freeswitch/libs/freetdm/src/ftmod/ftmod_libpri/ftmod_libpri.c

/*
 * Copyright (c) 2007, Anthony Minessale II
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 
 * * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 * 
 * * Redistributions in binary form must reproduce the above copyright
 * notice, this list of conditions and the following disclaimer in the
 * documentation and/or other materials provided with the distribution.
 * 
 * * Neither the name of the original author; nor the names of any contributors
 * may be used to endorse or promote products derived from this software
 * without specific prior written permission.
 * 
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER
 * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include "freetdm.h"
#include "ftmod_libpri.h"

/**
 * \brief Unloads libpri IO module
 * \return Success
 */
static FIO_IO_UNLOAD_FUNCTION(ftdm_libpri_unload)
{
	return FTDM_SUCCESS;
}

/**
 * \brief Starts a libpri channel (outgoing call)
 * \param ftdmchan Channel to initiate call on
 * \return Success or failure
 */
static FIO_CHANNEL_OUTGOING_CALL_FUNCTION(isdn_outgoing_call)
{
	ftdm_status_t status = FTDM_SUCCESS;
	ftdm_set_flag(ftdmchan, FTDM_CHANNEL_OUTBOUND);
	ftdm_set_state_locked(ftdmchan, FTDM_CHANNEL_STATE_DIALING);
	return status;
}

/**
 * \brief Requests an libpri channel on a span (outgoing call)
 * \param span Span where to get a channel (unused)
 * \param chan_id Specific channel to get (0 for any) (unused)
 * \param direction Call direction (unused)
 * \param caller_data Caller information (unused)
 * \param ftdmchan Channel to initialise (unused)
 * \return Failure
 */
static FIO_CHANNEL_REQUEST_FUNCTION(isdn_channel_request)
{
	return FTDM_FAIL;
}

#ifdef WIN32
/**
 * \brief Logs a libpri error
 * \param s Error string
 */
static void s_pri_error(char *s)
#else
/**
 * \brief Logs a libpri error
 * \param pri libpri structure (unused)
 * \param s Error string
 */
static void s_pri_error(struct pri *pri, char *s)
#endif
{
	ftdm_log(FTDM_LOG_ERROR, "%s", s);
}

#ifdef WIN32
/**
 * \brief Logs a libpri message
 * \param s Message string
 */
static void s_pri_message(char *s)
#else
/**
 * \brief Logs a libpri message
 * \param pri libpri structure (unused)
 * \param s Message string
 */
static void s_pri_message(struct pri *pri, char *s)
#endif
{
		ftdm_log(FTDM_LOG_DEBUG, "%s", s);
}

/**
 * \brief Parses an option string to flags
 * \param in String to parse for configuration options
 * \return Flags
 */
static uint32_t parse_opts(const char *in)
{
	uint32_t flags = 0;
	
	if (!in) {
		return 0;
	}
	
	if (strstr(in, "suggest_channel")) {
		flags |= FTMOD_LIBPRI_OPT_SUGGEST_CHANNEL;
	}
	
	if (strstr(in, "omit_display")) {
		flags |= FTMOD_LIBPRI_OPT_OMIT_DISPLAY_IE;
	}
	
	if (strstr(in, "omit_redirecting_number")) {
		flags |= FTMOD_LIBPRI_OPT_OMIT_REDIRECTING_NUMBER_IE;
	}

	return flags;
}

/**
 * \brief Parses a debug string to flags
 * \param in Debug string to parse for
 * \return Flags
 */
static int parse_debug(const char *in)
{
	int flags = 0;

	if (!in) {
		return 0;
	}

	if (strstr(in, "q921_raw")) {
		flags |= PRI_DEBUG_Q921_RAW;
	}

	if (strstr(in, "q921_dump")) {
		flags |= PRI_DEBUG_Q921_DUMP;
	}

	if (strstr(in, "q921_state")) {
		flags |= PRI_DEBUG_Q921_STATE;
	}

	if (strstr(in, "config")) {
		flags |= PRI_DEBUG_CONFIG;
	}

	if (strstr(in, "q931_dump")) {
		flags |= PRI_DEBUG_Q931_DUMP;
	}

	if (strstr(in, "q931_state")) {
		flags |= PRI_DEBUG_Q931_STATE;
	}

	if (strstr(in, "q931_anomaly")) {
		flags |= PRI_DEBUG_Q931_ANOMALY;
	}

	if (strstr(in, "apdu")) {
		flags |= PRI_DEBUG_APDU;
	}

	if (strstr(in, "aoc")) {
		flags |= PRI_DEBUG_AOC;
	}

	if (strstr(in, "all")) {
		flags |= PRI_DEBUG_ALL;
	}

	if (strstr(in, "none")) {
		flags = 0;
	}

	return flags;
}

static ftdm_io_interface_t ftdm_libpri_interface;

static ftdm_status_t ftdm_libpri_start(ftdm_span_t *span);

/**
 * \brief API function to kill or debug a libpri span
 * \param stream API stream handler
 * \param data String containing argurments
 * \return Flags
 */
static FIO_API_FUNCTION(ftdm_libpri_api)
{
	char *mycmd = NULL, *argv[10] = { 0 };
    int argc = 0;
	
	if (data) {
		mycmd = ftdm_strdup(data);
		argc = ftdm_separate_string(mycmd, ' ', argv, (sizeof(argv) / sizeof(argv[0])));
	}

	if (argc == 2) {
		if (!strcasecmp(argv[0], "kill")) {
			int span_id = atoi(argv[1]);
			ftdm_span_t *span = NULL;

			if (ftdm_span_find_by_name(argv[1], &span) == FTDM_SUCCESS || ftdm_span_find(span_id, &span) == FTDM_SUCCESS) {
				ftdm_libpri_data_t *isdn_data = span->signal_data;

				if (span->start != ftdm_libpri_start) {
					stream->write_function(stream, "%s: -ERR invalid span.\n", __FILE__);
					goto done;
				}

				ftdm_clear_flag((&isdn_data->spri), LPWRAP_PRI_READY);
				stream->write_function(stream, "%s: +OK killed.\n", __FILE__);
				goto done;
			} else {
				stream->write_function(stream, "%s: -ERR invalid span.\n", __FILE__);
				goto done;
			}
		}
	}

	if (argc > 2) {
		if (!strcasecmp(argv[0], "debug")) {
			ftdm_span_t *span = NULL;

			if (ftdm_span_find_by_name(argv[1], &span) == FTDM_SUCCESS) {
				ftdm_libpri_data_t *isdn_data = span->signal_data;
				if (span->start != ftdm_libpri_start) {
					stream->write_function(stream, "%s: -ERR invalid span.\n", __FILE__);
					goto done;
				}

				pri_set_debug(isdn_data->spri.pri, parse_debug(argv[2]));				
				stream->write_function(stream, "%s: +OK debug set.\n", __FILE__);
				goto done;
			} else {
				stream->write_function(stream, "%s: -ERR invalid span.\n", __FILE__);
				goto done;
			}
		}

