<p>laforge has uploaded this change for <strong>review</strong>.</p><p><a href="https://gerrit.osmocom.org/c/osmo-bsc/+/15437">View Change</a></p><pre style="font-family: monospace,monospace; white-space: pre-wrap;">SMSCB: Send ETWS primary warning message via all dedicated channels<br><br>As soon as we have received an ETWS primary notification message from<br>the CBC, we should transmit it as "RR Application Information" to all<br>dedicated channels.<br><br>Change-Id: I913d0237cffdcb95037da8489acef5f32a7fc02e<br>---<br>M include/osmocom/bsc/gsm_04_08_rr.h<br>M src/osmo-bsc/gsm_04_08_rr.c<br>M src/osmo-bsc/smscb.c<br>3 files changed, 85 insertions(+), 2 deletions(-)<br><br></pre><pre style="font-family: monospace,monospace; white-space: pre-wrap;">git pull ssh://gerrit.osmocom.org:29418/osmo-bsc refs/changes/37/15437/1</pre><pre style="font-family: monospace,monospace; white-space: pre-wrap;"><span>diff --git a/include/osmocom/bsc/gsm_04_08_rr.h b/include/osmocom/bsc/gsm_04_08_rr.h</span><br><span>index 8e4f787..f0c0f42 100644</span><br><span>--- a/include/osmocom/bsc/gsm_04_08_rr.h</span><br><span>+++ b/include/osmocom/bsc/gsm_04_08_rr.h</span><br><span>@@ -29,6 +29,8 @@</span><br><span> int gsm48_send_ho_cmd(struct gsm_lchan *old_lchan, struct gsm_lchan *new_lchan,</span><br><span> uint8_t power_command, uint8_t ho_ref);</span><br><span> int gsm48_send_rr_ass_cmd(struct gsm_lchan *dest_lchan, struct gsm_lchan *lchan, uint8_t power_command);</span><br><span style="color: hsl(120, 100%, 40%);">+int gsm48_send_rr_app_info(struct gsm_lchan *lchan, uint8_t apdu_id, uint8_t apdu_flags,</span><br><span style="color: hsl(120, 100%, 40%);">+ const uint8_t *apdu_data, ssize_t apdu_data_len);</span><br><span> int gsm48_lchan_modify(struct gsm_lchan *lchan, uint8_t mode);</span><br><span> int gsm48_rx_rr_modif_ack(struct msgb *msg);</span><br><span> int gsm48_parse_meas_rep(struct gsm_meas_rep *rep, struct msgb *msg);</span><br><span>diff --git a/src/osmo-bsc/gsm_04_08_rr.c b/src/osmo-bsc/gsm_04_08_rr.c</span><br><span>index 7ff94ad..1fbbb57 100644</span><br><span>--- a/src/osmo-bsc/gsm_04_08_rr.c</span><br><span>+++ b/src/osmo-bsc/gsm_04_08_rr.c</span><br><span>@@ -592,6 +592,28 @@</span><br><span> return gsm48_sendmsg(msg);</span><br><span> }</span><br><span> </span><br><span style="color: hsl(120, 100%, 40%);">+/* TS 44.018 section 9.1.53 */</span><br><span style="color: hsl(120, 100%, 40%);">+int gsm48_send_rr_app_info(struct gsm_lchan *lchan, uint8_t apdu_id, uint8_t apdu_flags,</span><br><span style="color: hsl(120, 100%, 40%);">+ const uint8_t *apdu_data, ssize_t apdu_data_len)</span><br><span style="color: hsl(120, 100%, 40%);">+{</span><br><span style="color: hsl(120, 100%, 40%);">+ struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 APP INFO");</span><br><span style="color: hsl(120, 100%, 40%);">+ struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh));</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ if ((apdu_id & 0xF0) || (apdu_flags & 0xF0)) {</span><br><span style="color: hsl(120, 100%, 40%);">+ msgb_free(msg);</span><br><span style="color: hsl(120, 100%, 40%);">+ return -EINVAL;</span><br><span style="color: hsl(120, 100%, 40%);">+ }</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ msg->lchan = lchan;</span><br><span style="color: hsl(120, 100%, 40%);">+ gh->proto_discr = GSM48_PDISC_RR;</span><br><span style="color: hsl(120, 100%, 40%);">+ gh->msg_type = GSM48_MT_RR_APP_INFO;</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ msgb_put_u8(msg, (apdu_flags << 4) | apdu_id);</span><br><span style="color: hsl(120, 100%, 40%);">+ msgb_lv_put(msg, apdu_data_len, apdu_data);</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ return gsm48_sendmsg(msg);</span><br><span style="color: hsl(120, 100%, 40%);">+}</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span> /* 