/*
 * This file is part of the Nice GLib ICE library.
 *
 * Unit test for ICE full-mode related features.
 *
 * (C) 2007 Nokia Corporation. All rights reserved.
 *  Contact: Kai Vehmanen
 * (C) 2017 Collabora Ltd
 *  Contact: Olivier Crete <olivier.crete@collabora.com>
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is the Nice GLib ICE library.
 *
 * The Initial Developers of the Original Code are Collabora Ltd and Nokia
 * Corporation. All Rights Reserved.
 *
 * Contributors:
 *   Kai Vehmanen, Nokia
 *
 * Alternatively, the contents of this file may be used under the terms of the
 * the GNU Lesser General Public License Version 2.1 (the "LGPL"), in which
 * case the provisions of LGPL are applicable instead of those above. If you
 * wish to allow use of your version of this file only under the terms of the
 * LGPL and not to allow others to use your version of this file under the
 * MPL, indicate your decision by deleting the provisions above and replace
 * them with the notice and other provisions required by the LGPL. If you do
 * not delete the provisions above, a recipient may use your version of this
 * file under either the MPL or the LGPL.
 */
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif

#include "agent.h"
#include "candidate-priv.h"

#include "socket/socket.h"

#include <stdlib.h>
#include <string.h>



static NiceComponentState global_lagent_state[2] = { NICE_COMPONENT_STATE_LAST, NICE_COMPONENT_STATE_LAST };
static NiceComponentState global_ragent_state[2] = { NICE_COMPONENT_STATE_LAST, NICE_COMPONENT_STATE_LAST };
static guint global_components_ready = 0;
static guint global_components_ready_exit = 0;
static guint global_components_failed = 0;
static guint global_components_failed_exit = 0;
static GMainLoop *global_mainloop = NULL;
static gboolean global_lagent_gathering_done = FALSE;
static gboolean global_ragent_gathering_done = FALSE;
static gboolean global_lagent_ibr_received = FALSE;
static gboolean global_ragent_ibr_received = FALSE;
static int global_lagent_cands = 0;
static int global_ragent_cands = 0;
static gint global_ragent_read = 0;
static guint global_exit_when_ibr_received = 0;

static void priv_print_global_status (void)
{
  g_debug ("\tgathering_done=%d", global_lagent_gathering_done && global_ragent_gathering_done);
  g_debug ("\tlstate[rtp]=%d [rtcp]=%d", global_lagent_state[0], global_lagent_state[1]);
  g_debug ("\trstate[rtp]=%d [rtcp]=%d", global_ragent_state[0], global_ragent_state[1]);
  g_debug ("\tL cands=%d R cands=%d", global_lagent_cands, global_ragent_cands);
}

static gboolean timer_cb (gpointer pointer)
{
  g_debug ("test-drop-invalid:%s: %p", G_STRFUNC, pointer);

  /* signal status via a global variable */

  /* note: should not be reached, abort */
  g_error ("ERROR: test has got stuck, aborting...");

  return FALSE;
}

static void cb_nice_recv (NiceAgent *agent, guint stream_id, guint component_id, guint len, gchar *buf, gpointer user_data)
{
  g_debug ("test-drop-invalid:%s: %p", G_STRFUNC, user_data);

  /* XXX: dear compiler, these are for you: */
  (void)agent; (void)stream_id; (void)component_id; (void)buf;

  /* Core of the test
   * Assert on any unreleated packet received. This would include anything
   * send before the negotiation is over.
   */
  g_assert_cmpuint (len, ==, 16);
  g_assert_true (strncmp ("1234567812345678", buf, 16) == 0);

  if (component_id == 2)
    return;

  if (GPOINTER_TO_UINT (user_data) == 2) {
    g_debug ("right agent received %d bytes, stopping mainloop", len);
    global_ragent_read = len;
    g_main_loop_quit (global_mainloop);
  }
}

static void cb_candidate_gathering_done(NiceAgent *agent, guint stream_id, gpointer data)
{
  g_debug ("test-drop-invalid:%s: %p", G_STRFUNC, data);

  if (GPOINTER_TO_UINT (data) == 1)
    global_lagent_gathering_done = TRUE;
  else if (GPOINTER_TO_UINT (data) == 2)
    global_ragent_gathering_done = TRUE;

  if (global_lagent_gathering_done &&
      global_ragent_gathering_done)
    g_main_loop_quit (global_mainloop);

