/*
 * Secure Network Transport Layer Library implementation.
 * This is a proprietary software. See COPYING for further details.
 *
 * (c) Askele Group 2013-2015 <http://askele.com>
 */

#include <stdlib.h>
#include <stdio.h>
#include <errno.h>
#include <string.h>
#include <pthread.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <sys/types.h>

#ifdef WIN32

#include <Winsock2.h>
#include <windows.h>
#include <rpc.h>

#else

#include <sys/select.h>
#include <netdb.h>
#include <unistd.h>
#include <uuid/uuid.h>

#endif

#include <fcntl.h>

#include <openssl/ssl.h>
#include <openssl/err.h>

#include <tdata/usrtc.h>
#include <sexpr/sexp.h>

#include <sntl/connection.h>

#ifdef WIN32
#define UUID_T_LENGTH 16

#ifdef uuid_t
#undef uuid_t
#endif

typedef unsigned char uuid_t[16];

void uuid_generate_random(uuid_t out){
  int i,a=0;
  LARGE_INTEGER frequency,t1;
  long int d;

  for(i=0;i<UUID_T_LENGTH;i++){
     a=rand();
    *(out+i)=a;
  }

   QueryPerformanceFrequency(&frequency);

   QueryPerformanceCounter(&t1);
   d=(long int)t1.QuadPart*1000/frequency.QuadPart;
   memcpy(out,&d,sizeof(d));
}

#endif
/* this function is an ugly implementation to get C string with uuid */
char *__generate_uuid(void)
{
#ifdef WIN32
  char *uuidc = NULL;
  uuid_t uuid_t_m;
  int len, i = 0,r=0;

  len = 33;
  if(!(uuidc = malloc(len))) return NULL;

  uuid_generate_random(uuid_t_m);

  for(i = 0; i < 16; i++)
      snprintf(uuidc+(2*i*sizeof(char)), len, "%02x", uuid_t_m[i]);

  return uuidc;

#else
  char *uuidc = NULL;
  uuid_t uuid;
  int len, i = 0;

  len = sizeof(char)*(sizeof(uuid_t)*2) + sizeof(char);
  if(!(uuidc = malloc(len))) return NULL;

  uuid_generate_time_safe(uuid);

  for(i = 0; i < sizeof(uuid_t); i++)
      snprintf(uuidc+(2*i*sizeof(char)), len, "%02x", uuid[i]);

  return uuidc;
#endif
}

/* networking helpers */
#ifndef WIN32
int __resolvehost(const char *hostname, char *buf, int buf_len,
                         struct hostent **rhp)
{
  struct hostent *hostbuf ;//= malloc(sizeof(struct hostent));
  struct hostent *hp = *rhp = NULL;
  int herr = 0, hres = 0;


  hostbuf = malloc(sizeof(struct hostent));
  if(!hostbuf) return NO_ADDRESS;
  hres = gethostbyname_r(hostname, hostbuf,
                         buf, buf_len, &hp, &herr);

  if(hres) return NO_ADDRESS;
  *rhp = hp;

  return NETDB_SUCCESS;
}
#endif

/* sexp helpers */
int sexp_list_car(sexp_t *expr, sexp_t **sx)
{
  if (!SEXP_IS_LIST(expr) || expr->list->ty != SEXP_VALUE)    return 1;

  *sx = expr->list;

  return 0;
}

int sexp_list_cdr(sexp_t *expr, sexp_t **sx)
{
  /* Dummy function. Can we do cdr properly? */
  if (!SEXP_IS_LIST(expr) || expr->list->ty != SEXP_VALUE)    return 1;

  if (!expr->list->next)    *sx = NULL;
  else    *sx = expr->list->next;

  return 0;
}