1 files changed, 115 insertions, 0 deletions
diff --git a/src/osmo-bts-sysmo/oml_router.c b/src/osmo-bts-sysmo/oml_router.c
new file mode 100644
index 00000000..64b36840
--- /dev/null
+++ b/src/osmo-bts-sysmo/oml_router.c
@@ -0,0 +1,115 @@
+/* Beginnings of an OML router */
+
+/* (C) 2014 by sysmocom s.f.m.c. GmbH
+ *
+ * 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 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 "oml_router.h"
+
+#include <osmo-bts/bts.h>
+#include <osmo-bts/logging.h>
+#include <osmo-bts/oml.h>
+
+#include <osmocom/core/socket.h>
+#include <osmocom/core/select.h>
+
+#include <errno.h>
+#include <string.h>
+#include <unistd.h>
+
+static int oml_router_read_cb(struct osmo_fd *fd, unsigned int what)
+{
+	struct msgb *msg;
+	int rc;
+
+	msg = oml_msgb_alloc();
+	if (!msg) {
+		LOGP(DL1C, LOGL_ERROR, "Failed to allocate oml msgb.\n");
+		return -1;
+	}
+
+	rc = recv(fd->fd, msg->tail, msg->data_len, 0);
+	if (rc <= 0) {
+		close(fd->fd);
+		osmo_fd_unregister(fd);
+		fd->fd = -1;
+		goto err;
+	}
+
+	msgb_put(msg, rc);
+
+	/* todo analyze and dispatch message */
+
+err:
+	msgb_free(msg);
+	return -1;
+}
+
+static int oml_router_accept_cb(struct osmo_fd *accept_fd, unsigned int what)
+{
+	int fd;
+	struct osmo_fd *read_fd = (struct osmo_fd *) accept_fd->data;
+
+	/* Accept only one connection at a time. De-register it */
+	if (read_fd->fd > -1) {
+		LOGP(DL1C, LOGL_NOTICE,
+			"New OML router connection. Closing old one.\n");
+		close(read_fd->fd);
+		osmo_fd_unregister(read_fd);
+		read_fd->fd = -1;
+	}
+
+	fd = accept(accept_fd->fd, NULL, NULL);
+	if (fd < 0) {
+		LOGP(DL1C, LOGL_ERROR, "Failed to accept. errno: %s.\n",
+		     strerror(errno));
+		return -1;
+	}
+
+	read_fd->fd = fd;
+	if (osmo_fd_register(read_fd) != 0) {
+		LOGP(DL1C, LOGL_ERROR, "Registering the read fd failed.\n");
+		close(fd);
+		read_fd->fd = -1;
+		return -1;
+	}
+
+	return 0;
+}
+
+int oml_router_init(struct gsm_bts *bts,
+			struct osmo_fd *accept_fd, struct osmo_fd *read_fd)
+{
+	int rc;
+
+	memset(accept_fd, 0, sizeof(*accept_fd));
+	memset(read_fd, 0, sizeof(*read_fd));
+
+	accept_fd->cb = oml_router_accept_cb;
+	accept_fd->data = read_fd;
+
+	read_fd->cb = oml_router_read_cb;
+	read_fd->data = bts;
+	read_fd->when = BSC_FD_READ;
+	read_fd->fd = -1;
+
+	rc = osmo_sock_unix_init_ofd(accept_fd, SOCK_SEQPACKET, 0,
+					OML_ROUTER_PATH,
+					OSMO_SOCK_F_BIND | OSMO_SOCK_F_NONBLOCK);
+	return rc;
+}