svn commit: r266936 - in head: etc usr.sbin/bsnmpd/modules usr.sbin/bsnmpd/modules/snmp_lm75
Luiz Otavio O Souza
loos at FreeBSD.org
Sun Jun 1 03:14:05 UTC 2014
Author: loos
Date: Sun Jun 1 03:14:03 2014
New Revision: 266936
URL: http://svnweb.freebsd.org/changeset/base/266936
Log:
Adds the bsnmp module to export the temperature data from lm75 sensors on
the system.
Together with lm75(4) this module allows easy temperature monitoring over
SNMP, specially for embedded systems.
Manual page reviewed by: brueffer (D128)
Added:
head/usr.sbin/bsnmpd/modules/snmp_lm75/
head/usr.sbin/bsnmpd/modules/snmp_lm75/BEGEMOT-LM75-MIB.txt (contents, props changed)
head/usr.sbin/bsnmpd/modules/snmp_lm75/Makefile (contents, props changed)
head/usr.sbin/bsnmpd/modules/snmp_lm75/lm75_tree.def (contents, props changed)
head/usr.sbin/bsnmpd/modules/snmp_lm75/snmp_lm75.3 (contents, props changed)
head/usr.sbin/bsnmpd/modules/snmp_lm75/snmp_lm75.c (contents, props changed)
Modified:
head/etc/snmpd.config
head/usr.sbin/bsnmpd/modules/Makefile
Modified: head/etc/snmpd.config
==============================================================================
--- head/etc/snmpd.config Sun Jun 1 02:47:09 2014 (r266935)
+++ head/etc/snmpd.config Sun Jun 1 03:14:03 2014 (r266936)
@@ -279,6 +279,11 @@ begemotSnmpdModulePath."mibII" = "/usr/l
#begemotNgControlNodeName = "snmpd"
#
+# LM75 Sensor module
+#
+#begemotSnmpdModulePath."lm75" = "/usr/lib/snmp_lm75.so"
+
+#
# pf(4) module
#
#begemotSnmpdModulePath."pf" = "/usr/lib/snmp_pf.so"
Modified: head/usr.sbin/bsnmpd/modules/Makefile
==============================================================================
--- head/usr.sbin/bsnmpd/modules/Makefile Sun Jun 1 02:47:09 2014 (r266935)
+++ head/usr.sbin/bsnmpd/modules/Makefile Sun Jun 1 03:14:03 2014 (r266936)
@@ -12,6 +12,7 @@ SUBDIR= ${_snmp_atm} \
snmp_bridge \
snmp_hast \
snmp_hostres \
+ snmp_lm75 \
snmp_mibII \
snmp_target \
snmp_usm \
Added: head/usr.sbin/bsnmpd/modules/snmp_lm75/BEGEMOT-LM75-MIB.txt
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ head/usr.sbin/bsnmpd/modules/snmp_lm75/BEGEMOT-LM75-MIB.txt Sun Jun 1 03:14:03 2014 (r266936)
@@ -0,0 +1,160 @@
+--
+-- Copyright (c) 2014 Luiz Otavio O Souza <loos at FreeBSD.org>
+-- All rights reserved.
+--
+-- Redistribution and use in source and binary forms, with or without
+-- modification, are permitted provided that the following conditions
+-- are met:
+-- 1. Redistributions of source code must retain the above copyright
+-- notice, this list of conditions and the following disclaimer.
+-- 2. Redistributions in binary form must reproduce the above copyright
+-- notice, this list of conditions and the following disclaimer in the
+-- documentation and/or other materials provided with the distribution.
+--
+-- THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+-- ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+-- IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+-- ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+-- FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+-- DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+-- OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+-- HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+-- LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+-- OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+-- SUCH DAMAGE.
+--
+-- $FreeBSD$
+--
+
+BEGEMOT-LM75-MIB DEFINITIONS ::= BEGIN
+
+IMPORTS
+ MODULE-IDENTITY, OBJECT-TYPE, NOTIFICATION-TYPE,
+ Counter64, Integer32
+ FROM SNMPv2-SMI
+ TEXTUAL-CONVENTION, RowStatus
+ FROM SNMPv2-TC
+ begemot
+ FROM BEGEMOT-MIB;
+
+begemotLoos MODULE-IDENTITY
+ LAST-UPDATED "201402240000Z"
+ ORGANIZATION "FreeBSD"
+ CONTACT-INFO
+ " Luiz Otavio O Souza
+
+ Postal: N/A
+
+ Fax: N/A
+
+ E-Mail: loos at FreeBSD.org"
+ DESCRIPTION
+ "The Begemot MIB for reading lm75 sensors data."