  /* XXX: dear compiler, these are for you: */
  (void)agent;
}

static void cb_component_state_changed (NiceAgent *agent, guint stream_id, guint component_id, guint state, gpointer data)
{
  gboolean ready_to_connected = FALSE;
  g_debug ("test-drop-invalid:%s: %p", G_STRFUNC, data);

  if (GPOINTER_TO_UINT (data) == 1) {
    if (global_lagent_state[component_id - 1] == NICE_COMPONENT_STATE_READY &&
        state == NICE_COMPONENT_STATE_CONNECTED)
      ready_to_connected = TRUE;
    global_lagent_state[component_id - 1] = state;
  } else if (GPOINTER_TO_UINT (data) == 2) {
    if (global_ragent_state[component_id - 1] == NICE_COMPONENT_STATE_READY &&
        state == NICE_COMPONENT_STATE_CONNECTED)
      ready_to_connected = TRUE;
    global_ragent_state[component_id - 1] = state;
  }

  if (state == NICE_COMPONENT_STATE_READY)
    global_components_ready++;
  else if (state == NICE_COMPONENT_STATE_CONNECTED && ready_to_connected)
    global_components_ready--;
  if (state == NICE_COMPONENT_STATE_FAILED)
    global_components_failed++;

  g_debug ("test-drop-invalid: checks READY/EXIT-AT %u/%u.", global_components_ready, global_components_ready_exit);
  g_debug ("test-drop-invalid: checks FAILED/EXIT-AT %u/%u.", global_components_failed, global_components_failed_exit);

  /* signal status via a global variable */
  if (global_components_ready == global_components_ready_exit &&
      global_components_failed == global_components_failed_exit) {
    g_debug ("Components ready/failed achieved. Stopping mailoop");
    g_main_loop_quit (global_mainloop); 
    return;
  }

  /* XXX: dear compiler, these are for you: */
  (void)agent; (void)stream_id; (void)data; (void)component_id;
}

static void cb_new_selected_pair(NiceAgent *agent, guint stream_id, guint component_id, 
				 gchar *lfoundation, gchar* rfoundation, gpointer data)
{
  g_debug ("test-drop-invalid:%s: %p", G_STRFUNC, data);

  if (GPOINTER_TO_UINT (data) == 1)
    ++global_lagent_cands;
  else if (GPOINTER_TO_UINT (data) == 2)
    ++global_ragent_cands;

  /* XXX: dear compiler, these are for you: */
  (void)agent; (void)stream_id; (void)component_id; (void)lfoundation; (void)rfoundation;
}

static void cb_new_candidate(NiceAgent *agent, guint stream_id, guint component_id, 
			     gchar *foundation, gpointer data)
{
  g_debug ("test-drop-invalid:%s: %p", G_STRFUNC, data);

  /* XXX: dear compiler, these are for you: */
  (void)agent; (void)stream_id; (void)data; (void)component_id; (void)foundation;
}

static void cb_initial_binding_request_received(NiceAgent *agent, guint stream_id, gpointer data)
{
  g_debug ("test-drop-invalid:%s: %p", G_STRFUNC, data);

  if (GPOINTER_TO_UINT (data) == 1)
    global_lagent_ibr_received = TRUE;
  else if (GPOINTER_TO_UINT (data) == 2)
    global_ragent_ibr_received = TRUE;

  if (global_exit_when_ibr_received) {
    g_debug ("Received initial binding request. Stopping mailoop");
    g_main_loop_quit (global_mainloop);
  }