	}

	stream->write_function(stream, "%s: -ERR invalid command.\n", __FILE__);
	
 done:

	ftdm_safe_free(mycmd);

	return FTDM_SUCCESS;
}

/**
 * \brief Loads libpri IO module
 * \param fio FreeTDM IO interface
 * \return Success
 */
static FIO_IO_LOAD_FUNCTION(ftdm_libpri_io_init)
{
	assert(fio != NULL);
	memset(&ftdm_libpri_interface, 0, sizeof(ftdm_libpri_interface));

	ftdm_libpri_interface.name = "libpri";
	ftdm_libpri_interface.api = ftdm_libpri_api;

	*fio = &ftdm_libpri_interface;

	return FTDM_SUCCESS;
}

/**
 * \brief Loads libpri signaling module
 * \param fio FreeTDM IO interface
 * \return Success
 */
static FIO_SIG_LOAD_FUNCTION(ftdm_libpri_init)
{
	pri_set_error(s_pri_error);
	pri_set_message(s_pri_message);
	return FTDM_SUCCESS;
}

/**
 * \brief libpri state map
 */
static ftdm_state_map_t isdn_state_map = {
	{
		{
			ZSD_OUTBOUND,
			ZSM_UNACCEPTABLE,
			{FTDM_ANY_STATE},
			{FTDM_CHANNEL_STATE_RESTART, FTDM_END}
		},
		{
			ZSD_OUTBOUND,
			ZSM_UNACCEPTABLE,
			{FTDM_CHANNEL_STATE_RESTART, FTDM_END},
			{FTDM_CHANNEL_STATE_DOWN, FTDM_END}
		},
		{
			ZSD_OUTBOUND,
			ZSM_UNACCEPTABLE,
			{FTDM_CHANNEL_STATE_DOWN, FTDM_END},
			{FTDM_CHANNEL_STATE_DIALING, FTDM_END}
		},
		{
			ZSD_OUTBOUND,
			ZSM_UNACCEPTABLE,
			{FTDM_CHANNEL_STATE_DIALING, FTDM_END},
			{FTDM_CHANNEL_STATE_PROGRESS_MEDIA, FTDM_CHANNEL_STATE_PROGRESS, FTDM_CHANNEL_STATE_UP, FTDM_CHANNEL_STATE_HANGUP, FTDM_CHANNEL_STATE_TERMINATING, FTDM_END}
		},
		{
			ZSD_OUTBOUND,
			ZSM_UNACCEPTABLE,
			{FTDM_CHANNEL_STATE_PROGRESS_MEDIA, FTDM_CHANNEL_STATE_PROGRESS, FTDM_END},
			{FTDM_CHANNEL_STATE_HANGUP, FTDM_CHANNEL_STATE_PROGRESS_MEDIA, FTDM_CHANNEL_STATE_TERMINATING, FTDM_CHANNEL_STATE_UP, FTDM_END}
		},
		{
			ZSD_OUTBOUND,
			ZSM_UNACCEPTABLE,
			{FTDM_CHANNEL_STATE_HANGUP, FTDM_CHANNEL_STATE_TERMINATING, FTDM_END},
			{FTDM_CHANNEL_STATE_HANGUP_COMPLETE, FTDM_CHANNEL_STATE_DOWN, FTDM_END}
		},
		{
			ZSD_OUTBOUND,
			ZSM_UNACCEPTABLE,
			{FTDM_CHANNEL_STATE_HANGUP_COMPLETE, FTDM_END},
			{FTDM_CHANNEL_STATE_DOWN, FTDM_END},
		},
		{
			ZSD_OUTBOUND,
			ZSM_UNACCEPTABLE,
			{FTDM_CHANNEL_STATE_UP, FTDM_END},
			{FTDM_CHANNEL_STATE_HANGUP, FTDM_CHANNEL_STATE_TERMINATING, FTDM_END}
		},

		/****************************************/
		{
			ZSD_INBOUND,
			ZSM_UNACCEPTABLE,
			{FTDM_ANY_STATE},
			{FTDM_CHANNEL_STATE_RESTART, FTDM_END}
		},
		{
			ZSD_INBOUND,
			ZSM_UNACCEPTABLE,
			{FTDM_CHANNEL_STATE_RESTART, FTDM_END},
			{FTDM_CHANNEL_STATE_DOWN, FTDM_END}
		},
		{
			ZSD_INBOUND,
			ZSM_UNACCEPTABLE,
			{FTDM_CHANNEL_STATE_DOWN, FTDM_END},
			{FTDM_CHANNEL_STATE_DIALTONE, FTDM_CHANNEL_STATE_RING, FTDM_END}
		},
		{
			ZSD_INBOUND,
			ZSM_UNACCEPTABLE,
			{FTDM_CHANNEL_STATE_DIALTONE, FTDM_END},
			{FTDM_CHANNEL_STATE_RING, FTDM_CHANNEL_STATE_HANGUP, FTDM_CHANNEL_STATE_TERMINATING, FTDM_END}
		},
		{
			ZSD_INBOUND,
			ZSM_UNACCEPTABLE,
			{FTDM_CHANNEL_STATE_RING, FTDM_END},
			{FTDM_CHANNEL_STATE_HANGUP, FTDM_CHANNEL_STATE_TERMINATING, FTDM_CHANNEL_STATE_PROGRESS, FTDM_CHANNEL_STATE_PROGRESS_MEDIA, FTDM_CHANNEL_STATE_UP, FTDM_END}
		},
		{
			ZSD_INBOUND,
			ZSM_UNACCEPTABLE,
			{FTDM_CHANNEL_STATE_HANGUP, FTDM_CHANNEL_STATE_TERMINATING, FTDM_END},
			{FTDM_CHANNEL_STATE_HANGUP_COMPLETE, FTDM_CHANNEL_STATE_DOWN, FTDM_END},
		},
		{
			ZSD_INBOUND,
			ZSM_UNACCEPTABLE,
			{FTDM_CHANNEL_STATE_HANGUP_COMPLETE, FTDM_END},
			{FTDM_CHANNEL_STATE_DOWN, FTDM_END},
		},
		{
			ZSD_INBOUND,
			ZSM_UNACCEPTABLE,
			{FTDM_CHANNEL_STATE_PROGRESS, FTDM_CHANNEL_STATE_PROGRESS_MEDIA, FTDM_END},
			{FTDM_CHANNEL_STATE_HANGUP, FTDM_CHANNEL_STATE_TERMINATING, FTDM_CHANNEL_STATE_PROGRESS_MEDIA, 
			 FTDM_CHANNEL_STATE_CANCEL, FTDM_CHANNEL_STATE_UP, FTDM_END},
		},
		{
			ZSD_INBOUND,
			ZSM_UNACCEPTABLE,
			{FTDM_CHANNEL_STATE_UP, FTDM_END},
			{FTDM_CHANNEL_STATE_HANGUP, FTDM_CHANNEL_STATE_TERMINATING, FTDM_END},
		},
		

