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authorPhilipp Maier <pmaier@sysmocom.de>2017-03-29 17:37:55 +0200
committerHarald Welte <laforge@gnumonks.org>2017-04-08 07:44:46 +0000
commit3d48ec06a94d128ee67ceff738c753d70ffbca30 (patch)
treeb59236279c921f676550b2bcbafe5b8e913cc5f4 /src/gsm
parentb478dd38d29b0dfdf9d9c4d6f22ec4a24e4c8fcd (diff)
gsm0808: Add create functions for BSS_MAP_MSG_PAGING
gsm0808.h/c lacks functionality to generate BSS_MAP_MSG_PAGING messages. These messages are required if the code is used in an MSC implementation. This commit adds a gsm0808_create_paging() function, that generates an A/AoiP BSS_MAP_MSG_PAGING message. Change-Id: I9afecf0109305ca5153bf081bb29cd94071dd2b7
Diffstat (limited to 'src/gsm')
-rw-r--r--src/gsm/gsm0808.c52
-rw-r--r--src/gsm/libosmogsm.map1
2 files changed, 53 insertions, 0 deletions
diff --git a/src/gsm/gsm0808.c b/src/gsm/gsm0808.c
index c952a9f8..2721a1b1 100644
--- a/src/gsm/gsm0808.c
+++ b/src/gsm/gsm0808.c
@@ -347,6 +347,58 @@ struct msgb *gsm0808_create_clear_rqst(uint8_t cause)
return msg;
}
+struct msgb *gsm0808_create_paging(const char *imsi, const uint32_t *tmsi,
+ const struct gsm0808_cell_id_list *cil,
+ const uint8_t *chan_needed)
+{
+ struct msgb *msg;
+ uint8_t mid_buf[GSM48_MI_SIZE + 2];
+ int mid_len;
+ uint32_t tmsi_sw;
+
+ /* Mandatory emelents! */
+ OSMO_ASSERT(imsi);
+ OSMO_ASSERT(cil);
+
+ /* Malformed IMSI */
+ OSMO_ASSERT(strlen(imsi) <= GSM48_MI_SIZE);
+
+ msg =
+ msgb_alloc_headroom(BSSMAP_MSG_SIZE, BSSMAP_MSG_HEADROOM, "paging");
+ if (!msg)
+ return NULL;
+
+ /* Message Type 3.2.2.1 */
+ msgb_v_put(msg, BSS_MAP_MSG_PAGING);
+
+ /* IMSI 3.2.2.6 */
+ mid_len = gsm48_generate_mid_from_imsi(mid_buf, imsi);
+ msgb_tlv_put(msg, GSM0808_IE_IMSI, mid_len - 2, mid_buf + 2);
+
+ /* TMSI 3.2.2.7 */
+ if (tmsi) {
+ tmsi_sw = htonl(*tmsi);
+ msgb_tlv_put(msg, GSM0808_IE_TMSI, sizeof(*tmsi),
+ (uint8_t *) & tmsi_sw);
+ }
+
+ /* Cell Identifier List 3.2.2.27 */
+ if (cil)
+ gsm0808_enc_cell_id_list(msg, cil);
+
+ /* Channel Needed 3.2.2.36 */
+ if (chan_needed) {
+ msgb_tv_put(msg, GSM0808_IE_CHANNEL_NEEDED,
+ (*chan_needed) & 0x03);
+ }
+
+ /* pre-pend the header */
+ msg->l3h =
+ msgb_tv_push(msg, BSSAP_MSG_BSS_MANAGEMENT, msgb_length(msg));
+
+ return msg;
+}
+
void gsm0808_prepend_dtap_header(struct msgb *msg, uint8_t link_id)
{
uint8_t *hh = msgb_push(msg, 3);
diff --git a/src/gsm/libosmogsm.map b/src/gsm/libosmogsm.map
index 786bf08b..ec234189 100644
--- a/src/gsm/libosmogsm.map
+++ b/src/gsm/libosmogsm.map
@@ -135,6 +135,7 @@ gsm0808_create_classmark_update;
gsm0808_create_clear_command;
gsm0808_create_clear_complete;
gsm0808_create_clear_rqst;
+gsm0808_create_paging;
gsm0808_create_dtap;
gsm0808_create_layer3;
gsm0808_create_layer3_aoip;