298 lines
12 KiB
C
298 lines
12 KiB
C
/*
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* Asterisk -- A telephony toolkit for Linux.
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*
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* Implementation of Inter-Asterisk eXchange
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*
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* Copyright (C) 2003, Digium
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*
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* Mark Spencer <markster@linux-support.net>
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*
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* This program is free software, distributed under the terms of
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* the GNU General Public License
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*/
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/*! \file
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* \brief
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*
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* Implementation of Inter-Asterisk eXchange, version 2
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* \ref iax2-parser.c
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* \ref iax2-parser.h
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* \ref chan_iax2.c
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*/
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#ifndef _IAX2_H
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#define _IAX2_H
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/* Max version of IAX protocol we support */
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#define IAX_PROTO_VERSION 2
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/* NOTE: IT IS CRITICAL THAT IAX_MAX_CALLS BE A POWER OF 2. */
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#if defined(LOW_MEMORY)
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#define IAX_MAX_CALLS 2048
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#else
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#define IAX_MAX_CALLS 32768
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#endif
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#define IAX_FLAG_FULL 0x8000
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#define IAX_FLAG_RETRANS 0x8000
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#define IAX_FLAG_SC_LOG 0x80
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#define IAX_MAX_SHIFT 0x3F
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#define IAX_WINDOW 64
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/*! Subclass for AST_FRAME_IAX */
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enum iax_frame_subclass {
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IAX_COMMAND_NEW = 1,
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IAX_COMMAND_PING = 2,
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IAX_COMMAND_PONG = 3,
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IAX_COMMAND_ACK = 4,
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IAX_COMMAND_HANGUP = 5,
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IAX_COMMAND_REJECT = 6,
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IAX_COMMAND_ACCEPT = 7,
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IAX_COMMAND_AUTHREQ = 8,
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IAX_COMMAND_AUTHREP = 9,
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IAX_COMMAND_INVAL = 10,
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IAX_COMMAND_LAGRQ = 11,
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IAX_COMMAND_LAGRP = 12,
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/*! Registration request */
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IAX_COMMAND_REGREQ = 13,
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/*! Registration authentication required */
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IAX_COMMAND_REGAUTH = 14,
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/*! Registration accepted */
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IAX_COMMAND_REGACK = 15,
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/*! Registration rejected */
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IAX_COMMAND_REGREJ = 16,
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/*! Force release of registration */
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IAX_COMMAND_REGREL = 17,
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/*! If we receive voice before valid first voice frame, send this */
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IAX_COMMAND_VNAK = 18,
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/*! Request status of a dialplan entry */
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IAX_COMMAND_DPREQ = 19,
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/*! Request status of a dialplan entry */
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IAX_COMMAND_DPREP = 20,
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/*! Request a dial on channel brought up TBD */
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IAX_COMMAND_DIAL = 21,
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/*! Transfer Request */
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IAX_COMMAND_TXREQ = 22,
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/*! Transfer Connect */
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IAX_COMMAND_TXCNT = 23,
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/*! Transfer Accepted */
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IAX_COMMAND_TXACC = 24,
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/*! Transfer ready */
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IAX_COMMAND_TXREADY = 25,
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/*! Transfer release */
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IAX_COMMAND_TXREL = 26,
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/*! Transfer reject */
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IAX_COMMAND_TXREJ = 27,
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/*! Stop audio/video transmission */
