pjnath/src/pjnath-test/ice_test.c - pjproject - Gitiles

 /* $Id$ */
 /*
  * Copyright (C) 2003-2007 Benny Prijono <benny@prijono.org>
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation; either version 2 of the License, or
  * (at your option) any later version.
  *
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  */
 #include "test.h"

 #define THIS_FILE   "ice_test.c"


 struct ice_data
 {
     const char	   *obj_name;
     pj_bool_t	    complete;
     pj_status_t	    err_code;
     unsigned	    rx_rtp_cnt;
     unsigned	    rx_rtcp_cnt;

     unsigned	    rx_rtp_count;
     char	    last_rx_rtp_data[32];
     unsigned	    rx_rtcp_count;
     char	    last_rx_rtcp_data[32];
 };

 static pj_stun_config stun_cfg;

 static void on_ice_complete(pj_ice_strans *icest,
 			    pj_status_t status)
 {
     struct ice_data *id = (struct ice_data*) icest->user_data;
     id->complete = PJ_TRUE;
     id->err_code = status;
     PJ_LOG(3,(THIS_FILE, "     ICE %s complete %s", id->obj_name,
 	      (status==PJ_SUCCESS ? "successfully" : "with failure")));
 }


 static void on_rx_data(pj_ice_strans *icest, unsigned comp_id,
 		       void *pkt, pj_size_t size,
 		       const pj_sockaddr_t *src_addr,
 		       unsigned src_addr_len)
 {
     struct ice_data *id = (struct ice_data*) icest->user_data;

     if (comp_id == 1) {
 	id->rx_rtp_cnt++;
 	pj_memcpy(id->last_rx_rtp_data, pkt, size);
 	id->last_rx_rtp_data[size] = '\0';
     } else if (comp_id == 2) {
 	id->rx_rtcp_cnt++;
 	pj_memcpy(id->last_rx_rtcp_data, pkt, size);
 	id->last_rx_rtcp_data[size] = '\0';
     } else {
 	pj_assert(!"Invalid component ID");
     }

     PJ_UNUSED_ARG(src_addr);
     PJ_UNUSED_ARG(src_addr_len);
 }


 static void handle_events(unsigned msec_timeout)
 {
     pj_time_val delay;

     pj_timer_heap_poll(stun_cfg.timer_heap, NULL);

     delay.sec = 0;
     delay.msec = msec_timeout;
     pj_time_val_normalize(&delay);

     pj_ioqueue_poll(stun_cfg.ioqueue, &delay);
 }


 /* Basic create and destroy test */
 static int ice_basic_create_destroy_test()
 {
     pj_ice_strans *im;
     pj_ice_strans_cb icest_cb;
     pj_status_t status;

     PJ_LOG(3,(THIS_FILE, "...basic create/destroy"));

     pj_bzero(&icest_cb, sizeof(icest_cb));
     icest_cb.on_ice_complete = &on_ice_complete;
     icest_cb.on_rx_data = &on_rx_data;

     status = pj_ice_strans_create(&stun_cfg, "icetest", 2, NULL, &icest_cb, &im);
     if (status != PJ_SUCCESS)
 	return -10;

     pj_ice_strans_destroy(im);

     return 0;
 }


 static pj_status_t start_ice(pj_ice_strans *ist, pj_ice_strans *remote)
 {
     unsigned count;
     pj_ice_sess_cand cand[PJ_ICE_MAX_CAND];
     pj_status_t status;

     count = PJ_ARRAY_SIZE(cand);
     status = pj_ice_strans_enum_cands(remote, &count, cand);
     if (status != PJ_SUCCESS)
 	return status;

     return pj_ice_strans_start_ice(ist, &remote->ice->rx_ufrag, &remote->ice->rx_pass,
 			       count, cand);
 }


 struct dummy_cand
 {
     unsigned		 comp_id;
     pj_ice_cand_type	 type;
     const char		*addr;
     unsigned		 port;
 };

 static int init_ice_st(pj_ice_strans *ice_st,
 		       pj_bool_t add_valid_comp,
 		       unsigned dummy_cnt,
 		       struct dummy_cand cand[])
 {
     pj_str_t a;
     pj_status_t status;
     unsigned i;