+ REVISION "201402240000Z"
+ DESCRIPTION
+ "Initial revision."
+ ::= { begemot 400 }
+
+begemotLm75Objects OBJECT IDENTIFIER ::= { begemotLm75 1 }
+
+-- ---------------------------------------------------------- --
+-- Configuration parameters
+-- ---------------------------------------------------------- --
+
+lm75Sensor OBJECT IDENTIFIER ::= { begemotlm75Objects 1 }
+
+lm75Sensors OBJECT-TYPE
+ SYNTAX Integer32
+ MAX-ACCESS read-only
+ STATUS current
+ DESCRIPTION
+ "Number of LM75 sensors in the system."
+ ::= { lm75Sensors 1 }
+
+-- ---------------------------------------------------------- --
+-- TempSensor Table
+-- ---------------------------------------------------------- --
+lm75SensorTable OBJECT-TYPE
+ SYNTAX SEQUENCE OF Lm75SensorEntry
+ MAX-ACCESS not-accessible
+ STATUS current
+ DESCRIPTION
+ "A table containing information about all temperature sensors."
+ ::= { begemotLm75Objects 2 }
+
+loosTempSensorEntry OBJECT-TYPE
+ SYNTAX Lm75SensorEntry
+ MAX-ACCESS not-accessible
+ STATUS current
+ DESCRIPTION
+ "Table entry that describes one temperature sensor."
+ INDEX { lm75SensorIndex }
+ ::= { lm75SensorTable 1 }
+
+Lm75SensorEntry ::= SEQUENCE {
+ lm75SensorIndex Integer32,
+ lm75SensorSysctlIndex Integer32,
+ lm75SensorDesc OCTET STRING,
+ lm75SensorLocation OCTET STRING,
+ lm75SensorPnpInfo OCTET STRING,
+ lm75SensorParent OCTET STRING,
+ lm75SensorTemperature Integer32
+}
+
+lm75SensorIndex OBJECT-TYPE
+ SYNTAX Integer32
+ MAX-ACCESS read-only
+ STATUS current
+ DESCRIPTION
+ "LM75 Sensor index."
+ ::= { lm75SensorEntry 1 }
+
+lm75SensorSysctlIndex OBJECT-TYPE
+ SYNTAX Integer32
+ MAX-ACCESS read-only
+ STATUS current
+ DESCRIPTION
+ "LM75 Sensor sysctl index."
+ ::= { lm75SensorEntry 2 }
+
+lm75SensorDesc OBJECT-TYPE
+ SYNTAX OCTET STRING
+ MAX-ACCESS read-only
+ STATUS current
+ DESCRIPTION
+ "LM75 Sensor description."
+ ::= { lm75SensorEntry 3 }
+
+lm75SensorLocation OBJECT-TYPE
+ SYNTAX OCTET STRING
+ MAX-ACCESS read-only
+ STATUS current
+ DESCRIPTION
+ "LM75 Sensor location."
+ ::= { lm75SensorEntry 4 }
+
+lm75SensorPnpInfo OBJECT-TYPE
+ SYNTAX OCTET STRING
+ MAX-ACCESS read-only
+ STATUS current
+ DESCRIPTION
+ "LM75 Sensor pnp information."
+ ::= { lm75SensorEntry 5 }
+
+lm75SensorParent OBJECT-TYPE
+ SYNTAX OCTET STRING
+ MAX-ACCESS read-only
+ STATUS current
+ DESCRIPTION
+ "LM75 Sensor parent bus."
+ ::= { lm75SensorEntry 6 }
+
+lm75SensorTemperature OBJECT-TYPE
+ SYNTAX Integer32
+ MAX-ACCESS read-only
+ STATUS current
+ DESCRIPTION
+ "LM75 Sensor temperature."
