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-rw-r--r--openbsc/src/libmsc/gsm_subscriber.c130
1 files changed, 69 insertions, 61 deletions
diff --git a/openbsc/src/libmsc/gsm_subscriber.c b/openbsc/src/libmsc/gsm_subscriber.c
index f425058..f921018 100644
--- a/openbsc/src/libmsc/gsm_subscriber.c
+++ b/openbsc/src/libmsc/gsm_subscriber.c
@@ -40,33 +40,16 @@
#include <openbsc/db.h>
#include <openbsc/chan_alloc.h>
#include <openbsc/vlr.h>
+#include <openbsc/iu.h>
+#include <openbsc/osmo_msc.h>
+#include <openbsc/msc_ifaces.h>
void *tall_sub_req_ctx;
int gsm48_secure_channel(struct gsm_subscriber_connection *conn, int key_seq,
gsm_cbfn *cb, void *cb_data);
-static struct bsc_subscr *vlr_subscr_to_bsc_sub(struct llist_head *bsc_subscribers,
- struct vlr_subscr *vsub)
-{
- struct bsc_subscr *sub;
- /* TODO MSC split -- creating a BSC subscriber directly from MSC data
- * structures in RAM. At some point the MSC will send a message to the
- * BSC instead. */
- sub = bsc_subscr_find_or_create_by_imsi(bsc_subscribers, vsub->imsi);
- sub->tmsi = vsub->tmsi;
- sub->lac = vsub->lac;
- return sub;
-}
-
-#if 0
-TODO implement paging response in libmsc!
-Excluding this to be able to link without libbsc:
-
-/*
- * We got the channel assigned and can now hand this channel
- * over to one of our callbacks.
- */
+/* A connection is established and the paging callbacks may run now. */
int subscr_paging_dispatch(unsigned int hooknum, unsigned int event,
struct msgb *msg, void *data, void *param)
{
@@ -74,38 +57,42 @@ int subscr_paging_dispatch(unsigned int hooknum, unsigned int event,
struct gsm_subscriber_connection *conn = data;
struct vlr_subscr *vsub = param;
struct paging_signal_data sig_data;
- struct bsc_subscr *bsub;
- struct gsm_network *net;
- OSMO_ASSERT(vsub && vsub->cs.is_paging);
- net = vsub->vlr->user_ctx;
+ OSMO_ASSERT(vsub);
+ OSMO_ASSERT(hooknum == GSM_HOOK_RR_PAGING);
+ OSMO_ASSERT(!(conn && (conn->vsub != vsub)));
+ OSMO_ASSERT(!((event == GSM_PAGING_SUCCEEDED) && !conn));
+
+ LOGP(DPAG, LOGL_DEBUG, "Paging %s for %s (event=%d)\n",
+ event == GSM_PAGING_SUCCEEDED ? "success" : "failure",
+ vlr_subscr_name(vsub), event);
- /*
- * Stop paging on all other BTS. E.g. if this is
- * the first timeout on a BTS then the others will
- * timeout soon as well. Let's just stop everything
- * and forget we wanted to page.
- */
+ if (!vsub->cs.is_paging) {
+ LOGP(DPAG, LOGL_ERROR,
+ "Paging Response received for subscriber"
+ " that is not paging.\n");
+ return -EINVAL;
+ }
- bsub = vlr_subscr_to_bsc_sub(conn->network->bsc_subscribers, vsub);
- paging_request_stop(&net->bts_list, NULL, bsub, NULL, NULL);
- bsc_subscr_put(bsub);
+ if (event == GSM_PAGING_SUCCEEDED)
+ msc_stop_paging(vsub);
/* Inform parts of the system we don't know */
- sig_data.vsub = vsub;
- sig_data.bts = conn ? conn->bts : NULL;
- sig_data.conn = conn;
+ sig_data.vsub = vsub;
+ sig_data.conn = conn;
sig_data.paging_result = event;
- osmo_signal_dispatch(
- SS_PAGING,
- event == GSM_PAGING_SUCCEEDED ?
- S_PAGING_SUCCEEDED : S_PAGING_EXPIRED,
- &sig_data
- );
+ osmo_signal_dispatch(SS_PAGING,
+ event == GSM_PAGING_SUCCEEDED ?
