[apple/network_cmds.git] / rbootd.tproj / rmp_var.h

/*
 * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_LICENSE_HEADER_START@
 * 
 * "Portions Copyright (c) 1999 Apple Computer, Inc.  All Rights
 * Reserved.  This file contains Original Code and/or Modifications of
 * Original Code as defined in and that are subject to the Apple Public
 * Source License Version 1.0 (the 'License').  You may not use this file
 * except in compliance with the License.  Please obtain a copy of the
 * License at http://www.apple.com/publicsource and read it before using
 * this file.
 * 
 * The Original Code and all software distributed under the License are
 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
 * License for the specific language governing rights and limitations
 * under the License."
 * 
 * @APPLE_LICENSE_HEADER_END@
 */
/*
 * Copyright (c) 1988, 1992 The University of Utah and the Center
 *	for Software Science (CSS).
 * Copyright (c) 1992, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * the Center for Software Science of the University of Utah Computer
 * Science Department.  CSS requests users of this software to return
 * to css-dist@cs.utah.edu any improvements that they make and grant
 * CSS redistribution rights.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *	@(#)rmp_var.h	8.1 (Berkeley) 6/4/93
 *
 * Utah $Hdr: rmp_var.h 3.1 92/07/06$
 * Author: Jeff Forys, University of Utah CSS
 */

/*
 *  Possible values for "rmp_type" fields.
 */

#define	RMP_BOOT_REQ	1	/* boot request packet */
#define	RMP_BOOT_REPL	129	/* boot reply packet */
#define	RMP_READ_REQ	2	/* read request packet */
#define	RMP_READ_REPL	130	/* read reply packet */
#define	RMP_BOOT_DONE	3	/* boot complete packet */

/*
 *  Useful constants.
 */

#define RMP_VERSION	2	/* protocol version */
#define RMP_TIMEOUT	600	/* timeout connection after ten minutes */
#define	RMP_PROBESID	0xffff	/* session ID for probes */
#define	RMP_HOSTLEN	13	/* max length of server's name */
#define	RMP_MACHLEN	20	/* length of machine type field */

/*
 *  RMP error codes
 */

#define	RMP_E_OKAY	0
#define	RMP_E_EOF	2	/* read reply: returned end of file */
#define	RMP_E_ABORT	3	/* abort operation */
#define	RMP_E_BUSY	4	/* boot reply: server busy */
#define	RMP_E_TIMEOUT	5	/* lengthen time out (not implemented) */
#define	RMP_E_NOFILE	16	/* boot reply: file does not exist */
#define RMP_E_OPENFILE	17	/* boot reply: file open failed */
#define	RMP_E_NODFLT	18	/* boot reply: default file does not exist */
#define RMP_E_OPENDFLT	19	/* boot reply: default file open failed */
#define	RMP_E_BADSID	25	/* read reply: bad session ID */
#define RMP_E_BADPACKET	27 	/* Bad packet detected */

/*
 *  RMPDATALEN is the maximum number of data octets that can be stuffed
 *  into an RMP packet.  This excludes the 802.2 LLC w/HP extensions.
 */
#define RMPDATALEN	(RMP_MAX_PACKET - (sizeof(struct hp_hdr) + \
			                   sizeof(struct hp_llc)))

/*
 *  Define sizes of packets we send.  Boot and Read replies are variable
 *  in length depending on the length of `s'.
 *
 *  Also, define how much space `restofpkt' can take up for outgoing
 *  Boot and Read replies.  Boot Request packets are effectively
 *  limited to 255 bytes due to the preceding 1-byte length field.
 */

#define	RMPBOOTSIZE(s)	(sizeof(struct hp_hdr) + sizeof(struct hp_llc) + \
			 sizeof(struct rmp_boot_repl) + s - sizeof(restofpkt))
#define	RMPREADSIZE(s)	(sizeof(struct hp_hdr) + sizeof(struct hp_llc) + \
			 sizeof(struct rmp_read_repl) + s - sizeof(restofpkt) \
			 - sizeof(u_char))
#define	RMPDONESIZE	(sizeof(struct hp_hdr) + sizeof(struct hp_llc) + \
			 sizeof(struct rmp_boot_done))
#define	RMPBOOTDATA	255
#define	RMPREADDATA	(RMPDATALEN - \
			 (2*sizeof(u_char)+sizeof(u_short)+sizeof(u_word)))

/*
 * This protocol defines some field sizes as "rest of ethernet packet".
 * There is no easy way to specify this in C, so we use a one character
 * field to denote it, and index past it to the end of the packet.
 */

typedef char	restofpkt;

