#include "stdio.h"
#include "stdlib.h"
#include "string.h"
#include "unistd.h"
#include "errno.h"
#include "sys/socket.h"
#include "sys/types.h"
#include "arpa/inet.h"
#include "netdb.h"
#include "netinet/in.h"
#include "sys/wait.h"

#define PORTA 6666
#define ERRO -1
#define TAMMAX 250     //tamanho maximo da string

int main () {

struct sockaddr_in network,local;
int sock,
    newSock,
    resp,
    strucsize,pros;

char msgbuffer [TAMMAX];

if(fork() == 0){
  sock = socket (AF_INET, SOCK_STREAM, 0);
  if (sock == ERRO) {
   perror ("Socket");
   exit (0);
  }
  bzero ((char *)&local, sizeof (local));
  local.sin_family = AF_INET;
  local.sin_port = htons (PORTA);
  local.sin_addr.s_addr = INADDR_ANY;
  strucsize = sizeof (local);
  resp = bind (sock, (struct sockaddr *)&local, strucsize);

  if (resp == ERRO) {
   perror ("Bind");
   exit (0);
  }
//numero maximo de conexões agente definiu aqui
  listen (sock, 5);
for(;;) {        
  if((newSock = accept (sock, (struct sockaddr *)&network, &strucsize))==1) {
    perror("accept");
    exit(1);
  }

  if (newSock == ERRO) {
   perror ("Accept");
   exit (0);
  }
  if(!fork()) {
  printf ("Recebendo conexao de: %s\n", inet_ntoa (network.sin_addr));
  //permite o cliente da uma entrada e a mostra, se a entrada for exit bula o laço "for" infinito
   for (;;) {
    recv (newSock, msgbuffer, TAMMAX, 0);
    fprintf (stdout, "\nMensagem Recebida: %s\n", msgbuffer);
    if (!strcmp (msgbuffer, "exit")) break;
   }
  }
}
}
}

int recv(int Meusocket, void *buf, int len, unsigned int flags);

#include "stdio.h"
#include "stdlib.h"
#include "string.h"
#include "errno.h"
#include "sys/socket.h"
#include "sys/types.h"
#include "arpa/inet.h"
#include "netdb.h"
#include "netinet/in.h"
#include "sys/wait.h"

#define PORTA 6666
#define ERRO -1
#define TAMMAX 250 //tamanho maximo da string

main (int argc, char * * argv) {

struct sockaddr_in network;

int sock,
    newSock,
    resp,
    strucsize;

char msg [TAMMAX];

if (argc < 2) {
  printf ("Use %s <host>\n\n", argv [0]);
  exit (0);
  }

sock = socket (AF_INET, SOCK_STREAM, 0);

if (sock == ERRO) {
  perror ("Socket");
  exit (0);
  }

bzero ((char *)&network, sizeof (network));
network.sin_family = AF_INET;
network.sin_port = htons (PORTA);
network.sin_addr.s_addr = inet_addr (argv [1]);

strucsize = sizeof (network);

resp = connect (sock, (struct sockaddr *)&network, strucsize);

if (resp == ERRO) {
  perror ("Connect");
  exit (0);
  }

fprintf (stdout, "Conectado em %s\n", argv [1]);

for (;;) {
  printf ("\nMensagem: ");
   fgets(msg, sizeof(msg), stdin);
   msg[strlen(msg)-1] = '\0';
  send (sock, msg, sizeof (msg), 0);
  if (!strcmp (msg, "exit"))
     {
     exit (0);
     }
   }
}