/* * libpri: An implementation of Primary Rate ISDN * * Written by Mark Spencer <markster@linux-support.net> * * Copyright (C) 2001, Linux Support Services, Inc. * All Rights Reserved. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. *  * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the * GNU General Public License for more details. *  * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  * */ #ifndef _PRI_Q931_H#define _PRI_Q931_Htypedef enum q931_state {	/* User states */	U0_NULL_STATE,	U1_CALL_INITIATED,	U2_OVERLAP_SENDING,	U3_OUTGOING_CALL_PROCEEDING,	U4_CALL_DELIVERED,	U6_CALL_PRESENT,	U7_CALL_RECEIVED,	U8_CONNECT_REQUEST,	U9_INCOMING_CALL_PROCEEDING,	U10_ACTIVE,	U11_DISCONNECT_REQUEST,	U12_DISCONNECT_INDICATION,	U15_SUSPEND_REQUEST,	U17_RESUME_REQUEST,	U19_RELEASE_REQUEST,	U25_OVERLAP_RECEIVING,	/* Network states */	N0_NULL_STATE,	N1_CALL_INITIATED,	N2_OVERLAP_SENDING,	N3_OUTGOING_CALL_PROCEEDING,	N4_CALL_DELIVERED,	N6_CALL_PRESENT,	N7_CALL_RECEIVED,	N8_CONNECT_REQUEST,	N9_INCOMING_CALL_PROCEEDING,	N10_ACTIVE,	N11_DISCONNECT_REQUEST,	N12_DISCONNECT_INDICATION,	N15_SUSPEND_REQUEST,	N17_RESUME_REQUEST,	N19_RELEASE_REQUEST,	N22_CALL_ABORT,	N25_OVERLAP_RECEIVING} q931_state;typedef enum q931_mode {	UNKNOWN_MODE,	CIRCUIT_MODE,	PACKET_MODE} q931_mode;typedef struct q931_h {	unsigned char raw[0];	u_int8_t pd;		/* Protocol Discriminator */#if __BYTE_ORDER == __BIG_ENDIAN	u_int8_t x0:4;	u_int8_t crlen:4;#else	u_int8_t crlen:4;	u_int8_t x0:4;#endif	u_int8_t contents[0];	u_int8_t crv[3];} __attribute__ ((packed)) q931_h;/* Message type header */typedef struct q931_mh {#if __BYTE_ORDER == __BIG_ENDIAN	u_int8_t f:1;	u_int8_t msg:7;#else	u_int8_t msg:7;	u_int8_t f:1;#endif	u_int8_t data[0];} __attribute__ ((packed)) q931_mh;/* Information element format */typedef struct q931_ie {	u_int8_t ie;	u_int8_t len;	u_int8_t data[0];} __attribute__ ((packed)) q931_ie;#define Q931_RES_HAVEEVENT (1 << 0)#define Q931_RES_INERRROR  (1 << 1)#define Q931_PROTOCOL_DISCRIMINATOR 0x08#define GR303_PROTOCOL_DISCRIMINATOR 0x4f/* Q.931 / National ISDN Message Types *//* Call Establishment Messages */#define Q931_ALERTING 				0x01#define Q931_CALL_PROCEEDING		0x02#define Q931_CONNECT				0x07#define Q931_CONNECT_ACKNOWLEDGE	0x0f#define Q931_PROGRESS				0x03#define Q931_SETUP					0x05#define Q931_SETUP_ACKNOWLEDGE		0x0d/* Call Disestablishment Messages */#define Q931_DISCONNECT				0x45#define Q931_RELEASE				0x4d#define Q931_RELEASE_COMPLETE		0x5a#define Q931_RESTART				0x46#define Q931_RESTART_ACKNOWLEDGE	0x4e/* Miscellaneous Messages */#define Q931_STATUS					0x7d#define Q931_STATUS_ENQUIRY			0x75#define Q931_USER_INFORMATION		0x20#define Q931_SEGMENT				0x60#define Q931_CONGESTION_CONTROL		0x79#define Q931_INFORMATION			0x7b#define Q931_FACILITY				0x62#define Q931_NOTIFY					0x6e/* Call Management Messages */#define Q931_HOLD					0x24#define Q931_HOLD_ACKNOWLEDGE		0x28#define Q931_HOLD_REJECT			0x30#define Q931_RETRIEVE				0x31#define Q931_RETRIEVE_ACKNOWLEDGE	0x33#define Q931_RETRIEVE_REJECT		0x37#define Q931_RESUME					0x26#define Q931_RESUME_ACKNOWLEDGE		0x2e#define Q931_RESUME_REJECT			0x22#define Q931_SUSPEND				0x25#define Q931_SUSPEND_ACKNOWLEDGE	0x2d#define Q931_SUSPEND_REJECT			0x21/* Maintenance messages (codeset 0 only) */#define NATIONAL_SERVICE			0x0f#define NATIONAL_SERVICE_ACKNOWLEDGE	0x07/* Special codeset 0 IE */#define	NATIONAL_CHANGE_STATUS		0x1/* Q.931 / National ISDN Information Elements */#define Q931_LOCKING_SHIFT			0x90#define Q931_NON_LOCKING_SHIFT		0x98#define Q931_BEARER_CAPABILITY		0x04#define Q931_CAUSE					0x08#define Q931_CALL_STATE				0x14#define Q931_CHANNEL_IDENT			0x18#define Q931_PROGRESS_INDICATOR		0x1e#define Q931_NETWORK_SPEC_FAC		0x20#define Q931_INFORMATION_RATE		0x40#define Q931_TRANSIT_DELAY			0x42#define Q931_TRANS_DELAY_SELECT		0x43#define Q931_BINARY_PARAMETERS		0x44#define Q931_WINDOW_SIZE			0x45#define Q931_PACKET_SIZE			0x46#define Q931_CLOSED_USER_GROUP		0x47#define