path: root/scripts/rl-system.init

#!/bin/bash
# **** License ****
# Version: VPL 1.0
#
# The contents of this file are subject to the Vyatta Public License
# Version 1.0 ("License"); you may not use this file except in
# compliance with the License. You may obtain a copy of the License at
# http://www.vyatta.com/vpl
#
# Software distributed under the License is distributed on an "AS IS"
# basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
# the License for the specific language governing rights and limitations
# under the License.
#
# This code was originally developed by Vyatta, Inc.
# Portions created by Vyatta are Copyright (C) 2007 Vyatta, Inc.
# All Rights Reserved.
#
# Author:	Tom Grennan <tgrennan@vyatta.com>
# Description:	Vyatta Router system setup
#		this is an indirect init sub-script executed by ofr.init
#
# **** End License ****

ACTION=$1

[[ $PATH == *${ofr_bindir}* ]] || PATH+=:${ofr_bindir}
[[ $PATH == *${ofr_sbindir}* ]] || PATH+=:${ofr_sbindir}

export PATH

. /lib/lsb/init-functions

IPROUTE2IP=ip
INIT_PID=$$
IFTAB=/etc/iftab

## BOOTFILE is provided by ofr.init
: ${BOOTFILE:=$prefix/etc/config/config.boot}

declare -a cfg_eth_hwid
declare -a sys_eth_mac
declare -a sys_vmnets

# load hwid array from config file as follows
# interface {
# ...
#     ethernet eth# {
#     ...
#	 hw-id: XX:XX:XX:XX:XX:XX
#     ...
#     }
# }
#
# cfg_eth_hwid[#]=xx:xx:xx:xx:xx:xx

load_cfg_eth_hwid ()
{
    eval $( sed -n '
    /^interfaces {/,/^}/ {
	/^ *ethernet eth[0-9]* {/,/^    $/ {
	    /^ *ethernet/ {
		s/.* eth\([0-9]\+\) {$/cfg_eth_hwid[\1]=/
# hold interface name
		h
	    }
	    /^.*hw-id:/ {
# translate field name
		s/.*hw-id: *//
# tolower hex mac address
		y/ABCDEF/abcdef/
# exchange hold and pattern space
		x
# concatenate hold and pattern
		G
		s/\n//p
	    }
	}
    }' $BOOTFILE )
}

# load system eth mac tabled from ip link

load_sys_eth_mac ()
{
    eval $( ip link show | sed -n '
    /^[0-9]*: eth[0-9]*: /,+1 {
# combine 2 line interface output...
# 2: eth0: <BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast qlen 1000
#    link/ether 00:13:72:57:48:f9 brd ff:ff:ff:ff:ff:ff
	h
	n
	x
	G
	s/\n//
# translate to:
# #=00:13:72:57:48:f9
	s/^.*eth\([0-9]\+\):.*link\/ether \([0-9A-Fa-f:]\+\) .*$/sys_eth_mac[\1]=\2/p
    }' )
}

load_sys_vmnets ()
{
    sys_vmnets=( $( ip link show |
	sed -n 's/^[0-9]*: \(vmnet[0-9]*\).*$/\1/p' ) )
}


have_cfg_eth_hwid ()
{
    local mac=$1

    for hwid in ${cfg_eth_hwid[@]} ; do
	[ $hwid == $mac ] && return 0
    done
    false
}

have_sys_eth_mac ()
{
    local hwid=$1

    for mac in ${sys_eth_mac[@]} ; do
	[ $hwid == $mac ] && return 0
    done
    false
}

# update cfg table with results from system mac detection
# first remove cfg itfs that are no longer in sys table
# if sys mac is already in cfg table, use cfg itf assignment;
# if sys mac isnot in cfg table but given index has hwid of
# another sys itf, add to cfg table in first available slot
# otherwise, [re-]assign cfg eth hwid with sys mac

update_cfg_eth_hwid ()
{
    local -i i

    for i in ${!cfg_eth_hwid[@]} ; do
	if ! have_sys_eth_mac ${cfg_eth_hwid[$i]} ; then
	    unset cfg_eth_hwid[$i]
	fi
    done
    for i in ${!sys_eth_mac[@]} ; do
	if ! have_cfg_eth_hwid ${sys_eth_mac[$i]} ; then
	    if [ -n "${cfg_eth_hwid[$i]}" ] ; then
		# cfg[#] has mac of another sys itf;
		# so, add another cfg itf for this mac
		# to the first available slot
		for (( j=0 ; true ; j++ )) ; do
		    if [ -z "${cfg_eth_hwid[$j]}" ] ; then
			cfg_eth_hwid[$j]=${sys_eth_mac[$i]}
			break 1
		    fi
		done
	    else
		cfg_eth_hwid[$i]=${sys_eth_mac[$i]}
	    fi
	fi
    done
}

