bakalarska_praca/rs232_kanal/server.c

//////////////////////////////////////////////////
// Bakalarska praca                             //
// Meno studenta: Tomas Lukac                   //
// Veduci BP: prof. Ing. Milos Drutarovsky CSc. //
// Skola: KEMT FEI TUKE                         //
// Datum poslednej upravy: 12.3.2020            //
//////////////////////////////////////////////////

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <wolfssl/ssl.h>
#include <wolfssl/certs_test.h>
#include <wolfssl/wolfcrypt/types.h>

#ifdef _WIN32
#include <Windows.h>
#include <io.h>
#include <fcntl.h>
#define O_NOCTTY 0
#else
#include <unistd.h>
#endif

#include "../kniznica/kryptografia.h"
#include "../kniznica/komunikacia.h"
#include "../kniznica/rs232.h"

int rs232_poslat;
int rs232_prijat;

int rs232_citanie(WOLFSSL *ssl, char *buf, int sz, void *ctx)
{  
  int uspech = 0;
  while(uspech <= 0)
  {
    uspech = read(rs232_prijat, buf, sz);
  }
  return uspech;
}

int rs232_zapis(WOLFSSL *ssl, char *buf, int sz, void *ctx)
{
  int uspech = 0;
  uspech = write(rs232_poslat, buf, sz);
  return uspech;
}

int main(int argc, char const *argv[])
{
  WOLFSSL *ssl; 
  WOLFSSL_CTX *ctx = NULL;
  int cislo_rozhrania = 5;
  int rychlost = 9600;
  char rezim[]={'8','N','1', 0};
  
  rs232_poslat = open("klient.txt", O_WRONLY | O_NOCTTY);
  printf("%d\n", rs232_poslat);
  rs232_prijat = open("server.txt", O_RDONLY | O_NOCTTY);
  printf("%d\n", rs232_prijat);

  
  int uspech;
 /* uspech = rs232_otvorit_rozhranie(cislo_rozhrania, rychlost, rezim, 0);
  if(uspech == -1)
  {
    return -1;
  }
*/
  if((ctx = nastavit_ctx_server()) == NULL)
  {
    return -1;
  }
  const char* subor_certifikat = "../certifikaty/server/server_rsa.pem";
  const char* subor_kluc = "../certifikaty/server/server_rsa.key";
  if(nacitat_certifikaty(ctx, subor_certifikat, subor_kluc) == -1) return -1;

  wolfSSL_SetIOSend(ctx, rs232_zapis);
  wolfSSL_SetIORecv(ctx, rs232_citanie);
  
  if ((ssl = wolfSSL_new(ctx)) == NULL) 
  {
    printf("Nepodarilo sa vytvorit ssl relaciu\n");
    wolfSSL_CTX_free(ctx);
    return -1;
  }

  wolfSSL_set_fd(ssl, rs232_prijat);
  wolfSSL_set_using_nonblock(ssl, rs232_prijat);
  
  printf("bol som tu\n");
  while(uspech != SSL_SUCCESS)
  {
    uspech = wolfSSL_accept(ssl);
    printf("%d\n", uspech);
  }
    printf("bol som aj tu tu\n");


  char sprava[100];
  wolfSSL_read(ssl, sprava, 10);
  printf("%s\n", sprava);

  RS232_CloseComport(cislo_rozhrania);

  return 0;
}