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      1 # $NetBSD: t_repeated_mtu.sh,v 1.2 2020/12/10 08:16:59 mrg 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.
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     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
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     30 
     31 atf_test_case repeated_mtu
     32 repeated_mtu_head() {
     33 	atf_set "require.user" "root"
     34 	atf_set "descr" "Check with ifconfig(8) that setting MTUs works"
     35 }
     36 
     37 repeated_mtu_body() {
     38 
     39 	if ! [ $(atf_config_get "run_unsafe" "no") = "yes" ]
     40 	then
     41 		atf_skip "can disrupt networking; also PR port-evbarm/55521"
     42 	fi
     43 
     44 	# This sequence covers both valid and invalid MTUs; we are
     45 	# only interested in testing that the system does not hang.
     46 	#
     47 	mtus=$(seq -10000 1000 90000)
     48 
     49 	for i in $(ifconfig -l); do
     50 
     51 		mtu=$(ifconfig $i | grep "mtu" | sed "s/.*mtu //")
     52 
     53 		if [ -z $mtu ]; then
     54 			echo "Skipping $i"
     55 			continue
     56 		fi
     57 
     58 		for j in $mtus; do
     59 			echo "Request: ifconfig $i mtu $j"
     60 			ifconfig $i mtu $j >/dev/null 2>&1
     61 		done
     62 
     63 		ifconfig $i mtu $mtu
     64 		echo "Restored the MTU of $i to $mtu"
     65 	done
     66 }
     67 
     68 atf_init_test_cases() {
     69 	atf_add_test_case repeated_mtu
     70 }
     71