smsutil: Add USSD encoding function

2 files changed, 30 insertions, 0 deletions

diff --git a/src/smsutil.c b/src/smsutil.c
index 26c79513..0d68d331 100644
--- a/src/smsutil.c
+++ b/src/smsutil.c
@@ -4179,3 +4179,32 @@ char *ussd_decode(int dcs, int len, const unsigned char *data)
 
 	return utf8;
 }
+
+gboolean ussd_encode(const char *str, long *items_written, unsigned char *pdu)
+{
+	unsigned char *converted = NULL;
+	long written;
+	long num_packed;
+
+	if (!pdu)
+		return FALSE;
+
+	converted = convert_utf8_to_gsm(str, -1, NULL, &written, 0);
+	if (!converted || written > 182)
+		goto error;
+
+	pack_7bit_own_buf(converted, written, 0, TRUE, &num_packed, 0, pdu);
+
+	g_free(converted);
+
+	if (num_packed < 1)
+		return FALSE;
+
+	if (items_written)
+		*items_written = num_packed;
+
+	return TRUE;
+error:
+	g_free(converted);
+	return FALSE;
+}
diff --git a/src/smsutil.h b/src/smsutil.h
index 0e0ddf45..a81fd6d5 100644
--- a/src/smsutil.h
+++ b/src/smsutil.h
@@ -544,3 +544,4 @@ GSList *cbs_optimize_ranges(GSList *ranges);
 gboolean cbs_topic_in_range(unsigned int topic, GSList *ranges);
 
 char *ussd_decode(int dcs, int len, const unsigned char *data);
+gboolean ussd_encode(const char *str, long *items_written, unsigned char *pdu);