diff --git a/tests/lv2sc.c b/tests/lv2sc.c
new file mode 100644
index 0000000..e69de29
diff --git a/tests/lv2sd.c b/tests/lv2sd.c
new file mode 100644
index 0000000..7c50b51
--- /dev/null
+++ b/tests/lv2sd.c
@@ -0,0 +1,279 @@
+/*
+ * Secure Network Transport Layer Library v2 implementation.
+ * (sntllv2) it superseed all versions before due to the:
+ * - memory consumption
+ * - new features such as pulse emitting
+ * - performance optimization
+ *
+ * This is a proprietary software. See COPYING for further details.
+ *
+ * (c) Askele Group 2013-2015 <http://askele.com>
+ *
+ */
+
+
+#include <stdio.h>
+#define __USE_GNU
+#include <stdlib.h>
+#include <stdarg.h>
+#include <sys/types.h>
+#ifdef WIN32
+#include <Winsock2.h>
+#include <signal.h>
+#include <ws2tcpip.h>
+#else
+#include <sys/select.h>
+#include <sys/wait.h>
+#include <sys/socket.h>
+#include <sys/resource.h>
+#include <netdb.h>
+#include <unistd.h>
+#include <uuid/uuid.h>
+#include <execinfo.h>
+#include <netinet/in.h>
+#endif
+
+#include <tdata/usrtc.h>
+#include <sexpr/sexp.h>
+#include <sntl/connection.h>
+
+#include <pthread.h>
+// #include <unistd.h>
+#include <stdint.h>
+#include <getopt.h>
+#include <errno.h>
+
+/* helper functions */
+int __openlistener(int port)
+{
+  int sd;
+  struct sockaddr_in addr;
+
+  sd = socket(PF_INET, SOCK_STREAM, 0);
+  bzero(&addr, sizeof(addr));
+  addr.sin_family = AF_INET;
+  addr.sin_port = htons(port);
+  addr.sin_addr.s_addr = INADDR_ANY;
+  if ( bind(sd, (struct sockaddr*)&addr, sizeof(addr)) != 0 ) {
+    perror("can't bind port");
+    abort();
+  }
+  if ( listen(sd, 10) != 0 ) {
+    perror("Can't configure listening port");
+    abort();
+  }
+
+  return sd;
+}
+
+/*
+ * Validation of the SSL certificate
+ * this function must be exist.
+ */
+static int __validate_sslpem(conn_t *co)
+{
+  return 0;
+}
+
+/*
+ * validate - authorize user with password
+ */
+static int __secure_check(conn_t *co)
+{
+  return 0;
+}
+
+/*
+ * typed list callback
+ */
+static int __set_typed_list_callback(conn_t *co, int ch, char *desc)
+{
+  printf("allowed channel %d (%s)\n", ch, desc);
+  return 0;
+}
+
+/* list of rpc calls functions */
+usrtc_t *fulist;
+
+/* our fake */
+usrtc_t *__rettlist(conn_t *c)
+{
+  return fulist;
+}
+
+/* RPC functions implementation */
+static int __ar_add(void *m, sexp_t *sx)
+{
+//  int timout = rand() % 1000000;
+//  usleep(timout);
+  sexp_t *lsx = NULL, *sx_iter;
+  sxmsg_t *msg = (sxmsg_t *)m;
+  int idx, rc = 0;
+  
+  if(sexp_list_cdr(sx, &lsx)) {
+    printf("Invalid protocol\n");
+    return EINVAL;
+  }
+  
+  long int sum = 0;
+  SEXP_ITERATE_LIST(lsx, sx_iter, idx) {
+    if(!SEXP_IS_TYPE(sx_iter, SEXP_BASIC)) {
+      printf("Invalid value type\n");
+      return EINVAL;
+    }
+    sum += atoi(sx_iter->val);
+  }
+  rc = msg_return(msg, sum);
+  return rc;
+}
+
+static int __ar_multiply(void *data, sexp_t *sx)
+{
+  sexp_t *lsx = NULL;
+  int idx;
+  sexp_t *sx_iter;
+  if(sexp_list_cdr(sx, &lsx)) {
+    printf("Invalid protocol\n");
+    return EINVAL;
+  }
+  
+  long int mult = 0;
+  SEXP_ITERATE_LIST(lsx, sx_iter, idx) {
+    if(!SEXP_IS_TYPE(sx_iter, SEXP_BASIC)) {
+      printf("Invalid value type\n");
+      return EINVAL;
+    }
+    mult *= atoi(sx_iter->val);
+  }
+  char buf[128];
+  sprintf(buf, "(ar_mult_set (%ld))", mult);
+  printf("result %s\n", buf);
+  
+  return 0;
+}
+
+/* define a little bit */
+#define DEFAULT_PORT  13133
+
+static void sigpipe_handler(int a)
+{
+  return;
+}
+