+ ::= { lm75SensorEntry 7 }
+
+END
Added: head/usr.sbin/bsnmpd/modules/snmp_lm75/Makefile
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ head/usr.sbin/bsnmpd/modules/snmp_lm75/Makefile Sun Jun 1 03:14:03 2014 (r266936)
@@ -0,0 +1,13 @@
+# $FreeBSD$
+
+.include <bsd.own.mk>
+
+MOD= lm75
+SRCS= snmp_lm75.c
+XSYM= begemotLm75
+MAN= snmp_lm75.3
+
+BMIBS= BEGEMOT-LM75-MIB.txt
+DEFS= ${MOD}_tree.def
+
+.include <bsd.snmpmod.mk>
Added: head/usr.sbin/bsnmpd/modules/snmp_lm75/lm75_tree.def
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ head/usr.sbin/bsnmpd/modules/snmp_lm75/lm75_tree.def Sun Jun 1 03:14:03 2014 (r266936)
@@ -0,0 +1,56 @@
+#-
+# Copyright (c) 2014 Luiz Otavio O Souza <loos at FreeBSD.org>
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+# 1. Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+# 2. Redistributions in binary form must reproduce the above copyright
+# notice, this list of conditions and the following disclaimer in the
+# documentation and/or other materials provided with the distribution.
+#
+# THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+# ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+# SUCH DAMAGE.
+#
+# $FreeBSD$
+#
+
+(1 internet
+ (4 private
+ (1 enterprises
+ (12325 fokus
+ (1 begemot
+ (400 begemotLm75
+ (1 begemotLm75Objects
+ (1 lm75Sensors
+ (1 lm75Sensors INTEGER32 op_lm75Sensors GET)
+ )
+ (2 lm75SensorTable
+ (1 lm75SensorEntry : OCTETSTRING op_lm75SensorTable
+ (1 lm75SensorIndex INTEGER32 GET)
+ (2 lm75SensorSysctlIndex INTEGER32 GET)
+ (3 lm75SensorDesc OCTETSTRING GET)
+ (4 lm75SensorLocation OCTETSTRING GET)
+ (5 lm75SensorPnpInfo OCTETSTRING GET)
+ (6 lm75SensorParent OCTETSTRING GET)
+ (7 lm75SensorTemperature INTEGER32 GET)
+ )
+ )
+ )
+ )
+ )
+ )
+ )
+ )
+)
Added: head/usr.sbin/bsnmpd/modules/snmp_lm75/snmp_lm75.3
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ head/usr.sbin/bsnmpd/modules/snmp_lm75/snmp_lm75.3 Sun Jun 1 03:14:03 2014 (r266936)
@@ -0,0 +1,60 @@
+.\"-
+.\" Copyright (c) 2014 Luiz Otavio O Souza <loos at FreeBSD.org>
+.\" All rights reserved.
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\" notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\" notice, this list of conditions and the following disclaimer in the
+.\" documentation and/or other materials provided with the distribution.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+.\" SUCH DAMAGE.
+.\"
+.\" $FreeBSD$
+.\"
+.Dd Jun 1, 2014
+.Dt SNMP_LM75 3
+.Os
+.Sh NAME
+.Nm snmp_lm75
+.Nd "LM75 Sensor module for"
+.Xr bsnmpd 1
+.Sh LIBRARY
+.Pq begemotSnmpdModulePath."lm75" = "/usr/lib/snmp_lm75.so"
+.Sh DESCRIPTION
+The
+.Nm snmp_lm75
+module implements a private BEGEMOT-LM75-MIB, which allows
+reading the temperature of the LM75 sensors on the system.
+.Pp
+The module reads the sensor(s) temperature using the
+.Xr sysctl 8
+API.
+.Sh FILES
+.Bl -tag -width "XXXXXXXXX"
+.It Pa /usr/share/snmp/defs/lm75_tree.def
+The description of the MIB tree implemented by
+.Nm .
+.It Pa /usr/share/snmp/mibs/BEGEMOT-LM75-MIB.txt
+The private BEGEMOT-LM75-MIB that is implemented by this module.
+.El
+.Sh SEE ALSO
+.Xr bsnmpd 1 ,
+.Xr gensnmptree 1 ,
+.Xr snmpmod 3 ,
+.Xr lm75 4
+.Sh AUTHORS
+.An Luiz Otavio O Souza Aq loos at FreeBSD.org .