     /* Create components */
     for (i=0; i<ice_st->comp_cnt; ++i) {
 	status = pj_ice_strans_create_comp(ice_st, i+1, PJ_ICE_ST_OPT_DONT_ADD_CAND, NULL);
 	if (status != PJ_SUCCESS)
 	    return -21;
     }

     /* Add dummy candidates */
     for (i=0; i<dummy_cnt; ++i) {
 	pj_sockaddr_in addr;

 	pj_sockaddr_in_init(&addr, pj_cstr(&a, cand[i].addr), (pj_uint16_t)cand[i].port);
 	status = pj_ice_strans_add_cand(ice_st, cand[i].comp_id, cand[i].type,
 				    65535, &addr, PJ_FALSE);
 	if (status != PJ_SUCCESS)
 	    return -22;
     }

     /* Add the real candidate */
     if (add_valid_comp) {
 	for (i=0; i<ice_st->comp_cnt; ++i) {
 	    status = pj_ice_strans_add_cand(ice_st, i+1, PJ_ICE_CAND_TYPE_HOST, 65535,
 					&ice_st->comp[i]->local_addr.ipv4, PJ_TRUE);
 	    if (status != PJ_SUCCESS)
 		return -23;
 	}
     }

     return 0;
 }


 /* When ICE completes, both agents should agree on the same candidate pair.
  * Check that the remote address selected by agent1 is equal to the
  * local address of selected by agent 2.
  */
 static int verify_address(pj_ice_strans *agent1, pj_ice_strans *agent2,
 			  unsigned comp_id)
 {
     pj_ice_sess_cand *rcand, *lcand;
     int lcand_id;

     if (agent1->ice->comp[comp_id-1].valid_check == NULL) {
 	PJ_LOG(3,(THIS_FILE, "....error: valid_check not set for comp_id %d", comp_id));
 	return -60;
     }

     /* Get default remote candidate of agent 1 */
     rcand = agent1->ice->comp[comp_id-1].valid_check->rcand;

     /* Get default local candidate of agent 2 */
     pj_ice_sess_find_default_cand(agent2->ice, comp_id, &lcand_id);
     if (lcand_id < 0)
 	return -62;

     lcand = &agent2->ice->lcand[lcand_id];

     if (pj_memcmp(&rcand->addr, &lcand->addr, sizeof(pj_sockaddr_in))!=0) {
 	PJ_LOG(3,(THIS_FILE, "....error: the selected addresses are incorrect for comp_id %d", comp_id));
 	return -64;
     }

     return 0;
 }


 /* Perform ICE test with the following parameters:
  *
  * - title:	The title of the test
  * - ocand_cnt,
  *   ocand	Additional candidates to be added to offerer
  * - acand_cnt,
  *   acand	Additional candidates to be added to answerer
  *
  * The additional candidates are normally invalid candidates, meaning
  * they won't be reachable by the agents. They are used to "confuse"
  * ICE processing.
  */
 static int perform_ice_test(const char *title,
 			    pj_bool_t expected_success,
 			    unsigned comp_cnt,
 			    pj_bool_t add_valid_comp,
 			    unsigned wait_before_send,
 			    unsigned max_total_time,
 			    unsigned ocand_cnt,
 			    struct dummy_cand ocand[],
 			    unsigned acand_cnt,
 			    struct dummy_cand acand[])
 {
     pj_ice_strans *im1, *im2;
     pj_ice_strans_cb icest_cb;
     struct ice_data *id1, *id2;
     pj_timestamp t_start, t_end;
     unsigned i;
     pj_str_t data_from_offerer, data_from_answerer;
     pj_status_t status;

 #define CHECK_COMPLETE()    if (id1->complete && id2->complete) { \
 				if (t_end.u32.lo==0) pj_get_timestamp(&t_end); \
 			    } else {}

     PJ_LOG(3,(THIS_FILE, "...%s", title));

     pj_bzero(&t_end, sizeof(t_end));

     pj_bzero(&icest_cb, sizeof(icest_cb));
     icest_cb.on_ice_complete = &on_ice_complete;
     icest_cb.on_rx_data = &on_rx_data;

     /* Create first ICE */
     status = pj_ice_strans_create(&stun_cfg, "offerer", comp_cnt, NULL, &icest_cb, &im1);
     if (status != PJ_SUCCESS)
 	return -20;

     id1 = PJ_POOL_ZALLOC_T(im1->pool, struct ice_data);
     id1->obj_name = "offerer";
     im1->user_data = id1;

