socket operation on non socket

communication Service side Import Socket # Initializes a socket sock = Socket.socket (socket.af_inet, socket. SOCK_STREAM) # SET SOCKET reusable sock.setsockopt (socket. Sol_socket, SOCKET. SO_REUSEADDR, 1) # bind

addresses can be written here and only ip addresses can be written here. If I write localhost, it will be wrong. 3. Obtain the connection result. If the connection is successful, we can continue to do what we want to do. If the connection fails, we will do what we will do later. 4. Disable socket socket_close () PHP socket request example: Error_reporting (E_ALL );Echo "/* Obtain the website server port */

Socket_shutdown () This function allows you to close a read, write, or specified socket Socket_strerror () Returns a detailed error for the specified error number Socket_write () Write data to the socket cache Socket_writev () Write data to a scatter/aggregate array Note:The Socket_read function will always read the shell data until the

exceptionDup () -- return a new socket object identical to the current one [*]Fileno () -- return underlying file descriptorGetpeername () -- return remote address [*]Getsockname () -- return local addressGetsockopt (level, optname [, buflen]) -- get socket optionsGettimeout () -- return timeout or NoneListen (n) -- start listening for incoming connectionsMakefi

socket is not connected and (when a sendto call sends a datagram socket, the request for sending or receiving data is not accepted. I created two files xx. php that are executed on the server. X. php is a file executed on the client. Xx. php // Set some basic variablesGlobal $ lat, $ lnt;$ Host = "192.168.1.110 ";$ Port = 8080;// Set the timeout valueSet_time_limit (0 );// Create a

socket fd duplicated from fileno () -- return underlying file descriptor getpeername () -- return remote address [*] getsockname () -- return local address getsockopt (level, optname [, buflen]) -- get socket options gettimeout () -- return timeout or None listen ([n]) -- start listening for incoming connections recv (buflen [, flags]) -- receive data accepts da

not use wsaevent ................../* If (bytestransferred = 0 (periodata-> operationtype = recv_posted| Periodata-> operationtype = send_posted )){Cout Closesocket (perhandledata. Socket );Globalfree (perhandledata );Continue;}*/ Eventarray [totalevent] = wsacreateevent ();Zeromemory ( periodata. overlapped, sizeof (overlapped ));Periodata. wsabuffer. Buf = buffer;Periodata. wsabuffer. Len = 2048;Periodata. overlapped. hevent = eventarray [totaleve

(SOCKFD, (struct sockaddr *) remote_addr, sin_size)) = = = 1) {Perror ("Accept error");Continue}printf ("received a connection from%s/n", Inet_ntoa (REMOTE_ADDR.SIN_ADDR));if (!fork ()) {/* Child Process Code Snippet * *if (Send (CLIENT_FD, "Hello, you are connected!/n", 26, 0) = = 1)Perror ("Send error.) ");Close (CLIENT_FD);Exit (0);}Close (CLIENT_FD);}}}The server workflow is this: first invoke the

("Connect Error! ");Exit (1);}if ((Recvbytes=recv (SOCKFD, buf, maxdatasize, 0)) ==-1) {Perror ("Recv Error! ");Exit (1);}Buf[recvbytes] = "n";printf ("Received:%s", buf);Close (SOCKFD);}The client program first obtains the server IP address through the server domain name, then creates a socket, calls the Connect function to establish the connection with the server, receives the data sent from the server a

, always receive message/private void CreateMessage () {try {System.out.println ("Wait for user access:"); Use Accept () to block waiting for a client to request a socket socket = server.accept (); SYSTEM.OUT.PRINTLN ("User access:" + socket.getport ()); Open a child thread to wait for another socket to join new thread (new Runnable () {public void run () {Create

program will always block at the receive () method, which is certainly not possible for the client, in order to avoid this problem, We use the Datagramsocket class's Setsotimeout () method on the client to develop the maximum blocking time for the receive () method and specify the number of times the datagram will be re-sent, and if each block times out and the number of postbacks reaches the set limit, the client is shut down.6. The UDP server uses the same

. You should test them first, if the connection is still unavailable, send the exception information.In addition, the Socket connection is prone to problems:1) The server cannot be started due to a port conflict;2) the IP address is incorrect. The IP address is divided into the local address, lan address, and Wan address. Test the IP address in different environments. If the IP address is incorrect, it cannot be accessed by the client, in addition, pr

("socket connect failed!"); } $buffer =@socket_read($socket,9, PHP_NORMAL_READ); $crcCode =(ord($buffer[7]) $len = strlen($packet); $newpacket = CRC16::encode($packet, $crcCode,4); socket_send ( $socket, $newpacket, $len,0); // Wait for acceptance $head =@socket_read($socket,4,PHP_NORMAL_READ); $len =(o

= Socket_accept ($socket);if ($connection){Socket_write ($connection, "you have connected to the socket.../n/r");}?> You should use your command prompt to run this example. The reason is that this will produce a server instead of a Web page. If you try to run the script using a Web browser, chances are that it will exceed the 30-second limit. You can use the fol

Socket Error Summary (EXT) comes from:http://hi.baidu.com/oxbat/blog/item/fbd4de95e4772548d0135e7a.html Socket Error 0-directly send errorSocket Error 10004-interrupted function callSocket Error 10013-permission deniedSocket Error 10014-bad AddressSocket Error 10022-invalid argumentSocket error 10024-too many open filesSocket Error 10035-resource temporarily unavailableSocket error 10036-operation now in pr

If a problem occurs, log If an error occurs when you call the connect socket accept function, perror ("socket"); perror ("Connect"); printf ("% s \ n", strerror (errno )); can make specific errors The select function emphasizes again: Socket operation on Non-socket errors m

() function. 2. synchronous sending function public int SynSend (string msg)Public int SynSend (string msg) {Socket socket = this. socket; byte [] data = Encoding. UTF8.GetBytes (msg); try {int sendLength = socket. send (data); Console. writeLine ("SynSend {0} bytes to server: {1} successfully", sendLength,

recipient's address * wait_seconds: Waiting For timeout seconds. If it is 0, it indicates normal mode * succeeded (not timed out) 0 is returned,-1 is returned for failure,-1 is returned for timeout, and errno = ETIMEDOUT */int connect_timeout (int fd, struct sockaddr_in * addr, unsigned int wait_seconds) {int ret; socklen_t addrlen = sizeof (struct sockaddr_in); if (wait_seconds> 0) activate_nonblock (fd); ret = connect (fd, (struct sockaddr *) addr, addrlen ); if (ret Test read_timeout int

the tag value as writemultibyte () As a character set. For example, the following code sends a Unicode-encoded string: Socket. writemultibyte ("example", "Unicode "); The method for passing a value to a socket object relies entirely on the types of all your data and the types of data accepted by the Service. Using a socket object, you can useWrite a telnet and p

The related code is as follows: $ socketsocket_create (AF_INET, SOCK_STREAM, $ commonProtocol) ordie ( quot; cannotcreatesocketn quot;); bind the socket to the port $ resultsocket_bind ($ socket, $ host, $ port) ordie ( quot; cannotbindporttosocketn quot;); start to listen to this port $ resultsocket_listen ($ so socketphp The related code is as follows: $ socket