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/* Everything related to the BSC connection */
/*
* (C) 2010 by Holger Hans Peter Freyther <zecke@selfish.org>
* (C) 2010 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 General Public License as published by
* the Free Software Foundation; either version 2 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
*/
#ifndef BSC_DATA_H
#define BSC_DATA_H
#include <osmocore/linuxlist.h>
#include <osmocore/select.h>
#include <osmocore/timer.h>
#include <osmocore/write_queue.h>
#include <osmocore/protocol/gsm_04_08.h>
#include <osmocom/sccp/sccp.h>
#include <netinet/in.h>
#include <arpa/inet.h>
struct bsc_data;
struct snmp_mtp_session;
/**
* A link to the underlying MTP2 library or such
*/
struct link_data {
struct llist_head entry;
union {
struct {
struct thread_notifier *notifier;
struct llist_head mtp_queue;
struct timer_list mtp_timeout;
} c7;
struct {
struct snmp_mtp_session *session;
struct sockaddr_in remote;
int reset_timeout;
int udp_port;
char *udp_ip;
} udp;
};
int link_index;
int pcap_fd;
struct bsc_data *bsc;
struct mtp_link *the_link;
struct timer_list link_activate;
int forced_down;
int (*start)(struct link_data *);
int (*write)(struct link_data *, struct msgb *msg);
int (*shutdown)(struct link_data *);
int (*reset)(struct link_data *data);
int (*clear_queue)(struct link_data *data);
};
struct bsc_data {
/* MSC */
char *msc_address;
struct write_queue msc_connection;
struct timer_list reconnect_timer;
int first_contact;
int msc_time;
struct timer_list msc_timeout;
int msc_ip_dscp;
int ping_time;
int pong_time;
struct timer_list ping_timeout;
struct timer_list pong_timeout;
int msc_link_down;
struct llist_head sccp_connections;
struct timer_list reset_timeout;
int reset_count;
struct timer_list start_timer;
int setup;
int pcap_fd;
int udp_reset_timeout;
struct llist_head links;
const char *token;
/* mgcp messgaes */
struct write_queue mgcp_agent;
int dpc;
int opc;
int sccp_opc;
int src_port;
int once;
/* the network header to use */
int ni_ni;
int ni_spare;
/* LAC of the cell */
struct gsm48_loc_area_id lai;
uint16_t mcc;
uint16_t mnc;
uint16_t lac;
int forward_only;
/* UDP socket code */
struct write_queue udp_write_queue;
};
/* bsc related functions */
void release_bsc_resources(struct bsc_data *bsc);
void bsc_link_down(struct link_data *data);
void bsc_link_up(struct link_data *data);
/* linkset related */
void bsc_linkset_down(struct bsc_data *bsc);
void bsc_linkset_up(struct bsc_data *bsc);
/* msc related functions */
int msc_init(struct bsc_data *bsc, int mgcp);
void msc_send_rlc(struct bsc_data *bsc, struct sccp_source_reference *src, struct sccp_source_reference *dest);
void msc_send_reset(struct bsc_data *bsc);
void msc_send_msg(struct bsc_data *bsc, int rc, struct sccp_parse_result *, struct msgb *msg);
void msc_send_direct(struct bsc_data *bsc, struct msgb *msg);
void msc_close_connection(struct bsc_data *data);
/* connection tracking and action */
void update_con_state(struct bsc_data *bsc, int rc, struct sccp_parse_result *result, struct msgb *msg, int from_msc, int sls);
unsigned int sls_for_src_ref(struct sccp_source_reference *ref);
/* c7 init */
int link_c7_init(struct link_data *data);
/* udp init */
int link_udp_network_init(struct bsc_data *bsc);
int link_udp_init(struct link_data *link, const char *ip, int port);
/* MGCP */
void mgcp_forward(struct bsc_data *bsc, const uint8_t *data, unsigned int length);
/* link help */
void link_stop_all(struct bsc_data *bsc);
void link_reset_all(struct bsc_data *bsc);
void link_start_all(struct bsc_data *bsc);
void link_shutdown_all(struct bsc_data *bsc);
void link_set_pcap_fd(struct bsc_data *bsc);
void link_set_reset_timeout(struct bsc_data *bsc);
int link_setup_start(struct bsc_data *bsc);
/* sending messages */
int linkset_send_bsc_msg(struct bsc_data *link, int sls, struct msgb *msg);
int linkset_send_bsc_data(struct bsc_data *link, int sls, const uint8_t *data, int length);
/* another callback for SCCP data from the linkset */
void linkset_forward_sccp(struct bsc_data *bsc, struct msgb *msg, int sls);
/* find the link */
struct link_data *linkset_find_link(struct bsc_data *bsc, int link_index);
#endif
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