Gracefully reject non-speech calls
As we currently really only deal with voice/speech calls and don't
support FAX and DATA (CSD) calls, we now gracefully reject them.
diff --git a/openbsc/src/mncc.c b/openbsc/src/mncc.c
index f62541c..de17657 100644
--- a/openbsc/src/mncc.c
+++ b/openbsc/src/mncc.c
@@ -22,6 +22,7 @@
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
+#include <errno.h>
#include <sys/types.h>
#include <openbsc/gsm_04_08.h>
@@ -136,19 +137,36 @@
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) {
+ DEBUGP(DMNCC, "(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) {
+ DEBUGP(DMNCC, "(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))) {
- memset(&mncc, 0, sizeof(struct gsm_mncc));
- mncc.callref = call->callref;
mncc_set_cause(&mncc, GSM48_CAUSE_LOC_PRN_S_LU,
GSM48_CC_CAUSE_RESOURCE_UNAVAIL);
- mncc_send(call->net, MNCC_REJ_REQ, &mncc);
- free_call(call);
- return 0;
+ goto out_reject;
}
llist_add_tail(&remote->entry, &call_list);
remote->net = call->net;
@@ -179,6 +197,11 @@
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,