socket programming in c

efficient than TCP/IP communication, the specified soket file path must be consistent with the setting in [mysqld] [mysqld] port = 3306 socket =/tmp/mysql. sockskip-external-locking # disable external-locking. See the description of external-locking: Use system (external) locking (disabled by default ). with this option enabled you can run myisamchk to test not repair) tableswhile the MySQL server is running. disable with -- skip-external-locking.key

ParametersOut. print (params );// Flush the buffer of the output streamOut. flush ();// Define the BufferedReader input stream to read the URL responseIn = new BufferedReader (New InputStreamReader (conn. getInputStream ()));String line;While (line = in. readLine ())! = Null){Result + = "\ n" + line;}}Catch (Exception e){System. out. println ("an exception occurred when sending the POST request! "+ E );E. printStackTrace ();} As mentioned above, get requests only require conn. conn must be set

Event. h/event. c Event Critsect. c CRITICAL_SECTION Wait. c Networking Soket Communication Mechanism Asynchronous Communication: Async. cException SEH-Structure ubuntuin HandlerCRT (C Runtime) Code name Function File. c Operations on files, basic operations on files in C Language Finite. h Support for floating point numbers, infinity, and infinity Lstr Some b

disabled Soket. 3. Custom errors. These errors are triggered by the user in the application code. 4. assertion errors. When the Code violates the legal logicassertModule trigger 2. JavaScript errors and system errors 2.1 JavaScript errors and custom errors Standard JavaScript errors are provided by the JavaScript language, indicating syntax errors or improper use of APIs. All errors areErrorClass instances, and standard JavaScript errors are built by

Follow these steps to create a TCP link: 1. The server must be prepared to accept external links by calling soket, bind, and listen systems. This is called passive open.2. the client actively opens the connection by calling connect. This causes the client TCP to send a SYN (synchronization) Subsection, which tells the Server Client the initial serial number of the data to be sent in the connection to be established, for example, Syn J indicates that

There are many socket functions in windows. I have not introduced them in detail. The functions here are a brief description of their usage. For detailed usage, refer to msdn.The main purpose here is to serve the following three application services. Function Description:--------- Wsastartup FunctionInitialize Winsock[Statement]Int wsastarup (word wversionrequested, lpwsadata lpwsaData );[Parameters]Wversionrequested-the minimum version number of Winsock is required.Lpwsadata-Winsock details

Subject: Analysis: setsockopt () improves program robustnessAuthor: gdy119 (evening breeze) I am sorry for the constant thanks from coolmei25 (Mei Sheng). belowI have written some of my experiences in network programming and hope to help him (^_^:1. If the socket is already in the established State (usually distinguished by the port number and flag ),Closesocket (usually does not close immediately and goes through the time_wait process) and wants to continue to reuse the socket:Bool breuseaddr =

Analysis: setsockopt () 1. IfAfter the socket in the established State (usually distinguished by the port number and the flag) calls closesocket (usually it will not be immediately closed but will go through the time_wait process), you want to continue to reuse the socket: Bool breuseaddr = true; Setsockopt (S, sol_socket, so_reuseaddr, (constChar *) breuseaddr, sizeof (bool )); 2.If you want to force close a soket that is already in the connection s

--------------------------------------------------------------------------Ip_hdrincl contains the IP header int in the data package.This option is often used by hackers to hide their IP addresses. Ip_optinos IP header option intIp_tos service typeIp_ttl time int The following IPv4 Option is used for MulticastIPv4 Option data type descriptionIp_add_membership struct ip_mreq add to multicast groupIp_rop_membership struct ip_mreq exit from multicast groupIp_multicast_if struct ip_mreq specifies the

support the so_broadcast option. sock_dgram APIs do not support the so_dontlinger, so_keepalive, so_linger, and so_oobinline options.Wsaenotconn: When so_keepalive is set, the connection is reset.Wsaenotsock: The description is not a set of interfaces.Usage1. After closesocket () is called, the socket can be reused. Calling closesocket () usually does not immediately close the socket, but goes through the time_wait process.Bool breuseaddr = true;Setsockopt (S, sol_socket, so_reuseaddr, (const c

