gsm0808: Add CSFB indication IE to BSSMAP CLEAR COMMAND
When a call that was established in a CSFB context ends the CLEAR
COMMAND that is send from the BSC to the MSC should contain a CSFB
indication IE, which consists of just the IE byte itsslef. This
additional IE tells the BSC to include other CSFB related IEs into the
RR Release message.
Change-Id: Id8a75e1da2d5f520064666e4ee413d1c91da6ae3
Related: OS#3778
diff --git a/src/gsm/gsm0808.c b/src/gsm/gsm0808.c
index fce8e0a..2907255 100644
--- a/src/gsm/gsm0808.c
+++ b/src/gsm/gsm0808.c
@@ -195,6 +195,22 @@
return msg;
}
+/*! Create BSSMAP Clear Command message.
+ * \param[in] cause TS 08.08 cause value.
+ * \param[in] csfb_ind indicate that the call was established in an CSFB context.
+ * \returns callee-allocated msgb with BSSMAP Clear Command message. */
+struct msgb *gsm0808_create_clear_command2(uint8_t cause, bool csfb_ind)
+{
+ struct msgb *msg = gsm0808_create_clear_command(cause);
+ if (!msg)
+ return NULL;
+
+ if (csfb_ind)
+ msgb_v_put(msg, GSM0808_IE_CSFB_INDICATION);
+
+ return msg;
+}
+
/*! Create BSSMAP Cipher Mode Command message
* \param[in] ei Mandatory Encryption Information
* \param[in] cipher_response_mode optional 1-byte Cipher Response Mode