1 files changed, 2 insertions, 364 deletions

diff --git a/openbsc/src/mncc.c b/openbsc/src/mncc.c
index 762e7f191..478a8a956 100644
--- a/openbsc/src/mncc.c
+++ b/openbsc/src/mncc.c
@@ -1,5 +1,5 @@
-/* mncc.c - default, minimal built-in MNCC Application for
- *	    standalone bsc_hack (netowrk-in-the-box mode) */
+/* mncc.c - utility routines for the MNCC API between the 04.08
+ *	    message parsing and the actual Call Control logic */
 
 /* (C) 2008-2009 by Harald Welte <laforge@gnumonks.org>
  * (C) 2009 by Andreas Eversberg <Andreas.Eversberg@versatel.de>
@@ -36,8 +36,6 @@
 #include <openbsc/transaction.h>
 #include <openbsc/rtp_proxy.h>
 
-void *tall_call_ctx;
-
 static struct mncc_names {
 	char *name;
 	int value;
@@ -92,10 +90,6 @@ static struct mncc_names {
 
 	{NULL, 0} };
 
-static LLIST_HEAD(call_list);
-
-static u_int32_t new_callref = 0x00000001;
-
 char *get_mncc_name(int value)
 {
 	int i;
@@ -108,365 +102,9 @@ char *get_mncc_name(int value)
 	return "MNCC_Unknown";
 }
 
-static void free_call(struct gsm_call *call)
-{
-	llist_del(&call->entry);
-	DEBUGP(DMNCC, "(call %x) Call removed.\n", call->callref);
-	talloc_free(call);
-}
-
-
-static struct gsm_call *get_call_ref(u_int32_t callref)
-{
-	struct gsm_call *callt;
-
-	llist_for_each_entry(callt, &call_list, entry) {
-		if (callt->callref == callref)
-			return callt;
-	}
-	return NULL;
-}
-
 void mncc_set_cause(struct gsm_mncc *data, int loc, int val)
 {
 	data->fields |= MNCC_F_CAUSE;
 	data->cause.location = loc;
 	data->cause.value = val;
 }
-
-/* on incoming call, look up database and send setup to remote subscr. */
-static int mncc_setup_ind(struct gsm_call *call, int msg_type,
-			  struct gsm_mncc *setup)
-{
-	struct gsm_mncc mncc;
-	struct gsm_call *remote;
-
-	memset(&mncc, 0, sizeof(struct gsm_mncc));
-	mncc.callref = call->callref;
-
-	/* already have remote call */
-	if (call->remote_ref)
-		return 0;
-	
-	/* transfer mode 1 would be packet mode, which was never specified */
-	if (setup->bearer_cap.mode != 0) {
-		LOGP(DMNCC, LOGL_NOTICE, "(call %x) We don't support "
-			"packet mode\n", call->callref);
-		mncc_set_cause(&mncc, GSM48_CAUSE_LOC_PRN_S_LU,
-				GSM48_CC_CAUSE_BEARER_CA_UNAVAIL);
-		goto out_reject;
-	}
-
-	/* we currently only do speech */
-	if (setup->bearer_cap.transfer != GSM_MNCC_BCAP_SPEECH) {
-		LOGP(DMNCC, LOGL_NOTICE, "(call %x) We only support "
-			"voice calls\n", call->callref);
-		mncc_set_cause(&mncc, GSM48_CAUSE_LOC_PRN_S_LU,
-				GSM48_CC_CAUSE_BEARER_CA_UNAVAIL);
-		goto out_reject;
-	}
-
-	/* create remote call */
-	if (!(remote = talloc(tall_call_ctx, struct gsm_call))) {
-		mncc_set_cause(&mncc, GSM48_CAUSE_LOC_PRN_S_LU,
-				GSM48_CC_CAUSE_RESOURCE_UNAVAIL);
-		goto out_reject;
-	}
-	llist_add_tail(&remote->entry, &call_list);
-	remote->net = call->net;
-	remote->callref = new_callref++;
