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, 95 insertions, 0 deletions

diff --git a/include/openbsc/rtp_proxy.h b/include/openbsc/rtp_proxy.h
new file mode 100644
index 000000000..52ffefd27
--- /dev/null
+++ b/include/openbsc/rtp_proxy.h
@@ -0,0 +1,95 @@
+#ifndef _RTP_PROXY_H
+#define _RTP_PROXY_H
+
+/* RTP proxy handling for ip.access nanoBTS */
+
+/* (C) 2009 by Harald Welte <laforge@gnumonks.org>
+ * 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 <netinet/in.h>
+
+#include <osmocom/core/linuxlist.h>
+#include <osmocom/core/select.h>
+
+#include <openbsc/mncc.h>
+
+#define RTP_PT_GSM_FULL 3
+#define RTP_PT_GSM_HALF 96
+#define RTP_PT_GSM_EFR 97
+#define RTP_PT_AMR 98
+#define RTP_LEN_GSM_FULL 33
+#define RTP_LEN_GSM_HALF 15
+#define RTP_LEN_GSM_EFR 31
+#define RTP_GSM_DURATION 160
+
+enum rtp_rx_action {
+	RTP_NONE,
+	RTP_PROXY,
+	RTP_RECV_UPSTREAM,
+};
+
+enum rtp_tx_action {
+	RTP_SEND_NONE,
+	RTP_SEND_DOWNSTREAM,
+};
+
+struct rtp_sub_socket {
+	struct sockaddr_in sin_local;
+	struct sockaddr_in sin_remote;
+
+	struct osmo_fd bfd;
+	/* linked list of to-be-transmitted msgb's */
+	struct llist_head tx_queue;
+};
+
+struct rtp_socket {
+	struct llist_head list;
+
+	struct rtp_sub_socket rtp;
+	struct rtp_sub_socket rtcp;
+
+	/* what should we do on receive? */
+	enum rtp_rx_action rx_action;
+	union {
+		struct {
+			struct rtp_socket *other_sock;
+		} proxy;
+		struct {
+			struct gsm_network *net;
+			uint32_t callref;
+		} receive;
+	};
+	enum rtp_tx_action tx_action;
+	struct {
+		uint16_t sequence;
+		uint32_t timestamp;
+		uint32_t ssrc;
+		struct timeval last_tv;
+	} transmit;
+};
+
+struct rtp_socket *rtp_socket_create(void);
+int rtp_socket_bind(struct rtp_socket *rs, uint32_t ip);
+int rtp_socket_connect(struct rtp_socket *rs, uint32_t ip, uint16_t port);
+int rtp_socket_proxy(struct rtp_socket *this, struct rtp_socket *other);
+int rtp_socket_upstream(struct rtp_socket *this, struct gsm_network *net, uint32_t callref);
+int rtp_socket_free(struct rtp_socket *rs);
+int rtp_send_frame(struct rtp_socket *rs, struct gsm_data_frame *frame);
+
+#endif /* _RTP_PROXY_H */