diff options
Diffstat (limited to 'include/openbsc/rtp_proxy.h')
-rw-r--r-- | include/openbsc/rtp_proxy.h | 95 |
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 */ |