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Diffstat (limited to 'include/openbsc/mgcp.h')
| -rw-r--r-- | include/openbsc/mgcp.h | 300 |
1 files changed, 0 insertions, 300 deletions
diff --git a/include/openbsc/mgcp.h b/include/openbsc/mgcp.h deleted file mode 100644 index 7cf83b27c..000000000 --- a/include/openbsc/mgcp.h +++ /dev/null @@ -1,300 +0,0 @@ -/* A Media Gateway Control Protocol Media Gateway: RFC 3435 */ - -/* - * (C) 2009-2012 by Holger Hans Peter Freyther <zecke@selfish.org> - * (C) 2009-2012 by On-Waves - * 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/>. - * - */ - -#ifndef OPENBSC_MGCP_H -#define OPENBSC_MGCP_H - -#include <osmocom/core/msgb.h> -#include <osmocom/core/write_queue.h> -#include <osmocom/core/timer.h> - -#include "debug.h" - -#include <arpa/inet.h> -#include <sys/types.h> -#include <sys/socket.h> -#include <netinet/in.h> - -#define RTP_PORT_DEFAULT 4000 -#define RTP_PORT_NET_DEFAULT 16000 - -/** - * Calculate the RTP audio port for the given multiplex - * and the direction. This allows a semi static endpoint - * to port calculation removing the need for the BSC - * and the MediaGateway to communicate. - * - * Port usage explained: - * base + (multiplex * 2) + 0 == local port to wait for network packets - * base + (multiplex * 2) + 1 == local port for rtcp - * - * The above port will receive packets from the BTS that need - * to be patched and forwarded to the network. - * The above port will receive packets from the network that - * need to be patched and forwarded to the BTS. - * - * We assume to have a static BTS IP address so we can differentiate - * network and BTS. - * - */ -static inline int rtp_calculate_port(int multiplex, int base) -{ - return base + (multiplex * 2); -} - - -/* - * Handling of MGCP Endpoints and the MGCP Config - */ -struct mgcp_endpoint; -struct mgcp_config; -struct mgcp_trunk_config; -struct mgcp_rtp_end; - -#define MGCP_ENDP_CRCX 1 -#define MGCP_ENDP_DLCX 2 -#define MGCP_ENDP_MDCX 3 - -/* - * what to do with the msg? - * - continue as usual? - * - reject and send a failure code? - * - defer? do not send anything - */ -#define MGCP_POLICY_CONT 4 -#define MGCP_POLICY_REJECT 5 -#define MGCP_POLICY_DEFER 6 - -typedef int (*mgcp_realloc)(struct mgcp_trunk_config *cfg, int endpoint); -typedef int (*mgcp_change)(struct mgcp_trunk_config *cfg, int endpoint, int state); -typedef int (*mgcp_policy)(struct mgcp_trunk_config *cfg, int endpoint, int state, const char *transactio_id); -typedef int (*mgcp_reset)(struct mgcp_trunk_config *cfg); -typedef int (*mgcp_rqnt)(struct mgcp_endpoint *endp, char tone); - -/** - * Return: - * < 0 in case no audio was processed - * >= 0 in case audio was processed. The remaining payload - * length will be returned. - */ -typedef int (*mgcp_processing)(struct mgcp_endpoint *endp, - struct mgcp_rtp_end *dst_end, - char *data, int *len, int buf_size); -typedef int (*mgcp_processing_setup)(struct mgcp_endpoint *endp, - struct mgcp_rtp_end *dst_end, - struct mgcp_rtp_end *src_end); - -typedef void (*mgcp_get_format)(struct mgcp_endpoint *endp, - int *payload_type, - const char**subtype_name, - const char**fmtp_extra); - -#define PORT_ALLOC_STATIC 0 -#define PORT_ALLOC_DYNAMIC 1 - -/** - * This holds information on how to allocate ports - */ -struct mgcp_port_range { - int mode; - - /* addr or NULL to fall-back to default */ - char *bind_addr; - - /* pre-allocated from a base? */ - int base_port; - - /* dynamically allocated */ - int range_start; - int range_end; - int last_port; -}; - -#define MGCP_KEEPALIVE_ONCE (-1) - -struct mgcp_trunk_config { - struct llist_head entry; - - struct mgcp_config *cfg; - - int trunk_nr; - int trunk_type; - - char *audio_fmtp_extra; - char *audio_name; - int audio_payload; - int audio_send_ptime; - int audio_send_name; - int audio_loop; - - int no_audio_transcoding; - - int omit_rtcp; - int keepalive_interval; - - /* RTP