name : test_sock_addr.sh #!/bin/sh set -eu ping_once() { type ping${1} >/dev/null 2>&1 && PING="ping${1}" || PING="ping -${1}" $PING -q -c 1 -W 1 ${2%%/*} >/dev/null 2>&1 } wait_for_ip() { local _i echo -n "Wait for testing IPv4/IPv6 to become available " for _i in $(seq ${MAX_PING_TRIES}); do echo -n "." if ping_once 4 ${TEST_IPv4} && ping_once 6 ${TEST_IPv6}; then echo " OK" return fi done echo 1>&2 "ERROR: Timeout waiting for test IP to become available." exit 1 } setup() { # Create testing interfaces not to interfere with current environment. ip link add dev ${TEST_IF} type veth peer name ${TEST_IF_PEER} ip link set ${TEST_IF} up ip link set ${TEST_IF_PEER} up ip -4 addr add ${TEST_IPv4} dev ${TEST_IF} ip -6 addr add ${TEST_IPv6} dev ${TEST_IF} wait_for_ip } cleanup() { ip link del ${TEST_IF} 2>/dev/null || : ip link del ${TEST_IF_PEER} 2>/dev/null || : } main() { trap cleanup EXIT 2 3 6 15 setup ./test_sock_addr setup_done } BASENAME=$(basename $0 .sh) TEST_IF="${BASENAME}1" TEST_IF_PEER="${BASENAME}2" TEST_IPv4="127.0.0.4/8" TEST_IPv6="::6/128" MAX_PING_TRIES=5 main