	}
};

/**
 * \brief Handler for channel state change
 * \param ftdmchan Channel to handle
 */
static __inline__ void state_advance(ftdm_channel_t *ftdmchan)
{
	//Q931mes_Generic *gen = (Q931mes_Generic *) ftdmchan->caller_data.raw_data;
	ftdm_libpri_data_t *isdn_data = ftdmchan->span->signal_data;
	ftdm_status_t status;
	ftdm_sigmsg_t sig;
	q931_call *call = (q931_call *) ftdmchan->call_data;
	
	
	ftdm_log(FTDM_LOG_DEBUG, "%d:%d STATE [%s]\n", 
			ftdmchan->span_id, ftdmchan->chan_id, ftdm_channel_state2str(ftdmchan->state));


#if 0
	if (!ftdm_test_flag(ftdmchan, FTDM_CHANNEL_OUTBOUND) && !call) {
		ftdm_log(FTDM_LOG_WARNING, "NO CALL!!!!\n");
	}
#endif

	
	memset(&sig, 0, sizeof(sig));
	sig.chan_id = ftdmchan->chan_id;
	sig.span_id = ftdmchan->span_id;
	sig.channel = ftdmchan;


	switch (ftdmchan->state) {
	case FTDM_CHANNEL_STATE_DOWN:
		{
			ftdmchan->call_data = NULL;
			ftdm_channel_done(ftdmchan);			
		}
		break;
	case FTDM_CHANNEL_STATE_PROGRESS:
		{
			if (ftdm_test_flag(ftdmchan, FTDM_CHANNEL_OUTBOUND)) {
				sig.event_id = FTDM_SIGEVENT_PROGRESS;
				if ((status = ftdm_span_send_signal(ftdmchan->span, &sig) != FTDM_SUCCESS)) {
					ftdm_set_state_locked(ftdmchan, FTDM_CHANNEL_STATE_HANGUP);
				}
			} else if (call) {
				pri_progress(isdn_data->spri.pri, call, ftdmchan->chan_id, 1);
			} else {
				ftdm_set_state_locked(ftdmchan, FTDM_CHANNEL_STATE_RESTART);
			}
		}
		break;
	case FTDM_CHANNEL_STATE_PROGRESS_MEDIA:
		{
			if (ftdm_test_flag(ftdmchan, FTDM_CHANNEL_OUTBOUND)) {
				sig.event_id = FTDM_SIGEVENT_PROGRESS_MEDIA;
				if ((status = ftdm_span_send_signal(ftdmchan->span, &sig) != FTDM_SUCCESS)) {
					ftdm_set_state_locked(ftdmchan, FTDM_CHANNEL_STATE_HANGUP);
				}
			} else if (call) {
				pri_proceeding(isdn_data->spri.pri, call, ftdmchan->chan_id, 1);
			} else {
				ftdm_set_state_locked(ftdmchan, FTDM_CHANNEL_STATE_RESTART);
			}
		}
		break;
	case FTDM_CHANNEL_STATE_RING:
		{
			if (!ftdm_test_flag(ftdmchan, FTDM_CHANNEL_OUTBOUND)) {
				if (call) {
					pri_acknowledge(isdn_data->spri.pri, call, ftdmchan->chan_id, 0);
					sig.event_id = FTDM_SIGEVENT_START;
					if ((status = ftdm_span_send_signal(ftdmchan->span, &sig) != FTDM_SUCCESS)) {
						ftdm_set_state_locked(ftdmchan, FTDM_CHANNEL_STATE_HANGUP);
					}
				} else {
					ftdm_set_state_locked(ftdmchan, FTDM_CHANNEL_STATE_RESTART);
				}
			}
		}
		break;
	case FTDM_CHANNEL_STATE_RESTART:
		{
			ftdmchan->caller_data.hangup_cause = FTDM_CAUSE_NORMAL_UNSPECIFIED;
			sig.event_id = FTDM_SIGEVENT_RESTART;
			status = ftdm_span_send_signal(ftdmchan->span, &sig);
			ftdm_set_state_locked(ftdmchan, FTDM_CHANNEL_STATE_DOWN);
		}
		break;
	case FTDM_CHANNEL_STATE_UP:
		{
			if (ftdm_test_flag(ftdmchan, FTDM_CHANNEL_OUTBOUND)) {
				sig.event_id = FTDM_SIGEVENT_UP;
				if ((status = ftdm_span_send_signal(ftdmchan->span, &sig) != FTDM_SUCCESS)) {
					ftdm_set_state_locked(ftdmchan, FTDM_CHANNEL_STATE_HANGUP);
				}
			} else if (call) {
				pri_answer(isdn_data->spri.pri, call, 0, 1);
			} else {
				ftdm_set_state_locked(ftdmchan, FTDM_CHANNEL_STATE_RESTART);
			}
		}
		break;
	case FTDM_CHANNEL_STATE_DIALING:
		if (isdn_data) {
			struct pri_sr *sr;
			int dp;

			if (!(call = pri_new_call(isdn_data->spri.pri))) {
				ftdm_set_state_locked(ftdmchan, FTDM_CHANNEL_STATE_RESTART);
				return;
			}

			
			dp = ftdmchan->caller_data.dnis.type;
			switch(dp) {
			case FTDM_TON_NATIONAL:
				dp = PRI_NATIONAL_ISDN;
				break;
			case FTDM_TON_INTERNATIONAL:
				dp = PRI_INTERNATIONAL_ISDN;
				break;
			case FTDM_TON_SUBSCRIBER_NUMBER:
				dp = PRI_LOCAL_ISDN;
				break;
			default:
				dp = isdn_data->dp;
			}