+int main(int argc, char **argv)
+{
+  // set detailed signal handler
+  // struct sigaction sigact, sigpipe;
+  // sigact.sa_flags = SA_SIGINFO;
+  // sigact.sa_sigaction = signal_error;
+  // sigemptyset(&sigact.sa_mask);
+  // sigaction(SIGFPE, &sigact, 0);
+  // sigaction(SIGILL, &sigact, 0);
+  // sigaction(SIGSEGV, &sigact, 0);
+  // sigaction(SIGBUS, &sigact, 0);
+
+  // memset(&sigpipe, 0, sizeof(struct sigaction));
+  // sigpipe.sa_handler = sigpipe_handler;
+  // sigaction(SIGPIPE, &sigpipe, NULL);
+  
+  char *rootca = NULL, *cert = NULL;
+  conn_sys_t *ssys = connections_create();
+  int port = DEFAULT_PORT;
+  int opt;
+
+  while((opt = getopt(argc, argv, "p:r:u:")) != -1) {
+    switch(opt) {
+    case 'p':
+      port = atoi(optarg);
+      break;
+    case 'r':
+      rootca = strdup(optarg);
+      break;
+    case 'u':
+      cert = strdup(optarg);
+      break;
+    default:
+      fprintf(stderr, "usage: %s [-p <PORTNUM>] -r <PATH to Root CA> -u <PATH"
+              " to SSL certificate>\n", argv[0]);
+      return EINVAL;
+    }
+  }
+
+  if(!rootca) {
+    fprintf(stderr, "Root CA not pointed.\n Failure.\n");
+    return EINVAL;
+  }
+
+  if(!cert) {
+    fprintf(stderr, "User certificate not pointed.\n Failure.\n");
+    return EINVAL;
+  }
+
+  /* all is fine let's init connection subsystem */
+  if(ssys) {
+    fprintf(stderr, "Subsystem init failed: %d\n", opt);
+    return 2;
+  }
+  /* set wroking certificates */
+  opt = connections_subsystem_setsslserts(rootca, cert, cert);
+  if(opt) {
+    fprintf(stderr, "Subsystem init failed (set SSL x.509 pems): %d\n", opt);
+    return opt;
+  }
+
+  /* clean up */
+  free(rootca);
+  free(cert);
+
+  /* set important callbacks to do the security checking */
+  connections_subsystem_set_securecheck(ssys, __secure_check);
+  connections_subsystem_set_sslvalidator(ssys, __validate_sslpem);
+  /* set a callback, it's optional and doesn't required in server side apps */
+  connections_subsystem_set_rpctlist_call(ssys, __set_typed_list_callback);
+
+  /* ok, now we need to construct RPC lists (channels) */
+  if(!(fulist = malloc(sizeof(usrtc_t)))) {
+    fprintf(stderr, "Cannot allocate memory for RPC lists\n Failure.\n");
+    return ENOMEM;
+  }
+  opt = sntl_rpclist_init(fulist);
+  if(opt) {
+    fprintf(stderr, "Failed to init rpc list\n Failure.\n");
+    return opt;
+  }
+
+  /* we will add one channel with type id 12 "Demo rpc list" */
+  opt = sntl_rpclist_add(fulist, 12, "Demo RPC list", NULL);
+  if(opt) {
+    fprintf(stderr, "Failed to add typed RPC channel\n Failure.\n");
+    return opt;
+  }
+  /* ok, let's add two functions */
+  opt = sntl_rpclist_add_function(fulist, 12, "ar-add", __ar_add);
+  if(opt) {
+  __fail:
+    fprintf(stderr, "Failed to add functions to typed RPC channel\n Failure.\n");
+    return opt;
+  }
+  opt = sntl_rpclist_add_function(fulist, 12, "ar-multiply", __ar_multiply);
+  if(opt) goto __fail;
+
+  /* ok, setup it */
+  connections_subsystem_setrpclist_function(__rettlist);
+
+  /* now we're ready to run the listen process */
+  int srv = __openlistener(port);
+  while(1) {
+    struct sockaddr_in addr;
+    socklen_t len = sizeof(addr);
+    conn_t *co;
+
+    int client = accept(srv, (struct sockaddr*)&addr, &len); /* accept connection as usual */
+    co = connection_master_link(ssys, client, NULL); /* create connection, that's all */
+    if(!co) {
+      fprintf(stderr, "Cannot create connetion (%d)\n", opt);
+    }
+  }
+
+  return 0;
+}