  /* XXX: dear compiler, these are for you: */
  (void)agent; (void)stream_id; (void)data;
}

static void set_candidates (NiceAgent *from, guint from_stream,
    NiceAgent *to, guint to_stream, guint component)
{
  GSList *cands = NULL;
  GSList *peer_cands = NULL;
  GSList *item1, *item2;

  cands = nice_agent_get_local_candidates (from, from_stream, component);
  peer_cands = nice_agent_get_local_candidates (to, to_stream, component);

  /*
   * Core of the test:
   *
   * Send packets that shoudl be dropped.
   */

  for (item1 = cands; item1; item1 = item1->next) {
    NiceCandidateImpl *cand = item1->data;
    NiceSocket *nicesock = cand->sockptr;

    g_assert_true (nicesock);

    for (item2 = peer_cands; item2; item2 = item2->next) {
      NiceCandidate *target_cand = item2->data;

      nice_socket_send (nicesock, &target_cand->addr, 12, "123456789AB");
    }

  }

  nice_agent_set_remote_candidates (to, to_stream, component, cands);

  g_slist_free_full (cands, (GDestroyNotify) nice_candidate_free);
  g_slist_free_full (peer_cands, (GDestroyNotify) nice_candidate_free);
}

static void set_credentials (NiceAgent *lagent, guint lstream,
    NiceAgent *ragent, guint rstream)
{
  gchar *ufrag = NULL, *password = NULL;

  nice_agent_get_local_credentials(lagent, lstream, &ufrag, &password);
  nice_agent_set_remote_credentials (ragent, rstream, ufrag, password);
  g_free (ufrag);
  g_free (password);
  nice_agent_get_local_credentials(ragent, rstream, &ufrag, &password);
  nice_agent_set_remote_credentials (lagent, lstream, ufrag, password);
  g_free (ufrag);
  g_free (password);
}

static guint16
get_port (NiceAgent *agent, guint stream_id, guint component_id)
{
  GSList *cands = nice_agent_get_local_candidates (agent, stream_id,
      component_id);
  GSList *item;
  guint16 port = 0;

  g_assert_true (cands != NULL);

  for (item = cands; item; item = item->next) {
    NiceCandidate *cand = item->data;
    port = nice_address_get_port (&cand->addr);
    break;
  }
  g_assert_true (port != 0);

  g_slist_free_full (cands, (GDestroyNotify) nice_candidate_free);

  return port;
}

static int run_full_test (NiceAgent *lagent, NiceAgent *ragent, NiceAddress *baseaddr, guint ready, guint failed)
{
  guint ls_id, rs_id;
  gint ret;
  guint16 port;

  /* XXX: dear compiler, this is for you */
  (void)baseaddr;

  /* step: initialize variables modified by the callbacks */
  global_components_ready = 0;
  global_components_ready_exit = ready;
  global_components_failed = 0;
  global_components_failed_exit = failed;
  global_lagent_gathering_done = FALSE;
  global_ragent_gathering_done = FALSE;
  global_lagent_ibr_received =
    global_ragent_ibr_received = FALSE;
  global_lagent_cands =
    global_ragent_cands = 0;

  g_object_set (G_OBJECT (lagent), "controlling-mode", TRUE, NULL);
  g_object_set (G_OBJECT (ragent), "controlling-mode", FALSE, NULL);

  /* step: add one stream, with RTP+RTCP components, to each agent */
  ls_id = nice_agent_add_stream (lagent, 2);

  rs_id = nice_agent_add_stream (ragent, 2);
  g_assert_cmpuint (ls_id, >, 0);
  g_assert_cmpuint (rs_id, >, 0);