9.1.5 Channel mode modify: Modify the mode on the MS side */</span><br><span> int gsm48_lchan_modify(struct gsm_lchan *lchan, uint8_t mode)</span><br><span> {</span><br><span>diff --git a/src/osmo-bsc/smscb.c b/src/osmo-bsc/smscb.c</span><br><span>index 6b96086..319ef21 100644</span><br><span>--- a/src/osmo-bsc/smscb.c</span><br><span>+++ b/src/osmo-bsc/smscb.c</span><br><span>@@ -25,10 +25,12 @@</span><br><span> #include <osmocom/core/select.h></span><br><span> #include <osmocom/core/msgb.h></span><br><span> #include <osmocom/core/talloc.h></span><br><span style="color: hsl(120, 100%, 40%);">+#include <osmocom/core/byteswap.h></span><br><span> </span><br><span> #include <osmocom/gsm/cbsp.h></span><br><span> #include <osmocom/gsm/protocol/gsm_23_041.h></span><br><span> #include <osmocom/gsm/protocol/gsm_48_049.h></span><br><span style="color: hsl(120, 100%, 40%);">+#include <osmocom/gsm/protocol/gsm_03_41.h></span><br><span> </span><br><span> #include <osmocom/netif/stream.h></span><br><span> </span><br><span>@@ -36,6 +38,8 @@</span><br><span> #include <osmocom/bsc/gsm_data.h></span><br><span> #include <osmocom/bsc/smscb.h></span><br><span> #include <osmocom/bsc/vty.h></span><br><span style="color: hsl(120, 100%, 40%);">+#include <osmocom/bsc/gsm_04_08_rr.h></span><br><span style="color: hsl(120, 100%, 40%);">+#include <osmocom/bsc/lchan_fsm.h></span><br><span> </span><br><span> /*********************************************************************************</span><br><span> * Helper Functions</span><br><span>@@ -52,6 +56,26 @@</span><br><span> INIT_LLIST_HEAD(old);</span><br><span> }</span><br><span> </span><br><span style="color: hsl(120, 100%, 40%);">+#define ETWS_PRIM_NOTIF_SIZE 56</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+/* Build a ETWS Primary Notification message as per TS 23.041 9.4.1.3 */</span><br><span style="color: hsl(120, 100%, 40%);">+static int gen_etws_primary_notification(uint8_t *out, uint16_t serial_nr, uint16_t msg_id,</span><br><span style="color: hsl(120, 100%, 40%);">+ uint16_t warn_type, const uint8_t *sec_info)</span><br><span style="color: hsl(120, 100%, 40%);">+{</span><br><span style="color: hsl(120, 100%, 40%);">+ struct gsm341_etws_message *etws = (struct gsm341_etws_message *)out;</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ memset(out, 0, ETWS_PRIM_NOTIF_SIZE);</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ osmo_store16be(serial_nr, out);</span><br><span style="color: hsl(120, 100%, 40%);">+ etws->msg_id = osmo_htons(msg_id);</span><br><span style="color: hsl(120, 100%, 40%);">+ etws->warning_type = osmo_htons(warn_type);</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ if (sec_info)</span><br><span style="color: hsl(120, 100%, 40%);">+ memcpy(etws->data, sec_info, ETWS_PRIM_NOTIF_SIZE - sizeof(*etws));</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ return ETWS_PRIM_NOTIF_SIZE;</span><br><span style="color: hsl(120, 100%, 40%);">+}</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span> /*! Obtain SMSCB Channel State for given BTS (basic or extended CBCH) */</span><br><span> struct bts_smscb_chan_state *bts_get_smscb_chan(struct gsm_bts *bts, bool extended)</span><br><span> {</span><br><span>@@ -437,6 +461,39 @@</span><br><span> * Per-BTS Processing of CBSP from CBC, called via cbsp_per_bts()</span><br><span> *********************************************************************************/</span><br><span> </span><br><span style="color: hsl(120, 100%, 40%);">+static void etws_primary_to_dedicated(struct gsm_bts *bts,</span><br><span style="color: hsl(120, 100%, 40%);">+ const struct osmo_cbsp_write_replace *wrepl)</span><br><span style="color: hsl(120, 100%, 40%);">+{</span><br><span style="color: hsl(120, 100%, 40%);">+ uint8_t etws_primary[ETWS_PRIM_NOTIF_SIZE];</span><br><span