C Language Socket Network programming example

Service side:

1 #define_crt_secure_no_warnings2 3#include <stdio.h>4#include <winsock2.h>5 #pragmaComment (lib, "Ws2_32.lib")6 7 /*8 TCP Service Side9 */Ten intMainvoid) One { A     intLen =0; - wsadata WD; -     intRET =0; the SOCKET S, c; -     Charsendbuf[ +] ="", recvbuf[ +] =""; - sockaddr_in saddr, caddr; -ret = WSAStartup (Makeword (2,2), &AMP;WD);/*1. Initialize the Operation*/ +  -     if(Ret! =0) +     { A         return 0; at     } -     if(Hibyte (wd.wversion)! =2|| Lobyte (wd.wversion)! =2) -     { -printf"initialization failed"); - WSACleanup (); -         return 1; in     } -  to     /*2. Create a service-side socket*/ +s = socket (af_inet, Sock_stream,0); -  the     /*3. Set up service-side information*/ *Saddr.sin_addr. S_un. S_ADDR =htonl (inaddr_any); $saddr.sin_family = af_inet;/*protocol Type*/Panax NotoginsengSaddr.sin_port = htons (8888); -  the     /*4. Binding on the local port*/ +Bind (S, (SOCKADDR *) &saddr,sizeof(SOCKADDR)); A  the     /*5. Listening Port*/ +Listen (s),5); -  $Len =sizeof(sockaddr); $  -      while(1) -     { the         /*6. Wait for the client to connect, which will block here until a client connection arrives. */ -C = Accept (S, (sockaddr*) &caddr, &len);Wuyi  thesprintf (SendBuf,"Welcome to my first socket, your IP address is:%s\n", Inet_ntoa (CADDR.SIN_ADDR)); -  Wu         /*7. Sending data to the client*/ -Send (c, SendBuf, strlen (SENDBUF) +1,0); About  $         /*8. Accept the return of the client*/ -Recv (c, Recvbuf, +,0); -  -         /*9. Print out the data sent by the client*/ Aprintf"%s\n", recvbuf); +  the         /*10. If you are no longer contacting this client, close it*/ - closesocket (c); $     } the     /*If there is a condition to exit the loop, the use of the socket library needs to be cleared*/ the     /*WSACleanup ();*/ the     return 0; the}

Client:

1 #define_crt_secure_no_warnings2 3#include <stdio.h>4#include <winsock2.h>5 #pragmaComment (lib, "Ws2_32.lib")6 7 intMainvoid)8 {9 wsadata WD;Ten     intRET =0; One SOCKET C; A     Charrecvbuf[ +] ="", sendbuf[ +] =""; - sockaddr_in saddr; -ret = WSAStartup (Makeword (2,2), &AMP;WD);/*1. Initialize the Operation*/ the  -     if(Ret! =0) -     { -         return 0; +     } -  +     if(Hibyte (wd.wversion)! =2|| Lobyte (wd.wversion)! =2) A     { atprintf"initialization failed"); - WSACleanup (); -         return 1; -     } -  -     /*2. Create a client socket*/ inc = Socket (Af_inet, Sock_stream,0); -  to     /*3. Define the service-side information to be connected*/ +Saddr.sin_addr. S_un. S_ADDR = inet_addr ("127.0.0.1"); -saddr.sin_family =af_inet; theSaddr.sin_port = htons (8888); *  $     /*4. Connecting the service side*/Panax NotoginsengConnect (c, (sockaddr*) &saddr,sizeof(SOCKADDR)); -Recv (c, Recvbuf, +,0); theprintf"data sent from the server:%s\n", recvbuf); +  Asprintf (SendBuf,"Service side Hello!!! "); theSend (c, SendBuf, strlen (SENDBUF) +1,0); +  - closesocket (c); $ WSACleanup (); $  - GetChar (); -     return 0; the}

C Language Socket Network programming example