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1 /*
2  * Copyright (c) 1997 Yen Yen Lim and North Dakota State University
3  * All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  * 1. Redistributions of source code must retain the above copyright
9  *    notice, this list of conditions and the following disclaimer.
10  * 2. Redistributions in binary form must reproduce the above copyright
11  *    notice, this list of conditions and the following disclaimer in the
12  *    documentation and/or other materials provided with the distribution.
13  * 3. All advertising materials mentioning features or use of this software
14  *    must display the following acknowledgement:
15  *      This product includes software developed by Yen Yen Lim and
16         North Dakota State University
17  * 4. The name of the author may not be used to endorse or promote products
18  *    derived from this software without specific prior written permission.
19  *
20  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
21  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
22  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
23  * DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
24  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
25  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
26  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
28  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
29  * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
30  * POSSIBILITY OF SUCH DAMAGE.
31  */
32 
33 /* Based on UNI3.1 standard by ATM Forum */
34 
35 /* ATM traffic types based on VPI=0 and (the following VCI */
36 #define VCI_PPC			0x05	/* Point-to-point signal msg */
37 #define VCI_BCC			0x02	/* Broadcast signal msg */
38 #define VCI_OAMF4SC		0x03	/* Segment OAM F4 flow cell */
39 #define VCI_OAMF4EC		0x04	/* End-to-end OAM F4 flow cell */
40 #define VCI_METAC		0x01	/* Meta signal msg */
41 #define VCI_ILMIC		0x10	/* ILMI msg */
42 
43 /* Q.2931 signalling messages */
44 #define CALL_PROCEED		0x02	/* call proceeding */
45 #define CONNECT			0x07	/* connect */
46 #define CONNECT_ACK		0x0f	/* connect_ack */
47 #define SETUP			0x05	/* setup */
48 #define RELEASE			0x4d	/* release */
49 #define RELEASE_DONE		0x5a	/* release_done */
50 #define RESTART			0x46	/* restart */
51 #define RESTART_ACK		0x4e	/* restart ack */
52 #define STATUS			0x7d	/* status */
53 #define STATUS_ENQ		0x75	/* status ack */
54 #define ADD_PARTY		0x80	/* add party */
55 #define ADD_PARTY_ACK		0x81	/* add party ack */
56 #define ADD_PARTY_REJ		0x82	/* add party rej */
57 #define DROP_PARTY		0x83	/* drop party */
58 #define DROP_PARTY_ACK		0x84	/* drop party ack */
59 
60 /* Information Element Parameters in the signalling messages */
61 #define CAUSE			0x08	/* cause */
62 #define ENDPT_REF		0x54	/* endpoint reference */
63 #define AAL_PARA		0x58	/* ATM adaptation layer parameters */
64 #define TRAFF_DESCRIP		0x59	/* atm traffic descriptors */
65 #define CONNECT_ID		0x5a	/* connection identifier */
66 #define QOS_PARA		0x5c	/* quality of service parameters */
67 #define B_HIGHER		0x5d	/* broadband higher layer information */
68 #define B_BEARER		0x5e	/* broadband bearer capability */
69 #define B_LOWER			0x5f	/* broadband lower information */
70 #define CALLING_PARTY		0x6c	/* calling party number */
71 #define CALLED_PARTY		0x70	/* called party nmber */
72 
73 #define Q2931			0x09
74 
75 /* Q.2931 signalling general messages format */
76 #define PROTO_POS       0	/* offset of protocol discriminator */
77 #define CALL_REF_POS    2	/* offset of call reference value */
78 #define MSG_TYPE_POS    5	/* offset of message type */
79 #define MSG_LEN_POS     7	/* offset of mesage length */
80 #define IE_BEGIN_POS    9	/* offset of first information element */
81 
82 /* format of signalling messages */
83 #define TYPE_POS	0
84 #define LEN_POS		2
85 #define FIELD_BEGIN_POS 4
86