			ftdmchan->call_data = call;
			sr = pri_sr_new();
			assert(sr);
			pri_sr_set_channel(sr, ftdmchan->chan_id, 0, 0);
			pri_sr_set_bearer(sr, 0, isdn_data->l1);
			pri_sr_set_called(sr, ftdmchan->caller_data.dnis.digits, dp, 1);
			pri_sr_set_caller(sr, ftdmchan->caller_data.cid_num.digits, (isdn_data->opts & FTMOD_LIBPRI_OPT_OMIT_DISPLAY_IE ? NULL : ftdmchan->caller_data.cid_name),
						dp, (ftdmchan->caller_data.pres != 1 ? PRES_ALLOWED_USER_NUMBER_PASSED_SCREEN : PRES_PROHIB_USER_NUMBER_NOT_SCREENED));

			if (!(isdn_data->opts & FTMOD_LIBPRI_OPT_OMIT_REDIRECTING_NUMBER_IE)) {
				pri_sr_set_redirecting(sr, ftdmchan->caller_data.cid_num.digits, dp, PRES_ALLOWED_USER_NUMBER_PASSED_SCREEN, PRI_REDIR_UNCONDITIONAL);
			}

			if (pri_setup(isdn_data->spri.pri, call, sr)) {
				ftdmchan->caller_data.hangup_cause = FTDM_CAUSE_DESTINATION_OUT_OF_ORDER;				
				ftdm_set_state_locked(ftdmchan, FTDM_CHANNEL_STATE_HANGUP);
			}

			pri_sr_free(sr);
		}

		break;
	case FTDM_CHANNEL_STATE_HANGUP:
		{
			if (call) {
				pri_hangup(isdn_data->spri.pri, call, ftdmchan->caller_data.hangup_cause);
				pri_destroycall(isdn_data->spri.pri, call);
				ftdm_set_state_locked(ftdmchan, FTDM_CHANNEL_STATE_DOWN);
			} else {
				ftdm_set_state_locked(ftdmchan, FTDM_CHANNEL_STATE_RESTART);
			}
		}
		break;
	case FTDM_CHANNEL_STATE_HANGUP_COMPLETE:
		break;
	case FTDM_CHANNEL_STATE_TERMINATING:
		{
			sig.event_id = FTDM_SIGEVENT_STOP;
			status = ftdm_span_send_signal(ftdmchan->span, &sig);
			ftdm_set_state_locked(ftdmchan, FTDM_CHANNEL_STATE_DOWN);

		}
	default:
		break;
	}



	return;
}

/**
 * \brief Checks current state on a span
 * \param span Span to check status on
 */
static __inline__ void check_state(ftdm_span_t *span)
{
    if (ftdm_test_flag(span, FTDM_SPAN_STATE_CHANGE)) {
        uint32_t j;
        ftdm_clear_flag_locked(span, FTDM_SPAN_STATE_CHANGE);
        for(j = 1; j <= span->chan_count; j++) {
            if (ftdm_test_flag((span->channels[j]), FTDM_CHANNEL_STATE_CHANGE)) {
				ftdm_mutex_lock(span->channels[j]->mutex);
                ftdm_clear_flag((span->channels[j]), FTDM_CHANNEL_STATE_CHANGE);
                state_advance(span->channels[j]);
                ftdm_channel_complete_state(span->channels[j]);
				ftdm_mutex_unlock(span->channels[j]->mutex);
            }
        }
    }
}

/**
 * \brief Handler for libpri information event (incoming call?)
 * \param spri Pri wrapper structure (libpri, span, dchan)
 * \param event_type Event type (unused)
 * \param pevent Event
 * \return 0
 */
static int on_info(lpwrap_pri_t *spri, lpwrap_pri_event_t event_type, pri_event *pevent)
{

	ftdm_log(FTDM_LOG_DEBUG, "number is: %s\n", pevent->ring.callednum);
	if (strlen(pevent->ring.callednum) > 3) {
		ftdm_log(FTDM_LOG_DEBUG, "final number is: %s\n", pevent->ring.callednum);
		pri_answer(spri->pri, pevent->ring.call, 0, 1);
	}
	return 0;
}

/**
 * \brief Handler for libpri hangup event
 * \param spri Pri wrapper structure (libpri, span, dchan)
 * \param event_type Event type (unused)
 * \param pevent Event
 * \return 0
 */
static int on_hangup(lpwrap_pri_t *spri, lpwrap_pri_event_t event_type, pri_event *pevent)
{
	ftdm_span_t *span = spri->private_info;
	ftdm_channel_t *ftdmchan = NULL;
	q931_call *call = NULL;
	ftdmchan = span->channels[pevent->hangup.channel];
	
	if (ftdmchan) {
		call = (q931_call *) ftdmchan->call_data;
		ftdm_log(FTDM_LOG_DEBUG, "-- Hangup on channel %d:%d\n", spri->span->span_id, pevent->hangup.channel);
		ftdmchan->caller_data.hangup_cause = pevent->hangup.cause;
		pri_release(spri->pri, call, 0);
		pri_destroycall(spri->pri, call);
		ftdm_set_state_locked(ftdmchan, FTDM_CHANNEL_STATE_TERMINATING);
	} else {
		ftdm_log(FTDM_LOG_DEBUG, "-- Hangup on channel %d:%d %s but it's not in use?\n", spri->span->span_id,
				pevent->hangup.channel, ftdmchan->chan_id);
	}

	return 0;
}

/**
 * \brief Handler for libpri answer event
 * \param spri Pri wrapper structure (libpri, span, dchan)
 * \param event_type Event type (unused)
 * \param pevent Event
 * \return 0
 */
static int on_answer(lpwrap_pri_t *spri, lpwrap_pri_event_t event_type, pri_event *pevent)
{
	ftdm_span_t *span = spri->private_info;
	ftdm_channel_t *ftdmchan = NULL;

	ftdmchan = span->channels[pevent->answer.channel];
	
	if (ftdmchan) {
		ftdm_log(FTDM_LOG_DEBUG, "-- Answer on channel %d:%d\n", spri->span->span_id, pevent->answer.channel);
		ftdm_set_state_locked(ftdmchan, FTDM_CHANNEL_STATE_UP);
	} else {
		ftdm_log(FTDM_LOG_DEBUG, "-- Answer on channel %d:%d %s but it's not in use?\n", spri->span->span_id, pevent->answer.channel, ftdmchan->chan_id);
				
