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/*
* Asterisk -- A telephony toolkit for Linux.
*
* Implementation of Inter-Asterisk eXchange
*
* Copyright (C) 2003, Digium
*
* Mark Spencer <markster@linux-support.net>
*
* This program is free software, distributed under the terms of
* the GNU General Public License
*/
#ifndef _ASTERISK_IAX2_H
#define _ASTERISK_IAX2_H
/* Max version of IAX protocol we support */
#define AST_IAX2_PROTO_VERSION 2
#define AST_IAX2_MAX_CALLS 32768
#define AST_FLAG_FULL 0x8000
#define AST_FLAG_RETRANS 0x8000
#define AST_FLAG_SC_LOG 0x80
#define AST_MAX_SHIFT 0x1F
#define AST_IAX2_WINDOW 256
/* Subclass for AST_FRAME_IAX */
#define AST_IAX2_COMMAND_NEW 1
#define AST_IAX2_COMMAND_PING 2
#define AST_IAX2_COMMAND_PONG 3
#define AST_IAX2_COMMAND_ACK 4
#define AST_IAX2_COMMAND_HANGUP 5
#define AST_IAX2_COMMAND_REJECT 6
#define AST_IAX2_COMMAND_ACCEPT 7
#define AST_IAX2_COMMAND_AUTHREQ 8
#define AST_IAX2_COMMAND_AUTHREP 9
#define AST_IAX2_COMMAND_INVAL 10
#define AST_IAX2_COMMAND_LAGRQ 11
#define AST_IAX2_COMMAND_LAGRP 12
#define AST_IAX2_COMMAND_REGREQ 13 /* Registration request */
#define AST_IAX2_COMMAND_REGAUTH 14 /* Registration authentication required */
#define AST_IAX2_COMMAND_REGACK 15 /* Registration accepted */
#define AST_IAX2_COMMAND_REGREJ 16 /* Registration rejected */
#define AST_IAX2_COMMAND_REGREL 17 /* Force release of registration */
#define AST_IAX2_COMMAND_VNAK 18 /* If we receive voice before valid first voice frame, send this */
#define AST_IAX2_COMMAND_DPREQ 19 /* Request status of a dialplan entry */
#define AST_IAX2_COMMAND_DPREP 20 /* Request status of a dialplan entry */
#define AST_IAX2_COMMAND_DIAL 21 /* Request a dial on channel brought up TBD */
#define AST_IAX2_COMMAND_TXREQ 22 /* Transfer Request */
#define AST_IAX2_COMMAND_TXCNT 23 /* Transfer Connect */
#define AST_IAX2_COMMAND_TXACC 24 /* Transfer Accepted */
#define AST_IAX2_COMMAND_TXREADY 25 /* Transfer ready */
#define AST_IAX2_COMMAND_TXREL 26 /* Transfer release */
#define AST_IAX2_COMMAND_TXREJ 27 /* Transfer reject */
#define AST_IAX2_COMMAND_QUELCH 28 /* Stop audio/video transmission */
#define AST_IAX2_COMMAND_UNQUELCH 29 /* Resume audio/video transmission */
#define AST_IAX2_COMMAND_POKE 30 /* Like ping, but does not require an open connection */
#define AST_IAX2_COMMAND_PAGE 31 /* Paging description */
#define AST_IAX2_COMMAND_MWI 32 /* Stand-alone message waiting indicator */
#define AST_IAX2_COMMAND_UNSUPPORT 33 /* Unsupported message received */
#define AST_DEFAULT_REG_EXPIRE 60 /* By default require re-registration once per minute */
#define AST_DEFAULT_IAX_PORTNO 4569
/* IAX Information elements */
#define IAX_IE_CALLED_NUMBER 1 /* Number/extension being called - string */
#define IAX_IE_CALLING_NUMBER 2 /* Calling number - string */
#define IAX_IE_CALLING_ANI 3 /* Calling number ANI for billing - string */
#define IAX_IE_CALLING_NAME 4 /* Name of caller - string */
#define IAX_IE_CALLED_CONTEXT 5 /* Context for number - string */
