#!/usr/bin/env python
#
#    NEPI, a framework to manage network experiments
#    Copyright (C) 2013 INRIA
#
#    This program is free software: you can redistribute it and/or modify
#    it under the terms of the GNU General Public License version 2 as
#    published by the Free Software Foundation;
#
#    This program is distributed in the hope that it will be useful,
#    but WITHOUT ANY WARRANTY; without even the implied warranty of
#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#    GNU General Public License for more details.
#
#    You should have received a copy of the GNU General Public License
#    along with this program.  If not, see <http://www.gnu.org/licenses/>.
#
# Author: Alina Quereilhac <alina.quereilhac@inria.fr>

from __future__ import print_function

from nepi.execution.ec import ExperimentController 

def add_ns3_node(ec, simu):
    node = ec.register_resource("ns3::Node")
    ec.register_connection(node, simu)

    ipv4 = ec.register_resource("ns3::Ipv4L3Protocol")
    ec.register_connection(node, ipv4)

    arp = ec.register_resource("ns3::ArpL3Protocol")
    ec.register_connection(node, arp)
    
    icmp = ec.register_resource("ns3::Icmpv4L4Protocol")
    ec.register_connection(node, icmp)

    udp = ec.register_resource("ns3::UdpL4Protocol")
    ec.register_connection(node, udp)

    tcp = ec.register_resource("ns3::TcpL4Protocol")
    ec.register_connection(node, tcp)

    return node

def add_device(ec, node, ip, prefix, access_point = False):
    dev = ec.register_resource("ns3::WifiNetDevice")
    ec.set(dev, "ip", ip)
    ec.set(dev, "prefix", prefix)
    ec.register_connection(node, dev)

    phy = ec.register_resource("ns3::YansWifiPhy")
    ec.set(phy, "Standard", "WIFI_PHY_STANDARD_80211a")
    ec.register_connection(dev, phy)

    error = ec.register_resource("ns3::NistErrorRateModel")
    ec.register_connection(phy, error)

    manager = ec.register_resource("ns3::ArfWifiManager")
    ec.register_connection(dev, manager)

    if access_point:
        mac = ec.register_resource("ns3::ApWifiMac")
    else:
        mac = ec.register_resource("ns3::StaWifiMac")

    ec.set(mac, "Standard", "WIFI_PHY_STANDARD_80211a")
    ec.register_connection(dev, mac)

    return dev, phy

def add_constant_mobility(ec, node, x, y, z):
    mobility = ec.register_resource("ns3::ConstantPositionMobilityModel") 
    position = "%d:%d:%d" % (x, y, z)
    ec.set(mobility, "Position", position)
    ec.register_connection(node, mobility)
    return mobility

def add_wifi_channel(ec):
    channel = ec.register_resource("ns3::YansWifiChannel")
    delay = ec.register_resource("ns3::ConstantSpeedPropagationDelayModel")
    ec.register_connection(channel, delay)

    loss  = ec.register_resource("ns3::LogDistancePropagationLossModel")
    ec.register_connection(channel, loss)

    return channel

ec = ExperimentController(exp_id = "dce-custom-wifi-ping")

node = ec.register_resource("linux::Node")
ec.set(node, "hostname", "localhost")
ec.set(node, "cleanProcesses", True)

simu = ec.register_resource("linux::ns3::Simulation")
ec.set(simu, "verbose", True)
ec.register_connection(simu, node)

nsnode1 = add_ns3_node(ec, simu)
add_constant_mobility(ec, nsnode1, 0, 0, 0)
dev1, phy1 = add_device(ec, nsnode1, "10.0.0.1", "30")

nsnode2 = add_ns3_node(ec, simu)
add_constant_mobility(ec, nsnode2, 50, 50, 0)
dev2, phy2 = add_device(ec, nsnode2, "10.0.0.2", "30", access_point = True)

# Create channel
chan = add_wifi_channel(ec)
ec.register_connection(chan, phy1)
ec.register_connection(chan, phy2)

### create applications
ping = ec.register_resource("linux::ns3::dce::Application")
ec.set (ping, "sources", "http://www.skbuff.net/iputils/iputils-s20101006.tar.bz2")
ec.set (ping, "build", "tar xvjf ${SRC}/iputils-s20101006.tar.bz2 && "
        "cd iputils-s20101006/ && "
        "sed -i 's/CFLAGS=/CFLAGS+=/g' Makefile && "
        "make CFLAGS=-fPIC LDFLAGS='-pie -rdynamic' ping && "
        "cp ping ${BIN_DCE} && cd - ")
ec.set (ping, "binary", "ping")
ec.set (ping, "stackSize", 1<<20)
ec.set (ping, "arguments", "-c 10;-s 1000;10.0.0.2")
ec.set (ping, "StartTime", "1s")
ec.set (ping, "StopTime", "20s")
ec.register_connection(ping, nsnode1)

ec.deploy()

ec.wait_finished([ping])

stdout = ec.trace(ping, "stdout") 

ec.shutdown()

print("PING OUTPUT", stdout)