Change in libosmocore[master]: gsm0808: add message generator for BSSMAP HANDOVER PERFORMED

[dexter]

dexter has uploaded this change for review. ( https://gerrit.osmocom.org/11728


Change subject: gsm0808: add message generator for BSSMAP HANDOVER PERFORMED
......................................................................

gsm0808: add message generator for BSSMAP HANDOVER PERFORMED

We currently have no generator function that can generate BSSMAP
HANDOVER PERFORMED messages. Lets add function for this.

Change-Id: I825106858bd89afc9837811b8fed2e8accc82441
Related: OS#3645
---
M include/osmocom/gsm/gsm0808.h
M src/gsm/gsm0808.c
M src/gsm/libosmogsm.map
3 files changed, 69 insertions(+), 0 deletions(-)



  git pull ssh://gerrit.osmocom.org:29418/libosmocore refs/changes/28/11728/1

diff --git a/include/osmocom/gsm/gsm0808.h b/include/osmocom/gsm/gsm0808.h
index cdbb273..4d12566 100644
--- a/include/osmocom/gsm/gsm0808.h
+++ b/include/osmocom/gsm/gsm0808.h
@@ -168,6 +168,24 @@
 };
 struct msgb *gsm0808_create_handover_failure(const struct gsm0808_handover_failure *params);
 
+struct gsm0808_handover_performed {
+	uint16_t cause;
+	struct osmo_cell_global_id cell;
+
+	bool chosen_channel_present;
+	uint8_t chosen_channel;
+
+	bool chosen_encr_alg_present;
+	uint8_t chosen_encr_alg;
+
+	bool speech_version_chosen_present;
+	uint8_t speech_version_chosen;
+
+	bool speech_codec_chosen_present;
+	struct gsm0808_speech_codec speech_codec_chosen;
+};
+struct msgb *gsm0808_create_handover_performed(const struct gsm0808_handover_performed *params);
+
 struct msgb *gsm0808_create_dtap(struct msgb *msg, uint8_t link_id);
 void gsm0808_prepend_dtap_header(struct msgb *msg, uint8_t link_id);
 
diff --git a/src/gsm/gsm0808.c b/src/gsm/gsm0808.c
index e5c3e30..7246289 100644
--- a/src/gsm/gsm0808.c
+++ b/src/gsm/gsm0808.c
@@ -871,6 +871,56 @@
 	return msg;
 }
 
+/*! Create BSSMAP HANDOVER PERFORMED message, 3GPP TS 48.008 3.2.1.25.
+ * \param[in] params  All information to be encoded.
+ * \returns callee-allocated msgb with BSSMAP HANDOVER PERFORMED message */
+struct msgb *gsm0808_create_handover_performed(const struct gsm0808_handover_performed *params)
+{
+	struct msgb *msg;
+	struct {
+		uint8_t ident;
+		struct gsm48_loc_area_id lai;
+		uint16_t ci;
+	} __attribute__ ((packed)) lai_ci;
+
+	msg = msgb_alloc_headroom(BSSMAP_MSG_SIZE, BSSMAP_MSG_HEADROOM, "BSSMAP-HANDOVER-PERFORMED");
+	if (!msg)
+		return NULL;
+
+	/* Message Type, 3.2.2.1 */
+	msgb_v_put(msg, BSS_MAP_MSG_HANDOVER_PERFORMED);
+
+	/* Cause, 3.2.2.5 */
+	msgb_tlv_put(msg, GSM0808_IE_CAUSE, params->cause & 0x80 ? 2 : 1, (const uint8_t *)&params->cause);
+
+	/* Cell Identifier, 3.2.2.17 */
+	lai_ci.ident = CELL_IDENT_WHOLE_GLOBAL;
+	gsm48_generate_lai2(&lai_ci.lai, &params->cell.lai);
+	lai_ci.ci = osmo_htons(params->cell.cell_identity);
+	msgb_tlv_put(msg, GSM0808_IE_CELL_IDENTIFIER, sizeof(lai_ci), (uint8_t *) & lai_ci);
+
+	/* Chosen Channel 3.2.2.33 */
+	if (params->chosen_channel_present)
+		msgb_tv_put(msg, GSM0808_IE_CHOSEN_CHANNEL, params->chosen_channel);
+
+	/* Chosen Encryption Algorithm 3.2.2.44 */
+	if (params->chosen_encr_alg_present)
+		msgb_tv_put(msg, GSM0808_IE_CHOSEN_ENCR_ALG, params->chosen_encr_alg);
+
+	/* Sspeech Version (chosen) 3.2.2.51 */
+	if (params->speech_version_chosen_present)
+		msgb_tv_put(msg, GSM0808_IE_SPEECH_VERSION, params->speech_version_chosen);
+
+	/* AoIP: Speech Codec (chosen) 3.2.2.104 */
+	if (params->speech_codec_chosen_present)
+		gsm0808_enc_speech_codec(msg, &params->speech_codec_chosen);
+
+	/* prepend header with final length */
+	msg->l3h = msgb_tv_push(msg, BSSAP_MSG_BSS_MANAGEMENT, msgb_length(msg));
+
+	return msg;
+}
+
 /*! Prepend a DTAP header to given Message Buffer
  *  \param[in] msgb Message Buffer
  *  \param[in] link_id Link Identifier */
diff --git a/src/gsm/libosmogsm.map b/src/gsm/libosmogsm.map
index 4813e13..34a7ff3 100644
--- a/src/gsm/libosmogsm.map
+++ b/src/gsm/libosmogsm.map
@@ -178,6 +178,7 @@
 gsm0808_create_handover_detect;
 gsm0808_create_handover_complete;
 gsm0808_create_handover_failure;
+gsm0808_create_handover_performed;
 gsm0808_prepend_dtap_header;
 gsm0808_enc_aoip_trasp_addr;
 gsm0808_dec_aoip_trasp_addr;

-- 
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Gerrit-Project: libosmocore
Gerrit-Branch: master
Gerrit-MessageType: newchange
Gerrit-Change-Id: I825106858bd89afc9837811b8fed2e8accc82441
Gerrit-Change-Number: 11728
Gerrit-PatchSet: 1
Gerrit-Owner: dexter <pmaier at sysmocom.de>
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