     /* Init components */
     status = init_ice_st(im1, add_valid_comp, ocand_cnt, ocand);
     if (status != 0)
 	return status;

     /* Create second ICE */
     status = pj_ice_strans_create(&stun_cfg, "answerer", comp_cnt, NULL, &icest_cb, &im2);
     if (status != PJ_SUCCESS)
 	return -25;

     id2 = PJ_POOL_ZALLOC_T(im2->pool, struct ice_data);
     id2->obj_name = "answerer";
     im2->user_data = id2;

     /* Init components */
     status = init_ice_st(im2, add_valid_comp, acand_cnt, acand);
     if (status != 0)
 	return status;


     /* Init ICE on im1 */
     status = pj_ice_strans_init_ice(im1, PJ_ICE_SESS_ROLE_CONTROLLING, NULL, NULL);
     if (status != PJ_SUCCESS)
 	return -29;

     /* Init ICE on im2 */
     status = pj_ice_strans_init_ice(im2, PJ_ICE_SESS_ROLE_CONTROLLED, NULL, NULL);
     if (status != PJ_SUCCESS)
 	return -29;

     /* Start ICE on im2 */
     status = start_ice(im2, im1);
     if (status != PJ_SUCCESS) {
 	app_perror("   error starting ICE", status);
 	return -30;
     }

     /* Start ICE on im1 */
     status = start_ice(im1, im2);
     if (status != PJ_SUCCESS)
 	return -35;

     /* Apply delay to let other checks commence */
     pj_thread_sleep(40);

     /* Mark start time */
     pj_get_timestamp(&t_start);

     /* Poll for wait_before_send msecs before we send the first data */
     if (expected_success) {
 	for (;;) {
 	    pj_timestamp t_now;

 	    handle_events(1);

 	    CHECK_COMPLETE();

 	    pj_get_timestamp(&t_now);
 	    if (pj_elapsed_msec(&t_start, &t_now) >= wait_before_send)
 		break;
 	}

 	/* Send data. It must be successful! */
 	data_from_offerer = pj_str("from offerer");
 	status = pj_ice_sess_send_data(im1->ice, 1, data_from_offerer.ptr, data_from_offerer.slen);
 	if (status != PJ_SUCCESS)
 	    return -47;

 	data_from_answerer = pj_str("from answerer");
 	status = pj_ice_sess_send_data(im2->ice, 1, data_from_answerer.ptr, data_from_answerer.slen);
 	if (status != PJ_SUCCESS) {
 	    app_perror("   error sending packet", status);
 	    return -48;
 	}

 	/* Poll to allow data to be received */
 	for (;;) {
 	    pj_timestamp t_now;
 	    handle_events(1);
 	    CHECK_COMPLETE();
 	    pj_get_timestamp(&t_now);
 	    if (pj_elapsed_msec(&t_start, &t_now) >= (wait_before_send + 200))
 		break;
 	}
     }

     /* Just wait until both completes, or timed out */
     while (!id1->complete || !id2->complete) {
 	pj_timestamp t_now;

 	handle_events(1);

 	CHECK_COMPLETE();
 	pj_get_timestamp(&t_now);
 	if (pj_elapsed_msec(&t_start, &t_now) >= max_total_time) {
 	    PJ_LOG(3,(THIS_FILE, "....error: timed-out"));
 	    return -50;
 	}
     }

     /* Mark end-time */
     CHECK_COMPLETE();

     /* If expected to fail, then just check that both fail */
     if (!expected_success) {
 	/* Check status */
 	if (id1->err_code == PJ_SUCCESS)
 	    return -51;
 	if (id2->err_code == PJ_SUCCESS)
 	    return -52;
 	goto on_return;
     }

     /* Check status */
     if (id1->err_code != PJ_SUCCESS)
 	return -53;
     if (id2->err_code != PJ_SUCCESS)
 	return -56;

     /* Verify that offerer gets answerer's transport address */
     for (i=0; i<comp_cnt; ++i) {
 	status = verify_address(im1, im2, i+1);
 	if (status != 0)
 	    return status;
     }

     /* And the other way around */
     for (i=0; i<comp_cnt; ++i) {
 	status = verify_address(im2, im1, i+1);
 	if (status != 0)
 	    return status;
     }

