| #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 */ |