source: liacs/net/as3/src/echod/echod.c@ 422

/*  Netlab 2009 - group 1 - assignment 3

 *  Johan IJsveld

 *  Rick van der Zwet

 */

#include <sys/types.h>

#include <netdb.h>

#include <sysexits.h>

#include <stdio.h>

#include <string.h>

#include <unistd.h>



#include <sys/socket.h>

#include <netinet/ip.h> 

#include <netinet/tcp.h>



#define LISTEN_BACKLOG 0

#define BUF_SIZE 1000





#include <signal.h>





int main() {

  int conn_fd;

  char buf[BUF_SIZE];

  ssize_t recv_size;

  int retno;



  /* Create a tcp/ip socket */

  int mysocket = socket(PF_INET, SOCK_STREAM, 0);

  

  struct sockaddr_in my_addr;

  struct sockaddr_in their_addr;

  int sin_size;



  

  // ip(7) Create listen port, NOTE addresses in byte-order BYTEORDER(3)

  my_addr.sin_family = AF_INET; // By default

  my_addr.sin_port  = htons(12345);

  my_addr.sin_addr.s_addr  = htonl(INADDR_ANY);

  memset(my_addr.sin_zero, '\0', sizeof my_addr.sin_zero);



  // get connected

  retno = bind(mysocket, (struct sockaddr *) &my_addr, sizeof(struct sockaddr_in));

  retno = listen(mysocket, LISTEN_BACKLOG);

  sin_size = sizeof(struct sockaddr_in);



  // Make it a server, e.g. never ending

  while(1) {

    conn_fd = accept(mysocket, (struct sockaddr *)&their_addr, &sin_size);

    if (fork() == 0) {

      // child will help to echo the stuff

      while(1) {

      retno = recv(conn_fd, &buf, BUF_SIZE, 0);

      printf("%s\n", buf);

      if (retno <= 0)

        break; 

      retno = send(conn_fd, &buf, retno, 0);

      if (retno <= 0)

        break; 

      }

      close(conn_fd);

    }

  }

  close(mysocket);

  



return EX_OK;

}