     /* Check that data is received in offerer */
     if (id1->rx_rtp_cnt != 1) {
 	PJ_LOG(3,(THIS_FILE, "....error: data not received in offerer"));
 	return -80;
     }
     if (pj_strcmp2(&data_from_answerer, id1->last_rx_rtp_data) != 0) {
 	PJ_LOG(3,(THIS_FILE, "....error: data mismatch in offerer"));
 	return -82;
     }

     /* And the same in answerer */
     if (id2->rx_rtp_cnt != 1) {
 	PJ_LOG(3,(THIS_FILE, "....error: data not received in answerer"));
 	return -84;
     }
     if (pj_strcmp2(&data_from_offerer, id2->last_rx_rtp_data) != 0) {
 	PJ_LOG(3,(THIS_FILE, "....error: data mismatch in answerer"));
 	return -82;
     }


 on_return:

     /* Done */
     PJ_LOG(3,(THIS_FILE, "....success: ICE completed in %d msec, waiting..",
 	      pj_elapsed_msec(&t_start, &t_end)));

     /* Wait for some more time */
     for (;;) {
 	pj_timestamp t_now;

 	pj_get_timestamp(&t_now);
 	if (pj_elapsed_msec(&t_start, &t_now) > max_total_time)
 	    break;

 	handle_events(1);
     }


     pj_ice_strans_destroy(im1);
     pj_ice_strans_destroy(im2);
     handle_events(100);
     return 0;
 }


 int ice_test(void)
 {
     int rc = 0;
     pj_pool_t *pool;
     pj_ioqueue_t *ioqueue;
     pj_timer_heap_t *timer_heap;
     enum { D1=500, D2=5000, D3=15000 };
     struct dummy_cand ocand[] =
     {
 	{1, PJ_ICE_CAND_TYPE_SRFLX, "127.1.1.1", 65534 },
 	{2, PJ_ICE_CAND_TYPE_SRFLX, "127.1.1.1", 65535 },
     };
     struct dummy_cand acand[] =
     {
 	{1, PJ_ICE_CAND_TYPE_SRFLX, "127.2.2.2", 65534 },
 	{2, PJ_ICE_CAND_TYPE_SRFLX, "127.2.2.2", 65535 },
     };

     pool = pj_pool_create(mem, NULL, 4000, 4000, NULL);
     pj_ioqueue_create(pool, 12, &ioqueue);
     pj_timer_heap_create(pool, 100, &timer_heap);

     pj_stun_config_init(&stun_cfg, mem, 0, ioqueue, timer_heap);

 #if 0
     pj_log_set_level(5);
 #endif

     //goto test;

     /* Basic create/destroy */
     rc = ice_basic_create_destroy_test();
     if (rc != 0)
 	goto on_return;

     /* Direct communication */
     rc = perform_ice_test("Simple test (1 component)", PJ_TRUE, 1, PJ_TRUE, D1, D2, 0, NULL, 0, NULL);
     if (rc != 0)
 	goto on_return;

     /* Failure case (all checks fail) */
 #if 0
     /* Cannot just add an SRFLX candidate; it needs a base */
     rc = perform_ice_test("Failure case (all checks fail)", PJ_FALSE, 1, PJ_FALSE, D3, D3, 1, ocand, 1, acand);
     if (rc != 0)
 	goto on_return;
 #endif

     /* Direct communication with invalid address */
     rc = perform_ice_test("With 1 unreachable address", PJ_TRUE, 1, PJ_TRUE, D1, D2, 1, ocand, 0, NULL);
     if (rc != 0)
 	goto on_return;

     /* Direct communication with invalid address */
     rc = perform_ice_test("With 2 unreachable addresses (one each)", PJ_TRUE, 1, PJ_TRUE, D1, D2, 1, ocand, 1, acand);
     if (rc != 0)
 	goto on_return;

     /* Direct communication with two components */
 //test:
     rc = perform_ice_test("With two components (RTP and RTCP)", PJ_TRUE, 2, PJ_TRUE, D1, D2, 0, NULL, 0, NULL);
     if (rc != 0)
 	goto on_return;

     goto on_return;