write_iftab ()
{
    local -i i

    rm -f $IFTAB
    for i in ${!cfg_eth_hwid[@]} ; do
	echo "eth$i mac ${cfg_eth_hwid[$i]}" >> $IFTAB
    done
}

mod_bootfile_eth_hwid ()
{
    local eth=$1 hwid=$2

    sed -i '/^interfaces {$/,/^}/ {
    /^    ethernet '"$eth"' {$/,/^    }$/ {
	/^ *hw-id/c\
        hw-id: '"$hwid"'
    }}' $BOOTFILE
}

add_bootfile_eth_hwid ()
{
    local eth=$1 hwid=$2

    sed -i '/^interfaces {$/,/^}$/ {
	/^}$/i\
    ethernet '"$eth"' {\
        hw-id: '"$hwid"'\
    }
	}' $BOOTFILE
}

update_bootfile_eth_hwid ()
{
    local -i i

    for i in ${!cfg_eth_hwid[@]} ; do
	if grep -q "ethernet eth$i {" $BOOTFILE ; then
	    mod_bootfile_eth_hwid eth$i ${cfg_eth_hwid[$i]}
	else
	    add_bootfile_eth_hwid eth$i ${cfg_eth_hwid[$i]}
	fi
    done
}

add_bootfile_vmnet ()
{
    local vmnet=$1

    sed -i '/^interfaces {/,/^}$/ {
	/^}$/i\
    ethernet '"$vmnet"' {\
    }
	}' $BOOTFILE
}

update_bootfile_vmnets ()
{
    for vmnet in ${sys_vmnets[@]} ; do
	if ! grep -q "ethernet $vmnet {" $BOOTFILE ; then
	    add_bootfile_vmnet $vmnet
	fi
    done
}

itfmess ()
{
    load_cfg_eth_hwid
    load_sys_eth_mac
    load_sys_vmnets
    update_cfg_eth_hwid
    write_iftab
    update_bootfile_eth_hwid
    update_bootfile_vmnets
}

maybe_ifrename () {
    if [ -e $IFTAB ] ; then
	ifrename -d -p -t
    fi
}

search_config_if_wan () {
    grep "\<serial\>.*\<$1\>" $BOOTFILE >/dev/null
}

add_new_serial_if () {
    __config_additions=/tmp/__config_additions
    rm -f $__config_additions
    ip link show |
    sed -n '/^[0-9]*: wan[0-9]*:/ s/.* \([^:]*\):.*$/\1/p' |
    while read wan ; do
	if ! search_config_if_wan $wan ; then
	    echo "    serial $wan" >> $__config_additions
	fi
    done
    if [ -e $__config_additions ]; then
	rm -f /tmp/__bootfile
	sed '/^interfaces {$/ r '$__config_additions \
	    $BOOTFILE > /tmp/__bootfile
	mv /tmp/__bootfile $BOOTFILE
	rm -f $__config_additions
    fi
}

reset_promiscous_arp_response () {
    echo 1 > /proc/sys/net/ipv4/conf/default/arp_filter 
}

set_ip_forwarding () {
    echo 1 > /proc/sys/net/ipv4/ip_forward
}

## if a primary address is removed from an interface promote and
## secondary available
set_promote_secondaries () {
    echo 1 > /proc/sys/net/ipv4/conf/all/promote_secondaries
}

## if present use hostname from config file
maybe_hostname () {
    hn=$(sed -n '/^system {$/,/^}$/ {
	/^ \+host-name:/ {
	    s/^[^:]*: *//
	    s/"//g
	    p
	}
    }' $BOOTFILE )
    test -n "$hn" && hostname ${hn}
}

## Update the version information
update_version_info () {
    if [ -f ${ofr_sysconfdir}/version.master ]; then
	cp ${ofr_sysconfdir}/version.master ${ofr_sysconfdir}/version
    fi
}

## Clear out apt config file--it will be filled in by rtrmgr
clear_apt_config()
{
	>/etc/apt/sources.list
}

## snmp should be a separate package,
## but for now load the kernel module here
add_snmp_stats_module()
{
	modprobe ipt_rlsnmpstats
}

set_reboot_on_panic()
{
  echo 1 > /proc/sys/kernel/panic_on_oops
  echo 60 > /proc/sys/kernel/panic
}

start () {
    set_reboot_on_panic
    itfmess
    maybe_ifrename
    add_new_serial_if
    reset_promiscous_arp_response
    set_ip_forwarding
    set_promote_secondaries
    maybe_hostname
    update_version_info
    clear_apt_config
    add_snmp_stats_module
}

case "$ACTION" in
    start) start ;;
    stop|restart|force-reload) true ;; # nothing to stop/restart
    *)	log_failure_msg "action unknown: $ACTION" ;
	false ;;
esac

exit $?


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