commit b662b36da0bd3bd6ccad65e1614df1466a30d20d
author Neels Hofmeyr <neels@hofmeyr.de> Mon Apr 16 22:31:15 2018 +0200
committer Neels Hofmeyr <neels@hofmeyr.de> Sun May 27 22:04:17 2018 +0200
tree 7b48a77f7fc8a2893178a0cd7b4abd128918836f
parent 70aba3ffe2e6dbff4b8bf17c0f1273d8b4387109

add gsm0808_create_handover_request_ack()

Related: OS#2283 (inter-BSC Handover, BSC side, MT)
Change-Id: I692292a06c7d66004404560dc4ed933ca9107f9b

src/gsm/gsm0808.c

diff --git a/src/gsm/gsm0808.c b/src/gsm/gsm0808.c
index 80f5e6c..5af53ee 100644
--- a/src/gsm/gsm0808.c
+++ b/src/gsm/gsm0808.c
@@ -679,6 +679,31 @@
 	return msg;
 }
 
+/*! Create BSSMAP HANDOVER REQUEST ACKNOWLEDGE message, 3GPP TS 48.008 3.2.1.10. */
+struct msgb *gsm0808_create_handover_request_ack(const uint8_t *l3_info, uint8_t l3_info_len,
+						 uint8_t chosen_channel, uint8_t chosen_encr_alg,
+						 uint8_t chosen_speech_version)
+{
+	struct msgb *msg;
+
+	msg = msgb_alloc_headroom(BSSMAP_MSG_SIZE, BSSMAP_MSG_HEADROOM, "BSSMAP-HANDOVER-ACCEPT-ACK");
+	if (!msg)
+		return NULL;
+
+	/* Message Type, 3.2.2.1 */
+	msgb_v_put(msg, BSS_MAP_MSG_HANDOVER_RQST_ACKNOWLEDGE);
+
+	/* Layer 3 Information, 3.2.2.24 */
+	msgb_tlv_put(msg, GSM0808_IE_LAYER_3_INFORMATION, l3_info_len, l3_info);
+
+	msgb_tv_put(msg, GSM0808_IE_CHOSEN_CHANNEL, chosen_channel);
+	msgb_tv_put(msg, GSM0808_IE_CHOSEN_ENCR_ALG, chosen_encr_alg);
+	if (chosen_speech_version != 0)
+		msgb_tv_put(msg, GSM0808_IE_SPEECH_VERSION, chosen_speech_version);
+
+	return msg;
+}
+
 /*! Prepend a DTAP header to given Message Buffer
  *  \param[in] msgb Message Buffer
  *  \param[in] link_id Link Identifier */

src/gsm/libosmogsm.map

diff --git a/src/gsm/libosmogsm.map b/src/gsm/libosmogsm.map
index 58a5bfe..3b9fbfd 100644
--- a/src/gsm/libosmogsm.map
+++ b/src/gsm/libosmogsm.map
@@ -162,6 +162,7 @@
 gsm0808_create_reset_ack;
 gsm0808_create_sapi_reject;
 gsm0808_create_handover_required;
+gsm0808_create_handover_request_ack;
 gsm0808_prepend_dtap_header;
 gsm0808_enc_aoip_trasp_addr;
 gsm0808_dec_aoip_trasp_addr;