112 lines
3.1 KiB
C
112 lines
3.1 KiB
C
#pragma once
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#include <stdint.h>
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#include <osmocom/core/linuxlist.h>
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#include <osmocom/core/write_queue.h>
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enum mgcp_connection_mode;
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struct msgb;
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struct vty;
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#define MGCPGW_CLIENT_LOCAL_ADDR_DEFAULT "0.0.0.0"
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#define MGCPGW_CLIENT_LOCAL_PORT_DEFAULT 0
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#define MGCPGW_CLIENT_REMOTE_ADDR_DEFAULT "127.0.0.1"
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#define MGCPGW_CLIENT_REMOTE_PORT_DEFAULT 2427
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#define MSGB_CB_MGCP_TRANS_ID 0
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typedef unsigned int mgcp_trans_id_t;
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struct mgcpgw_client_conf {
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const char *local_addr;
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int local_port;
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const char *remote_addr;
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int remote_port;
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uint16_t first_endpoint;
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uint16_t last_endpoint;
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uint16_t bts_base;
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};
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struct mgcp_response_head {
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int response_code;
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mgcp_trans_id_t trans_id;
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const char *comment;
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};
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struct mgcp_response {
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char *body;
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struct mgcp_response_head head;
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uint16_t audio_port;
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};
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struct mgcpgw_client {
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struct mgcpgw_client_conf actual;
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uint32_t remote_addr;
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struct osmo_wqueue wq;
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mgcp_trans_id_t next_trans_id;
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struct llist_head responses_pending;
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struct llist_head inuse_endpoints;
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};
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struct mgcp_inuse_endpoint {
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struct llist_head entry;
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uint16_t id;
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};
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/* Invoked when an MGCP response is received or sending failed. When the
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* response is passed as NULL, this indicates failure during transmission. */
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typedef void (* mgcp_response_cb_t )(struct mgcp_response *response, void *priv);
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struct mgcp_response_pending {
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struct llist_head entry;
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mgcp_trans_id_t trans_id;
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mgcp_response_cb_t response_cb;
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void *priv;
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};
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void mgcpgw_client_conf_init(struct mgcpgw_client_conf *conf);
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struct mgcpgw_client *mgcpgw_client_init(void *ctx,
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struct mgcpgw_client_conf *conf);
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int mgcpgw_client_connect(struct mgcpgw_client *mgcp);
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const char *mgcpgw_client_remote_addr_str(struct mgcpgw_client *mgcp);
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uint16_t mgcpgw_client_remote_port(struct mgcpgw_client *mgcp);
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uint32_t mgcpgw_client_remote_addr_n(struct mgcpgw_client *mgcp);
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/* Find and seize an unsused endpoint id */
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int mgcpgw_client_next_endpoint(struct mgcpgw_client *client);
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/* Release a seized endpoint id to make it available again for other calls */
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void mgcpgw_client_release_endpoint(uint16_t id, struct mgcpgw_client *client);
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int mgcp_response_parse_params(struct mgcp_response *r);
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int mgcpgw_client_tx(struct mgcpgw_client *mgcp, struct msgb *msg,
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mgcp_response_cb_t response_cb, void *priv);
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struct msgb *mgcp_msg_crcx(struct mgcpgw_client *mgcp,
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uint16_t rtp_endpoint, unsigned int call_id,
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enum mgcp_connection_mode mode);
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struct msgb *mgcp_msg_mdcx(struct mgcpgw_client *mgcp,
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uint16_t rtp_endpoint, const char *rtp_conn_addr,
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uint16_t rtp_port, enum mgcp_connection_mode mode);
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struct msgb *mgcp_msg_dlcx(struct mgcpgw_client *mgcp, uint16_t rtp_endpoint,
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unsigned int call_id);
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void mgcpgw_client_vty_init(int node, struct mgcpgw_client_conf *conf);
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int mgcpgw_client_config_write(struct vty *vty, const char *indent);
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struct mgcp_response_pending * mgcpgw_client_pending_add(
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struct mgcpgw_client *mgcp,
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mgcp_trans_id_t trans_id,
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mgcp_response_cb_t response_cb,
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void *priv);
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int mgcpgw_client_rx(struct mgcpgw_client *mgcp, struct msgb *msg);
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