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IAX_COMMAND_QUELCH = 28,
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/*! Resume audio/video transmission */
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IAX_COMMAND_UNQUELCH = 29,
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/*! Like ping, but does not require an open connection */
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IAX_COMMAND_POKE = 30,
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/*! Paging description */
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IAX_COMMAND_PAGE = 31,
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/*! Stand-alone message waiting indicator */
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IAX_COMMAND_MWI = 32,
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/*! Unsupported message received */
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IAX_COMMAND_UNSUPPORT = 33,
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/*! Request remote transfer */
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IAX_COMMAND_TRANSFER = 34,
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/*! Provision device */
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IAX_COMMAND_PROVISION = 35,
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/*! Download firmware */
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IAX_COMMAND_FWDOWNL = 36,
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/*! Firmware Data */
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IAX_COMMAND_FWDATA = 37,
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/*! Transfer media only */
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IAX_COMMAND_TXMEDIA = 38,
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/*! Command to rotate key */
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IAX_COMMAND_RTKEY = 39,
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/*! Call number token */
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IAX_COMMAND_CALLTOKEN = 40,
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};
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/*! By default require re-registration once per minute */
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#define IAX_DEFAULT_REG_EXPIRE 60
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/*! How long to wait before closing bridged call */
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#define IAX_LINGER_TIMEOUT 10
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#define IAX_DEFAULT_PORTNO 4569
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/*! IAX Information elements */
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#define IAX_IE_CALLED_NUMBER 1 /*!< Number/extension being called - string */
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#define IAX_IE_CALLING_NUMBER 2 /*!< Calling number - string */
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#define IAX_IE_CALLING_ANI 3 /*!< Calling number ANI for billing - string */
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#define IAX_IE_CALLING_NAME 4 /*!< Name of caller - string */
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#define IAX_IE_CALLED_CONTEXT 5 /*!< Context for number - string */
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#define IAX_IE_USERNAME 6 /*!< Username (peer or user) for authentication - string */
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#define IAX_IE_PASSWORD 7 /*!< Password for authentication - string */
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#define IAX_IE_CAPABILITY 8 /*!< Actual codec capability - unsigned int */
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#define IAX_IE_FORMAT 9 /*!< Desired codec format - unsigned int */
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#define IAX_IE_LANGUAGE 10 /*!< Desired language - string */
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#define IAX_IE_VERSION 11 /*!< Protocol version - short */
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#define IAX_IE_ADSICPE 12 /*!< CPE ADSI capability - short */
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#define IAX_IE_DNID 13 /*!< Originally dialed DNID - string */
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#define IAX_IE_AUTHMETHODS 14 /*!< Authentication method(s) - short */
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#define IAX_IE_CHALLENGE 15 /*!< Challenge data for MD5/RSA - string */
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#define IAX_IE_MD5_RESULT 16 /*!< MD5 challenge result - string */
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#define IAX_IE_RSA_RESULT 17 /*!< RSA challenge result - string */
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#define IAX_IE_APPARENT_ADDR 18 /*!< Apparent address of peer - struct sockaddr_in */
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#define IAX_IE_REFRESH 19 /*!< When to refresh registration - short */
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#define IAX_IE_DPSTATUS 20 /*!< Dialplan status - short */
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#define IAX_IE_CALLNO 21 /*!< Call number of peer - short */
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#define IAX_IE_CAUSE 22 /*!< Cause - string */
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#define IAX_IE_IAX_UNKNOWN 23 /*!< Unknown IAX command - byte */
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#define IAX_IE_MSGCOUNT 24 /*!< How many messages waiting - short */
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#define IAX_IE_AUTOANSWER 25 /*!< Request auto-answering -- none */
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#define IAX_IE_MUSICONHOLD 26 /*!< Request musiconhold with QUELCH -- none or string */
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#define IAX_IE_TRANSFERID 27 /*!< Transfer Request Identifier -- int */
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#define IAX_IE_RDNIS 28 /*!< Referring DNIS -- string */
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#define IAX_IE_PROVISIONING 29 /*!< Provisioning info */
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#define IAX_IE_AESPROVISIONING 30 /*!< AES Provisioning info */
