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-rw-r--r--include/openbsc/rtp_proxy.h90
1 files changed, 90 insertions, 0 deletions
diff --git a/include/openbsc/rtp_proxy.h b/include/openbsc/rtp_proxy.h
new file mode 100644
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--- /dev/null
+++ b/include/openbsc/rtp_proxy.h
@@ -0,0 +1,90 @@
+#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 <osmocore/linuxlist.h>
+#include <osmocore/select.h>
+
+#define RTP_PT_GSM_FULL 3
+#define RTP_PT_GSM_HALF 96
+#define RTP_PT_GSM_EFR 97
+#define RTP_PT_AMR_FULL 98
+#define RTP_PT_AMR_HALF 99
+
+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 bsc_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;
+ u_int32_t callref;
+ } receive;
+ };
+ enum rtp_tx_action tx_action;
+ struct {
+ u_int16_t sequence;
+ u_int32_t timestamp;
+ u_int32_t ssrc;
+ struct timeval last_tv;
+ } transmit;
+};
+
+struct rtp_socket *rtp_socket_create(void);
+int rtp_socket_bind(struct rtp_socket *rs, u_int32_t ip);
+int rtp_socket_connect(struct rtp_socket *rs, u_int32_t ip, u_int16_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, u_int32_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 */