#define IAX_IE_USERNAME 6 /* Username (peer or user) for authentication - string */
#define IAX_IE_PASSWORD 7 /* Password for authentication - string */
#define IAX_IE_CAPABILITY 8 /* Actual codec capability - unsigned int */
#define IAX_IE_FORMAT 9 /* Desired codec format - unsigned int */
#define IAX_IE_LANGUAGE 10 /* Desired language - string */
#define IAX_IE_VERSION 11 /* Protocol version - short */
#define IAX_IE_ADSICPE 12 /* CPE ADSI capability - int */
#define IAX_IE_DNID 13 /* Originally dialed DNID - string */
#define IAX_IE_AUTHMETHODS 14 /* Authentication method(s) - short */
#define IAX_IE_CHALLENGE 15 /* Challenge data for MD5/RSA - string */
#define IAX_IE_MD5_RESULT 16 /* MD5 challenge result - string */
#define IAX_IE_RSA_RESULT 17 /* RSA challenge result - string */
#define IAX_IE_APPARENT_ADDR 18 /* Apparent address of peer - struct sockaddr_in */
#define IAX_IE_REFRESH 19 /* When to refresh registration - short */
#define IAX_IE_DPSTATUS 20 /* Dialplan status - short */
#define IAX_IE_CALLNO 21 /* Call number of peer - short */
#define IAX_IE_CAUSE 22 /* Cause - string */
#define IAX_AUTH_PLAINTEXT (1 << 0)
#define IAX_AUTH_MD5 (1 << 1)
#define IAX_AUTH_RSA (1 << 2)
#define IAX_META_TRUNK 1 /* Trunk meta-message */
#define IAX_META_VIDEO 2 /* Video frame */
#define IAX_DPSTATUS_EXISTS (1 << 0)
#define IAX_DPSTATUS_CANEXIST (1 << 1)
#define IAX_DPSTATUS_NONEXISTANT (1 << 2)
#define IAX_DPSTATUS_IGNOREPAT (1 << 14)
#define IAX_DPSTATUS_MATCHMORE (1 << 15)
/* Full frames are always delivered reliably */
struct ast_iax2_full_hdr {
unsigned short scallno; /* Source call number -- high bit must be 1 */
unsigned short dcallno; /* Destination call number -- high bit is 1 if retransmission */
unsigned int ts; /* 32-bit timestamp in milliseconds (from 1st transmission) */
unsigned char oseqno; /* Packet number (outgoing) */
unsigned char iseqno; /* Packet number (next incoming expected) */
char type; /* Frame type */
unsigned char csub; /* Compressed subclass */
unsigned char iedata[0];
} __attribute__ ((__packed__));
/* Mini header is used only for voice frames -- delivered unreliably */
struct ast_iax2_mini_hdr {
unsigned short callno; /* Source call number -- high bit must be 0, rest must be non-zero */
unsigned short ts; /* 16-bit Timestamp (high 16 bits from last ast_iax2_full_hdr) */
/* Frametype implicitly VOICE_FRAME */
/* subclass implicit from last ast_iax2_full_hdr */
unsigned char iedata[0];
} __attribute__ ((__packed__));
struct ast_iax2_meta_hdr {
unsigned short zeros; /* Zeros field -- must be zero */
unsigned char metacmd; /* Meta command */
unsigned char cmddata; /* Command Data */
unsigned char data[0];
} __attribute__ ((__packed__));
struct ast_iax2_meta_trunk_hdr {
unsigned int ts; /* 32-bit timestamp for all messages */
unsigned char data[0];
};
struct ast_iax2_meta_trunk_entry {
unsigned short callno; /* Call number */
unsigned short len; /* Length of data for this callno */
};
#endif
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