Cirrus Logic CS485 Manual de usuario descargar pdf (Pagina 51)

CS485G Spring 2015 51

11. Sample server for ”echo”

1 int server(int argc, char

argv) {

2 int listenfd, connfd, listenPort;

3 struct sockaddr_in clientAddr;

4 struct hostent

clientHostEntry;

5 char

clientIP;

6 unsigned short clientPort;

7 listenPort = atoi(argv[1]);

8 listenfd = open_listenfd(listenPort);

9 while (1) {

10 socklen_t addrLength = sizeof(clientAddr);

11 connfd = Accept(listenfd, (SA

)&clientAddr, &addrLength);

12 if (connfd < 1) perror("accept error");

13 // the following is optional to get info on the client

14 clientHostEntry = Gethostbyaddr(

15 (const char

)&clientAddr.sin_addr.s_addr,

16 sizeof(clientAddr.sin_addr.s_addr),

17 AF_INET);

18 clientIP = inet_ntoa(clientAddr.sin_addr);

19 // net-to-ASCII string in dotted notation

20 clientPort = ntohs(clientAddr.sin_port);

21 printf("server connected to %s (%s) on my new clientPort %u\n",

22 clientHostEntry->h_name, clientIP, clientPort);

23 // end of optional part

24 echo(connfd);

25 Close(connfd);

26 } // while(1)

27 } // server

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Cirrus Logic CS485 Manual de usuario Pagina 51