/******************************************************************************//* This file has been written by Sergio Perez Alca駃z <serpeal@upvnet.upv.es> *//*            Departamento de Inform醫ica de Sistemas y Computadores          *//*            Universidad Polit閏nica 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 SERVER_PORT 7#define MAX_MSG 100int main (int argc, char *argv[]) {  int sd, rc, i;  struct sockaddr_in localAddr, servAddr;  struct hostent *h;    if(argc < 3) {    printf("usage: %s <server> <data1> <data2> ... <dataN>\n",argv[0]);    exit(1);  }  h = gethostbyname(argv[1]);  if(h==NULL) {    printf("%s: unknown host '%s'\n",argv[0],argv[1]);    exit(1);  }  servAddr.sin_family = h->h_addrtype;  memcpy((char *) &servAddr.sin_addr.s_addr, h->h_addr_list[0], h->h_length);  servAddr.sin_port = htons(SERVER_PORT);  /* create socket */  sd = socket(AF_INET, SOCK_STREAM, 0);  if(sd<0) {    perror("cannot open socket ");    exit(1);  }  /* bind any port number */  localAddr.sin_family = AF_INET;  localAddr.sin_addr.s_addr = htonl(INADDR_ANY);  localAddr.sin_port = htons(0);    rc = bind(sd, (struct sockaddr *) &localAddr, sizeof(localAddr));  if(rc<0) {    printf("%s: cannot bind port TCP %u\n",argv[0],SERVER_PORT);    perror("error ");    exit(1);  }				  /* connect to server */  rc = connect(sd, (struct sockaddr *) &servAddr, sizeof(servAddr));  if(rc<0) {    perror("cannot connect ");    exit(1);  }  for(i=2;i<argc;i++) {        rc = send(sd, argv[i], strlen(argv[i]) + 1, 0);        if(rc<0) {      perror("cannot send data ");      close(sd);      exit(1);        }    printf("%s: data%u sent (%s)\n",argv[0],i-1,argv[i]);     }	  close(sd);return 0;  }