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t_random_garbage.sh revision 1.2 
      1 # $NetBSD: t_random_garbage.sh,v 1.2 2020/06/27 14:04:17 jruoho Exp $
      2 #
      3 # Copyright (c) 2020 The NetBSD Foundation, Inc.
      4 # All rights reserved.
      5 #
      6 # This code is derived from software contributed to The NetBSD Foundation
      7 # by Jukka Ruohonen.
      8 #
      9 # Redistribution and use in source and binary forms, with or without
     10 # modification, are permitted provided that the following conditions
     11 # are met:
     12 # 1. Redistributions of source code must retain the above copyright
     13 #    notice, this list of conditions and the following disclaimer.
     14 # 2. Redistributions in binary form must reproduce the above copyright
     15 #    notice, this list of conditions and the following disclaimer in the
     16 #    documentation and/or other materials provided with the distribution.
     17 #
     18 # THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     19 # ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     20 # TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     21 # PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     22 # BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     23 # CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     24 # SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     25 # INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     26 # CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     27 # ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     28 # POSSIBILITY OF SUCH DAMAGE.
     29 #
     30 getrint() {
     31 	echo $(od -An -N2 -i /dev/urandom | sed 's/ //')
     32 }
     33 
     34 getrstr() {
     35 	echo $(cat /dev/urandom | head -n 1 | base64)
     36 }
     37 
     38 write_garbage() {
     39 	val=$(getrint)
     40 	echo "Test $3: write to $1 opt $2 -> $val"
     41 	ifconfig $1 $2 $val >/dev/null 2>&1
     42 	val=$(getrstr)
     43 	echo "Test $3: write to $1 opt $2 -> $val"
     44 	ifconfig $1 $2 $val >/dev/null 2>&1
     45 }
     46 
     47 atf_test_case random_garbage
     48 random_garbage_head() {
     49 	atf_set "require.user" "root"
     50 	atf_set "descr" "Test writing random garbage to ifconfig(8) options"
     51 }
     52 
     53 random_garbage_body() {
     54 
     55 	# Please note:
     56 	#
     57 	# 1. As some drivers seem to have input validation issues, it may
     58 	#    be possible that horrors are written directly to the hardware.
     59 	#
     60 	# 2. Even if the test passes, there is no easy way to restore
     61 	#    the existing state/configuration of any given interface.
     62 	#
     63 	# Take care.
     64 	#
     65 	atf_skip "The test is not safe"
     66 
     67 	opts="advbase advskew broadcast carpdev description \
     68 	      media mediaopt -mediaopt mode instance metric mtu \
     69 	      netmask state frag rts ssid nwid nwkey pass powersavesleep \
     70 	      bssid chan tunnel session cookie pltime prefixlen linkstr \
     71 	      vhid vlan vlanif -vlanif agrport -agrport vltime maxupd \
     72 	      syncdev syncpeer"
     73 
     74 	for i in $(ifconfig -l); do
     75 
     76 		ifconfig $i up
     77 
     78 		for o in $opts; do
     79 
     80 			n=10
     81 
     82 			while [ $n -gt 0 ]; do
     83 				write_garbage $i $o $n
     84 				n=$(expr $n - 1)
     85 			done
     86 		done
     87 	done
     88 
     89 	atf_pass
     90 }
     91 
     92 atf_init_test_cases() {
     93 	atf_add_test_case random_garbage
     94 }
     95