-	DEBUGP(DMNCC, "(call %x) Creating new remote instance %x.\n",
-		call->callref, remote->callref);
-
-	/* link remote call */
-	call->remote_ref = remote->callref;
-	remote->remote_ref = call->callref;
-
-	/* modify mode */
-	memset(&mncc, 0, sizeof(struct gsm_mncc));
-	mncc.callref = call->callref;
-	mncc.lchan_mode = GSM48_CMODE_SPEECH_EFR;
-	DEBUGP(DMNCC, "(call %x) Modify channel mode.\n", call->callref);
-	mncc_send(call->net, MNCC_LCHAN_MODIFY, &mncc);
-
-	/* send call proceeding */
-	memset(&mncc, 0, sizeof(struct gsm_mncc));
-	mncc.callref = call->callref;
-	DEBUGP(DMNCC, "(call %x) Accepting call.\n", call->callref);
-	mncc_send(call->net, MNCC_CALL_PROC_REQ, &mncc);
-
-	/* send setup to remote */
-//	setup->fields |= MNCC_F_SIGNAL;
-//	setup->signal = GSM48_SIGNAL_DIALTONE;
-	setup->callref = remote->callref;
-	DEBUGP(DMNCC, "(call %x) Forwarding SETUP to remote.\n", call->callref);
-	return mncc_send(remote->net, MNCC_SETUP_REQ, setup);
-
-out_reject:
-	mncc_send(call->net, MNCC_REJ_REQ, &mncc);
-	free_call(call);
-	return 0;
-}
-
-static int mncc_alert_ind(struct gsm_call *call, int msg_type,
-			  struct gsm_mncc *alert)
-{
-	struct gsm_call *remote;
-
-	/* send alerting to remote */
-	if (!(remote = get_call_ref(call->remote_ref)))
-		return 0;
-	alert->callref = remote->callref;
-	DEBUGP(DMNCC, "(call %x) Forwarding ALERT to remote.\n", call->callref);
-	return mncc_send(remote->net, MNCC_ALERT_REQ, alert);
-}
-
-static int mncc_notify_ind(struct gsm_call *call, int msg_type,
-			   struct gsm_mncc *notify)
-{
-	struct gsm_call *remote;
-
-	/* send notify to remote */
-	if (!(remote = get_call_ref(call->remote_ref)))
-		return 0;
-	notify->callref = remote->callref;
-	DEBUGP(DMNCC, "(call %x) Forwarding NOTIF to remote.\n", call->callref);
-	return mncc_send(remote->net, MNCC_NOTIFY_REQ, notify);
-}
-
-static int mncc_setup_cnf(struct gsm_call *call, int msg_type,
-			  struct gsm_mncc *connect)
-{
-	struct gsm_mncc connect_ack, frame_recv;
-	struct gsm_network *net = call->net;
-	struct gsm_call *remote;
-	u_int32_t refs[2];
-
-	/* acknowledge connect */
-	memset(&connect_ack, 0, sizeof(struct gsm_mncc));
-	connect_ack.callref = call->callref;
-	DEBUGP(DMNCC, "(call %x) Acknowledge SETUP.\n", call->callref);
-	mncc_send(call->net, MNCC_SETUP_COMPL_REQ, &connect_ack);
-
-	/* send connect message to remote */
-	if (!(remote = get_call_ref(call->remote_ref)))
-		return 0;
-	connect->callref = remote->callref;
-	DEBUGP(DMNCC, "(call %x) Sending CONNECT to remote.\n", call->callref);
-	mncc_send(remote->net, MNCC_SETUP_RSP, connect);
-
-	/* bridge tch */
-	refs[0] = call->callref;
-	refs[1] = call->remote_ref;
-	DEBUGP(DMNCC, "(call %x) Bridging with remote.\n", call->callref);
-
-	/* in direct mode, we always have to bridge the channels */
-	if (ipacc_rtp_direct)
-		return mncc_send(call->net, MNCC_BRIDGE, refs);
