#!/bin/sh
#
# Copyright (C) Internet Systems Consortium, Inc. ("ISC")
#
# SPDX-License-Identifier: MPL-2.0
#
# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, you can obtain one at https://mozilla.org/MPL/2.0/.
#
# See the COPYRIGHT file distributed with this work for additional
# information regarding copyright ownership.

#
# Set up interface aliases for bind9 system tests.
#
# IPv4: 10.53.0.{1..11}				RFC 1918
#       10.53.1.{1..2}
#       10.53.2.{1..2}
# IPv6: fd92:7065:b8e:ffff::{1..11}		ULA
#       fd92:7065:b8e:99ff::{1..2}
#       fd92:7065:b8e:ff::{1..2}
#
# We also set the MTU on the 1500 bytes to match the default MTU on physical
# interfaces, so we can properly test the cases with packets bigger than
# interface MTU.
#
# See also org.isc.bind.system (a version of this script for use on macOS)
# and testsock.pl (which checks the interfaces are configured)
#

top_srcdir=@abs_top_srcdir@

sys=$(@SHELL@ "$top_srcdir/config.guess")

use_ip=
case "$sys" in
  *-*-linux*)
    if type ip >/dev/null; then
      use_ip=yes
    elif type ifconfig >/dev/null; then
      :
    else
      echo "$0: can't find ip or ifconfig" >&2
      exit 1
    fi
    ;;
esac

up() {
  case "$sys" in
    *-pc-solaris2.5.1)
      [ "$a" ] && ifconfig lo0:$int $a netmask 0xffffffff up
      ;;
    *-sun-solaris2.[6-7])
      [ "$a" ] && ifconfig lo0:$int $a netmask 0xffffffff up
      ;;
    *-*-solaris2.[8-9] | *-*-solaris2.10)
      [ "$a" ] && {
        /sbin/ifconfig lo0:$int plumb
        /sbin/ifconfig lo0:$int $a up
        /sbin/ifconfig lo0:$int mtu 1500
      }
      [ "$aaaa" ] && {
        /sbin/ifconfig lo0:$int inet6 plumb
        /sbin/ifconfig lo0:$int inet6 $aaaa up
      }
      ;;
    *-*-solaris2.1[1-9])
      [ "$a" ] && {
        /sbin/ipadm create-addr -t -T static \
          -a $a lo0/bind9v4$int \
          || echo failed lo0/bind9v4$int
      }
      [ "$aaaa" ] && {
        /sbin/ipadm create-addr -t -T static \
          -a $aaaa lo0/bind9v6$int \
          || echo failed lo0/bind9v6$int
      }
      ;;
    *-*-linux*)
      if [ "$use_ip" ]; then
        ip address add $a/24 dev lo:$int
        ip link set dev lo:$int mtu 1500
        [ "$aaaa" ] && ip address add $aaaa/64 dev lo
      else
        ifconfig lo:$int $a up netmask 255.255.255.0 mtu 1500
        [ "$aaaa" ] && ifconfig lo inet6 add $aaaa/64
      fi
      ;;
    *-unknown-freebsd*)
      [ "$a" ] && ifconfig lo0 $a alias netmask 0xffffffff mtu 1500
      [ "$aaaa" ] && ifconfig lo0 inet6 $aaaa alias
      ;;
    *-unknown-dragonfly* | *-unknown-netbsd* | *-unknown-openbsd*)
      [ "$a" ] && ifconfig lo0 $a alias netmask 255.255.255.0 mtu 1500
      [ "$aaaa" ] && ifconfig lo0 inet6 $aaaa alias
      ;;
    *-*-bsdi[3-5].*)
      [ "$a" ] && ifconfig lo0 add $a netmask 255.255.255.0
      ;;
    *-dec-osf[4-5].*)
      [ "$a" ] && ifconfig lo0 alias $a
      ;;
    *-sgi-irix6.*)
      [ "$a" ] && ifconfig lo0 alias $a
      ;;
    *-*-sysv5uw7* | *-*-sysv*UnixWare* | *-*-sysv*OpenUNIX*)
      [ "$a" ] && ifconfig lo0 $a alias netmask 0xffffffff
      ;;
    *-ibm-aix4.* | *-ibm-aix5.*)
      [ "$a" ] && ifconfig lo0 alias $a
      [ "$aaaa" ] && ifconfig lo0 inet6 alias -dad $aaaa/64
      ;;
    hpux)
      [ "$a" ] && ifconfig lo0:$int $a netmask 255.255.255.0 up
      [ "$aaaa" ] && ifconfig lo0:$int inet6 $aaaa up
      ;;
    *-sco3.2v*)
      [ "$a" ] && ifconfig lo0 alias $a
      ;;
    *-darwin*)
      [ "$a" ] && ifconfig lo0 alias $a
      [ "$aaaa" ] && ifconfig lo0 inet6 $aaaa alias
      ;;
    *)
      echo "Don't know how to set up interface.  Giving up."
      exit 1
      ;;
  esac
}

