Socket programming sockets Windows Platform C language implementation

"Compiling environment": Visual Studio 2013

#include <stdio.h> #include <stdlib.h> #include <winsock2.h> #pragma comment (lib, "Ws2_32.lib") const int back_log = 5;int main (int argc, char * argv[]) {//Initialize socket wsadata wsadata;int ret = WSAStartup (Makeword (2, 4), &wsada TA); if (0! = ret) {fputs ("WSAStartup error\n", stderr); return 1;} Create socket Socket sock = socket (af_inet, Sock_stream, ipproto_tcp), if (Invalid_socket = = sock) {fputs ("socket () error\n", STD ERR); WSACleanup (); return 1;} Bind socket sockaddr_in sockaddr;memset (&sockaddr,0,sizeof (sockaddr_in)); sockaddr.sin_family = af_inet;//protocol cluster, general use AF _inet represents the TCP/IP protocol sockaddr.sin_addr. S_un. S_ADDR = htonl (addr_any);//indicates IP address Sockaddr.sin_port = htons (7);//indicates port ret = bind (sock, (sockaddr*) &sockaddr, sizeof ( SOCKADDR)), if (socket_error = = ret) {fputs ("bind () error\n", stderr); closesocket (sock); WSACleanup (); return 1;} Listen SOCKET RET = Listen (sock, Back_log), if (socket_error = = ret) {fputs ("Listen () error\n", stderr); closesocket (sock); WSACleanup (); return 1;} Receive socket sockaddr_in Clientaddr;int SZclientaddr = sizeof (CLIENTADDR); SOCKET Clientsock = Accept (sock, (sockaddr*) &clientaddr, &szclientaddr); if (Invalid_socket = = Clientsock) { Fputs ("Accept () error\n", stderr); closesocket (sock); WSACleanup (); return 1;} Send and receive Data Tchar Buff[256];memset (&buff,0,sizeof (Buff)); recv (Buff), 0); Sock,buff,sizeof () returns the number of bytes read in//RECV Buff2[] = "quit\n"; Send (sock, buff2, sizeof (BUFF2), 0);//Success returns the number of characters actually transferred//recycle resource closesocket (sock); Closesocket ( Clientsock); WSACleanup (); return 0;}

Socket programming sockets Windows Platform C language implementation