Added: head/usr.sbin/bsnmpd/modules/snmp_lm75/snmp_lm75.c
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ head/usr.sbin/bsnmpd/modules/snmp_lm75/snmp_lm75.c Sun Jun 1 03:14:03 2014 (r266936)
@@ -0,0 +1,436 @@
+/*-
+ * Copyright (c) 2014 Luiz Otavio O Souza <loos at FreeBSD.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/param.h>
+#include <sys/queue.h>
+#include <sys/sysctl.h>
+
+#include <bsnmp/snmpmod.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <syslog.h>
+
+#include "lm75_oid.h"
+#include "lm75_tree.h"
+
+#ifndef LM75BUF
+#define LM75BUF 64
+#endif
+#define TZ_ZEROC 2732
+#define UPDATE_INTERVAL 500 /* update interval in ticks */
+
+static struct lmodule *module;
+
+static const struct asn_oid oid_lm75 = OIDX_begemotLm75;
+
+/* the Object Resource registration index */
+static u_int lm75_index = 0;
+
+/* Number of available sensors in the system. */
+static int lm75_sensors;
+
+/*
+ * Structure that describes single sensor.
+ */
+struct lm75_snmp_sensor {
+ TAILQ_ENTRY(lm75_snmp_sensor) link;
+ int32_t index;
+ int32_t sysctlidx;
+ int32_t temp;
+ char desc[LM75BUF];
+ char location[LM75BUF];
+ char parent[LM75BUF];
+ char pnpinfo[LM75BUF];
+};
+
+static TAILQ_HEAD(, lm75_snmp_sensor) sensors =
+ TAILQ_HEAD_INITIALIZER(sensors);
+
+/* Ticks of the last sensors reading. */
+static uint64_t last_sensors_update;
+
+static void free_sensors(void);
+static int lm75_fini(void);
+static int lm75_init(struct lmodule *mod, int argc, char *argv[]);
+static void lm75_start(void);
+static int update_sensors(void);
+
+const struct snmp_module config = {
+ .comment =
+ "This module implements the BEGEMOT MIB for reading LM75 sensors data.",
+ .init = lm75_init,
+ .start = lm75_start,
+ .fini = lm75_fini,
+ .tree = lm75_ctree,
+ .tree_size = lm75_CTREE_SIZE,
+};
+
+static int
+lm75_init(struct lmodule *mod, int argc __unused, char *argv[] __unused)
+{
+
+ module = mod;
+
+ lm75_sensors = 0;
+ openlog("snmp_lm75", LOG_NDELAY | LOG_PID, LOG_DAEMON);
+
+ return(0);
+}
+
+static void
+lm75_start(void)
+{
+
+ lm75_index = or_register(&oid_lm75,
+ "The MIB module for reading lm75 sensors data.", module);
+}
+
+static int
+lm75_fini(void)
+{
+
+ or_unregister(lm75_index);
+ free_sensors();
+ closelog();
+
+ return (0);
+}
+
+static void
+free_sensors(void)
+{
+ struct lm75_snmp_sensor *sensor;
+
+ while ((sensor = TAILQ_FIRST(&sensors)) != NULL) {
+ TAILQ_REMOVE(&sensors, sensor, link);
+ free(sensor);
+ }
+}
+
+static int
+sysctlname(int *oid, int nlen, char *name, size_t len)
+{
+ int mib[12];
+
+ if (nlen > (int)sizeof(mib) + 2)
+ return (-1);
+
+ mib[0] = 0;
+ mib[1] = 1;
+ memcpy(mib + 2, oid, nlen * sizeof(int));
+
+ if (sysctl(mib, nlen + 2, name, &len, 0, 0) == -1)
+ return (-1);
+
+ return (0);
+}
+
+static int
+sysctlgetnext(int *oid, int nlen, int *next, size_t *nextlen)
+{
+ int mib[12];
+
+ if (nlen > (int)sizeof(mib) + 2)
+ return (-1);
+
+ mib[0] = 0;
+ mib[1] = 2;
+ memcpy(mib + 2, oid, nlen * sizeof(int));
+
