Directory 1. Introduction to network card equipment 2. Write the virtual network card driver 2.1 Writing the init initial function ( vir_dev_register() ) 2.2 Write the contract sending function ( vir_dev_xmit() ) 2.3 Write the packet receiving function ( vir_dev_rcpacket() ) 3. Run the test 3.1 Compile and load 3.2 Network card startup and ip […]
Tag: etw
[08.QT network communication multithreading]
QT network communication multi-thread QThread thread creation method the code QThread thread creation method 1. Write a class that inherits the QThread class, rewrite the run() function, and generate an instance of ChildThread in the main thread, and call the start() function of the object Every time you create a new thread, you need to […]
[Network Technology] Firewall configuration stand-alone bypass mode
Networking requirements A company deploys an Agile Controller server group on the network, and at the same time deploys a FW at the network egress in a bypass mode, as shown in Figure 1. The requirements are: ?Different user roles can access different network resources (configured on the Agile Controller server). ? After the user […]
Linux: PXE efficient batch network installation
1. PXE Overview 1. The role of PXE A pre-boot execution environment, which runs before the operating system. 2. Advantages of PXE batch deployment (1) Scale: assemble multiple servers at the same time; (2) Automation: install the system and configure various services; (3) Remote implementation: no CD, U disk and other installation media are required. […]
[Network programming] Protocol customization + Json serialization and deserialization
Directory 1. The concept of serialization and deserialization 2. Design a network calculator with a custom protocol 2.1 TCP protocol, how to ensure that the receiver has received the complete message? 2.2 Implementation of custom protocol 2.3 Implementation of custom protocol in client and server 3. Use Json for serialization and deserialization 3.1 Installation of […]
Python calculates the distance between two points by latitude and longitude
Python calculates the distance between two points by latitude and longitude There are generally two methods for calculating the distance between two points by latitude and longitude, geodesic distance (assuming the earth is an ellipsoid) and great circle distance (assuming the earth is a sphere). The latter is slightly lower in accuracy than the former, […]
Campus Network Security Design–Core Layer
Campus Network Security Design – Core Layer Local defense against attacks Local attack defense is an important function set of the switch, which can protect the CPU, solve the problem of service interruption caused by the CPU processing a large number of packets normally sent to the CPU or malicious attack packets, and ensure that […]
tun/tap network device for network virtualization
As one of the underlying infrastructures of the edge virtual machine, the importance of the network is self-evident. It is responsible for the north-south and east-west traffic connectivity functions of the virtual machine instance, and the tun/tap device is the qemu that connects the internal and external networks of the vm. important virtual devices. This […]
[C++] What is the difference between a virtual table and a virtual base table?
Virtual table and virtual base table virtual table virtual base table Object model when both virtual inheritance and virtual functions exist Virtual table We know that if the method declared in the class is modified with virtual, it means that the current method should be used as a virtual function, and the storage of virtual […]
What is the difference between Collections.emptyMap() and new HashMap? Table comparison + source code
Small thoughts: Recently, my mood is more complicated, ε=(′ο｀*))), probably the time has come, coupled with the uncertainty of the future, the state has not been good; Seeing that many bigwigs have found summer internships, I am still here. First, I feel that the atmosphere is not bad (except for the Internet environment, there is […]