     /* Direct communication with mismatch number of components */

     /* Direct communication with 2 components and 2 invalid address */
     rc = perform_ice_test("With 2 two components and 2 unreachable address", PJ_TRUE, 2, PJ_TRUE, D1, D2, 1, ocand, 1, acand);
     if (rc != 0)
 	goto on_return;


 on_return:
     pj_log_set_level(3);
     pj_ioqueue_destroy(stun_cfg.ioqueue);
     pj_pool_release(pool);
     return rc;
 }
	/* $Id$ */
	/*
	* Copyright (C) 2003-2007 Benny Prijono <benny@prijono.org>
	*
	* This program is free software; you can redistribute it and/or modify
	* it under the terms of the GNU General Public License as published by
	* the Free Software Foundation; either version 2 of the License, or
	* (at your option) any later version.
	*
	* This program is distributed in the hope that it will be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	* GNU General Public License for more details.
	*
	* You should have received a copy of the GNU General Public License
	* along with this program; if not, write to the Free Software
	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	*/
	#include "test.h"

	#define THIS_FILE "ice_test.c"


	struct ice_data
	{
	const char *obj_name;
	pj_bool_t complete;
	pj_status_t err_code;
	unsigned rx_rtp_cnt;
	unsigned rx_rtcp_cnt;

	unsigned rx_rtp_count;
	char last_rx_rtp_data[32];
	unsigned rx_rtcp_count;
	char last_rx_rtcp_data[32];
	};

	static pj_stun_config stun_cfg;

	static void on_ice_complete(pj_ice_strans *icest,
	pj_status_t status)
	{
	struct ice_data id = (struct ice_data) icest->user_data;
	id->complete = PJ_TRUE;
	id->err_code = status;
	PJ_LOG(3,(THIS_FILE, " ICE %s complete %s", id->obj_name,
	(status==PJ_SUCCESS ? "successfully" : "with failure")));
	}


	static void on_rx_data(pj_ice_strans *icest, unsigned comp_id,
	void *pkt, pj_size_t size,
	const pj_sockaddr_t *src_addr,
	unsigned src_addr_len)
	{
	struct ice_data id = (struct ice_data) icest->user_data;

	if (comp_id == 1) {
	id->rx_rtp_cnt++;
	pj_memcpy(id->last_rx_rtp_data, pkt, size);
	id->last_rx_rtp_data[size] = '\0';
	} else if (comp_id == 2) {
	id->rx_rtcp_cnt++;
	pj_memcpy(id->last_rx_rtcp_data, pkt, size);
	id->last_rx_rtcp_data[size] = '\0';
	} else {
	pj_assert(!"Invalid component ID");
	}

	PJ_UNUSED_ARG(src_addr);
	PJ_UNUSED_ARG(src_addr_len);
	}


	static void handle_events(unsigned msec_timeout)
	{
	pj_time_val delay;

	pj_timer_heap_poll(stun_cfg.timer_heap, NULL);

	delay.sec = 0;
	delay.msec = msec_timeout;
	pj_time_val_normalize(&delay);

	pj_ioqueue_poll(stun_cfg.ioqueue, &delay);
	}


	/* Basic create and destroy test */
	static int ice_basic_create_destroy_test()
	{
	pj_ice_strans *im;
	pj_ice_strans_cb icest_cb;
	pj_status_t status;

	PJ_LOG(3,(THIS_FILE, "...basic create/destroy"));

	pj_bzero(&icest_cb, sizeof(icest_cb));
	icest_cb.on_ice_complete = &on_ice_complete;
	icest_cb.on_rx_data = &on_rx_data;

	status = pj_ice_strans_create(&stun_cfg, "icetest", 2, NULL, &icest_cb, &im);
	if (status != PJ_SUCCESS)
	return -10;

	pj_ice_strans_destroy(im);

	return 0;
	}


	static pj_status_t start_ice(pj_ice_strans ist, pj_ice_strans remote)
	{
	unsigned count;
	pj_ice_sess_cand cand[PJ_ICE_MAX_CAND];
	pj_status_t status;

	count = PJ_ARRAY_SIZE(cand);
	status = pj_ice_strans_enum_cands(remote, &count, cand);
	if (status != PJ_SUCCESS)
	return status;

	return pj_ice_strans_start_ice(ist, &remote->ice->rx_ufrag, &remote->ice->rx_pass,
	count, cand);
	}


	struct dummy_cand
	{
	unsigned comp_id;
	pj_ice_cand_type type;
	const char *addr;
	unsigned port;
	};

	static int init_ice_st(pj_ice_strans *ice_st,
	pj_bool_t add_valid_comp,
	unsigned dummy_cnt,
	struct dummy_cand cand[])
	{
	pj_str_t a;
	pj_status_t status;
	unsigned i;