/*
 * Due to the RMP packet layout, we'll run into alignment problems
 * on machines that cant access words on half-word boundaries.  If
 * you know that your machine does not suffer from this problem,
 * add it to the hp300 #define below.
 *
 * The following macros are used to deal with this problem:
 *	WORDZE(w)	Return True if u_word `w' is zero, False otherwise.
 *	ZEROWORD(w)	Set u_word `w' to zero.
 *	COPYWORD(w1,w2)	Copy u_word `w1' to `w2'.
 *	GETWORD(w,i)	Copy u_word `w' into int `i'.
 *	PUTWORD(i,w)	Copy int `i' into u_word `w'.
 *
 * N.B. We do not support little endian alignment-challenged machines.
 */
#if defined(vax) || defined(tahoe) || defined(hp300)

typedef	u_int		u_word;

#define	WORDZE(w)	((w) == 0)
#define	ZEROWORD(w)	(w) = 0
#define	COPYWORD(w1,w2)	(w2) = (w1)
#define	GETWORD(w, i)	(i) = (w)
#define	PUTWORD(i, w)	(w) = (i)

#else

#define	_WORD_HIGHPART	0	/* XXX: assume Big Endian for now */
#define	_WORD_LOWPART	1

typedef	struct _uword { u_short val[2]; }	u_word;

#define	WORDZE(w) \
	((w.val[_WORD_HIGHPART] == 0) && (w.val[_WORD_LOWPART] == 0))
#define	ZEROWORD(w) \
	(w).val[_WORD_HIGHPART] = (w).val[_WORD_LOWPART] = 0
#define	COPYWORD(w1, w2) \
	{ (w2).val[_WORD_HIGHPART] = (w1).val[_WORD_HIGHPART]; \
	  (w2).val[_WORD_LOWPART] = (w1).val[_WORD_LOWPART]; \
	}
#define	GETWORD(w, i) \
	(i) = (((u_int)(w).val[_WORD_HIGHPART]) << 16) | (w).val[_WORD_LOWPART]
#define	PUTWORD(i, w) \
	{ (w).val[_WORD_HIGHPART] = (u_short) (((i) >> 16) & 0xffff); \
	  (w).val[_WORD_LOWPART] = (u_short) (i & 0xffff); \
	}

#endif

/*
 * Packet structures.
 */

struct rmp_raw {		/* generic RMP packet */
	u_char	rmp_type;		/* packet type */
	u_char	rmp_rawdata[RMPDATALEN-1];
};

struct rmp_boot_req {		/* boot request */
	u_char	rmp_type;		/* packet type (RMP_BOOT_REQ) */
	u_char	rmp_retcode;		/* return code (0) */
	u_word	rmp_seqno;		/* sequence number (real time clock) */
	u_short	rmp_session;		/* session id (normally 0) */
	u_short	rmp_version;		/* protocol version (RMP_VERSION) */
	char	rmp_machtype[RMP_MACHLEN];	/* machine type */
	u_char	rmp_flnmsize;		/* length of rmp_flnm */
	restofpkt rmp_flnm;		/* name of file to be read */
};

struct rmp_boot_repl {		/* boot reply */
	u_char	rmp_type;		/* packet type (RMP_BOOT_REPL) */
	u_char	rmp_retcode;		/* return code (normally 0) */
	u_word	rmp_seqno;		/* sequence number (from boot req) */
	u_short	rmp_session;		/* session id (generated) */
	u_short	rmp_version;		/* protocol version (RMP_VERSION) */
	u_char	rmp_flnmsize;		/* length of rmp_flnm */
	restofpkt rmp_flnm;		/* name of file (from boot req) */
};

struct rmp_read_req {		/* read request */
	u_char	rmp_type;		/* packet type (RMP_READ_REQ) */
	u_char	rmp_retcode;		/* return code (0) */
	u_word	rmp_offset;		/* file relative byte offset */
	u_short	rmp_session;		/* session id (from boot repl) */
	u_short	rmp_size;		/* max no of bytes to send */
};

struct rmp_read_repl {		/* read reply */
	u_char	rmp_type;		/* packet type (RMP_READ_REPL) */
	u_char	rmp_retcode;		/* return code (normally 0) */
	u_word	rmp_offset;		/* byte offset (from read req) */
	u_short	rmp_session;		/* session id (from read req) */
	restofpkt rmp_data;		/* data (max size from read req) */
	u_char	rmp_unused;		/* padding to 16-bit boundary */
};

