sshuttle/hack/exec-tool

#!/usr/bin/env bash
set -e

args=()
while [[ $# -gt 0 ]]; do
    arg=$1
    shift
    case "$arg" in
    -6)
        ipv6_only=true
        continue
        ;;
    -*) ;;
    *)
        if [[ -z $tool ]]; then
            tool=$arg
            continue
        elif [[ -z $node ]]; then
            node=$arg
            continue
        fi
        ;;
    esac
    args+=("$arg")
done

tool=${tool?:"tool argument missing. should be one of iperf3,ping,curl,ab"}
node=${node?:"node argument missing. should be 'node-1' , 'node-2' etc"}

if [[ $node == node-* ]]; then
    index=${node#node-}
    if [[ $ipv6_only == true ]]; then
        host="2001:0DB8::55$index"
    else
        host="10.55.$index.77"
    fi
else
    host=$node
fi

connect_timeout_sec=3

function with_set_x() {
    set -x
    "$@"
    {
        ec=$?
        set +x
        return $ec
    } 2>/dev/null
}

case "$tool" in
ping)
    with_set_x exec ping -W $connect_timeout_sec "${args[@]}" "$host"
    ;;
iperf3)
    port=5001
    with_set_x exec iperf3 --client "$host" --port=$port --connect-timeout=$((connect_timeout_sec * 1000)) "${args[@]}"
    ;;
curl)
    port=8080
    if [[ $host = *:* ]]; then
        host="[$host]"
        args+=(--ipv6)
    fi
    with_set_x exec curl "http://$host:$port/" -v --connect-timeout $connect_timeout_sec "${args[@]}"
    ;;
ab)
    port=8080
    if [[ " ${args[*]}" != *" -n "* && " ${args[*]}" != *" -c "* ]]; then
        args+=(-n 500 -c 50 "${args[@]}")
    fi
    with_set_x exec ab -s $connect_timeout_sec "${args[@]}" "http://$host:$port/"
    ;;
*)
    echo "Unknown tool: $tool" >&2
    exit 2
    ;;
esac