ssh-proxy

#!/bin/bash
set -e
cd $(dirname $0)

REMOTE_USERNAME=${1:-vscode}
SSH_PORT=${2:-2222}
SSH_HOST=${3:-127.0.0.1}
LOCAL_PROXY_PORT=${4:-4040}
REMOTE_PROXY_PORT=${5:-1080}

if [ -f "ips-to-proxy.conf" ]; then
    IP_RANGES_TO_PROXY="$(cat ips-to-proxy.conf | tr '\n' ' ')"
else
    IP_RANGES_TO_PROXY="all"
fi

if [ "$(docker ps -q -f 'name=codespaces-local-proxy-server')" != "" ]; then
    docker rm --force codespaces-local-proxy-server > /dev/null
fi

cd src/proxy
echo 'Building proxy image...'
docker build --build-arg "DANTED_PORT=${LOCAL_PROXY_PORT}" -t codespaces-local-proxy-server .
echo 'Starting proxy...'
docker run -d --rm --name codespaces-local-proxy-server -p 127.0.0.1:${LOCAL_PROXY_PORT}:${LOCAL_PROXY_PORT} -p 127.0.0.1:${LOCAL_PROXY_PORT}:${LOCAL_PROXY_PORT}/udp codespaces-local-proxy-server
cd ..

echo 'Wiring up codespace...'
ssh -tt -R 127.0.0.1:${REMOTE_PROXY_PORT}:127.0.0.1:${LOCAL_PROXY_PORT} -p ${SSH_PORT} -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null ${REMOTE_USERNAME}@${SSH_HOST} bash -s << EOF
cat << 'SCRIPTEOF' | sudo tee /etc/redsocks.conf.orig > /dev/null
$(cat redsocks.conf)
SCRIPTEOF
cat << 'SCRIPTEOF' | sudo tee /usr/local/bin/proxy-connect > /dev/null
$(cat proxy-connect)
SCRIPTEOF
cat << 'SCRIPTEOF' | sudo tee /usr/local/bin/proxy-reset > /dev/null
$(cat proxy-reset)
SCRIPTEOF
clear && sudo proxy-connect 127.0.0.1 ${REMOTE_PROXY_PORT} ${IP_RANGES_TO_PROXY} && echo -e "\nPress Ctrl+C to disconnect!" && sleep infinity
EOF

echo -e '\nShutting down local proxy...'
docker stop codespaces-local-proxy-server > /dev/null