struct rmp_boot_done {		/* boot complete */
	u_char	rmp_type;		/* packet type (RMP_BOOT_DONE) */
	u_char	rmp_retcode;		/* return code (0) */
	u_word	rmp_unused;		/* not used (0) */
	u_short	rmp_session;		/* session id (from read repl) */
};

struct rmp_packet {
	struct hp_hdr hp_hdr;
	struct hp_llc hp_llc;
	union {
		struct rmp_boot_req	rmp_brq;	/* boot request */
		struct rmp_boot_repl	rmp_brpl;	/* boot reply */
		struct rmp_read_req	rmp_rrq;	/* read request */
		struct rmp_read_repl	rmp_rrpl;	/* read reply */
		struct rmp_boot_done	rmp_done;	/* boot complete */
		struct rmp_raw		rmp_raw;	/* raw data */
	} rmp_proto;
};

/*
 *  Make life easier...
 */

#define	r_type	rmp_proto.rmp_raw.rmp_type
#define	r_data	rmp_proto.rmp_raw.rmp_data
#define	r_brq	rmp_proto.rmp_brq
#define	r_brpl	rmp_proto.rmp_brpl
#define	r_rrq	rmp_proto.rmp_rrq
#define	r_rrpl	rmp_proto.rmp_rrpl
#define	r_done	rmp_proto.rmp_done
Commit	Line	Data
b7080c8e A	1	/*
	2	* Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
	3	*
	4	* @APPLE_LICENSE_HEADER_START@
	5	*
	6	* "Portions Copyright (c) 1999 Apple Computer, Inc. All Rights
	7	* Reserved. This file contains Original Code and/or Modifications of
	8	* Original Code as defined in and that are subject to the Apple Public
	9	* Source License Version 1.0 (the 'License'). You may not use this file
	10	* except in compliance with the License. Please obtain a copy of the
	11	* License at http://www.apple.com/publicsource and read it before using
	12	* this file.
	13	*
	14	* The Original Code and all software distributed under the License are
	15	* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
	16	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
	17	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
	18	* FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
	19	* License for the specific language governing rights and limitations
	20	* under the License."
	21	*
	22	* @APPLE_LICENSE_HEADER_END@
	23	*/
	24	/*
	25	* Copyright (c) 1988, 1992 The University of Utah and the Center
	26	* for Software Science (CSS).
	27	* Copyright (c) 1992, 1993
	28	* The Regents of the University of California. All rights reserved.
	29	*
	30	* This code is derived from software contributed to Berkeley by
	31	* the Center for Software Science of the University of Utah Computer
	32	* Science Department. CSS requests users of this software to return
	33	* to css-dist@cs.utah.edu any improvements that they make and grant
	34	* CSS redistribution rights.
	35	*
	36	* Redistribution and use in source and binary forms, with or without
	37	* modification, are permitted provided that the following conditions
	38	* are met:
	39	* 1. Redistributions of source code must retain the above copyright
	40	* notice, this list of conditions and the following disclaimer.
	41	* 2. Redistributions in binary form must reproduce the above copyright
	42	* notice, this list of conditions and the following disclaimer in the
	43	* documentation and/or other materials provided with the distribution.
	44	* 3. All advertising materials mentioning features or use of this software
	45	* must display the following acknowledgement:
	46	* This product includes software developed by the University of
	47	* California, Berkeley and its contributors.
	48	* 4. Neither the name of the University nor the names of its contributors
	49	* may be used to endorse or promote products derived from this software
	50	* without specific prior written permission.
	51	*
	52	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	53	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	54	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	55	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	56	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	57	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	58	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	59	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	60	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	61	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	62	* SUCH DAMAGE.