	}

	return 0;
}

/**
 * \brief Handler for libpri proceed event
 * \param spri Pri wrapper structure (libpri, span, dchan)
 * \param event_type Event type (unused)
 * \param pevent Event
 * \return 0
 */
static int on_proceed(lpwrap_pri_t *spri, lpwrap_pri_event_t event_type, pri_event *pevent)
{
	ftdm_span_t *span = spri->private_info;
	ftdm_channel_t *ftdmchan = NULL;
	
	ftdmchan = span->channels[pevent->proceeding.channel];
	
	if (ftdmchan) {
		ftdm_log(FTDM_LOG_DEBUG, "-- Proceeding on channel %d:%d\n", spri->span->span_id, pevent->proceeding.channel);
		ftdm_set_state_locked(ftdmchan, FTDM_CHANNEL_STATE_PROGRESS_MEDIA);
	} else {
		ftdm_log(FTDM_LOG_DEBUG, "-- Proceeding on channel %d:%d %s but it's not in use?\n", spri->span->span_id,
						  pevent->proceeding.channel, ftdmchan->chan_id);
	}

	return 0;
}

/**
 * \brief Handler for libpri ringing event
 * \param spri Pri wrapper structure (libpri, span, dchan)
 * \param event_type Event type (unused)
 * \param pevent Event
 * \return 0
 */
static int on_ringing(lpwrap_pri_t *spri, lpwrap_pri_event_t event_type, pri_event *pevent)
{
	ftdm_span_t *span = spri->private_info;
	ftdm_channel_t *ftdmchan = NULL;

	ftdmchan = span->channels[pevent->ringing.channel];
	
	if (ftdmchan) {
		ftdm_log(FTDM_LOG_DEBUG, "-- Ringing on channel %d:%d\n", spri->span->span_id, pevent->ringing.channel);
		/* we may get on_ringing even when we're already in FTDM_CHANNEL_STATE_PROGRESS_MEDIA */
		if (ftdmchan->state == FTDM_CHANNEL_STATE_PROGRESS_MEDIA) {
			/* dont try to move to STATE_PROGRESS to avoid annoying veto warning */
			return 0;
		}
		ftdm_set_state_locked(ftdmchan, FTDM_CHANNEL_STATE_PROGRESS);
	} else {
		ftdm_log(FTDM_LOG_DEBUG, "-- Ringing on channel %d:%d %s but it's not in use?\n", spri->span->span_id,
						  pevent->ringing.channel, ftdmchan->chan_id);
	}

	return 0;
}

/**
 * \brief Handler for libpri ring event
 * \param spri Pri wrapper structure (libpri, span, dchan)
 * \param event_type Event type (unused)
 * \param pevent Event
 * \return 0 on success
 */
static int on_ring(lpwrap_pri_t *spri, lpwrap_pri_event_t event_type, pri_event *pevent)
{
	ftdm_span_t *span = spri->private_info;
	ftdm_channel_t *ftdmchan = NULL;
	int ret = 0;

	//switch_mutex_lock(globals.channel_mutex);
	
	ftdmchan = span->channels[pevent->ring.channel];
	if (!ftdmchan || ftdmchan->state != FTDM_CHANNEL_STATE_DOWN || ftdm_test_flag(ftdmchan, FTDM_CHANNEL_INUSE)) {
		ftdm_log(FTDM_LOG_WARNING, "--Duplicate Ring on channel %d:%d (ignored)\n", spri->span->span_id, pevent->ring.channel);
		ret = 0;
		goto done;
	}

	if (ftdm_channel_open_chan(ftdmchan) != FTDM_SUCCESS) {
		ftdm_log(FTDM_LOG_WARNING, "--Failure opening channel %d:%d (ignored)\n", spri->span->span_id, pevent->ring.channel);
		ret = 0;
		goto done;
	}
	

	ftdm_log(FTDM_LOG_NOTICE, "-- Ring on channel %d:%d (from %s to %s)\n", spri->span->span_id, pevent->ring.channel,
					  pevent->ring.callingnum, pevent->ring.callednum);
	
	memset(&ftdmchan->caller_data, 0, sizeof(ftdmchan->caller_data));
	
	ftdm_set_string(ftdmchan->caller_data.cid_num.digits, (char *)pevent->ring.callingnum);
	if (!ftdm_strlen_zero((char *)pevent->ring.callingname)) {
		ftdm_set_string(ftdmchan->caller_data.cid_name, (char *)pevent->ring.callingname);
	} else {
		ftdm_set_string(ftdmchan->caller_data.cid_name, (char *)pevent->ring.callingnum);
	}
	ftdm_set_string(ftdmchan->caller_data.ani.digits, (char *)pevent->ring.callingani);
	ftdm_set_string(ftdmchan->caller_data.dnis.digits, (char *)pevent->ring.callednum);
	
	if (pevent->ring.ani2 >= 0) {
		snprintf(ftdmchan->caller_data.aniII, 5, "%.2d", pevent->ring.ani2);
	}
	
	// scary to trust this pointer, you'd think they would give you a copy of the call data so you own it......
	ftdmchan->call_data = pevent->ring.call;
	
	ftdm_set_state_locked(ftdmchan, FTDM_CHANNEL_STATE_RING);
	
 done:
	//switch_mutex_unlock(globals.channel_mutex);

	return ret;
}

/**
 * \brief Processes freetdm event
 * \param span Span on which the event was fired
 * \param event Event to be treated
 * \return Success or failure
 */
static __inline__ ftdm_status_t process_event(ftdm_span_t *span, ftdm_event_t *event)
{
	ftdm_log(FTDM_LOG_DEBUG, "EVENT [%s][%d][%d:%d] STATE [%s]\n", 
			ftdm_oob_event2str(event->enum_id), event->enum_id, event->channel->span_id, event->channel->chan_id, ftdm_channel_state2str(event->channel->state));

	switch(event->enum_id) {
	case FTDM_OOB_ALARM_TRAP:
		{
			if (event->channel->state != FTDM_CHANNEL_STATE_DOWN) {
				if (event->channel->type == FTDM_CHAN_TYPE_B) {
					ftdm_set_state_locked(event->channel, FTDM_CHANNEL_STATE_RESTART);
				}
			}
			

			ftdm_set_flag(event->channel, FTDM_CHANNEL_SUSPENDED);