	/* Create components */
	for (i=0; i<ice_st->comp_cnt; ++i) {
	status = pj_ice_strans_create_comp(ice_st, i+1, PJ_ICE_ST_OPT_DONT_ADD_CAND, NULL);
	if (status != PJ_SUCCESS)
	return -21;
	}

	/* Add dummy candidates */
	for (i=0; i<dummy_cnt; ++i) {
	pj_sockaddr_in addr;

	pj_sockaddr_in_init(&addr, pj_cstr(&a, cand[i].addr), (pj_uint16_t)cand[i].port);
	status = pj_ice_strans_add_cand(ice_st, cand[i].comp_id, cand[i].type,
	65535, &addr, PJ_FALSE);
	if (status != PJ_SUCCESS)
	return -22;
	}

	/* Add the real candidate */
	if (add_valid_comp) {
	for (i=0; i<ice_st->comp_cnt; ++i) {
	status = pj_ice_strans_add_cand(ice_st, i+1, PJ_ICE_CAND_TYPE_HOST, 65535,
	&ice_st->comp[i]->local_addr.ipv4, PJ_TRUE);
	if (status != PJ_SUCCESS)
	return -23;
	}
	}

	return 0;
	}


	/* When ICE completes, both agents should agree on the same candidate pair.
	* Check that the remote address selected by agent1 is equal to the
	* local address of selected by agent 2.
	*/
	static int verify_address(pj_ice_strans agent1, pj_ice_strans agent2,
	unsigned comp_id)
	{
	pj_ice_sess_cand rcand, lcand;
	int lcand_id;

	if (agent1->ice->comp[comp_id-1].valid_check == NULL) {
	PJ_LOG(3,(THIS_FILE, "....error: valid_check not set for comp_id %d", comp_id));
	return -60;
	}

	/* Get default remote candidate of agent 1 */
	rcand = agent1->ice->comp[comp_id-1].valid_check->rcand;

	/* Get default local candidate of agent 2 */
	pj_ice_sess_find_default_cand(agent2->ice, comp_id, &lcand_id);
	if (lcand_id < 0)
	return -62;

	lcand = &agent2->ice->lcand[lcand_id];

	if (pj_memcmp(&rcand->addr, &lcand->addr, sizeof(pj_sockaddr_in))!=0) {
	PJ_LOG(3,(THIS_FILE, "....error: the selected addresses are incorrect for comp_id %d", comp_id));
	return -64;
	}

	return 0;
	}


	/* Perform ICE test with the following parameters:
	*
	* - title: The title of the test
	* - ocand_cnt,
	* ocand Additional candidates to be added to offerer
	* - acand_cnt,
	* acand Additional candidates to be added to answerer
	*
	* The additional candidates are normally invalid candidates, meaning
	* they won't be reachable by the agents. They are used to "confuse"
	* ICE processing.
	*/
	static int perform_ice_test(const char *title,
	pj_bool_t expected_success,
	unsigned comp_cnt,
	pj_bool_t add_valid_comp,
	unsigned wait_before_send,
	unsigned max_total_time,
	unsigned ocand_cnt,
	struct dummy_cand ocand[],
	unsigned acand_cnt,
	struct dummy_cand acand[])
	{
	pj_ice_strans im1, im2;
	pj_ice_strans_cb icest_cb;
	struct ice_data id1, id2;
	pj_timestamp t_start, t_end;
	unsigned i;
	pj_str_t data_from_offerer, data_from_answerer;
	pj_status_t status;

	#define CHECK_COMPLETE() if (id1->complete && id2->complete) { \
	if (t_end.u32.lo==0) pj_get_timestamp(&t_end); \
	} else {}

	PJ_LOG(3,(THIS_FILE, "...%s", title));

	pj_bzero(&t_end, sizeof(t_end));

	pj_bzero(&icest_cb, sizeof(icest_cb));
	icest_cb.on_ice_complete = &on_ice_complete;
	icest_cb.on_rx_data = &on_rx_data;

	/* Create first ICE */
	status = pj_ice_strans_create(&stun_cfg, "offerer", comp_cnt, NULL, &icest_cb, &im1);
	if (status != PJ_SUCCESS)
	return -20;

	id1 = PJ_POOL_ZALLOC_T(im1->pool, struct ice_data);
	id1->obj_name = "offerer";
	im1->user_data = id1;

