GSUP: deprecate osmo_gsup_get_err_msg_type()
Replace osmo_gsup_get_err_msg_type() with a wrapper to
OSMO_GSUP_TO_MSGT_ERROR(). This macro assumes, that all error messages
are (request message | 0x000001). Add a big comment header for
osmo_gsup_message_type, describing this already implicitly followed rule
and therefore making it explicit.
With this change, we don't need to maintain the request -> error message
mapping in osmo_gsup_get_err_msg_type() anymore.
Related: Iec1b4ce4b7d8eb157406f006e1c4241e8fba2cd6 (osmo-gsm-manuals)
Change-Id: I46d9f2327791978710e2f90b4d28a3761d723d8f
diff --git a/include/osmocom/gsm/gsup.h b/include/osmocom/gsm/gsup.h
index 5dc2a82..29ea11a 100644
--- a/include/osmocom/gsm/gsup.h
+++ b/include/osmocom/gsm/gsup.h
@@ -105,7 +105,18 @@
_OSMO_GSUP_IEI_END_MARKER
};
-/*! GSUP message type */
+/*! GSUP message type
+ * Make sure that new messages follow this scheme:
+ * .----------------------------.
+ * | Ending Bits | Category |
+ * |----------------------------|
+ * | 00 | Request |
+ * | 01 | Error |
+ * | 10 | Result |
+ * | 11 | Other |
+ * '----------------------------'
+ * Request, Error and Result messages must only differ in these last two bits.
+ */
enum osmo_gsup_message_type {
OSMO_GSUP_MSGT_UPDATE_LOCATION_REQUEST = 0b00000100,
OSMO_GSUP_MSGT_UPDATE_LOCATION_ERROR = 0b00000101,
@@ -280,6 +291,7 @@
int osmo_gsup_decode(const uint8_t *data, size_t data_len,
struct osmo_gsup_message *gsup_msg);
int osmo_gsup_encode(struct msgb *msg, const struct osmo_gsup_message *gsup_msg);
-int osmo_gsup_get_err_msg_type(enum osmo_gsup_message_type type_in);
+int osmo_gsup_get_err_msg_type(enum osmo_gsup_message_type type_in)
+ OSMO_DEPRECATED("Use OSMO_GSUP_TO_MSGT_ERROR() instead");
/*! @} */