  /* Gather candidates and test nice_agent_set_port_range */
  nice_agent_set_port_range (lagent, ls_id, 1, 10000, 11000);
  nice_agent_set_port_range (lagent, ls_id, 2, 11000, 12000);
  g_assert_true (nice_agent_gather_candidates (lagent, ls_id) == TRUE);

  port = get_port (lagent, ls_id, 1);
  nice_agent_set_port_range (ragent, rs_id, 1, 12000, 13000);
  nice_agent_set_port_range (ragent, rs_id, 2, port, port);
  g_assert_true (nice_agent_gather_candidates (ragent, rs_id) == FALSE);
  g_assert_true (nice_agent_get_local_candidates (ragent, rs_id, 1) == NULL);
  g_assert_true (nice_agent_get_local_candidates (ragent, rs_id, 2) == NULL);
  nice_agent_set_port_range (ragent, rs_id, 2, 13000, 14000);
  g_assert_true (nice_agent_gather_candidates (ragent, rs_id) == TRUE);

  {
    GSList *cands = NULL, *i;
    NiceCandidate *cand = NULL;

    cands = nice_agent_get_local_candidates (lagent, ls_id, 1);
    g_assert_cmpuint (g_slist_length (cands), ==, 1);
    cand = cands->data;
    g_assert_cmpint (cand->type, ==, NICE_CANDIDATE_TYPE_HOST);
    g_assert_cmpuint (nice_address_get_port (&cand->addr), >=, 10000);
    g_assert_cmpuint (nice_address_get_port (&cand->addr), <=, 11000);
    for (i = cands; i; i = i->next)
      nice_candidate_free ((NiceCandidate *) i->data);
    g_slist_free (cands);

    cands = nice_agent_get_local_candidates (lagent, ls_id, 2);
    g_assert_cmpuint (g_slist_length (cands), ==, 1);
    cand = cands->data;
    g_assert_cmpuint (cand->type, ==, NICE_CANDIDATE_TYPE_HOST);
    g_assert_cmpuint (nice_address_get_port (&cand->addr), >=, 11000);
    g_assert_cmpuint (nice_address_get_port (&cand->addr), <=, 12000);
    for (i = cands; i; i = i->next)
      nice_candidate_free ((NiceCandidate *) i->data);
    g_slist_free (cands);

    cands = nice_agent_get_local_candidates (ragent, rs_id, 1);
    g_assert_cmpuint (g_slist_length (cands), ==, 1);
    cand = cands->data;
    g_assert_cmpint (cand->type, ==, NICE_CANDIDATE_TYPE_HOST);
    g_assert_cmpuint (nice_address_get_port (&cand->addr), >=, 12000);
    g_assert_cmpuint (nice_address_get_port (&cand->addr), <=, 13000);
    for (i = cands; i; i = i->next)
      nice_candidate_free ((NiceCandidate *) i->data);
    g_slist_free (cands);

    cands = nice_agent_get_local_candidates (ragent, rs_id, 2);
    g_assert_cmpuint (g_slist_length (cands), ==, 1);
    cand = cands->data;
    g_assert_cmpint (cand->type, ==, NICE_CANDIDATE_TYPE_HOST);
    g_assert_cmpuint (nice_address_get_port (&cand->addr), >=, 13000);
    g_assert_cmpuint (nice_address_get_port (&cand->addr), <=, 14000);
    for (i = cands; i; i = i->next)
      nice_candidate_free ((NiceCandidate *) i->data);
    g_slist_free (cands);

  }

  /* step: attach to mainloop (needed to register the fds) */
  nice_agent_attach_recv (lagent, ls_id, NICE_COMPONENT_TYPE_RTP,
      g_main_loop_get_context (global_mainloop), cb_nice_recv,
      GUINT_TO_POINTER (1));
  nice_agent_attach_recv (lagent, ls_id, NICE_COMPONENT_TYPE_RTCP,
      g_main_loop_get_context (global_mainloop), cb_nice_recv,
      GUINT_TO_POINTER (1));
  nice_agent_attach_recv (ragent, rs_id, NICE_COMPONENT_TYPE_RTP,
      g_main_loop_get_context (global_mainloop), cb_nice_recv,
      GUINT_TO_POINTER (2));
  nice_agent_attach_recv (ragent, rs_id, NICE_COMPONENT_TYPE_RTCP,
      g_main_loop_get_context (global_mainloop), cb_nice_recv,
      GUINT_TO_POINTER (2));

