The interactive application of POX libraries and embedded devices

The interactive application of POX class library and embedded equipment In recent years, with the rapid development of IoT technology, the application of embedded equipment has become more and more widely used.As a lightweight Python open source controller, the POX class library can help embedded devices to achieve higher -level functions and interaction in the Internet of Things environment. POX is written in Python language. It is an open source control framework based on the OpenFlow protocol.Embedded devices usually have limited computing and storage capabilities, and POX, as a lightweight controller, can be operated on these limited resources and provides flexible control of the Internet of Things environment. Below we will introduce some examples of the interactive application of POX libraries and embedded equipment.Please note that we will provide relevant coding and configuration descriptions. 1. Control network traffic of embedded equipment: POX class libraries can communicate with embedded devices through the OpenFlow protocol to send network traffic control strategies to the device.To achieve this function, you need to write the corresponding code on the POX controller.The following is a simple example: python from pox.core import core import pox.openflow.libopenflow_01 as of class TrafficController(object): def __init__(self): core.openflow.addListeners(self) def _handle_ConnectionUp(self, event): # Get the connection with the device connection = event.connection # Create a flow table item, limit the width of 10Mbps from the host H1 to the host H2 match = of.ofp_match() match.dl_type = 0x800 match.nw_src = '10.0.0.1 ' # The IP address of the host H1 match.nw_dst = '10.0.0.2 ' # The IP address of the host H2 Action = OF.OFP_ACTION_OUTPUT (port = 2) # output port is 2, that is, connect to the port of the host H2 flow_mod = of.ofp_flow_mod() flow_mod.match = match flow_mod.actions.append(action) connection.send(flow_mod) def launch(): core.registerNew(TrafficController) In the above code, the `trafficController` class inherits the basic class of POX, and registered the OpenFlow event processing function.In the `_handle_connectionup` function, we created a flow table item and set the matching conditions to the IP traffic from the host H1 to the host H2.Then send the flow meter to the device. 2. Monitor the network traffic of embedded equipment: POX class libraries can also be used to monitor network traffic of embedded devices, thereby achieving functions such as traffic analysis and security auditing.The following is a simple example: python from pox.core import core from pox.lib.packet.ethernet import ethernet from pox.lib.packet.ipv4 import ipv4 def _handle_PacketIn(self, event): packet = event.parsed # Check whether the data package is an IPv4 packet if packet.type == ethernet.IP_TYPE: ipv4_packet = packet.payload src_ip = ipv4_packet.srcip dst_ip = ipv4_packet.dstip # 地址 ip address and destination IP address Print (f "source IP address: {src_ip}, destination IP address: {dst_ip}") def launch(): core.openflow.addListenerByName("PacketIn", _handle_PacketIn) In the above code, `_handle_packetin` function is used to process the received data packets, extract the source IP address and destination IP address of the IPv4 packet, and then print it out.In this way, real -time monitoring of network traffic of embedded devices can be achieved. It should be noted that the above code is only an example. In practical applications, appropriate modification and configuration may need to be appropriately modified according to the specific embedded equipment and network environment. In summary, the interactive application of POX libraries and embedded devices is very wide.Through the POX class library, we can realize the network traffic control, monitoring and analysis of embedded devices, which improves the flexibility and scalability of embedded devices in the Internet of Things environment.