+ S_PAGING_SUCCEEDED : S_PAGING_EXPIRED,
+ &sig_data);
llist_for_each_entry_safe(request, tmp, &vsub->cs.requests, entry) {
llist_del(&request->entry);
- request->cbfn(hooknum, event, msg, data, request->param);
+ if (request->cbfn) {
+ LOGP(DPAG, LOGL_DEBUG, "Calling paging cbfn.\n");
+ request->cbfn(hooknum, event, msg, data, request->param);
+ } else
+ LOGP(DPAG, LOGL_DEBUG, "Paging without action.\n");
talloc_free(request);
}
@@ -115,29 +102,48 @@ int subscr_paging_dispatch(unsigned int hooknum, unsigned int event,
return 0;
}
-struct subscr_request *subscr_request_channel(struct vlr_subscr *vsub,
- int channel_type,
- gsm_cbfn *cbfn, void *param)
+int msc_paging_request(struct vlr_subscr *vsub)
+{
+ /* The subscriber was last seen in subscr->lac. Find out which
+ * BSCs/RNCs are responsible and send them a paging request via open
+ * SCCP connections (if any). */
+ /* TODO Implementing only RNC paging, since this is code on the iu branch.
+ * Need to add BSC paging at some point. */
+ switch (vsub->cs.attached_via_ran) {
+ case RAN_GERAN_A:
+ return a_page(vsub->imsi, vsub->tmsi, vsub->lac);
+ case RAN_UTRAN_IU:
+ return iu_page_cs(vsub->imsi,
+ vsub->tmsi == GSM_RESERVED_TMSI?
+ NULL : &vsub->tmsi,
+ vsub->lac);
+ default:
+ break;
+ }
+
+ LOGP(DPAG, LOGL_ERROR, "%s: Cannot page, subscriber not attached\n",
+ vlr_subscr_name(vsub));
+ return -EINVAL;
+}
+
+/*! \brief Start a paging request for vsub, call cbfn(param) when done.
+ * \param vsub subscriber to page.
+ * \param cbfn function to call when the conn is established.
+ * \param param caller defined param to pass to cbfn().
+ * \param label human readable label of the request kind used for logging.
+ */
+struct subscr_request *subscr_request_conn(struct vlr_subscr *vsub,
+ gsm_cbfn *cbfn, void *param,
+ const char *label)
{
int rc;
struct subscr_request *request;
- struct bsc_subscr *bsub;
- struct gsm_network *net = vsub->vlr->user_ctx;
/* Start paging.. we know it is async so we can do it before */
if (!vsub->cs.is_paging) {
- LOGP(DMM, LOGL_DEBUG, "Subscriber %s not paged yet.\n",
+ LOGP(DMM, LOGL_DEBUG, "Subscriber %s not paged yet, start paging.\n",
vlr_subscr_name(vsub));
-#if 0
- TODO implement paging response in libmsc!
- Excluding this to be able to link without libbsc:
-
- bsub = vlr_subscr_to_bsc_sub(net->bsc_subscribers, vsub);
- rc = paging_request(net, bsub, channel_type, NULL, NULL);
- bsc_subscr_put(bsub);
-#else
- rc = -ENOTSUP;
-#endif
+ rc = msc_paging_request(vsub);
if (rc <= 0) {
LOGP(DMM, LOGL_ERROR, "Subscriber %s paging failed: %d\n",
vlr_subscr_name(vsub), rc);
@@ -146,6 +152,9 @@ struct subscr_request *subscr_request_channel(struct vlr_subscr *vsub,
/* reduced on the first paging callback */
vlr_subscr_get(vsub);
vsub->cs.is_paging = true;
+ } else {
+ LOGP(DMM, LOGL_DEBUG, "Subscriber %s already paged.\n",
+ vlr_subscr_name(vsub));
}
/* TODO: Stop paging in case of memory allocation failure */
@@ -177,4 +186,3 @@ struct gsm_subscriber_connection *connection_for_subscr(struct vlr_subscr *vsub)
return NULL;
}
-#endif