: Group data types (arrays, collections, etc.) Package String Management Date and time management RAW Data Block Management Preference Management URL and Data flow operations Threading and Runloop Port and Soket Communication The Core Foundation framework is closely related to the foundation framework, which provides interfaces for the same functionality, but the foundation framework provides the OBJECTIVE

(i) Client/server architecture1. What is the client/server used for?The client makes a request to the server, and the server receives the request to service the client.Server has two forms, a software server pattern, such as (Web server), the client sends the request to the server, the server receives the request, provides the information on the webpage for its service.Another is the hardware server form, such as (printer, USB stick), to provide services to the client.Both the client and the ser

ThreadingtcpserverThe Soket server implemented by Threadingtcpserver creates a " thread " For each client that is used to interact with the client.1. Threadingtcpserver FoundationUsing Threadingtcpserver: Create a class that inherits from Socketserver.baserequesthandler A method called handle must be defined in a class Start Threadingtcpserver #!/usr/bin/env python#-*-coding:utf-8-*-ImportSocketserverclassMyServer (socketserver.b

This article goes to: http://www.qingpingshan.com/rjbc/ios/157477.htmlIntroductionThe Core Foundation Framework (corefoundation.framework) is a set of C-language interfaces that provide basic data management and service capabilities for iOS applications. The following lists the data that the framework supports for management and what services are available:1. Group data types (arrays, collections, etc.)2. Package3. String Management4. Date and Time management5. Raw Data Block Management6. Prefer

pipe I/O) pipe (build pipeline) Popen (establish pipeline I/O)(+) soket correlation functionAccept (socket connection) bind (socket) connect (establish socket) endprotoent (end of Read of network protocol data) Endservent (end reading of network service data) GETHOSTBYADDR (acquisition of network data by IP address) gethostbyname (acquisition of network data by host name) Getprotobyname (acquisition of protocol data by network protocol name) Getproto

pipe I/O) pipe (build pipeline) Popen (establish pipeline I/O)(+) soket correlation functionAccept (socket connection) bind (socket) connect (establish socket) endprotoent (end of Read of network protocol data) Endservent (end reading of network service data) GETHOSTBYADDR (acquisition of network data by IP address) gethostbyname (acquisition of network data by host name) Getprotobyname (acquisition of protocol data by network protocol name) Getproto

socket? What happens when a sticky bag occurs?Socket sticky pack:???? When the socket interacts with send, a sticky packet will appear when multiple sends are processed consecutively, and Soket will force two send as a send, sticking together.?? Send sends a fixed value based on the value defined by the recv, and if the last time the remaining value is less than the RECV definition, it will be sent with two send data simultaneously, and the sticky pa

by the signal.5, Eagain This action will cause the process to block, but the soket of the parameter S for the missed lesson block.6, ENOBUFS system buffer memory is insufficient.7, EINVAL passed to the system call parameter is not correct.Example#include #include #include #include #define PORT 2345/* Used by Port */Main (){int SOCKFD, Len;struct sockaddr_in addr;Char buffer[256];Creating socketsif (SOCKFD = socket (af_inet, SOCK_DGRAM, 0)) {Perror ("

connection, add the socket to the descriptor RfB so that the socket can be tested. A descriptor can be added under multiple sockets to execute the SELECT function, making a query for ret = SELECT (0, 0, rfd, 0, timeout), if (retSockaddr_in addrself; // Local address addrSelf.sin_addr.s_addr = inet_addr ("192.168.1.110"); Specify the address of the NIC addrself.sin_family =Addrself.sin_port = htons (20000); if (-1 = = bind (Sockclient[i], (sockaddr*) addrself,sizeof (SOCKADDR)))// Forcibly

breuseaddr=true;SetSockOpt (S,sol_socket, SO_REUSEADDR, (const char*) breuseaddr,sizeof (BOOL));2. If the soket that is already in the connection state is forced to close after calling Closesocket, do not experience the TIME_WAIT process:BOOL Bdontlinger = FALSE;SetSockOpt (S,sol_socket,so_dontlinger, (const char*) bdontlinger,sizeof (BOOL));3. In the process of sending (), the recv () is sometimes due to network conditions and other reasons, the del