+ if (sysctl(mib, nlen + 2, next, nextlen, 0, 0) == -1)
+ return (-1);
+
+ return (0);
+}
+
+static int
+update_sensor_sysctl(char *obuf, size_t *obuflen, int idx, const char *name)
+{
+ char buf[LM75BUF];
+ int mib[5];
+ size_t len;
+
+ /* Fill out the mib information. */
+ snprintf(buf, sizeof(buf) - 1, "dev.lm75.%d.%s", idx, name);
+ len = 4;
+ if (sysctlnametomib(buf, mib, &len) == -1)
+ return (-1);
+
+ /* Read the sysctl data. */
+ if (sysctl(mib, len, obuf, obuflen, NULL, 0) == -1)
+ return (-1);
+
+ return (0);
+}
+
+static void
+update_sensor(struct lm75_snmp_sensor *sensor, int idx)
+{
+ size_t len;
+
+ len = sizeof(sensor->desc);
+ update_sensor_sysctl(sensor->desc, &len, idx, "%desc");
+
+ len = sizeof(sensor->location);
+ update_sensor_sysctl(sensor->location, &len, idx, "%location");
+
+ len = sizeof(sensor->pnpinfo);
+ update_sensor_sysctl(sensor->pnpinfo, &len, idx, "%pnpinfo");
+
+ len = sizeof(sensor->parent);
+ update_sensor_sysctl(sensor->parent, &len, idx, "%parent");
+}
+
+static int
+add_sensor(char *buf, size_t nlen)
+{
+ int idx, mib[5], temp;
+ size_t len;
+ struct lm75_snmp_sensor *sensor;
+
+ if (sscanf(buf, "dev.lm75.%d.temperature", &idx) != 1)
+ return (-1);
+
+ /* Fill out the mib information. */
+ if (sysctlnametomib(buf, mib, &nlen) == -1)
+ return (-1);
+
+ /* Read the sensor temperature. */
+ len = sizeof(temp);
+ if (sysctl(mib, nlen, &temp, &len, NULL, 0) == -1)
+ return (-1);
+
+ /* Add the sensor data to the table. */
+ sensor = calloc(1, sizeof(*sensor));
+ if (sensor == NULL) {
+ syslog(LOG_ERR, "Unable to allocate %zu bytes for resource",
+ sizeof(*sensor));
+ return (-1);
+ }
+ sensor->index = ++lm75_sensors;
+ sensor->sysctlidx = idx;
+ sensor->temp = (temp - TZ_ZEROC) / 10;
+ TAILQ_INSERT_TAIL(&sensors, sensor, link);
+
+ update_sensor(sensor, idx);
+
+ return (0);
+}
+
+static int
+update_sensors(void)
+{
+ char buf[LM75BUF];
+ int i, root[5], *next, *oid;
+ size_t len, nextlen, rootlen;
+ static uint64_t now;
+
+ now = get_ticks();
+ if (now - last_sensors_update < UPDATE_INTERVAL)
+ return (0);
+
+ last_sensors_update = now;
+
+ /* Reset the sensor data. */
+ free_sensors();
+ lm75_sensors = 0;
+
+ /* Start from the lm75 default root node. */
+ rootlen = 2;
+ if (sysctlnametomib("dev.lm75", root, &rootlen) == -1)
+ return (0);
+
+ oid = (int *)malloc(sizeof(int) * rootlen);
+ if (oid == NULL) {
+ perror("malloc");
+ return (-1);
+ }
+ memcpy(oid, root, rootlen * sizeof(int));
+ len = rootlen;
+
+ /* Traverse the sysctl(3) interface and find the active sensors. */
+ for (;;) {
+
+ /* Find the size of the next mib. */
+ nextlen = 0;
+ if (sysctlgetnext(oid, len, NULL, &nextlen) == -1) {
+ free(oid);
+ return (0);
+ }
+ /* Alocate and read the next mib. */
+ next = (int *)malloc(nextlen);
+ if (next == NULL) {
+ syslog(LOG_ERR,
+ "Unable to allocate %zu bytes for resource",
+ nextlen);
+ free(oid);
+ return (-1);
+ }
+ if (sysctlgetnext(oid, len, next, &nextlen) == -1) {
+ free(oid);
+ free(next);
+ return (0);
