## -*- Mode: python; py-indent-offset: 4; indent-tabs-mode: nil; coding: utf-8; -*-

import os

import sys

import Options

import Logs

import Utils

import Task

# Required NSC version

NSC_RELEASE_NAME = "nsc-0.5.0"

def set_options(opt):

    opt.add_option('--with-nsc',

                   help=('Use Network Simulation Cradle, given by the indicated path,'

                         ' to allow the use of real-world network stacks'),

                   default='', dest='with_nsc')

def configure(conf):

    conf.env['ENABLE_NSC'] = False

    # checks for flex and bison, which is needed to build NSCs globaliser

    # TODO: how to move these checks into the allinone scripts?

    #def check_nsc_buildutils():

    #    import flex

    #    import bison

    #    conf.check_tool('flex bison')

    #    conf.check(lib='fl', mandatory=True)

    # Check for the location of NSC

    if Options.options.with_nsc:

        if os.path.isdir(Options.options.with_nsc):

            conf.check_message("NSC location", '', True, ("%s (given)" % Options.options.with_nsc))

            conf.env['WITH_NSC'] = os.path.abspath(Options.options.with_nsc)

    else:

        nsc_dir = os.path.join('..', "nsc")

        if os.path.isdir(nsc_dir):

            conf.check_message("NSC location", '', True, ("%s (guessed)" % nsc_dir))

            conf.env['WITH_NSC'] = os.path.abspath(nsc_dir)

        del nsc_dir

    if not conf.env['WITH_NSC']:

        conf.check_message("NSC location", '', False)

        conf.report_optional_feature("nsc", "Network Simulation Cradle", False,

                                     "NSC not found (see option --with-nsc)")

	return

    if sys.platform in ['linux2']:

        arch = os.uname()[4]

    else:

        arch = None

    ok = False

    if arch == 'x86_64' or arch == 'i686' or arch == 'i586' or arch == 'i486' or arch == 'i386':

        conf.env['NSC_ENABLED'] = 'yes'

        conf.env.append_value('CXXDEFINES', 'NETWORK_SIMULATION_CRADLE')

        conf.check(mandatory=True, lib='dl', define_name='HAVE_DL', uselib='DL')

        ok = True

    conf.check_message('NSC supported architecture', arch, ok)

    conf.report_optional_feature("nsc", "Network Simulation Cradle", ok,

                                 "architecture %r not supported" % arch)

    # append the NSC kernel dirs to the module path so that these dirs

    # will end up in the LD_LIBRARY_PATH, thus allowing the NSC NS-3

    # module to find the necessary NSC shared libraries.

    for nsc_module in ['linux-2.6.18', 'linux-2.6.26']:

        conf.env.append_value('NS3_MODULE_PATH',

                              os.path.abspath(os.path.join(conf.env['WITH_NSC'], nsc_module)))

def build(bld):

    obj = bld.create_ns3_module('internet-stack', ['node'])

    obj.source = [

        'tcp-test.cc',

        'udp-test.cc',

        'ipv4-test.cc',

        'ipv4-l4-protocol.cc',

        'udp-header.cc',

        'tcp-header.cc',

        'ipv4-interface.cc',

        'ipv4-l3-protocol.cc',

        'ipv4-end-point.cc',

        'udp-l4-protocol.cc',

        'tcp-l4-protocol.cc',

        'arp-header.cc',

        'arp-cache.cc',

        'arp-l3-protocol.cc',

        'udp-socket-impl.cc',

        'tcp-socket-impl.cc',

        'ipv4-end-point-demux.cc',

        'udp-socket-factory-impl.cc',

        'tcp-socket-factory-impl.cc',

        'pending-data.cc',

        'sequence-number.cc',

        'rtt-estimator.cc',

        'ipv4-raw-socket-factory-impl.cc',

        'ipv4-raw-socket-impl.cc',

        'icmpv4.cc',

        'icmpv4-l4-protocol.cc',

        'loopback-net-device.cc',

        ]

    headers = bld.new_task_gen('ns3header')

    headers.module = 'internet-stack'

    headers.source = [

        'udp-header.h',

        'tcp-header.h',

        'sequence-number.h',

        'icmpv4.h',

        'ipv4-interface.h',

        'ipv4-l3-protocol.h',

        ]

    if bld.env['NSC_ENABLED']:

        obj.source.append ('nsc-tcp-socket-impl.cc')

        obj.source.append ('nsc-tcp-l4-protocol.cc')

        obj.source.append ('nsc-tcp-socket-factory-impl.cc')

        obj.uselib = 'DL'