-
-	/* proxy mode */
-	if (!net->handover.active) {
-		/* in the no-handover case, we can bridge, i.e. use
-		 * the old RTP proxy code */
-		return mncc_send(call->net, MNCC_BRIDGE, refs);
-	} else {
-		/* in case of handover, we need to re-write the RTP
-		 * SSRC, sequence and timestamp values and thus
-		 * need to enable RTP receive for both directions */
-		memset(&frame_recv, 0, sizeof(struct gsm_mncc));
-		frame_recv.callref = call->callref;
-		mncc_send(call->net, MNCC_FRAME_RECV, &frame_recv);
-		frame_recv.callref = call->remote_ref;
-		return mncc_send(call->net, MNCC_FRAME_RECV, &frame_recv);
-	}
-}
-
-static int mncc_disc_ind(struct gsm_call *call, int msg_type,
-			 struct gsm_mncc *disc)
-{
-	struct gsm_call *remote;
-
-	/* send release */
-	DEBUGP(DMNCC, "(call %x) Releasing call with cause %d\n",
-		call->callref, disc->cause.value);
-	mncc_send(call->net, MNCC_REL_REQ, disc);
-
-	/* send disc to remote */
-	if (!(remote = get_call_ref(call->remote_ref))) {
-		return 0;
-	}
-	disc->callref = remote->callref;
-	DEBUGP(DMNCC, "(call %x) Disconnecting remote with cause %d\n",
-		remote->callref, disc->cause.value);
-	return mncc_send(remote->net, MNCC_DISC_REQ, disc);
-}
-
-static int mncc_rel_ind(struct gsm_call *call, int msg_type, struct gsm_mncc *rel)
-{
-	struct gsm_call *remote;
-
-	/* send release to remote */
-	if (!(remote = get_call_ref(call->remote_ref))) {
-		free_call(call);
-		return 0;
-	}
-	rel->callref = remote->callref;
-	DEBUGP(DMNCC, "(call %x) Releasing remote with cause %d\n",
-		call->callref, rel->cause.value);
-	mncc_send(remote->net, MNCC_REL_REQ, rel);
-
-	free_call(call);
-
-	return 0;
-}
-
-static int mncc_rel_cnf(struct gsm_call *call, int msg_type, struct gsm_mncc *rel)
-{
-	free_call(call);
-	return 0;
-}
-
-/* receiving a TCH/F frame from the BSC code */
-static int mncc_rcv_tchf(struct gsm_call *call, int msg_type,
-			 struct gsm_data_frame *dfr)
-{
-	struct gsm_trans *remote_trans;
-
-	remote_trans = trans_find_by_callref(call->net, call->remote_ref);
-
-	/* this shouldn't really happen */
-	if (!remote_trans || !remote_trans->conn) {
-		LOGP(DMNCC, LOGL_ERROR, "No transaction or transaction without lchan?!?\n");
-		return -EIO;
-	}
-
-	/* RTP socket of remote end has meanwhile died */
-	if (!remote_trans->conn->lchan->abis_ip.rtp_socket)
-		return -EIO;
-
-	return rtp_send_frame(remote_trans->conn->lchan->abis_ip.rtp_socket, dfr);
-}
-
-
-/* Internal MNCC handler input function (from CC -> MNCC -> here) */
-int int_mncc_recv(struct gsm_network *net, int msg_type, void *arg)
-{
-	struct gsm_mncc *data = arg;
-	int callref;
-	struct gsm_call *call = NULL, *callt;
-	int rc = 0;
-
-	/* Special messages */
-	switch(msg_type) {
-	}
-	
-	/* find callref */
-	callref = data->callref;
-	llist_for_each_entry(callt, &call_list, entry) {
