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      1 #!/bin/sh
      2 
      3 set -eu
      4 
      5 ping_once()
      6 {
      7 	type ping${1} >/dev/null 2>&1 && PING="ping${1}" || PING="ping -${1}"
      8 	$PING -q -c 1 -W 1 ${2%%/*} >/dev/null 2>&1
      9 }
     10 
     11 wait_for_ip()
     12 {
     13 	local _i
     14 	echo -n "Wait for testing IPv4/IPv6 to become available "
     15 	for _i in $(seq ${MAX_PING_TRIES}); do
     16 		echo -n "."
     17 		if ping_once 4 ${TEST_IPv4} && ping_once 6 ${TEST_IPv6}; then
     18 			echo " OK"
     19 			return
     20 		fi
     21 	done
     22 	echo 1>&2 "ERROR: Timeout waiting for test IP to become available."
     23 	exit 1
     24 }
     25 
     26 setup()
     27 {
     28 	# Create testing interfaces not to interfere with current environment.
     29 	ip link add dev ${TEST_IF} type veth peer name ${TEST_IF_PEER}
     30 	ip link set ${TEST_IF} up
     31 	ip link set ${TEST_IF_PEER} up
     32 
     33 	ip -4 addr add ${TEST_IPv4} dev ${TEST_IF}
     34 	ip -6 addr add ${TEST_IPv6} dev ${TEST_IF}
     35 	wait_for_ip
     36 }
     37 
     38 cleanup()
     39 {
     40 	ip link del ${TEST_IF} 2>/dev/null || :
     41 	ip link del ${TEST_IF_PEER} 2>/dev/null || :
     42 }
     43 
     44 main()
     45 {
     46 	trap cleanup EXIT 2 3 6 15
     47 	setup
     48 	./test_sock_addr setup_done
     49 }
     50 
     51 BASENAME=$(basename $0 .sh)
     52 TEST_IF="${BASENAME}1"
     53 TEST_IF_PEER="${BASENAME}2"
     54 TEST_IPv4="127.0.0.4/8"
     55 TEST_IPv6="::6/128"
     56 MAX_PING_TRIES=5
     57 
     58 main
     59