			
			ftdm_channel_get_alarms(event->channel);
			ftdm_log(FTDM_LOG_WARNING, "channel %d:%d (%d:%d) has alarms! [%s]\n", 
					event->channel->span_id, event->channel->chan_id, 
					event->channel->physical_span_id, event->channel->physical_chan_id, 
					event->channel->last_error);
		}
		break;
	case FTDM_OOB_ALARM_CLEAR:
		{
			
			ftdm_log(FTDM_LOG_WARNING, "channel %d:%d (%d:%d) alarms Cleared!\n", event->channel->span_id, event->channel->chan_id,
					event->channel->physical_span_id, event->channel->physical_chan_id);

			ftdm_clear_flag(event->channel, FTDM_CHANNEL_SUSPENDED);
			ftdm_channel_get_alarms(event->channel);
		}
		break;
	}

	return FTDM_SUCCESS;
}

/**
 * \brief Checks for events on a span
 * \param span Span to check for events
 */
static __inline__ void check_events(ftdm_span_t *span)
{
	ftdm_status_t status;

	status = ftdm_span_poll_event(span, 5);

	switch(status) {
	case FTDM_SUCCESS:
		{
			ftdm_event_t *event;
			while (ftdm_span_next_event(span, &event) == FTDM_SUCCESS) {
				if (event->enum_id == FTDM_OOB_NOOP) {
					continue;
				}
				if (process_event(span, event) != FTDM_SUCCESS) {
					break;
				}
			}
		}
		break;
	case FTDM_FAIL:
		{
			ftdm_log(FTDM_LOG_DEBUG, "Event Failure! %d\n", ftdm_running());
			ftdm_sleep(2000);
		}
		break;
	default:
		break;
	}
}

/**
 * \brief Checks flags on a pri span
 * \param spri Pri wrapper structure (libpri, span, dchan)
 * \return 0 on success, -1 on error
 */
static int check_flags(lpwrap_pri_t *spri)
{
	ftdm_span_t *span = spri->private_info;

	if (!ftdm_running() || ftdm_test_flag(span, FTDM_SPAN_STOP_THREAD)) {
		return -1;
	}

	check_state(span);
	check_events(span);


	return 0;
}

/**
 * \brief Handler for libpri restart event
 * \param spri Pri wrapper structure (libpri, span, dchan)
 * \param event_type Event type (unused)
 * \param pevent Event
 * \return 0
 */
static int on_restart(lpwrap_pri_t *spri, lpwrap_pri_event_t event_type, pri_event *pevent)
{
	ftdm_span_t *span = spri->private_info;
	ftdm_channel_t *ftdmchan;

	ftdm_log(FTDM_LOG_NOTICE, "-- Restarting %d:%d\n", spri->span->span_id, pevent->restart.channel);

	ftdmchan = span->channels[pevent->restart.channel];

	if (!ftdmchan) {
		return 0;
	}

	if (pevent->restart.channel < 1) {
		ftdm_set_state_all(ftdmchan->span, FTDM_CHANNEL_STATE_RESTART);
	} else {
		ftdm_set_state_locked(ftdmchan, FTDM_CHANNEL_STATE_RESTART);
	}

	return 0;
}

/**
 * \brief Handler for libpri dchan up event
 * \param spri Pri wrapper structure (libpri, span, dchan)
 * \param event_type Event type (unused)
 * \param pevent Event
 * \return 0
 */
static int on_dchan_up(lpwrap_pri_t *spri, lpwrap_pri_event_t event_type, pri_event *pevent)
{
	
	if (!ftdm_test_flag(spri, LPWRAP_PRI_READY)) {
		ftdm_log(FTDM_LOG_INFO, "Span %d D-Chan UP!\n", spri->span->span_id);
		ftdm_set_flag(spri, LPWRAP_PRI_READY);
		ftdm_set_state_all(spri->span, FTDM_CHANNEL_STATE_RESTART);
	}

	return 0;
}

/**
 * \brief Handler for libpri dchan down event
 * \param spri Pri wrapper structure (libpri, span, dchan)
 * \param event_type Event type (unused)
 * \param pevent Event
 * \return 0
 */
static int on_dchan_down(lpwrap_pri_t *spri, lpwrap_pri_event_t event_type, pri_event *pevent)
{

	if (ftdm_test_flag(spri, LPWRAP_PRI_READY)) {
		ftdm_log(FTDM_LOG_INFO, "Span %d D-Chan DOWN!\n", spri->span->span_id);
		ftdm_clear_flag(spri, LPWRAP_PRI_READY);
		ftdm_set_state_all(spri->span, FTDM_CHANNEL_STATE_RESTART);
		
	}

	return 0;
}

/**
 * \brief Handler for any libpri event
 * \param spri Pri wrapper structure (libpri, span, dchan)
 * \param event_type Event type (unused)
 * \param pevent Event
 * \return 0
 */
static int on_anything(lpwrap_pri_t *spri, lpwrap_pri_event_t event_type, pri_event *pevent)
{

	ftdm_log(FTDM_LOG_DEBUG, "Caught Event span %d %u (%s)\n", spri->span->span_id, event_type, lpwrap_pri_event_str(event_type));
	return 0;
}

/**
 * \brief Handler for libpri io fail event
 * \param spri Pri wrapper structure (libpri, span, dchan)
 * \param event_type Event type (unused)
 * \param pevent Event
 * \return 0
 */
static int on_io_fail(lpwrap_pri_t *spri, lpwrap_pri_event_t event_type, pri_event *pevent)
{

	ftdm_log(FTDM_LOG_DEBUG, "Caught Event span %d %u (%s)\n", spri->span->span_id, event_type, lpwrap_pri_event_str(event_type));
	return 0;
}

/**
 * \brief Main thread function for libpri span (monitor)
 * \param me Current thread
 * \param obj Span to run in this thread
 */
static void *ftdm_libpri_run(ftdm_thread_t *me, void *obj)
{
	ftdm_span_t *span = (ftdm_span_t *) obj;
	ftdm_libpri_data_t *isdn_data = span->signal_data;
	int i, x = 0;
	int down = 0;
	int got_d = 0;
	
	ftdm_set_flag(span, FTDM_SPAN_IN_THREAD);
	
	while(ftdm_running() && !ftdm_test_flag(span, FTDM_SPAN_STOP_THREAD)) {
		if (!got_d) {
			for(i = 1; i <= span->chan_count; i++) {
				if (span->channels[i]->type == FTDM_CHAN_TYPE_DQ921) {
					if (ftdm_channel_open(span->span_id, i, &isdn_data->dchan) == FTDM_SUCCESS) {
						ftdm_log(FTDM_LOG_DEBUG, "opening d-channel #%d %d:%d\n", x, isdn_data->dchan->span_id, isdn_data->dchan->chan_id);
						isdn_data->dchan->state = FTDM_CHANNEL_STATE_UP;
						got_d = 1;
						x++;
						break;
					}
				}
			}
		}
		
		
		if (lpwrap_init_pri(&isdn_data->spri,
								  span,  // span
								  isdn_data->dchan, // dchan
								  isdn_data->pswitch,
								  isdn_data->node,
								  isdn_data->debug) < 0) {
			snprintf(span->last_error, sizeof(span->last_error), "PRI init FAIL!");
		} else {

