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/*
* Asterisk -- A telephony toolkit for Linux.
*
* Implementation of Inter-Asterisk eXchange
*
* Copyright (C) 2003, Digium
*
* Mark Spencer <markster@digium.com>
*
* This program is free software, distributed under the terms of
* the GNU General Public License
*/
/*!\file
* \brief Implementation of the IAX2 protocol
*/
#ifndef _IAX2_PARSER_H
#define _IAX2_PARSER_H
#include "asterisk/linkedlists.h"
#include "asterisk/crypto.h"
#include "asterisk/frame_defs.h"
struct iax_ies {
char *called_number;
char *calling_number;
char *calling_ani;
char *calling_name;
int calling_ton;
int calling_tns;
int calling_pres;
char *called_context;
char *username;
char *password;
format_t capability;
format_t format;
char *codec_prefs;
char *language;
int version;
unsigned short adsicpe;
char *dnid;
char *rdnis;
unsigned int authmethods;
unsigned int encmethods;
char *challenge;
char *md5_result;
char *rsa_result;
struct sockaddr_in *apparent_addr;
unsigned short refresh;
unsigned short dpstatus;
unsigned short callno;
char *cause;
unsigned char causecode;
unsigned char iax_unknown;
int msgcount;
int autoanswer;
int musiconhold;
unsigned int transferid;
unsigned int datetime;
char *devicetype;
char *serviceident;
int firmwarever;
unsigned int fwdesc;
unsigned char *fwdata;
unsigned char fwdatalen;
unsigned char *enckey;
unsigned char enckeylen;
unsigned int provver;
unsigned short samprate;
int provverpres;
unsigned int rr_jitter;
unsigned int rr_loss;
unsigned int rr_pkts;
unsigned short rr_delay;
unsigned int rr_dropped;
unsigned int rr_ooo;
struct ast_variable *vars;
char *osptokenblock[IAX_MAX_OSPBLOCK_NUM];
unsigned int ospblocklength[IAX_MAX_OSPBLOCK_NUM];
unsigned char calltoken;
unsigned char *calltokendata;
};
#define DIRECTION_INGRESS 1
#define DIRECTION_OUTGRESS 2
struct iax_frame {
#ifdef LIBIAX
struct iax_session *session;
struct iax_event *event;
#else
int sockfd;
#endif
/*! /Our/ call number */
unsigned short callno;
/*! /Their/ call number */
unsigned short dcallno;
/*! Start of raw frame (outgoing only) */
void *data;
/*! Length of frame (outgoing only) */
int datalen;
/*! How many retries so far? */
int retries;
/*! Outgoing relative timestamp (ms) */
unsigned int ts;
/*! How long to wait before retrying */
int retrytime;
/*! Are we received out of order? */
unsigned int outoforder:1;
/*! Have we been sent at all yet? */
unsigned int sentyet:1;
/*! Non-zero if should be sent to transfer peer */
unsigned int transfer:1;
/*! Non-zero if this is the final message */
unsigned int final:1;
/*! Ingress or outgres */
unsigned int direction:2;
/*! Can this frame be cached? */
unsigned int cacheable:1;
/*! Outgoing Packet sequence number */
int oseqno;
/*! Next expected incoming packet sequence number */
int iseqno;
/*! Retransmission ID */
int retrans;
/*! is this packet encrypted or not. if set this varible holds encryption methods*/
int encmethods;
/*! store encrypt key */
ast_aes_encrypt_key ecx;
/*! store decrypt key which corresponds to ecx */
ast_aes_decrypt_key mydcx;
/*! random data for encryption pad */
unsigned char semirand[32];
/*! Easy linking */
AST_LIST_ENTRY(iax_frame) list;
/*! Actual, isolated frame header */
struct ast_frame af;
/*! Amount of space _allocated_ for data */
size_t afdatalen;
unsigned char unused[AST_FRIENDLY_OFFSET];
unsigned char afdata[0]; /* Data for frame */
};
struct iax_ie_data {
unsigned char buf[1024];
int pos;
};
/* Choose a different function for output */
void iax_set_output(void (*output)(const char *data));
/* Choose a different function for errors */
void iax_set_error(void (*output)(const char *data));
void iax_showframe(struct iax_frame *f, struct ast_iax2_full_hdr *fhi, int rx, struct sockaddr_in *sin, int datalen);
void iax_frame_subclass2str(enum iax_frame_subclass subclass, char *str, size_t len);
const char *iax_ie2str(int ie);
int iax_ie_append_raw(struct iax_ie_data *ied, unsigned char ie, const void *data, int datalen);
int iax_ie_append_addr(struct iax_ie_data *ied, unsigned char ie, const struct sockaddr_in *sin);
int iax_ie_append_versioned_uint64(struct iax_ie_data *ied, unsigned char ie, unsigned char version, uint64_t value);
int iax_ie_append_int(struct iax_ie_data *ied, unsigned char ie, unsigned int value);
int iax_ie_append_short(struct iax_ie_data *ied, unsigned char ie, unsigned short value);
int iax_ie_append_str(struct iax_ie_data *ied, unsigned char ie, const char *str);
int iax_ie_append_byte(struct iax_ie_data *ied, unsigned char ie, unsigned char dat);
int iax_ie_append(struct iax_ie_data *ied, unsigned char ie);
int iax_parse_ies(struct iax_ies *ies, unsigned char *data, int datalen);
int iax_get_frames(void);
int iax_get_iframes(void);
int iax_get_oframes(void);
void iax_frame_wrap(struct iax_frame *fr, struct ast_frame *f);
struct iax_frame *iax_frame_new(int direction, int datalen, unsigned int cacheable);
void iax_frame_free(struct iax_frame *fr);
#endif
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