  /* step: run mainloop until local candidates are ready
   *       (see timer_cb() above) */
  if (global_lagent_gathering_done != TRUE ||
      global_ragent_gathering_done != TRUE) {
    g_debug ("test-drop-invalid: Added streams, running mainloop until 'candidate-gathering-done'...");
    g_main_loop_run (global_mainloop);
    g_assert_true (global_lagent_gathering_done == TRUE);
    g_assert_true (global_ragent_gathering_done == TRUE);
  }

  set_credentials (lagent, ls_id, ragent, rs_id);

  /* step: pass the remote candidates to agents  */
  set_candidates (ragent, rs_id, lagent, ls_id, NICE_COMPONENT_TYPE_RTP);
  set_candidates (ragent, rs_id, lagent, ls_id, NICE_COMPONENT_TYPE_RTCP);
  set_candidates (lagent, ls_id, ragent, rs_id, NICE_COMPONENT_TYPE_RTP);
  set_candidates (lagent, ls_id, ragent, rs_id, NICE_COMPONENT_TYPE_RTCP);

  g_debug ("test-drop-invalid: Set properties, next running mainloop until connectivity checks succeed...");

  /* step: run the mainloop until connectivity checks succeed
   *       (see timer_cb() above) */
  g_main_loop_run (global_mainloop);

  /* note: verify that STUN binding requests were sent */
  g_assert_true (global_lagent_ibr_received == TRUE);
  g_assert_true (global_ragent_ibr_received == TRUE);

  /* note: Send a packet from another address */
  /* These should also be ignored */
  {
    NiceCandidate *local_cand = NULL;
    NiceCandidate *remote_cand = NULL;
    NiceSocket *tmpsock;
    GError *error = NULL;

    g_assert_true (nice_agent_get_selected_pair (lagent, ls_id, 1, &local_cand,
            &remote_cand));
    g_assert_true (local_cand);
    g_assert_true (remote_cand);

    tmpsock = nice_udp_bsd_socket_new (g_main_context_default (), NULL, &error);
    g_assert_no_error (error);
    nice_socket_send (tmpsock, &remote_cand->addr, 4, "ABCD");
    nice_socket_send (tmpsock, &local_cand->addr, 5, "ABCDE");
    nice_socket_free (tmpsock);
  }

  /* note: test payload send and receive */
  global_ragent_read = 0;
  ret = nice_agent_send (lagent, ls_id, 1, 16, "1234567812345678");
  g_assert_true (ret != -1);
  g_debug ("Sent %d bytes", ret);
  g_assert_cmpint (ret, ==, 16);
  while (global_ragent_read != 16)
    g_main_context_iteration (NULL, TRUE);
  g_assert_cmpint (global_ragent_read, ==, 16);

  g_debug ("test-drop-invalid: Ran mainloop, removing streams...");

  /* step: clean up resources and exit */

  nice_agent_remove_stream (lagent, ls_id);
  nice_agent_remove_stream (ragent, rs_id);

  return 0;
}

int main (void)
{
  NiceAgent *lagent, *ragent;      /* agent's L and R */
  NiceAddress baseaddr;
  int result;
  guint timer_id;

#ifdef G_OS_WIN32
  WSADATA w;

  WSAStartup(0x0202, &w);
#endif

  global_mainloop = g_main_loop_new (NULL, FALSE);

  /* step: create the agents L and R */
  lagent = nice_agent_new (g_main_loop_get_context (global_mainloop),
      NICE_COMPATIBILITY_RFC5245);
  ragent = nice_agent_new (g_main_loop_get_context (global_mainloop),
      NICE_COMPATIBILITY_RFC5245);

  g_object_set (G_OBJECT (lagent), "ice-tcp", FALSE,  NULL);
  g_object_set (G_OBJECT (ragent), "ice-tcp", FALSE,  NULL);

  g_object_set (G_OBJECT (lagent), "upnp", FALSE, NULL);
  g_object_set (G_OBJECT (ragent), "upnp", FALSE, NULL);

  nice_agent_set_software (lagent, "test-drop-invalid, Left Agent");
  nice_agent_set_software (ragent, "test-drop-invalid, Right Agent");