	63	*
	64	* @(#)rmp_var.h 8.1 (Berkeley) 6/4/93
65	*
66	* Utah $Hdr: rmp_var.h 3.1 92/07/06$
67	* Author: Jeff Forys, University of Utah CSS
68	*/
69
70	/*
71	* Possible values for "rmp_type" fields.
72	*/
73
74	#define RMP_BOOT_REQ 1 /* boot request packet */
75	#define RMP_BOOT_REPL 129 /* boot reply packet */
76	#define RMP_READ_REQ 2 /* read request packet */
77	#define RMP_READ_REPL 130 /* read reply packet */
78	#define RMP_BOOT_DONE 3 /* boot complete packet */
79
80	/*
81	* Useful constants.
82	*/
83
84	#define RMP_VERSION 2 /* protocol version */
85	#define RMP_TIMEOUT 600 /* timeout connection after ten minutes */
86	#define RMP_PROBESID 0xffff /* session ID for probes */
87	#define RMP_HOSTLEN 13 /* max length of server's name */
88	#define RMP_MACHLEN 20 /* length of machine type field */
89
90	/*
91	* RMP error codes
92	*/
93
94	#define RMP_E_OKAY 0
95	#define RMP_E_EOF 2 /* read reply: returned end of file */
96	#define RMP_E_ABORT 3 /* abort operation */
97	#define RMP_E_BUSY 4 /* boot reply: server busy */
98	#define RMP_E_TIMEOUT 5 /* lengthen time out (not implemented) */
99	#define RMP_E_NOFILE 16 /* boot reply: file does not exist */
100	#define RMP_E_OPENFILE 17 /* boot reply: file open failed */
101	#define RMP_E_NODFLT 18 /* boot reply: default file does not exist */
102	#define RMP_E_OPENDFLT 19 /* boot reply: default file open failed */
103	#define RMP_E_BADSID 25 /* read reply: bad session ID */
104	#define RMP_E_BADPACKET 27 /* Bad packet detected */
105
106	/*
107	* RMPDATALEN is the maximum number of data octets that can be stuffed
108	* into an RMP packet. This excludes the 802.2 LLC w/HP extensions.
109	*/
110	#define RMPDATALEN (RMP_MAX_PACKET - (sizeof(struct hp_hdr) + \
111	sizeof(struct hp_llc)))
112
113	/*
114	* Define sizes of packets we send. Boot and Read replies are variable
115	* in length depending on the length of `s'.
116	*
117	* Also, define how much space `restofpkt' can take up for outgoing
118	* Boot and Read replies. Boot Request packets are effectively
119	* limited to 255 bytes due to the preceding 1-byte length field.
120	*/
121
122	#define RMPBOOTSIZE(s) (sizeof(struct hp_hdr) + sizeof(struct hp_llc) + \
123	sizeof(struct rmp_boot_repl) + s - sizeof(restofpkt))
124	#define RMPREADSIZE(s) (sizeof(struct hp_hdr) + sizeof(struct hp_llc) + \
125	sizeof(struct rmp_read_repl) + s - sizeof(restofpkt) \
126	- sizeof(u_char))
127	#define RMPDONESIZE (sizeof(struct hp_hdr) + sizeof(struct hp_llc) + \
128	sizeof(struct rmp_boot_done))
129	#define RMPBOOTDATA 255
130	#define RMPREADDATA (RMPDATALEN - \
131	(2*sizeof(u_char)+sizeof(u_short)+sizeof(u_word)))
132
133	/*
134	* This protocol defines some field sizes as "rest of ethernet packet".
135	* There is no easy way to specify this in C, so we use a one character
136	* field to denote it, and index past it to the end of the packet.
137	*/
138
139	typedef char restofpkt;
140
141	/*
142	* Due to the RMP packet layout, we'll run into alignment problems
143	* on machines that cant access words on half-word boundaries. If
144	* you know that your machine does not suffer from this problem,
145	* add it to the hp300 #define below.
146	*
147	* The following macros are used to deal with this problem:
148	* WORDZE(w) Return True if u_word `w' is zero, False otherwise.
149	* ZEROWORD(w) Set u_word `w' to zero.
150	* COPYWORD(w1,w2) Copy u_word `w1' to `w2'.
151	* GETWORD(w,i) Copy u_word `w' into int `i'.
152	* PUTWORD(i,w) Copy int `i' into u_word `w'.
153	*
154	* N.B. We do not support little endian alignment-challenged machines.
155	*/
156	#if defined(vax) \|\| defined(tahoe) \|\| defined(hp300)
