netinfo

#!/bin/bash
#########################################################################
#	NetInfo - Display network configuration information		#
#	Copyright (C) 2015 Paul A. Hinchberger III			#
#########################################################################
#	This program is free software: you can redistribute it and/	#
#	or modify it under the terms of the GNU GPLv3 as published	#
#	by the Free Software Foundation.				#
#									#
#	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 GPLv3 for more details.			#
#									#
#	See <http://www.gnu.org/licenses/> for details.			#
#########################################################################

OSBFCT=false

while getopts "o" OPT; do
  case "${OPT}" in
    o) OBSFCT=true
  esac
done

shift $((OPTIND-1))

NIFACE=( $(\ls -1 /sys/class/net | grep -v lo | sort -V | tr '\n' ' ') )

! type ethtool &> /dev/null && ! type mii-tool &> /dev/null && \
  echo "Could not find ethtool nor mii-tool.  Link speeds will be unavailable."

printf '=%.0s' {1..79}; echo ''

NAMING="Using "
[ -e /etc/udev/rules.d/80-net-setup-link.rules ] && NAMING+="Kernel" || NAMING+="Predictable"
NAMING+=" Network Interface Names.  "

LOOKUP="$(dig +short ${HOSTNAME})"
[ ${OBSFCT} ] && [ -n "${LOOKUP}" ] && LOOKUP="${LOOKUP%.*.*}.X.X"

if [ -n "${LOOKUP}" ]; then
  LURSLT="DNS for ${HOSTNAME} is ${LOOKUP}"
else
  LURSLT="Could not look up ${HOSTNAME}."
fi

printf "%-44s %34s\n" "${NAMING}" "${LURSLT}"

printf '=%.0s' {1..79}; echo ''
echo -e '---MAC ADDRESS--- CUR-DEV UDR-DEV LSPD ASSIGNED-IP DHCP-LOOKUP NETCTL  NETWRKD'
printf '=%.0s' {1..79}; echo ''

for ((i = 0 ; i < ${#NIFACE[*]} ; i++)); do

  MACADD="$(cat /sys/class/net/${NIFACE[i]}/address)"
  [ ${OBSFCT} ] && FMTMAC="${MACADD%:??:??:??}:XX:XX:XX" || FMTMAC="${MACADD}"
  printf "%17s " "${FMTMAC}"

  printf "%-7s " "${NIFACE[i]}"

  UDRDEV="$(grep -i ATTR{address}==\"${MACADD}\" /etc/udev/rules.d/* 2> /dev/null | sed 's/\(.*NAME="\)\(.*\)\(".*\)/\2/g' )"

  printf "%-7s " "${UDRDEV}"

  if type ethtool &> /dev/null; then
    printf "%4s " "$(ethtool ${NIFACE[i]} 2> /dev/null | grep Speed | sed 's/\t//g;s/\///g;s/Mbs/M/g;s/1000M/1G/g' | cut -d\  -f2)"
  elif type mii-tool &> /dev/null; then
    printf "%4s " "$(mii-tool ${NIFACE[i]} 2> /dev/null | sed 's/.*negotiated \([0-9]*\).*/\1M/g;s/1000M/1G/g')"
  else
    echo '---- '
  fi

  [ "$(cat /sys/class/net/${NIFACE[i]}/carrier 2> /dev/null)" == "1" ] &&
    ASSNIP="$(ip addr show ${NIFACE[i]} | sed 's/   *//g;s/\/[0-9]*//g' | grep 'inet ' | cut -d\  -f2 | sed ':a;N;$!ba;s/\n/ /g')"
  [ -z "${ASSNIP}" ] && ASSNIP="00.00.00.00"
  [ ${OBSFCT} ] && [ "${ASSNIP}" != "00.00.00.00" ] && ASSNIP="${ASSNIP%.*.*}.X.X"
  [ $(expr length ${ASSNIP}) -gt 11 ] && FMTAIP="…${ASSNIP: -10}" || FMTAIP="${ASSNIP}"
  printf "%11s " "${FMTAIP}"

  [ "$(cat /sys/class/net/${NIFACE[i]}/carrier 2> /dev/null)" == "1" ] &&
    DHCPIP="$(dhcpcd -t 5 -T ${NIFACE[i]} 2> /dev/null | grep 'offered\|leased\| rebinding ' | sed 's/lease of //g' | cut -d\  -f3 | sort -u)"
  [ -z "${DHCPIP}" ] && DHCPIP="00.00.00.00"
  [ ${OBSFCT} ] && [ "${DHCPIP}" != "00.00.00.00" ] && DHCPIP="${DHCPIP%.*.*}.X.X"
  [ $(expr length ${DHCPIP}) -gt 11 ] && FMTDIP="…${DHCPIP: -10}" || FMTDIP="${DHCPIP}"
  printf "%11s " "${FMTDIP}"

  [ -n "${UDRDEV}" ] &&
    [ -n "$(grep -i "^Interface=${UDRDEV}$" /etc/netctl/* 2> /dev/null | cut -d: -f1 )" ] &&
      NCTLRL="${UDRDEV}"

  [ -z "${NCTLRL}" ] &&
    [ -n "$(grep -i "^Interface=${NIFACE[i]}$" /etc/netctl/* 2> /dev/null | cut -d: -f1 )" ] &&
      NCTLRL="${NIFACE[i]}"

  [ -z "${NCTLRL}" ] && NCTLRL="No"

  printf "%-7s " "${NCTLRL}"

  [ -n "${UDRDEV}" ] &&
    [ -n "$(grep -i "^Name=${UDRDEV}$" /etc/systemd/network/* 2> /dev/null | cut -d: -f1 )" ] &&
      NWKDRL="${UDRDEV}"

  [ -z "${NWKDRL}" ] &&
    [ -n "$(grep -i "^Name=${NIFACE[i]}$" /etc/systemd/network/* 2> /dev/null | cut -d: -f1 )" ] &&
      NWKDRL="${NIFACE[i]}"

  [ -z "${NWKDRL}" ] && NWKDRL="No"

  printf "%-7s\n" "${NWKDRL}"

  unset MACADD FMTMAC UDRDEV ASSNIP FMTAIP DHCPIP FMTDIP NCTLRL NWKDRL

done

printf '=%.0s' {1..79}; echo ''