fty-device-scan

#!/bin/bash

# Copyright (C) 2016 - 2020 Eaton
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
#
#! \file    fty-device-scan
#  \brief   Helper script to scan an SNMP-capable power device and
#           report the scan results via e-mail
#  \author  Tomas Halman <TomasHalman@Eaton.com>
#  \author  Arnaud Quette <ArnaudQuette@Eaton.com>

MAIL="EatonProductFeedback@eaton.com"
IP=""
CFG="/etc/default/bios.cfg"
TMPFILE="/tmp/scan-`date -u '+%s'`-$$.gz"

getCommunities() {
    # This routine fetches the user-provided SNMP community strings from
    # the configuration file $CFG (if any) and appends the default "public"
    # to the list of strings to try against the separately scanned device.
    local FILE="${CFG}"
    if [[ ! -s "${FILE}" ]]; then
        FILE="/dev/null"
    fi
    awk '
    BEGIN{ section=""; subsection="" }
    {
        if (section == "snmp" && subsection == "community") {
            i = index ($0, "\"");
            if (i) {
                c = substr ($0,i);
                print substr (c, 2, length(c) - 2);
            }
        }
    }
    /^[a-zA-Z]/{ section = $1 }
    /^ {4}[a-zA-Z]/{ subsection = $1 }
    END{ print "public"; }
    ' < "${FILE}"
}


usage() {
    echo "usage: `basename ${0}` IPADDRESS [email]"
    echo "       default email is ${MAIL}"
    exit 1;
}

if [[ -z "${1-}" ]] ; then
    usage
else
    IP="${1}"
fi

if [[ -n "${2-}" ]] ; then
    MAIL="${2}"
fi

echo "Scan of the device at address ${IP} will be sent to ${MAIL}."
echo "Scan can contain sensitive information such as IP address or admin contacts."
echo ""
echo "Press <Enter> to continue or <Ctrl-C> to cancel"
read

getCommunities | while read community; do
    echo "Trying community \"${community}\"..."
    for version in "1" "2c" ; do
        if snmpgetnext -v "${version}" -c "${community}" "${IP}" .1 2> /dev/null ; then
            echo "Community ${community}/v${version} works, scanning mib..."
            snmpwalk -On -v "${version}" -c "${community}" "${IP}" .1 2>/dev/null | gzip > "${TMPFILE}"
            break 2
        fi
    done
done

if [[ ! -s "${TMPFILE}" ]] ; then
    echo "Failed to scan device. Is SNMP configured on ${IP}?" >&2
    exit 2
fi

echo "Scanning done, posting e-mail..."
echo "" | fty-sendmail -s "SNMP scan of ${IP}" -a "${TMPFILE}" "${MAIL}"
rm -f "${TMPFILE}"