// nsclick-wifi-single-interface.click
//
// Copyright (c) 2011, Deutsche Telekom Laboratories
//
// 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, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
//
// Author: Ruben Merz <ruben@net.t-labs.tu-berlin.de>
//
// This is a single host Click configuration for wifi.
// The node broadcasts ARP requests if it wants to find a destination
// address, and it responds to ARP requests made for it.
elementclass WiFiSimHost {
$ipaddr, $hwaddr |
cl::Classifier(12/0806 20/0001,12/0806 20/0002, -);
forhost::IPClassifier(dst host $ipaddr,-);
arpquerier::ARPQuerier(eth0);
arpresponder::ARPResponder(eth0);
ethout::Queue
-> ToDump(out_eth0.pcap,PER_NODE 1)
-> ToSimDevice(eth0);
// All packets received on eth0 are silently
// dropped if they are destined for another location
FromSimDevice(eth0, SNAPLEN 4096)
-> RadiotapDecap ()
-> PrintWifi (MonitorNodeClick)
-> ToDump(in_eth0.pcap,PER_NODE 1,ENCAP 802_11)
-> WifiDecap ()
-> cl;
// ARP queries from other nodes go to the ARP responder element
cl[0] -> arpresponder;
// ARP responses go to our ARP query element
cl[1] -> [1]arpquerier;
// All other packets get checked whether they are meant for us
cl[2]
-> Strip (14)
-> CheckIPHeader2
-> MarkIPHeader
-> GetIPAddress(16) // Sets destination IP address annotation from packet data
-> forhost;
// Packets for us are pushed outside
forhost[0]
->[0]output;
// Packets for other folks or broadcast packets get sent to output 1
forhost[1]
-> ToDump(discard.pcap,2000,PER_NODE 1,ENCAP IP)
-> [1]output;
// Incoming packets get pushed into the ARP query module
input[0]
-> arpquerier;
// Both the ARP query and response modules send data out to
// the simulated network device, eth0.
arpquerier
-> ToDump(out_arpquery.pcap,PER_NODE 1)
-> ethout;
arpresponder
-> ToDump(out_arprespond.pcap,PER_NODE 1)
-> ethout;
}
elementclass TapSimHost {
$dev |
// Packets go to "tap0" which sends them to the kernel
input[0]
-> ToDump(tokernel.pcap,2000,IP,PER_NODE 1)
-> ToSimDevice($dev,IP);
// Packets sent out by the "kernel" get pushed outside
FromSimDevice($dev, SNAPLEN 4096)
-> CheckIPHeader2
-> ToDump(fromkernel.pcap,2000,IP,PER_NODE 1)
-> GetIPAddress(16)
-> [0]output;
}
// Instantiate elements
wifi::WiFiSimHost(eth0:ip,eth0:eth);
kernel::TapSimHost(tap0);
// Users can do some processing between the two elements
wifi[0] -> kernel;
kernel -> wifi;
// Packets not for us are discarded
wifi[1] -> Discard;
// It is mandatory to use an IPRouteTable element with ns-3-click
// (but we do not use it in this example)
rt :: LinearIPLookup (172.16.1.0/24 0.0.0.0 1);
// We are actually not using the routing table
Idle () -> rt;
rt[0] -> Discard;
rt[1] -> Discard;