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yate/contrib/iax/iax-client.h

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/*
* Asterisk -- A telephony toolkit for Linux.
*
* Implementation of Inter-Asterisk eXchange
*
* Copyright (C) 1999, Mark Spencer
*
* Mark Spencer <markster@linux-support.net>
*
* Paul Chitescu <paulc-devel@null.ro>
*
* Diana Cionoiu <diana@voip.null.ro>
*
* This program is free software, distributed under the terms of
* the GNU Lesser General Public License (LGPL)
*/
#ifndef _ASTERISK_IAX_CLIENT_H
#define _ASTERISK_IAX_CLIENT_H
#ifndef LINUX
#define socklen_t int
#endif
#include "frame.h"
#include "iax2.h"
#include "iax2-parser.h"
#define MAXSTRLEN 80
#define IAX_AUTHMETHOD_PLAINTEXT IAX_AUTH_PLAINTEXT
#define IAX_AUTHMETHOD_MD5 IAX_AUTH_MD5
/* Define Voice Smoothing to try to make some judgements and adjust timestamps
on incoming packets to what they "ought to be" */
#define VOICE_SMOOTHING
#undef VOICE_SMOOTHING
extern char iax_errstr[];
#define IAX_EVENT_CONNECT 0 /* Connect a new call */
#define IAX_EVENT_ACCEPT 1 /* Accept a call */
#define IAX_EVENT_HANGUP 2 /* Hang up a call */
#define IAX_EVENT_REJECT 3 /* Rejected call */
#define IAX_EVENT_VOICE 4 /* Voice Data */
#define IAX_EVENT_DTMF 5 /* A DTMF Tone */
#define IAX_EVENT_TIMEOUT 6 /* Connection timeout... session will be
a pointer to free()'d memory! */
#define IAX_EVENT_LAGRQ 7 /* Lag request -- Internal use only */
#define IAX_EVENT_LAGRP 8 /* Lag Measurement. See event.lag */
#define IAX_EVENT_RINGA 9 /* Announce we/they are ringing */
#define IAX_EVENT_PING 10 /* Ping -- internal use only */
#define IAX_EVENT_PONG 11 /* Pong -- internal use only */
#define IAX_EVENT_BUSY 12 /* Report a line busy */
#define IAX_EVENT_ANSWER 13 /* Answer the line */
#define IAX_EVENT_IMAGE 14 /* Send/Receive an image */
#define IAX_EVENT_AUTHRQ 15 /* Authentication request */
#define IAX_EVENT_AUTHRP 16 /* Authentication reply */
#define IAX_EVENT_REGREQ 17 /* Registration request */
#define IAX_EVENT_REGACK 18 /* Registration reply */
#define IAX_EVENT_URL 19 /* URL received */
#define IAX_EVENT_LDCOMPLETE 20 /* URL loading complete */
#define IAX_EVENT_TRANSFER 21 /* Transfer has taken place */
#define IAX_EVENT_DPREQ 22 /* Dialplan request */
#define IAX_EVENT_DPREP 23 /* Dialplan reply */
#define IAX_EVENT_DIAL 24 /* Dial on a TBD call */
#define IAX_EVENT_QUELCH 25 /* Quelch Audio */
#define IAX_EVENT_UNQUELCH 26 /* Unquelch Audio */
#define IAX_EVENT_UNLINK 27 /* Unlink */
#define IAX_EVENT_LINKREJECT 28 /* Link Rejection */
#define IAX_EVENT_TEXT 29 /* Text Frame :-) */
#define IAX_EVENT_REGREJ 30 /* Registration reply */
#define IAX_EVENT_LINKURL 31 /* Unlink */
#define IAX_SCHEDULE_FUZZ 0 /* ms of fuzz to drop */
#ifdef WIN32
#if defined(_MSC_VER)
typedef int (__stdcall *sendto_t)(SOCKET, const char *, int, int, const struct sockaddr *, int);
#else
typedef int PASCAL (*sendto_t)(SOCKET, const char *, int, int, const struct sockaddr *, int);
#endif
#else
typedef int (*sendto_t)(int, const void *, size_t, int, const struct sockaddr *, socklen_t);
#endif
#define MEMORY_SIZE 100
struct iax_session {
/* Private data */
void *pvt;
/* Sendto function */
sendto_t sendto;
/* Is voice quelched (e.g. hold) */
int quelch;
/* Last received voice format */
int voiceformat;
/* Last transmitted voice format */
int svoiceformat;
/* Last received timestamp */
unsigned int last_ts;
/* Last transmitted timestamp */
unsigned int lastsent;
/* Last transmitted voice timestamp */
unsigned int lastvoicets;
/* Our last measured ping time */
unsigned int pingtime;
/* Address of peer */
struct sockaddr_in peeraddr;
/* Our call number */
int callno;
/* Peer's call number */
int peercallno;
/* Our next outgoing sequence number */
unsigned char oseqno;
/* Next sequence number they have not yet acknowledged */
unsigned char rseqno;
/* Our last received incoming sequence number */
unsigned char iseqno;
/* Last acknowledged sequence number */
unsigned char aseqno;
/* Peer supported formats */
int peerformats;
/* Time value that we base our transmission on */
struct timeval offset;
/* Time value we base our delivery on */
struct timeval rxcore;
/* History of lags */
int history[MEMORY_SIZE];
/* Current base jitterbuffer */
int jitterbuffer;
/* Informational jitter */
int jitter;
/* Measured lag */
int lag;
/* Current link state */
int state;
/* Peer name */
char peer[MAXSTRLEN];
/* Default Context */
char context[MAXSTRLEN];
/* Caller ID if available */
char callerid[MAXSTRLEN];
/* DNID */
char dnid[MAXSTRLEN];
/* Requested Extension */
char exten[MAXSTRLEN];
/* Expected Username */
char username[MAXSTRLEN];