			LPWRAP_MAP_PRI_EVENT(isdn_data->spri, LPWRAP_PRI_EVENT_ANY, on_anything);
			LPWRAP_MAP_PRI_EVENT(isdn_data->spri, LPWRAP_PRI_EVENT_RING, on_ring);
			LPWRAP_MAP_PRI_EVENT(isdn_data->spri, LPWRAP_PRI_EVENT_RINGING, on_ringing);
			//LPWRAP_MAP_PRI_EVENT(isdn_data->spri, LPWRAP_PRI_EVENT_SETUP_ACK, on_proceed);
			LPWRAP_MAP_PRI_EVENT(isdn_data->spri, LPWRAP_PRI_EVENT_PROCEEDING, on_proceed);
			LPWRAP_MAP_PRI_EVENT(isdn_data->spri, LPWRAP_PRI_EVENT_ANSWER, on_answer);
			LPWRAP_MAP_PRI_EVENT(isdn_data->spri, LPWRAP_PRI_EVENT_DCHAN_UP, on_dchan_up);
			LPWRAP_MAP_PRI_EVENT(isdn_data->spri, LPWRAP_PRI_EVENT_DCHAN_DOWN, on_dchan_down);
			LPWRAP_MAP_PRI_EVENT(isdn_data->spri, LPWRAP_PRI_EVENT_HANGUP_REQ, on_hangup);
			LPWRAP_MAP_PRI_EVENT(isdn_data->spri, LPWRAP_PRI_EVENT_HANGUP, on_hangup);
			LPWRAP_MAP_PRI_EVENT(isdn_data->spri, LPWRAP_PRI_EVENT_INFO_RECEIVED, on_info);
			LPWRAP_MAP_PRI_EVENT(isdn_data->spri, LPWRAP_PRI_EVENT_RESTART, on_restart);
			LPWRAP_MAP_PRI_EVENT(isdn_data->spri, LPWRAP_PRI_EVENT_IO_FAIL, on_io_fail);

			if (down) {
				ftdm_log(FTDM_LOG_INFO, "PRI back up on span %d\n", isdn_data->spri.span->span_id);
				ftdm_set_state_all(span, FTDM_CHANNEL_STATE_RESTART);
				down = 0;
			}

			isdn_data->spri.on_loop = check_flags;
			isdn_data->spri.private_info = span;
			lpwrap_run_pri(&isdn_data->spri);

		}

		if (!ftdm_running() || ftdm_test_flag(span, FTDM_SPAN_STOP_THREAD)) {
			break;
		}

		ftdm_log(FTDM_LOG_CRIT, "PRI down on span %d\n", isdn_data->spri.span->span_id);

		if (!down) {
			ftdm_set_state_all(span, FTDM_CHANNEL_STATE_RESTART);
			check_state(span);
		}

		check_state(span);
		check_events(span);

		down++;
		ftdm_sleep(5000);
	}

	ftdm_log(FTDM_LOG_DEBUG, "PRI thread ended on span %d\n", isdn_data->spri.span->span_id);

	ftdm_clear_flag(span, FTDM_SPAN_IN_THREAD);
	ftdm_clear_flag(isdn_data, FTMOD_LIBPRI_RUNNING);

	return NULL;
}

/**
 * \brief Stops a libpri span
 * \param span Span to halt
 * \return Success
 *
 * Sets a stop flag and waits for the thread to end
 */
static ftdm_status_t ftdm_libpri_stop(ftdm_span_t *span)
{
	ftdm_libpri_data_t *isdn_data = span->signal_data;

	if (!ftdm_test_flag(isdn_data, FTMOD_LIBPRI_RUNNING)) {
		return FTDM_FAIL;
	}

	ftdm_set_state_all(span, FTDM_CHANNEL_STATE_RESTART);
	check_state(span);
	ftdm_set_flag(span, FTDM_SPAN_STOP_THREAD);
	while(ftdm_test_flag(span, FTDM_SPAN_IN_THREAD)) {
		ftdm_sleep(100);
	}
	check_state(span);

	return FTDM_SUCCESS;
}

/**
 * \brief Starts a libpri span
 * \param span Span to halt
 * \return Success or failure
 *
 * Launches a thread to monitor the span
 */
static ftdm_status_t ftdm_libpri_start(ftdm_span_t *span)
{
	ftdm_status_t ret;
	ftdm_libpri_data_t *isdn_data = span->signal_data;

	if (ftdm_test_flag(isdn_data, FTMOD_LIBPRI_RUNNING)) {
		return FTDM_FAIL;
	}

	ftdm_clear_flag(span, FTDM_SPAN_STOP_THREAD);
	ftdm_clear_flag(span, FTDM_SPAN_IN_THREAD);

	ftdm_set_flag(isdn_data, FTMOD_LIBPRI_RUNNING);
	ret = ftdm_thread_create_detached(ftdm_libpri_run, span);

	if (ret != FTDM_SUCCESS) {
		return ret;
	}

	return ret;
}

/**
 * \brief Converts a node string to node value
 * \param node Node string to convert
 * \return -1 on failure, node value on success
 */
static int str2node(char *node)
{
	if (!strcasecmp(node, "cpe") || !strcasecmp(node, "user"))
		return PRI_CPE;
	if (!strcasecmp(node, "network") || !strcasecmp(node, "net"))
		return PRI_NETWORK;
	return -1;
}

/**
 * \brief Converts a switch string to switch value
 * \param swtype Swtype string to convert
 * \return Switch value
 */
static int str2switch(char *swtype)
{
	if (!strcasecmp(swtype, "ni1"))
		return PRI_SWITCH_NI1;
	if (!strcasecmp(swtype, "ni2"))
		return PRI_SWITCH_NI2;
	if (!strcasecmp(swtype, "dms100"))
		return PRI_SWITCH_DMS100;
	if (!strcasecmp(swtype, "lucent5e") || !strcasecmp(swtype, "5ess"))
		return PRI_SWITCH_LUCENT5E;
	if (!strcasecmp(swtype, "att4ess") || !strcasecmp(swtype, "4ess"))
		return PRI_SWITCH_ATT4ESS;
	if (!strcasecmp(swtype, "euroisdn"))
		return PRI_SWITCH_EUROISDN_E1;
	if (!strcasecmp(swtype, "gr303eoc"))
		return PRI_SWITCH_GR303_EOC;
	if (!strcasecmp(swtype, "gr303tmc"))
		return PRI_SWITCH_GR303_TMC;
	return PRI_SWITCH_DMS100;
}

