move openbsc/* to repos root

This is the first step in creating this repository from the legacy openbsc.git.

Like all other Osmocom repositories, keep the autoconf and automake files in
the repository root. openbsc.git has been the sole exception, which ends now.

Change-Id: I9c6f2a448d9cb1cc088cf1cf6918b69d7e69b4e7

1 files changed, 168 insertions, 0 deletions

diff --git a/src/libbsc/bsc_subscriber.c b/src/libbsc/bsc_subscriber.c
new file mode 100644
index 000000000..73e61e801
--- /dev/null
+++ b/src/libbsc/bsc_subscriber.c
@@ -0,0 +1,168 @@
+/* GSM subscriber details for use in BSC land */
+
+/*
+ * (C) 2016 by sysmocom s.f.m.c. GmbH <info@sysmocom.de>
+ *
+ * Author: Neels Hofmeyr <nhofmeyr@sysmocom.de>
+ *
+ * All Rights Reserved
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include <talloc.h>
+#include <string.h>
+#include <limits.h>
+
+#include <osmocom/gsm/gsm48.h>
+#include <osmocom/core/logging.h>
+
+#include <openbsc/bsc_subscriber.h>
+#include <openbsc/debug.h>
+
+static struct bsc_subscr *bsc_subscr_alloc(struct llist_head *list)
+{
+	struct bsc_subscr *bsub;
+
+	bsub = talloc_zero(list, struct bsc_subscr);
+	if (!bsub)
+		return NULL;
+
+	llist_add_tail(&bsub->entry, list);
+	bsub->use_count = 1;
+
+	return bsub;
+}
+
+struct bsc_subscr *bsc_subscr_find_by_imsi(struct llist_head *list,
+					   const char *imsi)
+{
+	struct bsc_subscr *bsub;
+
+	if (!imsi || !*imsi)
+		return NULL;
+
+	llist_for_each_entry(bsub, list, entry) {
+		if (!strcmp(bsub->imsi, imsi))
+			return bsc_subscr_get(bsub);
+	}
+	return NULL;
+}
+
+struct bsc_subscr *bsc_subscr_find_by_tmsi(struct llist_head *list,
+					   uint32_t tmsi)
+{
+	struct bsc_subscr *bsub;
+
+	if (tmsi == GSM_RESERVED_TMSI)
+		return NULL;
+
+	llist_for_each_entry(bsub, list, entry) {
+		if (bsub->tmsi == tmsi)
+			return bsc_subscr_get(bsub);
+	}
+	return NULL;
+}
+
+void bsc_subscr_set_imsi(struct bsc_subscr *bsub, const char *imsi)
+{
+	if (!bsub)
+		return;
+	osmo_strlcpy(bsub->imsi, imsi, sizeof(bsub->imsi));
+}
+
+struct bsc_subscr *bsc_subscr_find_or_create_by_imsi(struct llist_head *list,
+						     const char *imsi)
+{
+	struct bsc_subscr *bsub;
+	bsub = bsc_subscr_find_by_imsi(list, imsi);
+	if (bsub)
+		return bsub;
+	bsub = bsc_subscr_alloc(list);
+	bsc_subscr_set_imsi(bsub, imsi);
+	return bsub;
+}
+
+struct bsc_subscr *bsc_subscr_find_or_create_by_tmsi(struct llist_head *list,
+						     uint32_t tmsi)
+{
+	struct bsc_subscr *bsub;
+	bsub = bsc_subscr_find_by_tmsi(list, tmsi);
+	if (bsub)
+		return bsub;
+	bsub = bsc_subscr_alloc(list);
+	bsub->tmsi = tmsi;
+	return bsub;
+}
+
+const char *bsc_subscr_name(struct bsc_subscr *bsub)
+{
+	static char buf[32];
+	if (!bsub)
+		return "unknown";
+	if (bsub->imsi[0])
+		snprintf(buf, sizeof(buf), "IMSI:%s", bsub->imsi);
+	else
+		snprintf(buf, sizeof(buf), "TMSI:0x%08x", bsub->tmsi);
+	return buf;
+}
+
+static void bsc_subscr_free(struct bsc_subscr *bsub)
+{
+	llist_del(&bsub->entry);
+	talloc_free(bsub);
+}
+
+struct bsc_subscr *_bsc_subscr_get(struct bsc_subscr *bsub,
+				   const char *file, int line)
+{
+	OSMO_ASSERT(bsub->use_count < INT_MAX);
+	bsub->use_count++;
+	LOGPSRC(DREF, LOGL_DEBUG, file, line,
+		"BSC subscr %s usage increases to: %d\n",
+		bsc_subscr_name(bsub), bsub->use_count);
+	return bsub;
+}
+
+struct bsc_subscr *_bsc_subscr_put(struct bsc_subscr *bsub,
+				   const char *file, int line)
+{
+	bsub->use_count--;
+	LOGPSRC(DREF, bsub->use_count >= 0? LOGL_DEBUG : LOGL_ERROR,
+		file, line,
+		"BSC subscr %s usage decreases to: %d\n",
+		bsc_subscr_name(bsub), bsub->use_count);
+	if (bsub->use_count <= 0)
+		bsc_subscr_free(bsub);
+	return NULL;
+}
+
+void log_set_filter_bsc_subscr(struct log_target *target,
+			       struct bsc_subscr *bsc_subscr)
+{
+	struct bsc_subscr **fsub = (void*)&target->filter_data[LOG_FLT_BSC_SUBSCR];
+
+	/* free the old data */
+	if (*fsub) {
+		bsc_subscr_put(*fsub);
+		*fsub = NULL;
+	}
+
+	if (bsc_subscr) {
+		target->filter_map |= (1 << LOG_FLT_BSC_SUBSCR);
+		*fsub = bsc_subscr_get(bsc_subscr);
+	} else
+		target->filter_map &= ~(1 << LOG_FLT_BSC_SUBSCR);
+}