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#define IAX_IE_DATETIME 31 /*!< Date/Time */
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#define IAX_IE_DEVICETYPE 32 /*!< Device Type -- string */
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#define IAX_IE_SERVICEIDENT 33 /*!< Service Identifier -- string */
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#define IAX_IE_FIRMWAREVER 34 /*!< Firmware revision -- u16 */
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#define IAX_IE_FWBLOCKDESC 35 /*!< Firmware block description -- u32 */
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#define IAX_IE_FWBLOCKDATA 36 /*!< Firmware block of data -- raw */
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#define IAX_IE_PROVVER 37 /*!< Provisioning Version (u32) */
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#define IAX_IE_CALLINGPRES 38 /*!< Calling presentation (u8) */
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#define IAX_IE_CALLINGTON 39 /*!< Calling type of number (u8) */
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#define IAX_IE_CALLINGTNS 40 /*!< Calling transit network select (u16) */
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#define IAX_IE_SAMPLINGRATE 41 /*!< Supported sampling rates (u16) */
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#define IAX_IE_CAUSECODE 42 /*!< Hangup cause (u8) */
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#define IAX_IE_ENCRYPTION 43 /*!< Encryption format (u16) */
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#define IAX_IE_ENCKEY 44 /*!< Encryption key (raw) */
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#define IAX_IE_CODEC_PREFS 45 /*!< Codec Negotiation */
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#define IAX_IE_RR_JITTER 46 /*!< Received jitter (as in RFC1889) u32 */
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#define IAX_IE_RR_LOSS 47 /*!< Received loss (high byte loss pct, low 24 bits loss count, as in rfc1889 */
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#define IAX_IE_RR_PKTS 48 /*!< Received frames (total frames received) u32 */
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#define IAX_IE_RR_DELAY 49 /*!< Max playout delay for received frames (in ms) u16 */
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#define IAX_IE_RR_DROPPED 50 /*!< Dropped frames (presumably by jitterbuf) u32 */
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#define IAX_IE_RR_OOO 51 /*!< Frames received Out of Order u32 */
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#define IAX_IE_VARIABLE 52 /*!< Remote variables */
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#define IAX_IE_OSPTOKEN 53 /*!< OSP token */
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#define IAX_IE_CALLTOKEN 54 /*!< Call number security token */
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#define IAX_IE_CAPABILITY2 55 /*!< Actual codec capability - u8 version + integer array */
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#define IAX_IE_FORMAT2 56 /*!< Desired codec format - u8 version + integer array */
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#define IAX_MAX_OSPBLOCK_SIZE 254 /*!< Max OSP token block size, 255 bytes - 1 byte OSP token block index */
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#define IAX_MAX_OSPBLOCK_NUM 4
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#define IAX_MAX_OSPTOKEN_SIZE (IAX_MAX_OSPBLOCK_SIZE * IAX_MAX_OSPBLOCK_NUM)
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#define IAX_MAX_OSPBUFF_SIZE (IAX_MAX_OSPTOKEN_SIZE + 16)
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#define IAX_AUTH_PLAINTEXT (1 << 0)
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#define IAX_AUTH_MD5 (1 << 1)
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#define IAX_AUTH_RSA (1 << 2)
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#define IAX_ENCRYPT_AES128 (1 << 0)
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#define IAX_ENCRYPT_KEYROTATE (1 << 15) /*!< Keyrotation support */
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#define IAX_META_TRUNK 1 /*!< Trunk meta-message */
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#define IAX_META_VIDEO 2 /*!< Video frame */
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#define IAX_META_TRUNK_SUPERMINI 0 /*!< This trunk frame contains classic supermini frames */
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#define IAX_META_TRUNK_MINI 1 /*!< This trunk frame contains trunked mini frames */
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#define IAX_RATE_8KHZ (1 << 0) /*!< 8khz sampling (default if absent) */
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#define IAX_RATE_11KHZ (1 << 1) /*!< 11.025khz sampling */
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#define IAX_RATE_16KHZ (1 << 2) /*!< 16khz sampling */
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#define IAX_RATE_22KHZ (1 << 3) /*!< 22.05khz sampling */
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#define IAX_RATE_44KHZ (1 << 4) /*!< 44.1khz sampling */
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#define IAX_RATE_48KHZ (1 << 5) /*!< 48khz sampling */
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#define IAX_DPSTATUS_EXISTS (1 << 0)
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#define IAX_DPSTATUS_CANEXIST (1 << 1)
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#define IAX_DPSTATUS_NONEXISTENT (1 << 2)
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#define IAX_DPSTATUS_IGNOREPAT (1 << 14)
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#define IAX_DPSTATUS_MATCHMORE (1 << 15)
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/*! iax2 format bit field for handling codecs the old way */
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typedef int64_t iax2_format;
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/*!\brief iax2 wrapper function for ast_getformatname */
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const char *iax2_getformatname(iax2_format format);
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/*! Full frames are always delivered reliably */
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struct ast_iax2_full_hdr {
