WinSocket Communication Test

First, the WinSocket uses the TCP protocol to complete the communication

Programs for ① servers

SocketSever.cpp: Defines the entry point of the console application. #include "stdafx.h" #include <Winsock2.h> #include <stdio.h> #include <stdlib.h> #pragma comment (     LIB, "Ws2_32.lib") #if dubug #define AF_INET 2/* internetwork:udp, TCP, etc. */#define Sock_stream        1/* Stream socket */#define SOCK_DGRAM 2/* Datagram Socket */#define Sock_raw 3/* Raw-protocol interface */#define SOCK_RDM 4/* reliably-delivered message */#def INE Sock_seqpacket 5/* Sequenced Packet stream *//** Socket address, Internet style.*/struct sockaddr_in { Short Sin_family;u_short sin_port;struct in_addr sin_addr;char sin_zero[8];}; typedef struct SOCKADDR_IN sockaddr_in; /* Microsoft Windows Extended data Types */int bind (SOCKET s,const struct sockaddr FAR * name,int namelen);/* Incl_winsock _api_prototypes*/int Listen (SOCKET s,int backlog), #endif #define Port 3578#define MaxSize 1024sockaddr_in addrsrv; SockaDdr_in addrclient; SOCKET socksrv; Server Socket sockconn;//**************************************************************************************** * * Function Name * * STARTSOCK ()//** input * * No//** output * * No//** function Description * * Load socket//************************************ /int Socketinit () {WORD wversionrequested; Wsadata wsadata;int Err;wversionrequested=makeword (2,2); err = WSAStartup (wversionrequested,&wsadata); Returns 0, succeeds, otherwise the error code if (err!=0) {printf ("The WinSock DLL version is not required n"); return 0;} if (Lobyte (wsadata.wversion)!=2| | Hibyte (wsadata.wversion)!=2) {wsacleanup (); return 0;} return 1;}  //********************************************************************************************************///** Function Name * * Main ()//** input * * No//** output * * No//** function Description * * Main function//**************************************************************** /int Main () {if (Socket_error ==socketinit ()) {return-1;} Sockaddr_in addrsrv;//DepositAddrsrv.sin_addr to place local address information. S_un. S_addr=htonl (inaddr_any);//htol converts host byte-order long to network byte order addrsrv.sin_family=af_inet;addrsrv.sin_port=htons (6001);// Htos is used to convert the port into characters, more than 1024 of the number can//real socket Programming part socket Socksrv=socket (af_inet,sock_stream,0);//connection-oriented reliability service Sock_strambind (Socksrv, (sockaddr*) &addrsrv,sizeof (sockaddr));//Bind the socket to the corresponding address and port listen (socksrv,5);//The maximum length in the wait queue is 5printf ( "%s\n", "Welcome,the Host is running! Now wating for someone comes in! "); sockaddr_in addrclient;int isend = 0;char Sendbuf[maxsize];char revbuf[maxsize];int len=sizeof (SOCKADDR); while (1)// Loop listener client, never stop {sockconn=accept (socksrv, (sockaddr*) &addrclient,&len);//block the calling process until a new connection occurs if (Sockconn = = Invalid_socket) {printf ("Accept failed!\n"); return-1;} sprintf (SendBuf, "Server IP is:%s", Inet_ntoa (ADDRCLIENT.SIN_ADDR));//inet_nota function is converting characters to IP address isend = Send (Sockconn, Sendbuf,strlen (SENDBUF) +1,0);//The server sends data to the client if (isend = = socket_error) {printf ("Send failed!"); break;} Char recvbuf[100];recv (sockconn,recvbuf,100,0);//server accepts data from client printf ("%s\n", RECVBUF); clOsesocket (sockconn);//Close Socket}closesocket (sockconn); Close socket GetChar (); return 0;}

② Client-side programs

<pre name= "code" class= "CPP" > #include "stdafx.h" #include <Winsock2.h> #include <stdio.h> #include <string.h> #pragma comment (lib, "Ws2_32.lib")//************************************************************ * * Function Name * * STARTSOCK ()//** input * * No//** output * * No//** function Description * * Load socket//******** /int Socketinit () {WORD wversionrequested; Wsadata wsadata;int Err;wversionrequested=makeword (2,2); err = WSAStartup (wversionrequested,&wsadata); Returns 0, succeeds, otherwise the error code if (err!=0) {printf ("The WinSock DLL version is not required n"); return 0;} if (Lobyte (wsadata.wversion)!=2| | Hibyte (wsadata.wversion)!=2) {wsacleanup (); return 0;} return 1;}  //********************************************************************************************************///** Function Name * * Main ()//** input * * No//** output * * No//** function Description * * Main function//**************************************************************** ***************/int Main () {//fixed format char recvbuf[1024];if (Socket_error ==socketinit ()) {return-1;}    Establish communication socket Socket Sockclient=socket (af_inet,sock_stream,0);    Sockaddr_in addrsrv; Addrsrv.sin_addr. S_un.    S_ADDR=INET_ADDR ("192.168.1.100");//Set the IP address of the server to be connected addrsrv.sin_family=af_inet; Addrsrv.sin_port=htons (6001);//Set the port address of the server that needs to connect to connect (sockclient, (sockaddr*) &addrsrv,sizeof (sockaddr));//    Connect with the server//receive information from the teacher int irevlen = 0; Irevlen = recv (Sockclient,recvbuf,strlen (RECVBUF) +1,0); if (0 = = Irevlen) {return-1;} else if (socket_error = = Irevlen) {printf ("Recv failed\n!");    return-1;}    printf ("%s\n", recvbuf); char str[100];gets (str);    Send (Sockclient,str,strlen (str) +1,0); closesocket (sockclient); WSACleanup (); GetChar (); return-1;}

WinSocket Communication Test