patching */ - int force_constant_ssrc; /* 0: don't, 1: once */ - int force_aligned_timing; - - /* spec handling */ - int force_realloc; - - /* timer */ - struct osmo_timer_list keepalive_timer; - - unsigned int number_endpoints; - struct mgcp_endpoint *endpoints; -}; - -enum mgcp_role { - MGCP_BSC = 0, - MGCP_BSC_NAT, -}; - -enum mgcp_connection_mode { - MGCP_CONN_NONE = 0, - MGCP_CONN_RECV_ONLY = 1, - MGCP_CONN_SEND_ONLY = 2, - MGCP_CONN_RECV_SEND = MGCP_CONN_RECV_ONLY | MGCP_CONN_SEND_ONLY, - MGCP_CONN_LOOPBACK = 4 | MGCP_CONN_RECV_SEND, -}; - -extern const struct value_string mgcp_connection_mode_strs[]; - -static inline const char *mgcp_cmode_name(enum mgcp_connection_mode mode) -{ - return get_value_string(mgcp_connection_mode_strs, mode); -} - -struct mgcp_config { - int source_port; - char *local_ip; - char *source_addr; - char *bts_ip; - char *call_agent_addr; - - struct in_addr bts_in; - - /* transcoder handling */ - char *transcoder_ip; - struct in_addr transcoder_in; - int transcoder_remote_base; - - /* RTP processing */ - mgcp_processing rtp_processing_cb; - mgcp_processing_setup setup_rtp_processing_cb; - - mgcp_get_format get_net_downlink_format_cb; - - struct osmo_wqueue gw_fd; - - struct mgcp_port_range bts_ports; - struct mgcp_port_range net_ports; - struct mgcp_port_range transcoder_ports; - int endp_dscp; - - int bts_force_ptime; - - mgcp_change change_cb; - mgcp_policy policy_cb; - mgcp_reset reset_cb; - mgcp_realloc realloc_cb; - mgcp_rqnt rqnt_cb; - void *data; - - uint32_t last_call_id; - - /* trunk handling */ - struct mgcp_trunk_config trunk; - struct llist_head trunks; - - /* only used for start with a static configuration */ - int last_net_port; - int last_bts_port; - - enum mgcp_role role; - - /* osmux translator: 0 means disabled, 1 means enabled */ - int osmux; - /* addr to bind the server to */ - char *osmux_addr; - /* The BSC-NAT may ask for enabling osmux on demand. This tells us if - * the osmux socket is already initialized. - */ - int osmux_init; - /* osmux batch factor: from 1 to 4 maximum */ - int osmux_batch; - /* osmux batch size (in bytes) */ - int osmux_batch_size; - /* osmux port */ - uint16_t osmux_port; - /* Pad circuit with dummy messages until we see the first voice - * message. - */ - uint16_t osmux_dummy; -}; - -/* config management */ -struct mgcp_config *mgcp_config_alloc(void); -int mgcp_parse_config(const char *config_file, struct mgcp_config *cfg, - enum mgcp_role role); -int mgcp_vty_init(void); -int mgcp_endpoints_allocate(struct mgcp_trunk_config *cfg); -void mgcp_release_endp(struct mgcp_endpoint *endp); -void mgcp_initialize_endp(struct mgcp_endpoint *endp); -int mgcp_reset_transcoder(struct mgcp_config *cfg); -void mgcp_format_stats(struct mgcp_endpoint *endp, char *stats, size_t size); -int mgcp_parse_stats(struct msgb *msg, uint32_t *ps, uint32_t *os, uint32_t *pr, uint32_t *_or, int *loss, uint32_t *jitter); - -void mgcp_trunk_set_keepalive(struct mgcp_trunk_config *tcfg, int interval); - -/* - * format helper functions - */ -struct msgb *mgcp_handle_message(struct mgcp_config *cfg, struct msgb *msg); - -/* adc helper */ -static inline int mgcp_timeslot_to_endpoint(int multiplex, int timeslot) -{ - if (timeslot == 0) { - LOGP(DMGCP, LOGL_ERROR, "Timeslot should not be 0\n"); - timeslot = 255; - } - - return timeslot + (32 * multiplex); -} - -static inline void mgcp_endpoint_to_timeslot(int endpoint, int *multiplex, int *timeslot) -{ - *multiplex = endpoint / 32; - *timeslot = endpoint % 32; -} - -int mgcp_send_reset_ep(struct mgcp_endpoint *endp, int endpoint); -int mgcp_send_reset_all(struct mgcp_config *cfg); - - -int mgcp_create_bind(const char *source_addr, struct osmo_fd *fd, int port); -int mgcp_send(struct mgcp_endpoint *endp, int dest, int is_rtp, struct sockaddr_in *addr, char *buf, int rc); -int mgcp_udp_send(int fd, struct in_addr *addr, int port, char *buf, int len); - -#endif |