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| Current File : //usr/src/libexec/rbootd/rmp_var.h |
/*
* 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.
*
* from: @(#)rmp_var.h 8.1 (Berkeley) 6/4/93
*
* from: 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_int8_t))
#define RMPDONESIZE (sizeof(struct hp_hdr) + sizeof(struct hp_llc) + \
sizeof(struct rmp_boot_done))
#define RMPBOOTDATA 255
#define RMPREADDATA (RMPDATALEN - \
(2*sizeof(u_int8_t)+sizeof(u_int16_t)+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 can't access (or don't, by default, align) words
* on half-word boundaries. If you know that your machine does not suffer
* from this problem, add it to the vax/tahoe/m68k #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. Endianness is handled by use of ntohl/htonl
*/
#if defined(__vax__) || defined(__tahoe__) || defined(__m68k__)
typedef u_int32_t u_word;
#define WORDZE(w) ((w) == 0)
#define ZEROWORD(w) (w) = 0
#define COPYWORD(w1,w2) (w2) = (w1)
#define GETWORD(w, i) (i) = ntohl(w)
#define PUTWORD(i, w) (w) = htonl(i)
#else
#define _WORD_HIGHPART 0
#define _WORD_LOWPART 1
typedef struct _uword { u_int16_t 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_int32_t)ntohs((w).val[_WORD_HIGHPART])) << 16) | ntohs((w).val[_WORD_LOWPART])
#define PUTWORD(i, w) \
{ (w).val[_WORD_HIGHPART] = htons((u_int16_t) ((i >> 16) & 0xffff)); \
(w).val[_WORD_LOWPART] = htons((u_int16_t) (i & 0xffff)); \
}
#endif
/*
* Packet structures.
*/
struct rmp_raw { /* generic RMP packet */
u_int8_t rmp_type; /* packet type */
u_int8_t rmp_rawdata[RMPDATALEN-1];
};
struct rmp_boot_req { /* boot request */
u_int8_t rmp_type; /* packet type (RMP_BOOT_REQ) */
u_int8_t rmp_retcode; /* return code (0) */
u_word rmp_seqno; /* sequence number (real time clock) */
u_int16_t rmp_session; /* session id (normally 0) */
u_int16_t rmp_version; /* protocol version (RMP_VERSION) */
char rmp_machtype[RMP_MACHLEN]; /* machine type */
u_int8_t rmp_flnmsize; /* length of rmp_flnm */
restofpkt rmp_flnm; /* name of file to be read */
};
struct rmp_boot_repl { /* boot reply */
u_int8_t rmp_type; /* packet type (RMP_BOOT_REPL) */
u_int8_t rmp_retcode; /* return code (normally 0) */
u_word rmp_seqno; /* sequence number (from boot req) */
u_int16_t rmp_session; /* session id (generated) */
u_int16_t rmp_version; /* protocol version (RMP_VERSION) */
u_int8_t rmp_flnmsize; /* length of rmp_flnm */
restofpkt rmp_flnm; /* name of file (from boot req) */
};
struct rmp_read_req { /* read request */
u_int8_t rmp_type; /* packet type (RMP_READ_REQ) */
u_int8_t rmp_retcode; /* return code (0) */
u_word rmp_offset; /* file relative byte offset */
u_int16_t rmp_session; /* session id (from boot repl) */
u_int16_t rmp_size; /* max no of bytes to send */
};
struct rmp_read_repl { /* read reply */
u_int8_t rmp_type; /* packet type (RMP_READ_REPL) */
u_int8_t rmp_retcode; /* return code (normally 0) */
u_word rmp_offset; /* byte offset (from read req) */
u_int16_t rmp_session; /* session id (from read req) */
restofpkt rmp_data; /* data (max size from read req) */
u_int8_t rmp_unused; /* padding to 16-bit boundary */
};
struct rmp_boot_done { /* boot complete */
u_int8_t rmp_type; /* packet type (RMP_BOOT_DONE) */
u_int8_t rmp_retcode; /* return code (0) */
u_word rmp_unused; /* not used (0) */
u_int16_t 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_rawdata
#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