gb: add bssgp2_enc_flush_ll encode FLUSH-LL
Change-Id: I76dc3b08a63cfd78c9f7657fb58c2ddfa9b4b7e2
diff --git a/src/gb/gprs_bssgp2.c b/src/gb/gprs_bssgp2.c
index 8e2ba66..104fe08 100644
--- a/src/gb/gprs_bssgp2.c
+++ b/src/gb/gprs_bssgp2.c
@@ -349,6 +349,35 @@
return msg;
}
+/*! Encode BSSGP FLUSH-LL PDU as per TS 48.018 Section 10.4.1.
+ * \param[in] tlli - the TLLI of the MS
+ * \param[in] old_bvci BVCI
+ * \param[in] new_bvci2 optional BVCI - only encoded if non-NULL
+ * \param[in] nsei optional - only encoded if non-NULL
+ * \returns encoded PDU or NULL in case of error */
+struct msgb *bssgp2_enc_flush_ll(uint32_t tlli, uint16_t old_bvci,
+ const uint16_t *new_bvci, const uint16_t *nsei)
+{
+ struct msgb *msg = bssgp_msgb_alloc();
+ struct bssgp_normal_hdr *bgph;
+
+ if (!msg)
+ return NULL;
+
+ bgph = (struct bssgp_normal_hdr *) msgb_put(msg, sizeof(*bgph));
+ bgph->pdu_type = BSSGP_PDUT_FLUSH_LL;
+
+ msgb_tvlv_put_32be(msg, BSSGP_IE_TLLI, tlli);
+ msgb_tvlv_put_16be(msg, BSSGP_IE_BVCI, old_bvci);
+ if (new_bvci)
+ msgb_tvlv_put_16be(msg, BSSGP_IE_BVCI, *new_bvci);
+
+ if (nsei)
+ msgb_tvlv_put_16be(msg, BSSGP_IE_BVCI, *nsei);
+
+ return msg;
+}
+
/*! Encode a FLOW-CONTROL-BVC-ACK PDU as per TS 48.018 Section 10.4.4.
* \param[in] tag the tag IE value to encode
* \returns encoded PDU or NULL in case of error */