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unsigned short scallno; /*!< Source call number -- high bit must be 1 */
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unsigned short dcallno; /*!< Destination call number -- high bit is 1 if retransmission */
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unsigned int ts; /*!< 32-bit timestamp in milliseconds (from 1st transmission) */
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unsigned char oseqno; /*!< Packet number (outgoing) */
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unsigned char iseqno; /*!< Packet number (next incoming expected) */
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unsigned char type; /*!< Frame type */
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unsigned char csub; /*!< Compressed subclass */
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unsigned char iedata[0];
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} __attribute__ ((__packed__));
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/*! Full frames are always delivered reliably */
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struct ast_iax2_full_enc_hdr {
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unsigned short scallno; /*!< Source call number -- high bit must be 1 */
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unsigned short dcallno; /*!< Destination call number -- high bit is 1 if retransmission */
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unsigned char encdata[0];
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} __attribute__ ((__packed__));
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/*! Mini header is used only for voice frames -- delivered unreliably */
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struct ast_iax2_mini_hdr {
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unsigned short callno; /*!< Source call number -- high bit must be 0, rest must be non-zero */
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unsigned short ts; /*!< 16-bit Timestamp (high 16 bits from last ast_iax2_full_hdr) */
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/* Frametype implicitly VOICE_FRAME */
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/* subclass implicit from last ast_iax2_full_hdr */
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unsigned char data[0];
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} __attribute__ ((__packed__));
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/*! Mini header is used only for voice frames -- delivered unreliably */
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struct ast_iax2_mini_enc_hdr {
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unsigned short callno; /*!< Source call number -- high bit must be 0, rest must be non-zero */
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unsigned char encdata[0];
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} __attribute__ ((__packed__));
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struct ast_iax2_meta_hdr {
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unsigned short zeros; /*!< Zeros field -- must be zero */
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unsigned char metacmd; /*!< Meta command */
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unsigned char cmddata; /*!< Command Data */
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unsigned char data[0];
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} __attribute__ ((__packed__));
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struct ast_iax2_video_hdr {
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unsigned short zeros; /*!< Zeros field -- must be zero */
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unsigned short callno; /*!< Video call number */
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unsigned short ts; /*!< Timestamp and mark if present */
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unsigned char data[0];
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} __attribute__ ((__packed__));
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struct ast_iax2_meta_trunk_hdr {
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unsigned int ts; /*!< 32-bit timestamp for all messages */
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unsigned char data[0];
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} __attribute__ ((__packed__));
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struct ast_iax2_meta_trunk_entry {
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unsigned short callno; /*!< Call number */
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unsigned short len; /*!< Length of data for this callno */
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} __attribute__ ((__packed__));
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/*! When trunktimestamps are used, we use this format instead */
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struct ast_iax2_meta_trunk_mini {
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unsigned short len;
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struct ast_iax2_mini_hdr mini; /*!< this is an actual miniframe */
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} __attribute__ ((__packed__));
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#define IAX_FIRMWARE_MAGIC 0x69617879
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struct ast_iax2_firmware_header {
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unsigned int magic; /*!< Magic number */
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unsigned short version; /*!< Software version */
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unsigned char devname[16]; /*!< Device */
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unsigned int datalen; /*!< Data length of file beyond header */
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unsigned char chksum[16]; /*!< Checksum of all data */
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unsigned char data[0];
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} __attribute__ ((__packed__));
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#endif
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