+ }
+ free(oid);
+ /* Check if we care about the next mib. */
+ for (i = 0; i < (int)rootlen; i++)
+ if (next[i] != root[i]) {
+ free(next);
+ return (0);
+ }
+ oid = (int *)malloc(nextlen);
+ if (oid == NULL) {
+ syslog(LOG_ERR,
+ "Unable to allocate %zu bytes for resource",
+ nextlen);
+ free(next);
+ return (-1);
+ }
+ memcpy(oid, next, nextlen);
+ free(next);
+ len = nextlen / sizeof(int);
+
+ /* Find the mib name. */
+ if (sysctlname(oid, len, buf, sizeof(buf)) != 0)
+ continue;
+
+ if (strstr(buf, "temperature"))
+ if (add_sensor(buf, len) != 0) {
+ free(oid);
+ return (-1);
+ }
+ }
+
+ return (0);
+}
+
+int
+op_lm75Sensors(struct snmp_context *context __unused, struct snmp_value *value,
+ u_int sub, u_int iidx __unused, enum snmp_op op)
+{
+ asn_subid_t which;
+
+ if (update_sensors() == -1)
+ return (SNMP_ERR_RES_UNAVAIL);
+
+ which = value->var.subs[sub - 1];
+
+ switch (op) {
+ case SNMP_OP_GET:
+ switch (which) {
+ case LEAF_lm75Sensors:
+ value->v.integer = lm75_sensors;
+ break;
+ default:
+ return (SNMP_ERR_RES_UNAVAIL);
+ }
+ break;
+ case SNMP_OP_SET:
+ return (SNMP_ERR_NOT_WRITEABLE);
+ case SNMP_OP_GETNEXT:
+ case SNMP_OP_ROLLBACK:
+ case SNMP_OP_COMMIT:
+ return (SNMP_ERR_NOERROR);
+ default:
+ return (SNMP_ERR_RES_UNAVAIL);
+ }
+
+ return (SNMP_ERR_NOERROR);
+}
+
+int
+op_lm75SensorTable(struct snmp_context *context __unused,
+ struct snmp_value *value, u_int sub, u_int iidx __unused, enum snmp_op op)
+{
+ struct lm75_snmp_sensor *sensor;
+ asn_subid_t which;
+ int ret;
+
+ if (update_sensors() == -1)
+ return (SNMP_ERR_RES_UNAVAIL);
+
+ which = value->var.subs[sub - 1];
+
+ switch (op) {
+ case SNMP_OP_GETNEXT:
+ sensor = NEXT_OBJECT_INT(&sensors, &value->var, sub);
+ if (sensor == NULL)
+ return (SNMP_ERR_NOSUCHNAME);
+ value->var.len = sub + 1;
+ value->var.subs[sub] = sensor->index;
+ break;
+ case SNMP_OP_GET:
+ if (value->var.len - sub != 1)
+ return (SNMP_ERR_NOSUCHNAME);
+ sensor = FIND_OBJECT_INT(&sensors, &value->var, sub);
+ if (sensor == NULL)
+ return (SNMP_ERR_NOSUCHNAME);
+ break;
+ case SNMP_OP_SET:
+ return (SNMP_ERR_NOT_WRITEABLE);
+ case SNMP_OP_ROLLBACK:
+ case SNMP_OP_COMMIT:
+ return (SNMP_ERR_NOERROR);
+ default:
+ return (SNMP_ERR_RES_UNAVAIL);
+ }
+
+ ret = SNMP_ERR_NOERROR;
+
+ switch (which) {
+ case LEAF_lm75SensorIndex:
+ value->v.integer = sensor->index;
+ break;
+ case LEAF_lm75SensorSysctlIndex:
+ value->v.integer = sensor->sysctlidx;
+ break;
+ case LEAF_lm75SensorDesc:
+ ret = string_get(value, sensor->desc, -1);
+ break;
+ case LEAF_lm75SensorLocation:
+ ret = string_get(value, sensor->location, -1);
+ break;
+ case LEAF_lm75SensorPnpInfo:
+ ret = string_get(value, sensor->pnpinfo, -1);
+ break;
+ case LEAF_lm75SensorParent:
+ ret = string_get(value, sensor->parent, -1);
+ break;
+ case LEAF_lm75SensorTemperature:
+ value->v.integer = sensor->temp;
+ break;
+ default:
+ ret = SNMP_ERR_RES_UNAVAIL;
+ break;
+ }
+
+ return (ret);
+}
More information about the svn-src-all
mailing list