-		if (callt->callref == callref) {
-			call = callt;
-			break;
-		}
-	}
-
-	/* create callref, if setup is received */
-	if (!call) {
-		if (msg_type != MNCC_SETUP_IND)
-			return 0; /* drop */
-		/* create call */
-		if (!(call = talloc_zero(tall_call_ctx, struct gsm_call))) {
-			struct gsm_mncc rel;
-			
-			memset(&rel, 0, sizeof(struct gsm_mncc));
-			rel.callref = callref;
-			mncc_set_cause(&rel, GSM48_CAUSE_LOC_PRN_S_LU,
-				       GSM48_CC_CAUSE_RESOURCE_UNAVAIL);
-			mncc_send(net, MNCC_REL_REQ, &rel);
-			return 0;
-		}
-		llist_add_tail(&call->entry, &call_list);
-		call->net = net;
-		call->callref = callref;
-		DEBUGP(DMNCC, "(call %x) Call created.\n", call->callref);
-	}
-
-	switch (msg_type) {
-	case GSM_TCHF_FRAME:
-	case GSM_TCHF_FRAME_EFR:
-		break;
-	default:
-		DEBUGP(DMNCC, "(call %x) Received message %s\n", call->callref,
-			get_mncc_name(msg_type));
-		break;
-	}
-
-	switch(msg_type) {
-	case MNCC_SETUP_IND:
-		rc = mncc_setup_ind(call, msg_type, arg);
-		break;
-	case MNCC_SETUP_CNF:
-		rc = mncc_setup_cnf(call, msg_type, arg);
-		break;
-	case MNCC_SETUP_COMPL_IND:
-		break;
-	case MNCC_CALL_CONF_IND:
-		/* we now need to MODIFY the channel */
-		data->lchan_mode = GSM48_CMODE_SPEECH_EFR;
-		mncc_send(call->net, MNCC_LCHAN_MODIFY, data);
-		break;
-	case MNCC_ALERT_IND:
-		rc = mncc_alert_ind(call, msg_type, arg);
-		break;
-	case MNCC_NOTIFY_IND:
-		rc = mncc_notify_ind(call, msg_type, arg);
-		break;
-	case MNCC_DISC_IND:
-		rc = mncc_disc_ind(call, msg_type, arg);
-		break;
-	case MNCC_REL_IND:
-	case MNCC_REJ_IND:
-		rc = mncc_rel_ind(call, msg_type, arg);
-		break;
-	case MNCC_REL_CNF:
-		rc = mncc_rel_cnf(call, msg_type, arg);
-		break;
-	case MNCC_FACILITY_IND:
-		break;
-	case MNCC_START_DTMF_IND:
-		break;
-	case MNCC_STOP_DTMF_IND:
-		break;
-	case MNCC_MODIFY_IND:
-		mncc_set_cause(data, GSM48_CAUSE_LOC_PRN_S_LU,
-				GSM48_CC_CAUSE_SERV_OPT_UNIMPL);
-		DEBUGP(DMNCC, "(call %x) Rejecting MODIFY with cause %d\n",
-			call->callref, data->cause.value);
-		rc = mncc_send(net, MNCC_MODIFY_REJ, data);
-		break;
-	case MNCC_MODIFY_CNF:
-		break;
-	case MNCC_HOLD_IND:
-		mncc_set_cause(data, GSM48_CAUSE_LOC_PRN_S_LU,
-				GSM48_CC_CAUSE_SERV_OPT_UNIMPL);
-		DEBUGP(DMNCC, "(call %x) Rejecting HOLD with cause %d\n",
-			call->callref, data->cause.value);
-		rc = mncc_send(net, MNCC_HOLD_REJ, data);
-		break;
-	case MNCC_RETRIEVE_IND:
-		mncc_set_cause(data, GSM48_CAUSE_LOC_PRN_S_LU,
-				GSM48_CC_CAUSE_SERV_OPT_UNIMPL);
-		DEBUGP(DMNCC, "(call %x) Rejecting RETRIEVE with cause %d\n",
-			call->callref, data->cause.value);
-		rc = mncc_send(net, MNCC_RETRIEVE_REJ, data);
-		break;
-	case GSM_TCHF_FRAME:
-	case GSM_TCHF_FRAME_EFR:
-		rc = mncc_rcv_tchf(call, msg_type, arg);
-		break;
-	default:
-		LOGP(DMNCC, LOGL_NOTICE, "(call %x) Message unhandled\n", callref);
-		break;
-	}
-
-	return rc;
-}