Q931_REVERSE_CHARGE_INDIC	0x4a#define Q931_CALLING_PARTY_NUMBER	0x6c#define Q931_CALLING_PARTY_SUBADDR	0x6d#define Q931_CALLED_PARTY_NUMBER	0x70#define Q931_CALLED_PARTY_SUBADDR	0x71#define Q931_REDIRECTING_NUMBER		0x74#define Q931_REDIRECTING_SUBADDR	0x75#define Q931_TRANSIT_NET_SELECT		0x78#define Q931_RESTART_INDICATOR		0x79#define Q931_LOW_LAYER_COMPAT		0x7c#define Q931_HIGH_LAYER_COMPAT		0x7d#define Q931_CODESET(x)			((x) << 8)#define Q931_IE_CODESET(x)		((x) >> 8)#define Q931_IE_IE(x)			((x) & 0xff)#define Q931_FULL_IE(codeset, ie)	(((codeset) << 8) | ((ie) & 0xff))#define Q931_DISPLAY					0x28#define Q931_IE_SEGMENTED_MSG			0x00#define Q931_IE_CHANGE_STATUS			0x01#define Q931_IE_ORIGINATING_LINE_INFO		(0x01 | Q931_CODESET(6))#define Q931_IE_CONNECTED_ADDR			0x0C#define Q931_IE_CONNECTED_NUM			0x4C#define Q931_IE_CALL_IDENTITY			0x10#define Q931_IE_FACILITY				0x1c#define Q931_IE_ENDPOINT_ID				0x26#define Q931_IE_NOTIFY_IND				0x27#define Q931_IE_TIME_DATE				0x29#define Q931_IE_KEYPAD_FACILITY			0x2c#define Q931_IE_CALL_STATUS				0x2d#define Q931_IE_UPDATE                  0x31#define Q931_IE_INFO_REQUEST            0x32#define Q931_IE_SIGNAL					0x34#define Q931_IE_SWITCHHOOK				0x36#define Q931_IE_GENERIC_DIGITS			(0x37 | Q931_CODESET(6))#define Q931_IE_FEATURE_ACTIVATE		0x38#define Q931_IE_FEATURE_IND				0x39#define Q931_IE_ORIGINAL_CALLED_NUMBER 	0x73#define Q931_IE_REDIRECTION_NUMBER		0x76#define Q931_IE_REDIRECTION_SUBADDR		0x77#define Q931_IE_USER_USER_FACILITY		0x7A#define Q931_IE_USER_USER				0x7E#define Q931_IE_ESCAPE_FOR_EXT			0x7F/* Call state stuff */#define Q931_CALL_STATE_NULL				0#define Q931_CALL_STATE_CALL_INITIATED			1#define Q931_CALL_STATE_OVERLAP_SENDING			2#define Q931_CALL_STATE_OUTGOING_CALL_PROCEEDING	3#define Q931_CALL_STATE_CALL_DELIVERED			4#define Q931_CALL_STATE_CALL_PRESENT			6#define Q931_CALL_STATE_CALL_RECEIVED			7#define Q931_CALL_STATE_CONNECT_REQUEST			8#define Q931_CALL_STATE_INCOMING_CALL_PROCEEDING	9#define Q931_CALL_STATE_ACTIVE				10#define Q931_CALL_STATE_DISCONNECT_REQUEST		11#define Q931_CALL_STATE_DISCONNECT_INDICATION		12#define Q931_CALL_STATE_SUSPEND_REQUEST			15#define Q931_CALL_STATE_RESUME_REQUEST			17#define Q931_CALL_STATE_RELEASE_REQUEST			19#define Q931_CALL_STATE_OVERLAP_RECEIVING		25#define Q931_CALL_STATE_RESTART_REQUEST			61#define Q931_CALL_STATE_RESTART				62/* EuroISDN  */#define Q931_SENDING_COMPLETE		0xa1/* Q.SIG specific */#define QSIG_IE_TRANSIT_COUNT		0x31extern int q931_receive(struct pri *pri, q931_h *h, int len);extern int q931_alerting(struct pri *pri, q931_call *call, int channel, int info);extern int q931_call_progress(struct pri *pri, q931_call *call, int channel, int info);extern int q931_notify(struct pri *pri, q931_call *call, int channel, int info);extern int q931_call_proceeding(struct pri *pri, q931_call *call, int channel, int info);extern int q931_setup_ack(struct pri *pri, q931_call *call, int channel, int nonisdn);extern int q931_information(struct pri *pri, q931_call *call, char digit);extern int q931_keypad_facility(struct pri *pri, q931_call *call, char *digits);extern int q931_connect(struct pri *pri, q931_call *call, int channel, int nonisdn);extern int q931_release(struct pri *pri, q931_call *call, int cause);extern int q931_disconnect(struct pri *pri, q931_call *call, int cause);extern int q931_hangup(struct pri *pri, q931_call *call, int cause);extern int q931_restart(struct pri *pri, int channel);extern int q931_facility(struct pri *pri, q931_call *call);extern int q931_call_getcrv(struct pri *pri, q931_call *call, int *callmode);extern int q931_call_setcrv(struct pri *pri, q931_call *call, int crv, int callmode);extern q931_call *q931_new_call(struct pri *pri);extern int q931_setup(struct pri *pri, q931_call *c, struct pri_sr *req);extern void q931_dump(struct pri *pri, q931_h *h, int len, int txrx);extern void __q931_destroycall(struct pri *pri, q931_call *c);extern void q931_dl_indication(struct pri *pri, int event);#endif