ETWS Primary Notification via P1 Rest Octets

The ETWS (Earthquake and Tsunami Warning System) uses a so-called
ETWS Primary Notification which is sent
* to phones in dedicated mode (via DCCH from the BSC)
* to phones in idle mode (via P1 Rest Octets on PCH/CCCH)

This patch implements the second part of the functionality, i.e.
transmitting the related ETWS Primary Notification via PCH.  As
3GPP doesn't specify how this is communicated over Abis, we use
a new, vendor-specific RSL message type.

Closes: OS#4047
Depends: libosmocore I89c24a81ada6627694a9632e87485a61cbd3e680
Depends: libosmocore I36fc2ffc22728887d1cb8768c7fcd9739a8ec0fc

Change-Id: I18c60cdb86b9c19e09f5ec06d66e9b91608880e6

1 files changed, 10 insertions, 0 deletions

diff --git a/include/osmo-bts/gsm_data_shared.h b/include/osmo-bts/gsm_data_shared.h
index dd2a14c0..65e984d4 100644
--- a/include/osmo-bts/gsm_data_shared.h
+++ b/include/osmo-bts/gsm_data_shared.h
@@ -479,6 +479,7 @@ enum gsm_bts_features {
 	BTS_FEAT_SPEECH_F_EFR,
 	BTS_FEAT_SPEECH_F_AMR,
 	BTS_FEAT_SPEECH_H_AMR,
+	BTS_FEAT_ETWS_PN,
 	_NUM_BTS_FEAT
 };
 
@@ -718,6 +719,15 @@ struct gsm_bts {
 		uint64_t pch_msgs;
 	} agch_queue;
 
+	struct {
+		uint8_t *prim_notif;	/* ETWS primary notification (NULL if none) */
+		ssize_t prim_notif_len;	/* Length of prim_notif; expected 56 bytes */
+		uint8_t page_size;
+		uint8_t num_pages;	/* total number of pages */
+		uint8_t next_page;	/* next page number to be sent */
+		bool pni;		/* Primary Notification Identifier */
+	} etws;
+
 	struct paging_state *paging_state;
 	char *bsc_oml_host;
 	struct llist_head oml_queue;