From 51d2a33542064e8605302a22214f57f7886c703e Mon Sep 17 00:00:00 2001 From: Philipp Maier Date: Mon, 12 Jun 2017 19:09:43 +0200 Subject: osmo-bsc: react on reset requests from MSC The bsc side currently can not receive reset commands from an MSC. This patch adds required functionality to receive a reset command and acknowlege it properly. The effects are the same as with when sending resets (all drop all ongoing calls and sccp connections) --- openbsc/src/osmo-bsc/osmo_bsc_bssap.c | 21 +++++++++++++++++++++ openbsc/src/osmo-bsc/osmo_bsc_sigtran.c | 27 ++++++++++++++++++++++----- 2 files changed, 43 insertions(+), 5 deletions(-) (limited to 'openbsc/src') diff --git a/openbsc/src/osmo-bsc/osmo_bsc_bssap.c b/openbsc/src/osmo-bsc/osmo_bsc_bssap.c index f08811498..afa81b0e5 100644 --- a/openbsc/src/osmo-bsc/osmo_bsc_bssap.c +++ b/openbsc/src/osmo-bsc/osmo_bsc_bssap.c @@ -203,6 +203,24 @@ static int bssmap_handle_reset_ack(struct bsc_msc_data *msc, return 0; } +/* Handle MSC sided reset */ +static int bssmap_handle_reset(struct bsc_msc_data *msc, + struct msgb *msg, unsigned int length) +{ + LOGP(DMSC, LOGL_NOTICE, "Reset from MSC No.: %i\n", msc->nr); + + /* Instruct the bsc to close all open sigtran connections and to + * close all active channels on the BTS side as well */ + osmo_bsc_sigtran_reset(msc); + + /* Inform the MSC that we have received the reset request and + * that we acted accordingly */ + osmo_bsc_sigtran_tx_reset_ack(msc); + + return 0; +} + + /* GSM 08.08 ยง 3.2.1.19 */ static int bssmap_handle_paging(struct bsc_msc_data *msc, struct msgb *msg, unsigned int payload_length) @@ -553,6 +571,9 @@ static int bssmap_rcvmsg_udt(struct bsc_msc_data *msc, case BSS_MAP_MSG_RESET_ACKNOWLEDGE: ret = bssmap_handle_reset_ack(msc, msg, length); break; + case BSS_MAP_MSG_RESET: + ret = bssmap_handle_reset(msc, msg, length); + break; case BSS_MAP_MSG_PAGING: ret = bssmap_handle_paging(msc, msg, length); break; diff --git a/openbsc/src/osmo-bsc/osmo_bsc_sigtran.c b/openbsc/src/osmo-bsc/osmo_bsc_sigtran.c index 7afe71ee3..80dac828d 100644 --- a/openbsc/src/osmo-bsc/osmo_bsc_sigtran.c +++ b/openbsc/src/osmo-bsc/osmo_bsc_sigtran.c @@ -85,6 +85,17 @@ static void osmo_bsc_sigtran_tx_reset(struct bsc_msc_data *msc) &msc->msc_con->g_called_addr, msg); } +/* Send reset-ack to MSC */ +void osmo_bsc_sigtran_tx_reset_ack(struct bsc_msc_data *msc) +{ + struct msgb *msg; + LOGP(DMSC, LOGL_NOTICE, "Sending RESET RACK to MSC No.: %i\n", msc->nr); + msg = gsm0808_create_reset_ack(); + osmo_sccp_tx_unitdata_msg(msc->msc_con->sccp_user, &msc->msc_con->g_calling_addr, + &msc->msc_con->g_called_addr, msg); +} + + /* Find an MSC by its sigtran point code */ static struct bsc_msc_data *get_msc_by_addr(struct osmo_sccp_addr *calling_addr) { @@ -347,14 +358,11 @@ static void bsc_notify_msc_lost(struct osmo_bsc_sccp_con *con) bsc_send_ussd_release_complete(conn); } - -/* Callback function: Close all open connections */ -static void osmo_bsc_sigtran_reset_cb(void *priv) +/* Close all open sigtran connections and channels */ +void osmo_bsc_sigtran_reset(struct bsc_msc_data *msc) { struct osmo_bsc_sccp_con *conn; struct osmo_bsc_sccp_con *conn_temp; - struct bsc_msc_data *msc = (struct bsc_msc_data*) priv; - OSMO_ASSERT(msc); /* Close all open connections */ @@ -365,6 +373,15 @@ static void osmo_bsc_sigtran_reset_cb(void *priv) osmo_bsc_sigtran_del_conn(conn); } msc->msc_con->conn_id_counter = 0; +} + +/* Callback function: Close all open connections */ +static void osmo_bsc_sigtran_reset_cb(void *priv) +{ + struct bsc_msc_data *msc = (struct bsc_msc_data*) priv; + + /* Shut down all ongoint traffic */ + osmo_bsc_sigtran_reset(msc); /* Send reset to MSC */ osmo_bsc_sigtran_tx_reset(msc); -- cgit v1.2.3