	/* Init components */
	status = init_ice_st(im1, add_valid_comp, ocand_cnt, ocand);
	if (status != 0)
	return status;

	/* Create second ICE */
	status = pj_ice_strans_create(&stun_cfg, "answerer", comp_cnt, NULL, &icest_cb, &im2);
	if (status != PJ_SUCCESS)
	return -25;

	id2 = PJ_POOL_ZALLOC_T(im2->pool, struct ice_data);
	id2->obj_name = "answerer";
	im2->user_data = id2;

	/* Init components */
	status = init_ice_st(im2, add_valid_comp, acand_cnt, acand);
	if (status != 0)
	return status;


	/* Init ICE on im1 */
	status = pj_ice_strans_init_ice(im1, PJ_ICE_SESS_ROLE_CONTROLLING, NULL, NULL);
	if (status != PJ_SUCCESS)
	return -29;

	/* Init ICE on im2 */
	status = pj_ice_strans_init_ice(im2, PJ_ICE_SESS_ROLE_CONTROLLED, NULL, NULL);
	if (status != PJ_SUCCESS)
	return -29;

	/* Start ICE on im2 */
	status = start_ice(im2, im1);
	if (status != PJ_SUCCESS) {
	app_perror(" error starting ICE", status);
	return -30;
	}

	/* Start ICE on im1 */
	status = start_ice(im1, im2);
	if (status != PJ_SUCCESS)
	return -35;

	/* Apply delay to let other checks commence */
	pj_thread_sleep(40);

	/* Mark start time */
	pj_get_timestamp(&t_start);

	/* Poll for wait_before_send msecs before we send the first data */
	if (expected_success) {
	for (;;) {
	pj_timestamp t_now;

	handle_events(1);

	CHECK_COMPLETE();

	pj_get_timestamp(&t_now);
	if (pj_elapsed_msec(&t_start, &t_now) >= wait_before_send)
	break;
	}

	/* Send data. It must be successful! */
	data_from_offerer = pj_str("from offerer");
	status = pj_ice_sess_send_data(im1->ice, 1, data_from_offerer.ptr, data_from_offerer.slen);
	if (status != PJ_SUCCESS)
	return -47;

	data_from_answerer = pj_str("from answerer");
	status = pj_ice_sess_send_data(im2->ice, 1, data_from_answerer.ptr, data_from_answerer.slen);
	if (status != PJ_SUCCESS) {
	app_perror(" error sending packet", status);
	return -48;
	}

	/* Poll to allow data to be received */
	for (;;) {
	pj_timestamp t_now;
	handle_events(1);
	CHECK_COMPLETE();
	pj_get_timestamp(&t_now);
	if (pj_elapsed_msec(&t_start, &t_now) >= (wait_before_send + 200))
	break;
	}
	}

	/* Just wait until both completes, or timed out */
	while (!id1->complete \|\| !id2->complete) {
	pj_timestamp t_now;

	handle_events(1);

	CHECK_COMPLETE();
	pj_get_timestamp(&t_now);
	if (pj_elapsed_msec(&t_start, &t_now) >= max_total_time) {
	PJ_LOG(3,(THIS_FILE, "....error: timed-out"));
	return -50;
	}
	}

	/* Mark end-time */
	CHECK_COMPLETE();

	/* If expected to fail, then just check that both fail */
	if (!expected_success) {
	/* Check status */
	if (id1->err_code == PJ_SUCCESS)
	return -51;
	if (id2->err_code == PJ_SUCCESS)
	return -52;
	goto on_return;
	}

	/* Check status */
	if (id1->err_code != PJ_SUCCESS)
	return -53;
	if (id2->err_code != PJ_SUCCESS)
	return -56;

	/* Verify that offerer gets answerer's transport address */
	for (i=0; i<comp_cnt; ++i) {
	status = verify_address(im1, im2, i+1);
	if (status != 0)
	return status;
	}

	/* And the other way around */
	for (i=0; i<comp_cnt; ++i) {
	status = verify_address(im2, im1, i+1);
	if (status != 0)
	return status;
	}