  /* step: add a timer to catch state changes triggered by signals */
  timer_id = g_timeout_add (30000, timer_cb, NULL);

  /* step: specify which local interface to use */
  if (!nice_address_set_from_string (&baseaddr, "127.0.0.1"))
    g_assert_not_reached ();
  nice_agent_add_local_address (lagent, &baseaddr);
  nice_agent_add_local_address (ragent, &baseaddr);

  g_signal_connect (G_OBJECT (lagent), "candidate-gathering-done",
      G_CALLBACK (cb_candidate_gathering_done), GUINT_TO_POINTER(1));
  g_signal_connect (G_OBJECT (ragent), "candidate-gathering-done",
      G_CALLBACK (cb_candidate_gathering_done), GUINT_TO_POINTER (2));
  g_signal_connect (G_OBJECT (lagent), "component-state-changed",
      G_CALLBACK (cb_component_state_changed), GUINT_TO_POINTER (1));
  g_signal_connect (G_OBJECT (ragent), "component-state-changed",
      G_CALLBACK (cb_component_state_changed), GUINT_TO_POINTER (2));
  g_signal_connect (G_OBJECT (lagent), "new-selected-pair",
      G_CALLBACK (cb_new_selected_pair), GUINT_TO_POINTER(1));
  g_signal_connect (G_OBJECT (ragent), "new-selected-pair",
      G_CALLBACK (cb_new_selected_pair), GUINT_TO_POINTER (2));
  g_signal_connect (G_OBJECT (lagent), "new-candidate",
      G_CALLBACK (cb_new_candidate), GUINT_TO_POINTER (1));
  g_signal_connect (G_OBJECT (ragent), "new-candidate",
      G_CALLBACK (cb_new_candidate), GUINT_TO_POINTER (2));
  g_signal_connect (G_OBJECT (lagent), "initial-binding-request-received",
      G_CALLBACK (cb_initial_binding_request_received),
      GUINT_TO_POINTER (1));
  g_signal_connect (G_OBJECT (ragent), "initial-binding-request-received",
      G_CALLBACK (cb_initial_binding_request_received),
      GUINT_TO_POINTER (2));

  g_object_set (G_OBJECT (lagent), "upnp", FALSE,  NULL);
  g_object_set (G_OBJECT (ragent), "upnp", FALSE,  NULL);


  /* step: run test the first time */
  g_debug ("test-drop-invalid: TEST STARTS / running test for the 1st time");
  result = run_full_test (lagent, ragent, &baseaddr, 4 ,0);
  priv_print_global_status ();
  g_assert_cmpint (result, ==, 0);
  g_assert_cmpint (global_lagent_state[0], ==, NICE_COMPONENT_STATE_READY);
  g_assert_cmpint (global_lagent_state[1], ==, NICE_COMPONENT_STATE_READY);
  g_assert_cmpint (global_ragent_state[0], ==, NICE_COMPONENT_STATE_READY);
  g_assert_cmpint (global_ragent_state[1], ==, NICE_COMPONENT_STATE_READY);
  /* When using TURN, we get peer reflexive candidates for the host cands
     that we removed so we can get another new_selected_pair signal later
     depending on timing/racing, we could double (or not) the amount we expected
  */

  /* note: verify that correct number of local candidates were reported */
  g_assert_cmpint (global_lagent_cands, ==, 2);
  g_assert_cmpint (global_ragent_cands, ==, 2);

  g_object_unref (lagent);
  g_object_unref (ragent);

  g_main_loop_unref (global_mainloop);
  global_mainloop = NULL;

  g_source_remove (timer_id);
#ifdef G_OS_WIN32
  WSACleanup();
#endif
  return result;
}
