recvfrom windows

1 UDP Receive principleThe UDP receiving process of the operating system is as follows: After receiving a UDP packet, after verifying that there is no error, put in a package queue, each element in the queue is a complete UDP packet. When the

Both Recv and recvfrom are used to accept data from the network. Let's take a look at their prototype: 　 Int Recv (Socket{Function onclick (){Function onclick (){Showtip (this)}}} "> S,Char far*{Function onclick (){Function onclick (){Showtip (this)}

Phenomenon:On a Windows 7 system, a uses a UDP socket, which calls the SendTo function to send data to a destination address B, but the destination address B does not receive data, and if a immediately calls Recvfrom to attempt to receive the data

1) To prevent redefinition, the header file inclusion sequence in Windows code is as follows: # Include # Define win32_lean_and_mean# Include Reference: http://blog.sina.com.cn/s/blog_658d267b0100jb2l.html // ========================================

Source: http://www.vckbase.com/document/viewdoc? Id = 536 Windows Sockets network programming (iii) -- Windows Sockets 1.1 ProgrammingAuthor: Xiaoying, freezing point StudioI. IntroductionWindows Sockets is extended from Berkeley sockets.

Two Protocols TCP and UDPThe former can be understood as a guaranteed connection, and the latter is the pursuit of fast connections.Of course, the last point is a bit too absolute, but now do not have to boil too much, because the first socket

 Applications that use the TCP/IP protocol usually use two application programming interfaces (APIS): socket and TLI (Transport Layer ). The former is sometimes called "Berkeley socket", indicating that it has evolved from the Berkeley edition. The

Add Winsock2.h Error in Project1>c:\program files (x86) \ Windows Kits\8.1\include\shared\ws2def.h (+): Warning C4005: ' af_ipx ': Macro redefinition1> C:\Program Files (x86) \ Windows Kits\8.1\include\um\winsock.h (452): See previous definition of '

Here, the thread model refers to the thread model design related to Winsock. Some problems in the design process of this software involve Winsock. In order to design the thread model well, we must understand the internal working mechanism of socket.

1 Concept DescriptionBefore interpreting, there are a few concepts to be explained: User space and kernel space Process switching Blocking of processes File descriptor Cache IO 1.1 User space and kernel spaceNow that