tcpServer.c

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/******************************************************************************/
/* This file has been written by Sergio Perez Alcañiz <serpeal@disca.upv.es>  */
/*            Departamento de Informática de Sistemas y Computadores          */
/*            Universidad Politécnica de Valencia                             */
/*            Valencia (Spain)                                                */
/*                                                                            */
/* The RTL-lwIP project has been supported by the Spanish Government Research */
/* Office (CICYT) under grant TIC2002-04123-C03-03                            */
/******************************************************************************/

#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <stdio.h>
#include <unistd.h> /* close */


#define SUCCESS 0
#define ERROR   1

#define END_LINE 0x0A
#define SERVER_PORT 10
#define MAX_MSG 100

int main (int argc, char *argv[]) {
  
  int sd, newSd, cliLen;

  struct sockaddr_in cliAddr, servAddr;
  char line[MAX_MSG];


  /* create socket */
  sd = socket(AF_INET, SOCK_STREAM, 0);
   if(sd<0) {
    perror("cannot open socket ");
    return ERROR;
  }
  
  /* bind server port */
  servAddr.sin_family = AF_INET;
  servAddr.sin_addr.s_addr = htonl(INADDR_ANY);
  servAddr.sin_port = htons(SERVER_PORT);
  
  if(bind(sd, (struct sockaddr *) &servAddr, sizeof(servAddr))<0) {
    perror("cannot bind port ");
    return ERROR;
  }

  listen(sd,5);
  
    printf("%s: waiting for data on port TCP %u\n",argv[0],SERVER_PORT);

    cliLen = sizeof(cliAddr);
    newSd = accept(sd, (struct sockaddr *) &cliAddr, &cliLen);
    if(newSd<0) {
      perror("cannot accept connection ");
      return ERROR;
    }
    
    /* receive segments */
    while(read(newSd,line,10)!=0) {
      
      printf("%s: received from %s:TCP%d : %s\n", argv[0], 
             inet_ntoa(cliAddr.sin_addr),
             ntohs(cliAddr.sin_port), line);
    }
  
    close(sd);  

}

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