157
158	typedef u_int u_word;
159
160	#define WORDZE(w) ((w) == 0)
161	#define ZEROWORD(w) (w) = 0
162	#define COPYWORD(w1,w2) (w2) = (w1)
163	#define GETWORD(w, i) (i) = (w)
164	#define PUTWORD(i, w) (w) = (i)
165
166	#else
167
168	#define _WORD_HIGHPART 0 /* XXX: assume Big Endian for now */
169	#define _WORD_LOWPART 1
170
171	typedef struct _uword { u_short val[2]; } u_word;
172
173	#define WORDZE(w) \
174	((w.val[_WORD_HIGHPART] == 0) && (w.val[_WORD_LOWPART] == 0))
175	#define ZEROWORD(w) \
176	(w).val[_WORD_HIGHPART] = (w).val[_WORD_LOWPART] = 0
177	#define COPYWORD(w1, w2) \
178	{ (w2).val[_WORD_HIGHPART] = (w1).val[_WORD_HIGHPART]; \
179	(w2).val[_WORD_LOWPART] = (w1).val[_WORD_LOWPART]; \
180	}
181	#define GETWORD(w, i) \
182	(i) = (((u_int)(w).val[_WORD_HIGHPART]) << 16) \| (w).val[_WORD_LOWPART]
183	#define PUTWORD(i, w) \
184	{ (w).val[_WORD_HIGHPART] = (u_short) (((i) >> 16) & 0xffff); \
185	(w).val[_WORD_LOWPART] = (u_short) (i & 0xffff); \
186	}
187
188	#endif
189
190	/*
191	* Packet structures.
192	*/
193
194	struct rmp_raw { /* generic RMP packet */
195	u_char rmp_type; /* packet type */
196	u_char rmp_rawdata[RMPDATALEN-1];
197	};
198
199	struct rmp_boot_req { /* boot request */
200	u_char rmp_type; /* packet type (RMP_BOOT_REQ) */
201	u_char rmp_retcode; /* return code (0) */
202	u_word rmp_seqno; /* sequence number (real time clock) */
203	u_short rmp_session; /* session id (normally 0) */
204	u_short rmp_version; /* protocol version (RMP_VERSION) */
205	char rmp_machtype[RMP_MACHLEN]; /* machine type */
206	u_char rmp_flnmsize; /* length of rmp_flnm */
207	restofpkt rmp_flnm; /* name of file to be read */
208	};
209
210	struct rmp_boot_repl { /* boot reply */
211	u_char rmp_type; /* packet type (RMP_BOOT_REPL) */
212	u_char rmp_retcode; /* return code (normally 0) */
213	u_word rmp_seqno; /* sequence number (from boot req) */
214	u_short rmp_session; /* session id (generated) */
215	u_short rmp_version; /* protocol version (RMP_VERSION) */
216	u_char rmp_flnmsize; /* length of rmp_flnm */
217	restofpkt rmp_flnm; /* name of file (from boot req) */
218	};
219
220	struct rmp_read_req { /* read request */
221	u_char rmp_type; /* packet type (RMP_READ_REQ) */
222	u_char rmp_retcode; /* return code (0) */
223	u_word rmp_offset; /* file relative byte offset */
224	u_short rmp_session; /* session id (from boot repl) */
225	u_short rmp_size; /* max no of bytes to send */
226	};
227
228	struct rmp_read_repl { /* read reply */
229	u_char rmp_type; /* packet type (RMP_READ_REPL) */
230	u_char rmp_retcode; /* return code (normally 0) */
231	u_word rmp_offset; /* byte offset (from read req) */
232	u_short rmp_session; /* session id (from read req) */
233	restofpkt rmp_data; /* data (max size from read req) */
234	u_char rmp_unused; /* padding to 16-bit boundary */
235	};
236
237	struct rmp_boot_done { /* boot complete */
238	u_char rmp_type; /* packet type (RMP_BOOT_DONE) */
239	u_char rmp_retcode; /* return code (0) */
240	u_word rmp_unused; /* not used (0) */
241	u_short rmp_session; /* session id (from read repl) */
242	};
243
244	struct rmp_packet {
245	struct hp_hdr hp_hdr;
246	struct hp_llc hp_llc;
247	union {
248	struct rmp_boot_req rmp_brq; /* boot request */
249	struct rmp_boot_repl rmp_brpl; /* boot reply */
250	struct rmp_read_req rmp_rrq; /* read request */
251	struct rmp_read_repl rmp_rrpl; /* read reply */
252	struct rmp_boot_done rmp_done; /* boot complete */
253	struct rmp_raw rmp_raw; /* raw data */
254	} rmp_proto;
255	};
256
257	/*
258	* Make life easier...
259	*/
260
261	#define r_type rmp_proto.rmp_raw.rmp_type
262	#define r_data rmp_proto.rmp_raw.rmp_data
263	#define r_brq rmp_proto.rmp_brq
264	#define r_brpl rmp_proto.rmp_brpl
265	#define r_rrq rmp_proto.rmp_rrq
266	#define r_rrpl rmp_proto.rmp_rrpl
267	#define r_done rmp_proto.rmp_done