/**
 * \brief Converts a L1 string to L1 value
 * \param l1 L1 string to convert
 * \return L1 value
 */
static int str2l1(char *l1)
{
	if (!strcasecmp(l1, "alaw"))
		return PRI_LAYER_1_ALAW;
	
	return PRI_LAYER_1_ULAW;
}

/**
 * \brief Converts a DP string to DP value
 * \param dp DP string to convert
 * \return DP value
 */
static int str2dp(char *dp)
{
	if (!strcasecmp(dp, "international"))
		return PRI_INTERNATIONAL_ISDN;
	if (!strcasecmp(dp, "national"))
		return PRI_NATIONAL_ISDN;
	if (!strcasecmp(dp, "local"))
		return PRI_LOCAL_ISDN;
	if (!strcasecmp(dp, "private"))
		return PRI_PRIVATE;
	if (!strcasecmp(dp, "unknown"))
		return PRI_UNKNOWN;

	return PRI_UNKNOWN;
}

/**
 * \brief Initialises a libpri span from configuration variables
 * \param span Span to configure
 * \param sig_cb Callback function for event signals
 * \param ap List of configuration variables
 * \return Success or failure
 */
static FIO_SIG_CONFIGURE_FUNCTION(ftdm_libpri_configure_span)
{
	uint32_t i, x = 0;
	//ftdm_channel_t *dchans[2] = {0};
	ftdm_libpri_data_t *isdn_data;
	char *var, *val;
	char *debug = NULL;

	if (span->trunk_type >= FTDM_TRUNK_NONE) {
		ftdm_log(FTDM_LOG_WARNING, "Invalid trunk type '%s' defaulting to T1.\n", ftdm_trunk_type2str(span->trunk_type));
		span->trunk_type = FTDM_TRUNK_T1;
	}
	
	for(i = 1; i <= span->chan_count; i++) {
		if (span->channels[i]->type == FTDM_CHAN_TYPE_DQ921) {
			if (x > 1) {
				snprintf(span->last_error, sizeof(span->last_error), "Span has more than 2 D-Channels!");
				return FTDM_FAIL;
			} else {
#if 0
				if (ftdm_channel_open(span->span_id, i, &dchans[x]) == FTDM_SUCCESS) {
					ftdm_log(FTDM_LOG_DEBUG, "opening d-channel #%d %d:%d\n", x, dchans[x]->span_id, dchans[x]->chan_id);
					dchans[x]->state = FTDM_CHANNEL_STATE_UP;
					x++;
				}
#endif
			}
		}
	}
	
#if 0
	if (!x) {
		snprintf(span->last_error, sizeof(span->last_error), "Span has no D-Channels!");
		return FTDM_FAIL;
	}
#endif

	isdn_data = ftdm_malloc(sizeof(*isdn_data));
	assert(isdn_data != NULL);
	memset(isdn_data, 0, sizeof(*isdn_data));

    if (span->trunk_type == FTDM_TRUNK_E1) {
        ftdm_log(FTDM_LOG_NOTICE, "Setting default Layer 1 to ALAW since this is an E1 trunk\n");
        isdn_data->l1 = PRI_LAYER_1_ALAW;
    } else if (span->trunk_type == FTDM_TRUNK_T1) {
        ftdm_log(FTDM_LOG_NOTICE, "Setting default Layer 1 to ULAW since this is a T1 trunk\n");
        isdn_data->l1 = PRI_LAYER_1_ULAW;
    }
	
	while((var = va_arg(ap, char *))) {
		if (!strcasecmp(var, "node")) {
			int node;
			if (!(val = va_arg(ap, char *))) {
				break;
			}
			node = str2node(val);
			if (-1 == node) {
				ftdm_log(FTDM_LOG_ERROR, "Unknown node type %s, defaulting to CPE mode\n", val);
				node = PRI_CPE;
			}
			isdn_data->node = node;
		} else if (!strcasecmp(var, "switch")) {
			if (!(val = va_arg(ap, char *))) {
				break;
			}
			isdn_data->pswitch = str2switch(val);
		} else if (!strcasecmp(var, "opts")) {
			if (!(val = va_arg(ap, char *))) {
				break;
			}
			isdn_data->opts = parse_opts(val);
		} else if (!strcasecmp(var, "dp")) {
			if (!(val = va_arg(ap, char *))) {
				break;
			}
			isdn_data->dp = str2dp(val);
		} else if (!strcasecmp(var, "l1")) {
			if (!(val = va_arg(ap, char *))) {
				break;
			}
			isdn_data->l1 = str2l1(val);
		} else if (!strcasecmp(var, "debug")) {
			if (!(val = va_arg(ap, char *))) {
				break;
			}
			debug = val;
		} else {
			snprintf(span->last_error, sizeof(span->last_error), "Unknown parameter [%s]", var);
			return FTDM_FAIL;
		}
	}
    
	span->start = ftdm_libpri_start;
	span->stop = ftdm_libpri_stop;
	span->signal_cb = sig_cb;
	//isdn_data->dchans[0] = dchans[0];
	//isdn_data->dchans[1] = dchans[1];
	//isdn_data->dchan = isdn_data->dchans[0];
	
	isdn_data->debug = parse_debug(debug);
		

	span->signal_data = isdn_data;
	span->signal_type = FTDM_SIGTYPE_ISDN;
	span->outgoing_call = isdn_outgoing_call;

	if ((isdn_data->opts & FTMOD_LIBPRI_OPT_SUGGEST_CHANNEL)) {
		span->channel_request = isdn_channel_request;
		span->suggest_chan_id = 1;
	}

	span->state_map = &isdn_state_map;

	return FTDM_SUCCESS;
}

/**
 * \brief FreeTDM libpri signaling and IO module definition
 */
ftdm_module_t ftdm_module = { 
	"libpri",
	ftdm_libpri_io_init,
	ftdm_libpri_unload,
	ftdm_libpri_init,
	ftdm_libpri_configure_span,
	NULL
};


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