#!/bin/bash

function wait_for_network_namespace {
    # Wait that the namespace is ready.
    COUNTER=0
    while [ $COUNTER -lt 40 ]; do
        if nsenter --preserve-credentials -U -n --target=$1 true; then
            break
        else
            sleep 0.5
        fi
        let COUNTER=COUNTER+1
    done
}

function wait_for_network_device {
    # Wait that the device appears.
    COUNTER=0
    while [ $COUNTER -lt 40 ]; do
        if nsenter --preserve-credentials -U -n --target=$1 ip addr show $2; then
            break
        else
            sleep 0.5
        fi
        let COUNTER=COUNTER+1
    done
}

function wait_process_exits {
    COUNTER=0
    while [ $COUNTER -lt 40 ]; do
        if  kill -0 $1; then
            sleep 0.5
        else
            break
        fi
        let COUNTER=COUNTER+1
    done
}

function wait_for_ping_connectivity {
    COUNTER=0
    while [ $COUNTER -lt 40 ]; do
        if nsenter --preserve-credentials -U -n --target=$1 ping -c 1 -w 1 $2; then
            break
        else
            sleep 0.5
        fi
        let COUNTER=COUNTER+1
    done
}

function wait_for_file_content {
    # Wait for a file to get the specified content.
    COUNTER=0
    while [ $COUNTER -lt 20 ]; do
        if grep $1 $2; then
            break
        else
            sleep 0.5
        fi
        let COUNTER=COUNTER+1
    done
}

function expose_tcp() {
    apisock=$1 hostport=$2 guestport=$3
    json="{\"execute\": \"add_hostfwd\", \"arguments\": {\"proto\": \"tcp\", \"host_addr\": \"0.0.0.0\", \"host_port\": $hostport, \"guest_addr\": \"10.0.2.100\", \"guest_port\": $guestport}}"
    echo -n $json | ncat -U $apisock
    echo -n "{\"execute\": \"list_hostfwd\"}" | ncat -U $apisock
}