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#!/bin/sh
# -*-sh-basic-offset: 4-*-
# Usage: udp_proxy_wrapper.sh [PROXY_PARAM...] -- [SERVER_PARAM...]
#
# Copyright The Mbed TLS Contributors
# SPDX-License-Identifier: Apache-2.0
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
set -u
MBEDTLS_BASE="$(dirname -- "$0")/../.."
TPXY_BIN="$MBEDTLS_BASE/programs/test/udp_proxy"
SRV_BIN="$MBEDTLS_BASE/programs/ssl/ssl_server2"
: ${VERBOSE:=0}
stop_proxy() {
if [ -n "${tpxy_pid:-}" ]; then
echo
echo " * Killing proxy (pid $tpxy_pid) ..."
kill $tpxy_pid
fi
}
stop_server() {
if [ -n "${srv_pid:-}" ]; then
echo
echo " * Killing server (pid $srv_pid) ..."
kill $srv_pid >/dev/null 2>/dev/null
fi
}
cleanup() {
stop_server
stop_proxy
exit 129
}
trap cleanup INT TERM HUP
# Extract the proxy parameters
tpxy_cmd_snippet='"$TPXY_BIN"'
while [ $# -ne 0 ] && [ "$1" != "--" ]; do
tail="$1" quoted=""
while [ -n "$tail" ]; do
case "$tail" in
*\'*) quoted="${quoted}${tail%%\'*}'\\''" tail="${tail#*\'}";;
*) quoted="${quoted}${tail}"; tail=; false;;
esac
done
tpxy_cmd_snippet="$tpxy_cmd_snippet '$quoted'"
shift
done
unset tail quoted
if [ $# -eq 0 ]; then
echo " * No server arguments (must be preceded by \" -- \") - exit"
exit 3
fi
shift
dtls_enabled=
ipv6_in_use=
server_port_orig=
server_addr_orig=
for param; do
case "$param" in
server_port=*) server_port_orig="${param#*=}";;
server_addr=*:*) server_addr_orig="${param#*=}"; ipv6_in_use=1;;
server_addr=*) server_addr_orig="${param#*=}";;
dtls=[!0]*) dtls_enabled=1;;
esac
done
if [ -z "$dtls_enabled" ] || [ -n "$ipv6_in_use" ]; then
echo >&2 "$0: Couldn't find DTLS enabling, or IPv6 is in use - immediate fallback to server application..."
if [ $VERBOSE -gt 0 ]; then
echo "[ $SRV_BIN $* ]"
fi
exec "$SRV_BIN" "$@"
fi
if [ -z "$server_port_orig" ]; then
server_port_orig=4433
fi
echo " * Server port: $server_port_orig"
tpxy_cmd_snippet="$tpxy_cmd_snippet \"listen_port=\$server_port_orig\""
tpxy_cmd_snippet="$tpxy_cmd_snippet \"server_port=\$server_port\""
if [ -n "$server_addr_orig" ]; then
echo " * Server address: $server_addr_orig"
tpxy_cmd_snippet="$tpxy_cmd_snippet \"server_addr=\$server_addr_orig\""
tpxy_cmd_snippet="$tpxy_cmd_snippet \"listen_addr=\$server_addr_orig\""
fi
server_port=$(( server_port_orig + 1 ))
set -- "$@" "server_port=$server_port"
echo " * Intermediate port: $server_port"
echo " * Start proxy in background ..."
if [ $VERBOSE -gt 0 ]; then
echo "[ $tpxy_cmd_snippet ]"
fi
eval exec "$tpxy_cmd_snippet" >/dev/null 2>&1 &
tpxy_pid=$!
if [ $VERBOSE -gt 0 ]; then
echo " * Proxy ID: $TPXY_PID"
fi
echo " * Starting server ..."
if [ $VERBOSE -gt 0 ]; then
echo "[ $SRV_BIN $* ]"
fi
exec "$SRV_BIN" "$@" >&2 &
srv_pid=$!
wait $srv_pid
stop_proxy
return 0
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