iproute

#! /bin/sh
#  (Bourne shell script) -- 

WHITE=$(setterm -bold on)
NORMAL=$(setterm -default)
_PAGER="less -R -S"


iproute_filter()
{
  sed -e '/ \(\x1b[^a-z]*.\)\?via/ !s/ \(\x1b[^a-z]*.\)\?dev /\t&/' \
      -e '/ \(\x1b[^a-z]*.\)\?proto/ !s/ \(\x1b[^a-z]*.\)\?scope /\t&/' \
      -e 's/ \(\x1b[^a-z]*.\)\?\(dev\|via\) /\t/g' \
      -e '/ \(\x1b[^a-z]*.\)\?metric/ !s/ \(\x1b[^a-z]*.\)\?linkdown /\t&/' \
      -e 's/[[:space:]]\(\x1b[^a-z]*.\)\?\(proto\|scope\|link\|src\|metric\)\>//g'
}


# Columns, colours, pager, headings
show_table()
{
  name=$1
  id=
  echo "$name:" ##  $id
  echo ${WHITE}Dest Via Dev Proto Src Metric Flags${NORMAL}
  ip $IP_FORCE_COLOUR_OPT route show table $1 |
    sed -e '/ \(\x1b[^a-z]*.\)\?src/ !s/ \(\x1b[^a-z]*.\)\?metric /\t&/' |
    iproute_filter
}


# *** MAINLINE ***
{
  show_table main
  for table in $(awk '/^\s*[0-9]/ && $1 != 0 && $1 != 253 && $1 != 254 && $1 != 255 {print $2}' /etc/iproute2/rt_tables $(ls /etc/iproute2/rt_tables.d/*.conf | grep -v '\*\.conf$')) ; do
    echo
    show_table $table
  done
  echo

  # IPv6
  echo ${WHITE}Dest Via Dev Proto Metric Flags${NORMAL}
  ip -6 $IP_FORCE_COLOUR_OPT route |
    iproute_filter
} |
  column -tn -e |
  $_PAGER