diff options
Diffstat (limited to 'usr.sbin/bsnmpd/modules/snmp_hostres/hostres_snmp.c')
| -rw-r--r-- | usr.sbin/bsnmpd/modules/snmp_hostres/hostres_snmp.c | 208 |
1 files changed, 208 insertions, 0 deletions
diff --git a/usr.sbin/bsnmpd/modules/snmp_hostres/hostres_snmp.c b/usr.sbin/bsnmpd/modules/snmp_hostres/hostres_snmp.c new file mode 100644 index 000000000000..45b240394ac3 --- /dev/null +++ b/usr.sbin/bsnmpd/modules/snmp_hostres/hostres_snmp.c @@ -0,0 +1,208 @@ +/*- + * SPDX-License-Identifier: (BSD-2-Clause AND Beerware) + * + * Copyright (c) 2005-2006 The FreeBSD Project + * All rights reserved. + * + * Author: Victor Cruceru <soc-victor@freebsd.org> + * + * Redistribution of this software and documentation 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 or documentation 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 AUTHOR 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 AUTHOR 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. + * + * This C file contains code developed by Poul-Henning Kamp under the + * following license: + * + * FreeBSD: src/sbin/mdconfig/mdconfig.c,v 1.33.2.1 2004/09/14 03:32:21 jmg Exp + * ---------------------------------------------------------------------------- + * "THE BEER-WARE LICENSE" (Revision 42): + * <phk@FreeBSD.ORG> wrote this file. As long as you retain this notice you + * can do whatever you want with this stuff. If we meet some day, and you think + * this stuff is worth it, you can buy me a beer in return. Poul-Henning Kamp + * ---------------------------------------------------------------------------- + */ + +/* + * Host Resources MIB implementation for bsnmpd. + */ + +#include <paths.h> +#include <stdlib.h> +#include <string.h> +#include <syslog.h> +#include <unistd.h> + +#include "hostres_snmp.h" +#include "hostres_oid.h" +#include "hostres_tree.h" + +/* Internal id got after we'll register this module with the agent */ +static u_int host_registration_id = 0; + +/* This our hostres module */ +static struct lmodule *hostres_module; + +/* See the generated file hostres_oid.h */ +static const struct asn_oid oid_host = OIDX_host; + +/* descriptor to access kernel memory */ +kvm_t *hr_kd; + +/* + * HOST RESOURCES mib module finalization hook. + * Returns 0 on success, < 0 on error + */ +static int +hostres_fini(void) +{ + + if (hr_kd != NULL) + (void)kvm_close(hr_kd); + + fini_storage_tbl(); + fini_fs_tbl(); + fini_processor_tbl(); + fini_disk_storage_tbl(); + fini_device_tbl(); + fini_partition_tbl(); + fini_network_tbl(); + fini_printer_tbl(); + + fini_swrun_tbl(); + fini_swins_tbl(); + + fini_scalars(); + + if (host_registration_id > 0) + or_unregister(host_registration_id); + + HRDBG("done."); + return (0); +} + +/* + * HOST RESOURCES mib module initialization hook. + * Returns 0 on success, < 0 on error + */ +static int +hostres_init(struct lmodule *mod, int argc __unused, char *argv[] __unused) +{ + + hostres_module = mod; + + /* + * NOTE: order of these calls is important here! + */ + if ((hr_kd = kvm_open(NULL, _PATH_DEVNULL, NULL, O_RDONLY, + "kvm_open")) == NULL) { + syslog(LOG_ERR, "kvm_open failed: %m "); + return (-1); + } + + /* + * The order is relevant here, because some table depend on each other. + */ + init_device_tbl(); + + /* populates partition table too */ + if (init_disk_storage_tbl()) { + hostres_fini(); + return (-1); + } + init_processor_tbl(); + init_printer_tbl(); + + /* + * populate storage and FS tables. Must be done after device + * initialisation because the FS refresh code calls into the + * partition refresh code. + */ + init_storage_tbl(); + + + /* also the hrSWRunPerfTable's support is initialized here */ + init_swrun_tbl(); + init_swins_tbl(); + + HRDBG("done."); + + return (0); +} + +/* + * HOST RESOURCES mib module start operation + * returns nothing + */ +static void +hostres_start(void) +{ + + host_registration_id = or_register(&oid_host, + "The MIB module for Host Resource MIB (RFC 2790).", + hostres_module); + + start_device_tbl(hostres_module); + start_processor_tbl(hostres_module); + start_network_tbl(); + + HRDBG("done."); +} + +/* this identifies the HOST RESOURCES mib module */ +const struct snmp_module config = { + "This module implements the host resource mib (rfc 2790)", + hostres_init, + hostres_fini, + NULL, /* idle function, do not use it */ + NULL, + NULL, + hostres_start, + NULL, /* proxy a PDU */ + hostres_ctree, /* see the generated hostres_tree.h */ + hostres_CTREE_SIZE, /* see the generated hostres_tree.h */ + NULL +}; + +/** + * Make an SNMP DateAndTime from a struct tm. This should be in the library. + */ +int +make_date_time(u_char *str, const struct tm *tm, u_int decisecs) +{ + + str[0] = (u_char)((tm->tm_year + 1900) >> 8); + str[1] = (u_char)(tm->tm_year + 1900); + str[2] = tm->tm_mon + 1; + str[3] = tm->tm_mday; + str[4] = tm->tm_hour; + str[5] = tm->tm_min; + str[6] = tm->tm_sec; + str[7] = decisecs; + if (tm->tm_gmtoff < 0) + str[8] = '-'; + else + str[8] = '+'; + + str[9] = (u_char)(labs(tm->tm_gmtoff) / 3600); + str[10] = (u_char)((labs(tm->tm_gmtoff) % 3600) / 60); + + return (11); +} |