style="color: hsl(120, 100%, 40%);">+ struct gsm_bts_trx *trx;</span><br><span style="color: hsl(120, 100%, 40%);">+ unsigned int count = 0;</span><br><span style="color: hsl(120, 100%, 40%);">+ int i, j;</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ gen_etws_primary_notification(etws_primary, wrepl->new_serial_nr, wrepl->msg_id,</span><br><span style="color: hsl(120, 100%, 40%);">+ wrepl->u.emergency.warning_type,</span><br><span style="color: hsl(120, 100%, 40%);">+ wrepl->u.emergency.warning_sec_info);</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ /* iterate over all lchan in each TS in each TRX of this BTS */</span><br><span style="color: hsl(120, 100%, 40%);">+ llist_for_each_entry(trx, &bts->trx_list, list) {</span><br><span style="color: hsl(120, 100%, 40%);">+ for (i = 0; i < ARRAY_SIZE(trx->ts); i++) {</span><br><span style="color: hsl(120, 100%, 40%);">+ struct gsm_bts_trx_ts *ts = &trx->ts[i];</span><br><span style="color: hsl(120, 100%, 40%);">+ for (j = 0; j < ARRAY_SIZE(ts->lchan); j++) {</span><br><span style="color: hsl(120, 100%, 40%);">+ struct gsm_lchan *lchan = &ts->lchan[j];</span><br><span style="color: hsl(120, 100%, 40%);">+ if (!lchan_may_receive_data(lchan))</span><br><span style="color: hsl(120, 100%, 40%);">+ continue;</span><br><span style="color: hsl(120, 100%, 40%);">+ gsm48_send_rr_app_info(lchan, 0x1, 0x0, etws_primary,</span><br><span style="color: hsl(120, 100%, 40%);">+ sizeof(etws_primary));</span><br><span style="color: hsl(120, 100%, 40%);">+ count++;</span><br><span style="color: hsl(120, 100%, 40%);">+ }</span><br><span style="color: hsl(120, 100%, 40%);">+ }</span><br><span style="color: hsl(120, 100%, 40%);">+ }</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ LOG_BTS(bts, DCBS, LOGL_NOTICE, "Sent ETWS Primary Notification via %u dedicated channels\n",</span><br><span style="color: hsl(120, 100%, 40%);">+ count);</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ /* FIXME: Notify BTS of primary ETWS notification via vendor-specific Abis message */</span><br><span style="color: hsl(120, 100%, 40%);">+}</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span> /*! Try to execute a write-replace operation; roll-back if it fails.</span><br><span> * \param[in] chan_state BTS CBCH channel state</span><br><span> * \param[in] extended_cbch Basic (false) or Extended (true) CBCH</span><br><span>@@ -506,8 +563,10 @@</span><br><span> int rc;</span><br><span> </span><br><span> if (!wrepl->is_cbs) {</span><br><span style="color: hsl(0, 100%, 40%);">- LOG_BTS(bts, DCBS, LOGL_ERROR, "(Primary) Emergency Message not supported\n");</span><br><span style="color: hsl(0, 100%, 40%);">- return -CBSP_CAUSE_CB_NOT_SUPPORTED;</span><br><span style="color: hsl(120, 100%, 40%);">+ /* send through any active dedicated channels of this BTS */</span><br><span style="color: hsl(120, 100%, 40%);">+ etws_primary_to_dedicated(bts, wrepl);</span><br><span style="color: hsl(120, 100%, 40%);">+ /* TODO: send via RSL to BTS for transmission on PCH */</span><br><span style="color: hsl(120, 100%, 40%);">+ return 0;</span><br><span> }</span><br><span> </span><br><span> /* check if cell has a CBCH at all */</span><br><span></span><br></pre><p>To view, visit <a href="https://gerrit.osmocom.org/c/osmo-bsc/+/15437">change 15437</a>. 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<div style="display:none"> Gerrit-Project: osmo-bsc </div>
<div style="display:none"> Gerrit-Branch: master </div>
<div style="display:none"> Gerrit-Change-Id: I913d0237cffdcb95037da8489acef5f32a7fc02e </div>
<div style="display:none"> Gerrit-Change-Number: 15437 </div>
<div style="display:none"> Gerrit-PatchSet: 1 </div>
<div style="display:none"> Gerrit-Owner: laforge <laforge@gnumonks.org> </div>
<div style="display:none"> Gerrit-MessageType: newchange </div>