Support cipher mode reject with extended cause
* add function to generate cipher mode reject with extended (2-byte)
Cause IE
* add function to get (extended) Cause value
* add corresponding (extended cause) test
* update existing (non-extended cause) test
* use enum as a parameter for existing non-extended version to make
interface more unified
Change-Id: Id5509b94a18180a44f45300caaa02b843c166fa3
Related: OS#3187
diff --git a/src/gsm/gsm0808.c b/src/gsm/gsm0808.c
index c413688..a84e717 100644
--- a/src/gsm/gsm0808.c
+++ b/src/gsm/gsm0808.c
@@ -283,6 +283,30 @@
return msg;
}
+/*! Create BSSMAP Cipher Mode Reject message
+ * \param[in] class 3GPP TS 08.08 §3.2.2.5 cause's class
+ * \param[in] ext 3GPP TS 08.08 §3.2.2.5 cause value (national application extension)
+ * \returns callee-allocated msgb with BSSMAP Cipher Mode Reject message */
+struct msgb *gsm0808_create_cipher_reject_ext(enum gsm0808_cause_class class, uint8_t ext)
+{
+ uint8_t c[2];
+ struct msgb *msg = msgb_alloc_headroom(BSSMAP_MSG_SIZE, BSSMAP_MSG_HEADROOM,
+ "bssmap: cipher mode reject");
+ if (!msg)
+ return NULL;
+
+ c[0] = 0x80 | (class << 4); /* set the high bit to indicate extended cause */
+ c[1] = ext;
+
+ msgb_v_put(msg, BSS_MAP_MSG_CIPHER_MODE_REJECT);
+
+ msgb_tlv_put(msg, GSM0808_IE_CAUSE, 2, c);
+
+ msg->l3h = msgb_tv_push(msg, BSSAP_MSG_BSS_MANAGEMENT, msgb_length(msg));
+
+ return msg;
+}
+
/*! Create BSSMAP LCLS CONNECT CONTROL message (TS 48.008 3.2.1.91).
* \param[in] config LCLS Configuration
* \param[in] control LCLS Connection Status Control