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/*
* libss7: An implementation of Signalling System 7
*
* Written by Matthew Fredrickson <creslin@digium.com>
*
* scheduling routines taken from libpri by Mark Spencer <markster@digium.com>
*
* Copyright (C) 2006-2008, Digium, Inc
* All Rights Reserved.
*/
/*
* See http://www.asterisk.org for more information about
* the Asterisk project. Please do not directly contact
* any of the maintainers of this project for assistance;
* the project provides a web site, mailing lists and IRC
* channels for your use.
*
* This program is free software, distributed under the terms of
* the GNU General Public License Version 2 as published by the
* Free Software Foundation. See the LICENSE file included with
* this program for more details.
*
* In addition, when this program is distributed with Asterisk in
* any form that would qualify as a 'combined work' or as a
* 'derivative work' (but not mere aggregation), you can redistribute
* and/or modify the combination under the terms of the license
* provided with that copy of Asterisk, instead of the license
* terms granted here.
*/
#ifndef _SS7_H
#define _SS7_H
#include <sys/time.h>
#include <stdio.h>
#include "libss7.h"
/* #include "mtp2.h" */
/* #include "mtp3.h" */
/* ISUP parameters */
/* ISUP Timers */
#define ISUP_MAX_TIMERS 64
/* Information Transfer Capability */
#define ISUP_TRANSCAP_SPEECH 0x00
#define ISUP_TRANSCAP_UNRESTRICTED_DIGITAL 0x08
#define ISUP_TRANSCAP_RESTRICTED_DIGITAL 0x09
#define ISUP_TRANSCAP_31KHZ_AUDIO 0x10
#define ISUP_TRANSCAP_7KHZ_AUDIO 0x11
/* User Information layer 1 protocol types */
#define ISUP_L1PROT_G711ULAW 0x02
#define MAX_EVENTS 16
#define MAX_SCHED 512 /* need a lot cause of isup timers... */
#define SS7_MAX_LINKS 8
#define SS7_MAX_ADJSPS 8
#define SS7_STATE_DOWN 0
#define SS7_STATE_UP 1
/* delay to starting sending GRS when linkset came up */
#define LINKSET_UP_DELAY 500
/* MTP3 timers */
#define MTP3_MAX_TIMERS 32
#define LOC_PRIV_NET_LOCAL_USER 0x1
typedef unsigned int point_code;
struct routing_label {
unsigned int type;
point_code dpc;
point_code opc;
unsigned char sls;
};
struct ss7_msg {
unsigned char buf[512];
unsigned int size;
struct ss7_msg *next;
};
struct ss7_sched {
struct timeval when;
void (*callback)(void *data);
void *data;
};
struct ss7 {
unsigned int switchtype;
unsigned int numsps;
unsigned int numlinks;
/* Our point code */
point_code pc;
unsigned char ni;
unsigned char sls;
int state;
unsigned int debug;
/* event queue */
int ev_h;
int ev_t;
int ev_len;
ss7_event ev_q[MAX_EVENTS];
struct ss7_sched ss7_sched[MAX_SCHED];
struct isup_call *calls;
unsigned int mtp2_linkstate[SS7_MAX_LINKS];
struct mtp2 *links[SS7_MAX_LINKS];
struct adjacent_sp *adj_sps[SS7_MAX_ADJSPS];
int isup_timers[ISUP_MAX_TIMERS];
int mtp3_timers[MTP3_MAX_TIMERS];
unsigned char sls_shift;
unsigned int flags;
unsigned char cb_seq;
int linkset_up_timer;
unsigned char cause_location;
};
/* Getto hacks for developmental purposes */
struct ss7_msg * ss7_msg_new(void);
void ss7_msg_free(struct ss7_msg *m);
/* Scheduler functions */
int ss7_schedule_event(struct ss7 *ss7, int ms, void (*function)(void *data), void *data);
ss7_event * ss7_next_empty_event(struct ss7 * ss7);
void ss7_schedule_del(struct ss7 *ss7,int *id);
int ss7_find_link_index(struct ss7 *ss7, int fd);
struct mtp2 * ss7_find_link(struct ss7 *ss7, int fd);
unsigned char *ss7_msg_userpart(struct ss7_msg *m);
void ss7_msg_userpart_len(struct ss7_msg *m, int len);
void ss7_message(struct ss7 *ss7, const char *fmt, ...) __attribute__((format(printf, 2, 3)));
void ss7_error(struct ss7 *ss7, const char *fmt, ...) __attribute__((format(printf, 2, 3)));
#define ss7_debug_msg(ctrl, flags, ...) \
do { \
if ((ctrl)->debug & (flags)) { \
ss7_message(ctrl, __VA_ARGS__); \
} \
} while (0)
void ss7_dump_buf(struct ss7 *ss7, int tabs, unsigned char *buf, int len);
void ss7_dump_msg(struct ss7 *ss7, unsigned char *buf, int len);
extern void (*ss7_notinservice)(struct ss7 *ss7, int cic, unsigned int dpc);
extern int (*ss7_hangup)(struct ss7 *ss7, int cic, unsigned int dpc, int cause, int do_hangup);
extern void (*ss7_call_null)(struct ss7 *ss7, struct isup_call *c, int lock);
#endif /* _SS7_H */
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