Programmer Think

This is Niuke Linux C + + course and dark horse Linux system programming notes. 1. Network byte order We already know that multi byte data in memory can be divided into large end and small end relative to memory address. The multi byte data in the disk file can also be divided into large end and small end relative to the offset address in th ...

In the previous section, we talked about the calling process of Socket in TCP and UDP scenarios. In this section, we will follow this process to the kernel to find out what data structures have been created and what things have been done in the kernel. Parsing socket function Let's start with the Socket system call. SYSCALL_DEFINE3(socket, i ...

Introduction *: tcp is a protocol of network communication. For programmers, the protocol is to write a program according to the agreed protocol. For specific coding, compared with the previous demo of socket communication, socket communication will not use a new API, but add corresponding information to the header of the sent message according ...

Network programming is a program running on different computers under the network communication protocol, which can transmit data   Three elements of network programming IP address         The identification number of the computer, that is, the device identification. The IP address of each computer is different, ...

1. Introduction Select is still important in Socket programming, but for beginners of Socket, they don't like to write programs with select. They are just used to writing blocking programs such as connect, accept, recv or recvfrom (the so-called blocking method block, as the name suggests, means that a process or thread must wait for an ev ...

Review of the previous section: We send data from the application layer to senders and receivers in different buildings. The transport layer has two protocols: TCP / UDP TCP / UDP can be seen as a parallel universe, without interruption. Receiver and sender can use TCP / UDP Each port of the server is isolated from each other. Understand TCP as ...

Chapter 1 enterprise level shared file system 1.1 vsftp 1.1.1 overview of vsftp 1. Introduction FTP (File Transfer Protocol) is one of the protocols in the TCP/IP protocol group. Used for two-way transfer of files on the Internet. When using FTP to transmit, it is dangerous to a certain extent, because the data is completely unprotected pla ...