down() {
  case "$sys" in
    *-pc-solaris2.5.1)
      [ "$a" ] && ifconfig lo0:$int 0.0.0.0 down
      ;;
    *-sun-solaris2.[6-7])
      [ "$a" ] && ifconfig lo0:$int $a down
      ;;
    *-*-solaris2.[8-9] | *-*-solaris2.10)
      [ "$a" ] && {
        ifconfig lo0:$int $a down
        ifconfig lo0:$int $a unplumb
      }
      [ "$aaaa" ] && {
        ifconfig lo0:$int inet6 down
        ifconfig lo0:$int inet6 unplumb
      }
      ;;
    *-*-solaris2.1[1-9])
      [ "$a" ] && {
        ipadm delete-addr lo0/bind9v4$int \
          || echo failed lo0/bind9v4$int
      }
      [ "$aaaa" ] && {
        ipadm delete-addr lo0/bind9v6$int \
          || echo failed lo0/bind9v6$int
      }
      ;;

    *-*-linux*)
      if [ "$use_ip" ]; then
        [ "$a" ] && ip address del $a/24 dev lo:$int
        [ "$aaaa" ] && ip address del $aaaa/64 dev lo
      else
        [ "$a" ] && ifconfig lo:$int $a down
        [ "$aaaa" ] && ifconfig lo inet6 del $aaaa/64
      fi
      ;;
    *-unknown-freebsd*)
      [ "$a" ] && ifconfig lo0 $a delete
      [ "$aaaa" ] && ifconfig lo0 inet6 $aaaa delete
      ;;
    *-unknown-netbsd*)
      [ "$a" ] && ifconfig lo0 $a delete
      [ "$aaaa" ] && ifconfig lo0 inet6 $aaaa delete
      ;;
    *-unknown-openbsd*)
      [ "$a" ] && ifconfig lo0 $a delete
      [ "$aaaa" ] && ifconfig lo0 inet6 $aaaa delete
      ;;
    *-*-bsdi[3-5].*)
      [ "$a" ] && ifconfig lo0 remove $a
      ;;
    *-dec-osf[4-5].*)
      [ "$a" ] && ifconfig lo0 -alias $a
      ;;
    *-sgi-irix6.*)
      [ "$a" ] && ifconfig lo0 -alias $a
      ;;
    *-*-sysv5uw7* | *-*-sysv*UnixWare* | *-*-sysv*OpenUNIX*)
      [ "$a" ] && ifconfig lo0 -alias $a
      ;;
    *-ibm-aix4.* | *-ibm-aix5.*)
      [ "$a" ] && ifconfig lo0 delete $a
      [ "$aaaa" ] && ifconfig lo0 delete inet6 $aaaa/64
      ;;
    hpux)
      [ "$a" ] && ifconfig lo0:$int 0.0.0.0
      [ "$aaaa" ] && ifconfig lo0:$int inet6 ::
      ;;
    *-sco3.2v*)
      [ "$a" ] && ifconfig lo0 -alias $a
      ;;
    *darwin*)
      [ "$a" ] && ifconfig lo0 -alias $a
      [ "$aaaa" ] && ifconfig lo0 inet6 $aaaa delete
      ;;
    *)
      echo "Don't know how to destroy interface.  Giving up."
      exit 1
      ;;
  esac
}

sequence() (
  awk -v s=$1 -v e=$2 '
		BEGIN {
			for (i = s ; i <= e; i++) { print i; }
			exit;
		}'
)

#
# 'max', 'i' and 'ns' are used to compute the interface identifier for
# systems that need it and must be unique for each interface (e.g. lo:$int).
#
#	int=$((i * max + ns))
#
# 'max' is the number of nameservers configured in the inner loop.
# 'i' is the outer loop counter.
# 'ns' in the namserver being configured.
# 'int' interface identifier.
#
# See also `org.isc.bind.system`.
#
# This `max` setting is grepped out for use by testsock.pl
#
max=11
case $1 in
  start | up | stop | down)
    for i in $(sequence 0 2); do
      case $i in
        0) ipv6="ff" ;;
        1) ipv6="99" ;;
        2) ipv6="00" ;;
        *) ipv6="" ;;
      esac
      for ns in $(sequence 1 $max); do
        [ $i -gt 0 -a $ns -gt 2 ] && break
        int=$((i * max + ns))
        a=10.53.$i.$ns
        aaaa=fd92:7065:b8e:${ipv6}ff::$ns
        case "$1" in
          start | up) up ;;
          stop | down) down ;;
        esac
      done
    done
    ;;
  *)
    echo "Usage: $0 { up | down }"
    exit 1
    ;;
esac