A. SocketTCP is a connection-based protocol, so you must start the server before you use the client to connect to the server.UDP is not a connection-oriented protocol, so after starting the server, you do not need to establish a connection with the
PHP socket programming is more difficult to understand, but we just understand the socket of the relationship between several functions, as well as the role they play, then it should not be difficult to understand, in my opinion, socket programming,
What is a socket? A socket is an intermediate software abstraction layer that the application layer communicates with the TCP/IP protocol family, which is a set of interfaces. In the design mode, thesocket is actually a façade mode, it is the
The LUA language is too powerful, at least that's how I feel. The original LUA does not have a socket function and requires the user to download the LUA socket component for a require. and the Lua-nginx module with the socket function, and is 100%
It is important to realize that clients and servers be processes and not ma-chines, or the hosts as they are often Called in this context.Data received from the network are copied from the adapter across the I/O and memory buses into memor Y,
The introduction of--socket is to solve the problem of interprocess communication between different computers
1.socket Relationship to the process
1. The relationship between the socket and the process: the socket is used to exchange information
This two days simply looked at the next C + + socket communication, said socket communication, we have to mention the TCP/IP protocol, this agreement is famous, I want to see the programming at least heard. In the TCP/IP protocol, the most common is
ICMP protocol
ICMP (Internet Control Message protocol,internet) is a connectionless protocol that is a child protocol of the TCP/IP protocol family and belongs to the Network layer protocol for IP host, Transfer control messages between routers
A simple example of a Linux Java program communicating with a C language program through a socketthis morning, I experimented with a Java program communicating with a C language program through a socket. Because did not learn Java, so just write the
One, the address structure of the socket.The IPV4 socket address structure is also commonly referred to as the "internetwork socket address Structure", which is sockaddr_inNamed POSIX is defined as follows:#include structin_addr{unsignedLongS_ADDR;/*
Socket Basicsc/S architecture, that is, client/server architecture, B/S Architecture (Browser/server), also belongs to C/s architectureSocket INTRODUCTIONSocket socket is to complete the development of C/s architecture software. The socket relies on
This article mainly introduces the use of Lua-nginx in openresty to create a socket instance, this article directly gives code examples and running effects, need friends can refer to the following
The LUA language is too powerful, at least that's
Send function
int send (SOCKET s, const char FAR *buf, int len, int flags);
Both the client and the server application use the Send function to send data to the other end of the TCP connection.
The client typically sends a request to the server
1. Preliminary knowledge
has been rarely seen how many people use PHP socket module to do something, probably everyone positioning it in the context of scripting language, but in fact, PHP socket module can do a lot of things, including doing
From WIN2000 to win XP, and then to WIN2003, the increase in security for MS IIS servers is obvious. In WIN2000, a normal PHP shell can break it down; In Win XP, even if safe mode = off, you cannot execute system commands with functions such as
PHP socket programming is more difficult to understand things, but, as long as we understand the relationship between several functions of the socket, and the role they play, then it should not be difficult to understand, in my opinion, socket
In WIN2000, a normal PHP shell can break it down; In Win XP, even if safe mode = off, you cannot execute system commands with functions such as system (), but we can also use the COM () function to break through; to win 2003, even if both IIS and
The introduction of--socket is to solve the problem of interprocess communication between different computers
1.socket Relationship to the process
1. The relationship between the socket and the process: the socket is used to exchange information
Winsock Basic knowledge
It is not intended to systematically introduce socket or Winsock knowledge. First, we introduce the Winsock API function, explain the concept of blocking/non-blocking, then introduce the use of socket.
WinSock API
The
blocking Mode
Windows Sockets perform I/O operations in both blocking and non-blocking modes. In blocking mode, the action function that executes until the I/O operation is complete waits without immediate return, and the thread where the function
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