6_config(const char *key, const char *value) {
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+ if (ignorelist == NULL)
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+ ignorelist = ignorelist_create(/* invert = */ 1);
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+
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+ if (strcasecmp(key, "Interface") == 0) {
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+ ignorelist_add(ignorelist, value);
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+ } else if (strcasecmp(key, "IgnoreSelected") == 0) {
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+ int invert = 1;
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+ if (IS_TRUE(value))
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+ invert = 0;
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+ ignorelist_set_invert(ignorelist, invert);
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+ }
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+
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+ return 0;
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+}
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+
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+/* Copied from interface.c */
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+static void snmp6_submit(const char *dev, const char *type, derive_t rx,
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+ derive_t tx) {
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+ value_list_t vl = VALUE_LIST_INIT;
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+ value_t values[] = {
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+ {.derive = rx},
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+ {.derive = tx},
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+ };
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+
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+ vl.values = values;
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+ vl.values_len = STATIC_ARRAY_SIZE(values);
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+ sstrncpy(vl.plugin, "snmp6", sizeof(vl.plugin));
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+ sstrncpy(vl.plugin_instance, dev, sizeof(vl.plugin_instance));
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+ sstrncpy(vl.type, type, sizeof(vl.type));
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+
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+ plugin_dispatch_values(&vl);
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+} /* void if_submit */
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+
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+int snmp_read(char *ifname) {
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+ FILE *fh;
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+ char buffer[1024];
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+ char *fields[2];
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+ int numfields;
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+ int currline = 0;
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+ derive_t data[76];
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+ char procpath[1024];
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+ int offset = 0;
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+
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+ if (ignorelist_match(ignorelist, ifname) != 0)
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+ return 0;
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+
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+ if (strncmp("all", ifname, strlen("all")) == 0) {
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+ snprintf(procpath, 1024, "/proc/net/snmp6");
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+ offset = 1;
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+ } else {
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+ snprintf(procpath, 1024, "/proc/net/dev_snmp6/%s", ifname);
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+ }
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+
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+ if ((fh = fopen(procpath, "r")) == NULL) {
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+ WARNING("snmp6 plugin: try opening %s : fopen: %s", procpath, STRERRNO);
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+ return -1;
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+ }
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+
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+ while (fgets(buffer, 1024, fh) != NULL) {
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+ numfields = strsplit(buffer, fields, 2);
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+
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+ if (numfields < 2)
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+ return -1;
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+
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+ data[currline++] = atoll(fields[1]);
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+ }
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+
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+ fclose(fh);
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+
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+ if (currline < 28) {
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+ return -1;
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+ }
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+
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+ snmp6_submit(ifname, "if_octets", data[23 - offset], data[24 - offset]);
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+ snmp6_submit(ifname, "if_octets_mcast", data[25 - offset], data[26 - offset]);
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+ snmp6_submit(ifname, "if_octets_bcast", data[27 - offset], data[28 - offset]);
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+ return 0;
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+}
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+
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+int read_all_interfaces(void) {
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+#ifndef HAVE_IFADDRS_H
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+ return -1;
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+#else
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+
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+ // getifaddrs is not working all the time (e.g. wireguard interfaces)
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+ // instead we use if_nameindex() syscall as suggested in:
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+ // https://stackoverflow.com/a/45796495/8474618
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+ struct if_nameindex *if_nidxs, *intf;
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+
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+ if_nidxs = if_nameindex();
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+
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+ if (if_nidxs != NULL) {
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+ for (intf = if_nidxs; intf->if_index != 0 || intf->if_name != NULL; intf++) {
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+ snmp_read(intf->if_name);
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+ }
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+ if_freenameindex(if_nidxs);
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+ }
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+
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+ snmp_read("all");
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+ return 0;
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+#endif
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+}
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+
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+void module_register(void) {
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+ plugin_register_config("snmp6", snmp6_config, config_keys, config_keys_num);
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+ plugin_register_read("snmp6", read_all_interfaces);
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+} /* void module_register */
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--- a/src/types.db
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+++ b/src/types.db
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@@ -132,6 +132,8 @@ if_dropped rx:DERIVE:0:U, t
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if_errors rx:DERIVE:0:U, tx:DERIVE:0:U
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if_multicast value:DERIVE:0:U
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if_octets rx:DERIVE:0:U, tx:DERIVE:0:U
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+if_octets_mcast rx:DERIVE:0:U, tx:DERIVE:0:U
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+if_octets_bcast rx:DERIVE:0:U, tx:DERIVE:0:U
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if_packets rx:DERIVE:0:U, tx:DERIVE:0:U
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if_rx_dropped value:DERIVE:0:U
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if_rx_errors value:DERIVE:0:U
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