gsm/sms: Moved utility functions of SMS processing to new gsm0411_utils.c

Written-by: Andreas Eversberg <jolly@eversberg.eu>
Signed-off-by: Sylvain Munaut <tnt@246tNt.com>
diff --git a/include/osmocom/gsm/gsm0411_utils.h b/include/osmocom/gsm/gsm0411_utils.h
new file mode 100644
index 0000000..a030f58
--- /dev/null
+++ b/include/osmocom/gsm/gsm0411_utils.h
@@ -0,0 +1,30 @@
+#ifndef _GSM0411_UTILS_H
+#define _GSM0411_UTILS_H
+
+struct msgb *gsm411_msgb_alloc(void);
+
+/* Generate 03.40 TP-SCTS */
+void gsm340_gen_scts(uint8_t *scts, time_t time);
+
+/* Decode 03.40 TP-SCTS (into utc/gmt timestamp) */
+time_t gsm340_scts(uint8_t *scts);
+
+/* decode validity period. return minutes */
+unsigned long gsm340_validity_period(uint8_t sms_vpf, uint8_t *sms_vp);
+
+/* determine coding alphabet dependent on GSM 03.38 Section 4 DCS */
+enum sms_alphabet gsm338_get_sms_alphabet(uint8_t dcs);
+
+/* generate a TPDU address field compliant with 03.40 sec. 9.1.2.5 */
+int gsm340_gen_oa(uint8_t *oa, unsigned int oa_len, uint8_t type,
+	uint8_t plan, const char *number);
+
+/* Prefix msg with a RP header */
+int gsm411_push_rp_header(struct msgb *msg, uint8_t rp_msg_type,
+	uint8_t rp_msg_ref);
+
+/* Prefix msg with a 04.08/04.11 CP header */
+int gsm411_push_cp_header(struct msgb *msg, uint8_t proto, uint8_t trans,
+			     uint8_t msg_type);
+
+#endif /* _GSM0411_UTILS_H */