/* Expected Secret */
char secret[MAXSTRLEN];
/* permitted authentication methods */
char methods[MAXSTRLEN];
/* MD5 challenge */
char challenge[12];
#ifdef VOICE_SMOOTHING
unsigned int lastts;
#endif
/* Refresh if applicable */
int refresh;
/* Transfer stuff */
struct sockaddr_in transfer;
int transferring;
int transfercallno;
int transferid;
/* For linking if there are multiple connections */
struct iax_session *next;
};
struct iax_event {
int etype; /* Type of event */
int subclass; /* Subclass data (event specific) */
unsigned int ts; /* Timestamp */
struct iax_session *session; /* Applicable session */
int datalen; /* Length of raw data */
struct iax_ies ies; /* IE's for IAX2 frames */
unsigned char data[0]; /* Raw data if applicable */
};
#if defined(__cplusplus)
extern "C"
{
#endif
/* All functions return 0 on success and -1 on failure unless otherwise
specified */
/* Called to initialize IAX structures and sockets. Returns actual
portnumber (which it will try preferred portno first, but if not
take what it can get */
extern int iax_init(int preferredportno);
/* Get filedescriptor for IAX to use with select or gtk_input_add */
extern int iax_get_fd(void);
/* Find out how many milliseconds until the next scheduled event */
extern int iax_time_to_next_event(void);
/* Generate a new IAX session */
extern struct iax_session *iax_session_new(void);
/* Return exactly one iax event (if there is one pending). If blocking is
non-zero, IAX will block until some event is received */
extern struct iax_event *iax_get_event(int blocking);
extern int iax_auth_reply(struct iax_session *session, char *password,
char *challenge, int methods);
/* Stop iax, hangup file descriptors, free memory, etc. */
extern void iax_end(void);
/* Free an event */
extern void iax_event_free(struct iax_event *event);
struct sockaddr_in;
/* Front ends for sending events */
extern void iax_set_formats(int fmt);
extern int iax_send_dtmf(struct iax_session *session, char digit);
extern int iax_send_voice(struct iax_session *session, int format, char *data, int datalen);
extern int iax_send_image(struct iax_session *session, int format, char *data, int datalen);
extern int iax_send_url(struct iax_session *session, char *url, int link);
extern int iax_send_text(struct iax_session *session, char *text);
extern int iax_load_complete(struct iax_session *session);
extern int iax_reject(struct iax_session *session, char *reason);
extern int iax_busy(struct iax_session *session);
extern int iax_hangup(struct iax_session *session, char *byemsg);
extern int iax_call(struct iax_session *session, char *cidnum, char *cidname, char *ich, char *lang, int wait);
extern int iax_accept(struct iax_session *session,int format);
extern int iax_answer(struct iax_session *session);
extern int iax_sendurl(struct iax_session *session, char *url);
extern int iax_send_unlink(struct iax_session *session);
extern int iax_send_link_reject(struct iax_session *session);
extern int iax_ring_announce(struct iax_session *session);
extern struct sockaddr_in iax_get_peer_addr(struct iax_session *session);
extern int iax_register(struct iax_session *session, char *hostname, char *peer, char *secret, int refresh);
extern int iax_lag_request(struct iax_session *session);
extern int iax_dial(struct iax_session *session, char *number); /* Dial on a TBD call */
extern int iax_dialplan_request(struct iax_session *session, char *number); /* Request dialplan status for number */
extern int iax_quelch(struct iax_session *session);
extern int iax_unquelch(struct iax_session * session);
extern int iax_transfer(struct iax_session *session, char *number);
extern void iax_destroy(struct iax_session * session);
extern void iax_enable_debug(void);
extern void iax_disable_debug(void);
extern void iax_set_private(struct iax_session *s, void *pvt);
extern void *iax_get_private(struct iax_session *s);
extern void iax_set_sendto(struct iax_session *s, sendto_t sendto);
/* Handle externally received frames */
struct iax_event *iax_net_process(unsigned char *buf, int len, struct sockaddr_in *sin);
/* these functione allows you to use libiax for a server */
int iax_send_regauth(struct iax_session *session, int authmethod);
int iax_send_authreq(struct iax_session *session, int authmethod);
int iax_send_regack(struct iax_session *session);
int iax_send_regrej(struct iax_session *session);
/* we need this low level function */
int iax_send(struct iax_session *pvt, struct ast_frame *f, unsigned int ts, int seqno, int now, int transfer, int final);
#if defined(__cplusplus)
}
#endif
#endif /* _ASTERISK_IAX_CLIENT_H */
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