#!/bin/sh

linphone_socket=/tmp/linphonec-$(id -u)

warn() { printf '%s\n' "$0" "${*:-something is wrong.}" >&2; }
die() { warn "$@"; exit 1; }

init()
{
    out=$(linphonecsh init -CD 2>&1)
    [ -z "$out" ] && return
    case "$out" in
        *'running linphonec has been found'*)
            printf '%s\n' "$out" >&2
            return 1 ;;
        '')
            return 0 ;;
        *)
            die "Error: unexpected output from linphonecsh: $out" ;;
    esac
}

wait_for_linphone_socket()
{
    for n in $(seq 1 50); do
        test -e ${linphone_socket} && break
        sleep 0.1
    done
}

getip()
{
    upnpc -s|sed -ne 's/^ExternalIPAddress = //p'
}

generic()
{
    linphonecsh generic "$*"
}

atexit()
{
    if [ "$kill_linphonec" ]; then
        linphonecsh exit
    fi
}

init
trap atexit EXIT

wait_for_linphone_socket

if ip=$(getip); then
    generic nat $ip
    generic firewall nat
fi

generic friend list