	/* Check that data is received in offerer */
	if (id1->rx_rtp_cnt != 1) {
	PJ_LOG(3,(THIS_FILE, "....error: data not received in offerer"));
	return -80;
	}
	if (pj_strcmp2(&data_from_answerer, id1->last_rx_rtp_data) != 0) {
	PJ_LOG(3,(THIS_FILE, "....error: data mismatch in offerer"));
	return -82;
	}

	/* And the same in answerer */
	if (id2->rx_rtp_cnt != 1) {
	PJ_LOG(3,(THIS_FILE, "....error: data not received in answerer"));
	return -84;
	}
	if (pj_strcmp2(&data_from_offerer, id2->last_rx_rtp_data) != 0) {
	PJ_LOG(3,(THIS_FILE, "....error: data mismatch in answerer"));
	return -82;
	}


	on_return:

	/* Done */
	PJ_LOG(3,(THIS_FILE, "....success: ICE completed in %d msec, waiting..",
	pj_elapsed_msec(&t_start, &t_end)));

	/* Wait for some more time */
	for (;;) {
	pj_timestamp t_now;

	pj_get_timestamp(&t_now);
	if (pj_elapsed_msec(&t_start, &t_now) > max_total_time)
	break;

	handle_events(1);
	}


	pj_ice_strans_destroy(im1);
	pj_ice_strans_destroy(im2);
	handle_events(100);
	return 0;
	}


	int ice_test(void)
	{
	int rc = 0;
	pj_pool_t *pool;
	pj_ioqueue_t *ioqueue;
	pj_timer_heap_t *timer_heap;
	enum { D1=500, D2=5000, D3=15000 };
	struct dummy_cand ocand[] =
	{
	{1, PJ_ICE_CAND_TYPE_SRFLX, "127.1.1.1", 65534 },
	{2, PJ_ICE_CAND_TYPE_SRFLX, "127.1.1.1", 65535 },
	};
	struct dummy_cand acand[] =
	{
	{1, PJ_ICE_CAND_TYPE_SRFLX, "127.2.2.2", 65534 },
	{2, PJ_ICE_CAND_TYPE_SRFLX, "127.2.2.2", 65535 },
	};

	pool = pj_pool_create(mem, NULL, 4000, 4000, NULL);
	pj_ioqueue_create(pool, 12, &ioqueue);
	pj_timer_heap_create(pool, 100, &timer_heap);

	pj_stun_config_init(&stun_cfg, mem, 0, ioqueue, timer_heap);

	#if 0
	pj_log_set_level(5);
	#endif

	//goto test;

	/* Basic create/destroy */
	rc = ice_basic_create_destroy_test();
	if (rc != 0)
	goto on_return;

	/* Direct communication */
	rc = perform_ice_test("Simple test (1 component)", PJ_TRUE, 1, PJ_TRUE, D1, D2, 0, NULL, 0, NULL);
	if (rc != 0)
	goto on_return;

	/* Failure case (all checks fail) */
	#if 0
	/* Cannot just add an SRFLX candidate; it needs a base */
	rc = perform_ice_test("Failure case (all checks fail)", PJ_FALSE, 1, PJ_FALSE, D3, D3, 1, ocand, 1, acand);
	if (rc != 0)
	goto on_return;
	#endif

	/* Direct communication with invalid address */
	rc = perform_ice_test("With 1 unreachable address", PJ_TRUE, 1, PJ_TRUE, D1, D2, 1, ocand, 0, NULL);
	if (rc != 0)
	goto on_return;

	/* Direct communication with invalid address */
	rc = perform_ice_test("With 2 unreachable addresses (one each)", PJ_TRUE, 1, PJ_TRUE, D1, D2, 1, ocand, 1, acand);
	if (rc != 0)
	goto on_return;

	/* Direct communication with two components */
	//test:
	rc = perform_ice_test("With two components (RTP and RTCP)", PJ_TRUE, 2, PJ_TRUE, D1, D2, 0, NULL, 0, NULL);
	if (rc != 0)
	goto on_return;

	goto on_return;

	/* Direct communication with mismatch number of components */

	/* Direct communication with 2 components and 2 invalid address */
	rc = perform_ice_test("With 2 two components and 2 unreachable address", PJ_TRUE, 2, PJ_TRUE, D1, D2, 1, ocand, 1, acand);
	if (rc != 0)
	goto on_return;



	on_return:
	pj_log_set_level(3);
	pj_ioqueue_destroy(stun_cfg.ioqueue);
	pj_pool_release(pool);
	return rc;
	}